Commit Graph

1563 Commits

Author SHA1 Message Date
Erik Gilling 2078cf3b22 i2c: tegra: fix repeated start handling
A repeated start should be used for all but the last msg in an xfer.  The
NOSTART flag is for skipping the START frame (addr/rw)

Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-05-11 06:45:50 +01:00
Todd Poynor cb63c62d8e i2c: tegra: recover from spurious interrupt storm
Re-init the I2C controller when an IRQ arrives with no
I2C_INT_STATUS bits set to indicate why the interrupt was sent.
Storms of such mystery interrupts are infrequently seen.

Dump some more status when these interrupts arrive.  Set an error
for the current request and wake up the requester (rather than
timing out the request or possibly silently ignoring the interrupts).

If the I2C block is inside the DVC, also ACK the DVC I2C transfer
done interrupt in the ISR error return path, as is done for the
normal return path.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
[swarren: Fix minor checkpatch whitespace issue, commit tag]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-05-11 06:45:50 +01:00
Kenneth Waters 65a1a0ace5 i2c: tegra: Enable new slave mode.
For Tegra i2c controller to function properly new slave mode must be
enabled.

swarren notes:

In particular, I found this was needed when working on enabling the
Tegra audio driver on the Seaboard board. There are two different PCB
layouts for this board; a "clamshell" version, which works just fine
without this change, and the original non-clamshell version, which needs
this change in order for I2C to operate correctly. Without it, I2C
probing fails for some devices, e.g. with:

wm8903 0-001a: Device with ID register 0 is not a WM8903
wm8903 0-001a: asoc: failed to probe CODEC wm8903.0-001a: -19
asoc: failed to instantiate card tegra-wm8903: -19
ALSA device list:
  No soundcards found.

Signed-off-by: Rakesh Iyer <riyer@nvidia.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-05-11 06:45:08 +01:00
Jean Delvare 56acc7a39a i2c-parport: Fix adapter list handling
Use a standard list with proper locking to handle the list of
adapters. Thankfully it only matters on systems with more than one
parallel port, which are very rare.

Thanks to Lukasz Kapiec for reporting the problem to me.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
2011-05-01 18:18:49 +02:00
Jean Delvare a6e5e2be44 i2c-i801: Move device ID definitions to driver
Move the SMBus device ID definitions of recent devices from pci_ids.h
to the i2c-i801.c driver file. They don't have to be shared, as they
are clearly identified and only used in this driver. In the future,
such IDs will go to i2c-i801 directly. This will make adding support
for new devices much faster and easier, as it will avoid cross-
subsystem patch sets and merge conflicts.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Seth Heasley <seth.heasley@intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-05-01 18:18:49 +02:00
Guennadi Liakhovetski 7ef0c12a28 i2c: add a module alias to the sh-mobile driver
This patch enables I2C driver autoloading on sh-mobile systems.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Simon Horman <horms@verge.net.au>
Cc: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-04-18 18:44:54 +09:00
Alex Deucher d3b3e15da1 i2c-algo-bit: Call pre/post_xfer for bit_test
Apparently some distros set i2c-algo-bit.bit_test to 1 by
default.  In some cases this causes i2c_bit_add_bus
to fail and prevents the i2c bus from being added.  In the
radeon case, we fail to add the ddc i2c buses which prevents
the driver from being able to detect attached monitors.
The i2c bus works fine even if bit_test fails.  This is likely
due to gpio switching that is required and handled in the
pre/post_xfer hooks, so call the pre/post_xfer hooks in the
bit test as well.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=36221

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org [.38 down to .34]
2011-04-17 10:20:19 +02:00
Jean Delvare a920ff41cb i2c: Improve deprecation warnings
When warning on the use of deprecated i2c_driver methods
attach_adapter and detach_adapter, mention the name of the driver
which needs to be updated.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-04-17 10:20:19 +02:00
Lucas De Marchi 25985edced Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 11:26:23 -03:00
Andres Salomon e46dccff34 mfd: mfd_cell is now implicitly available to timberdale drivers
The cell's platform_data is now accessed with a helper function;
change clients to use that, and remove the now-unused data_size.

Note that the mfd's platform_data is marked __devinitdata.  This
is still correct in all cases except for the timbgpio driver, whose
remove hook has been changed to no longer reference the pdata.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-23 10:41:52 +01:00
Linus Torvalds 75ea6358bc Merge branch 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linux
* 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linux:
  i2c-pxa2xx: Don't clear isr bits too early
  i2c-pxa2xx: Fix register offsets
  i2c-pxa2xx: pass of_node from platform driver to adapter and publish
  i2c-pxa2xx: check timeout correctly
  i2c-pxa2xx: add support for shared IRQ handler
  i2c-pxa2xx: Add PCI support for PXA I2C controller
  ARM: pxa2xx: reorganize I2C files
  i2c-pxa2xx: use dynamic register layout
  i2c-mxs: set controller to pio queue mode after reset
  i2c-eg20t: support new device OKI SEMICONDUCTOR ML7213 IOH
  i2c/busses: Add support for Diolan U2C-12 USB-I2C adapter
2011-03-22 10:05:27 -07:00
Vasily Khoruzhick 97491ba3f6 i2c-pxa2xx: Don't clear isr bits too early
isr is passed later into i2c_pxa_irq_txempty and
i2c_pxa_irq_rxfull and they may use some other bits
than irq sources.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 23:00:12 +00:00
Ben Dooks a0774f4511 Merge branches 'for-2639/i2c/i2c-ce4100-v6', 'for-2639/i2c/i2c-eg20t-v3' and 'for-2639/i2c/i2c-imx' into for-linus/2639/i2c-2 2011-03-21 22:57:25 +00:00
Vasily Khoruzhick 23e74a86ab i2c-pxa2xx: Fix register offsets
Fix regression that was introduced by dynamic register layout.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:24:08 +00:00
Sebastian Andrzej Siewior baa8cab012 i2c-pxa2xx: pass of_node from platform driver to adapter and publish
the of_node will auto-publish devices which are added to the device
tree.

Commit 925bb9c6 aka ("of/i2c: Fix module load order issue caused by
of_i2c.c) moved the of_i2c_register_devices() function from the i2c core
back to the drivers. This patch does the same thing for the pxa driver.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:23:57 +00:00
Sebastian Andrzej Siewior 93c92cfdec i2c-pxa2xx: check timeout correctly
timeout here maybe 0 if the event occured and a task with a higher
priority stole the cpu and we were sleeping longer than the timeout
value we specified.
In case of a real timeout I changed the error code to I2C_RETRY so we
retry the transfer.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:23:55 +00:00
Sebastian Andrzej Siewior c66dc52919 i2c-pxa2xx: add support for shared IRQ handler
Sodaville has three of them on a single IRQ. IRQF_DISABLED is removed
because it is a NOP allready and scheduled for removal.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:23:52 +00:00
Sebastian Andrzej Siewior 7e94dd154e i2c-pxa2xx: Add PCI support for PXA I2C controller
The Sodaville I2C controller is almost the same as found on PXA2xx. The
difference:
- the register are at a different offset
- no slave support

The PCI probe code adds three platform devices which are probed then by
the platform code.
The X86 part also adds dummy clock defines because we don't have HW
clock support.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:18:54 +00:00
Sebastian Andrzej Siewior b459396ee9 ARM: pxa2xx: reorganize I2C files
This patch moves the platform data definition from
arch/arm/plat-pxa/include/plat/i2c.h to include/linux/i2c/pxa-i2c.h so
it can be accessed from x86 the same way as on ARM.

This change should make no functional change to the PXA code. The move
is verified by building the following defconfigs:
  cm_x2xx_defconfig corgi_defconfig em_x270_defconfig ezx_defconfig
  imote2_defconfig pxa3xx_defconfig spitz_defconfig zeus_defconfig
  raumfeld_defconfig magician_defconfig mmp2_defconfig pxa168_defconfig
  pxa910_defconfig

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:09:33 +00:00
Sebastian Andrzej Siewior d6668c7cd4 i2c-pxa2xx: use dynamic register layout
This will prepare the driver to handle register layouts where certain
registers are not available at all.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-21 09:09:31 +00:00
Sascha Hauer 6b7d815c3f i2c-mxs: set controller to pio queue mode after reset
mxs_reset_block() clears the PIO_QUEUE_MODE bit. So we have
to set it again after a controller reset.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-20 23:54:52 +00:00
Ben Dooks e4394d553c Merge branch 'for-2639/i2c/i2c-u2c12' into for-linus/2639/i2c-12 2011-03-20 22:14:04 +00:00
Seth Heasley 662cda8abb i2c-i801: SMBus patch for Intel DH89xxCC DeviceIDs
Add the SMBus Controller DeviceIDs for the Intel DH89xxCC PCH.

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:53 +01:00
Jean Delvare fe6fc25857 i2c: Deprecate i2c_driver.attach_adapter and .detach_adapter
The last legitimate user of i2c_driver.attach_adapter and
.detach_adapter is gone, so we can finally deprecate these callbacks.
The last few drivers which still use these will have to be updated to
make use of standard I2C device instantiation ways instead.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:53 +01:00
Jean Delvare 9ea3e941d1 i2c-dev: Use standard bus notification mechanism
Use the standard driver core mechanism to keep track of i2c adapters
present on the system: i2c_for_each_dev and a notifier. This will let
us deprecate and ultimately remove the legacy attach_adapter and
detach_adapter callbacks in i2c_driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:52 +01:00
Jean Delvare 7ae31482a8 i2c: Export i2c_for_each_dev
Introduce i2c_for_each_dev(), an i2c device iterator with proper
locking for use by i2c-dev. This is needed so that we can get rid of
the attach_adapter and detach_adapter legacy callback functions.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:52 +01:00
Jean Delvare d735b34db3 i2c: make i2c_get_adapter prototype clearer
Rename the parameter of i2c_get_adapter() to "nr", to make it clear we
are passing an adapter number and not an adapter ID (which have gone
away by now.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:52 +01:00
Wolfram Sang 950a509785 i2c-boardinfo: Fix typo in comment
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20 14:50:52 +01:00
Linus Torvalds 02e4c627d8 Merge branch 'for-linus/2639/i2c-1' of git://git.fluff.org/bjdooks/linux
* 'for-linus/2639/i2c-1' of git://git.fluff.org/bjdooks/linux:
  i2c-mpc: Add support for 64bit system
  i2c: add driver for Freescale i.MX28
  i2c: tegra: Add i2c support
2011-03-17 17:10:19 -07:00
Linus Torvalds 7b7adc4a01 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32: (40 commits)
  unicore32: rewrite arch-specific tlb.h to use asm-generic version
  unicore32: modify io_p2v and io_v2p macros, and adjust PKUNITY_mmio_BASEs
  unicore32: replace unicore32-specific iomap functions with generic lib implementation
  unicore32 machine related: add frame buffer driver for pkunity-v3 soc
  unicore32 machine related files: add i2c bus drivers for pkunity-v3 soc
  unicore32 io: redefine __REG(x) and re-use readl/writel funcs
  unicore32 i8042 upgrade and bugfix: adjust resource request region type
  unicore32 upgrade to v2.6.38-rc5: add one more paramter for pte_alloc_map call
  unicore32 i8042: adjust io funcs of i8042-unicore32io.h
  unicore32: rename PKUNITY_IOSPACE_BASE to PKUNITY_MMIO_BASE
  unicore32: modify function names and parameters for irq_chips
  unicore32: remove unused lines in arch/unicore32/include/asm/irq.h
  unicore32 time.c: change calculate method for clock_event_device
  unicore32: ADD MAINTAINER for unicore32 architecture
  unicore32 machine related files: ps2 driver
  unicore32 machine related files: pci bus handling
  unicore32 machine related files: hardware registers
  unicore32 machine related files: core files
  unicore32 additional architecture files: boot process
  unicore32 additional architecture files: low-level lib: misc
  ...

Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-03-17 10:11:25 -07:00
GuanXuetao d10e4a660d unicore32 machine related files: add i2c bus drivers for pkunity-v3 soc
change from original version -- by advice of Jean Delvare
1. remove global variable i2c_reg, replaced by local variables
2. replace ENXIO with ENODEV when no platform resources
3. add adapter->nr assignment before i2c_add_numbered_adapter() call
4. add judgement for i2c_del_adapter() return value
5. release adapter when driver removed
6. add __devexit for puv3_i2c_remove() function
7. modify several names to more appropriated ones

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2011-03-17 09:19:20 +08:00
Linus Torvalds 4c5811bf46 Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6
* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6: (21 commits)
  tty: serial: altera_jtaguart: Add device tree support
  tty: serial: altera_uart: Add devicetree support
  dt: eliminate of_platform_driver shim code
  dt: Eliminate of_platform_{,un}register_driver
  dt/serial: Eliminate users of of_platform_{,un}register_driver
  dt/usb: Eliminate users of of_platform_{,un}register_driver
  dt/video: Eliminate users of of_platform_{,un}register_driver
  dt/net: Eliminate users of of_platform_{,un}register_driver
  dt/sound: Eliminate users of of_platform_{,un}register_driver
  dt/spi: Eliminate users of of_platform_{,un}register_driver
  dt: uartlite: merge platform and of_platform driver bindings
  dt: xilinx_hwicap: merge platform and of_platform driver bindings
  ipmi: convert OF driver to platform driver
  leds/leds-gpio: merge platform_driver with of_platform_driver
  dt/sparc: Eliminate users of of_platform_{,un}register_driver
  dt/powerpc: Eliminate users of of_platform_{,un}register_driver
  dt/powerpc: move of_bus_type infrastructure to ibmebus
  drivercore/dt: add a match table pointer to struct device
  dt: Typo fix.
  altera_ps2: Add devicetree support
  ...
2011-03-16 17:28:10 -07:00
Ben Dooks ead9a638c8 Merge branches 'for-2639/i2c/i2c-tegra', 'for-2639/i2c/i2c-mpc' and 'for-2639/i2c/i2c-imx' into for-linus/2639/i2c-1 2011-03-16 20:59:01 +00:00
Linus Torvalds d10902812c Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits)
  x86: Clean up apic.c and apic.h
  x86: Remove superflous goal definition of tsc_sync
  x86: dt: Correct local apic documentation in device tree bindings
  x86: dt: Cleanup local apic setup
  x86: dt: Fix OLPC=y/INTEL_CE=n build
  rtc: cmos: Add OF bindings
  x86: ce4100: Use OF to setup devices
  x86: ioapic: Add OF bindings for IO_APIC
  x86: dtb: Add generic bus probe
  x86: dtb: Add support for PCI devices backed by dtb nodes
  x86: dtb: Add device tree support for HPET
  x86: dtb: Add early parsing of IO_APIC
  x86: dtb: Add irq domain abstraction
  x86: dtb: Add a device tree for CE4100
  x86: Add device tree support
  x86: e820: Remove conditional early mapping in parse_e820_ext
  x86: OLPC: Make OLPC=n build again
  x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection
  x86: OLPC: Cleanup config maze completely
  x86: OLPC: Hide OLPC_OPENFIRMWARE config switch
  ...

Fix up conflicts in arch/x86/platform/ce4100/ce4100.c
2011-03-15 20:01:36 -07:00
Kumar Gala 0724d46417 i2c-mpc: Add support for 64bit system
Currently i2c-mpc supports 32bit system only, this modification makes it
supported on both 32-bit and 64-bit systems.  The P5020 is the first
64-bit PPC system with the i2c-mpc controller.

Based in patch from Xulei <B33228@freescale.com>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-16 00:34:04 +00:00
Wolfram Sang 6dbc2f35ab i2c-eg20t: include slab.h for memory allocations
Fixes (with v2.6.38-rc3/parisc/parisc-allmodconfig):
  src/drivers/i2c/busses/i2c-eg20t.c:720: error: implicit declaration of function 'kzalloc'
  src/drivers/i2c/busses/i2c-eg20t.c:790: error: implicit declaration of function 'kfree'

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-08 23:13:30 +00:00
Grant Likely 12c383238d i2c-ocores: Fix pointer type mismatch error
ocores_i2c_of_probe needs to use a const __be32 type for handing
device tree property values.  This patch fixed the following build
warning:

 CC      drivers/i2c/busses/i2c-ocores.o
  drivers/i2c/busses/i2c-ocores.c: In function 'ocores_i2c_of_probe':
  drivers/i2c/busses/i2c-ocores.c:254: warning: assignment discards qualifiers from pointer target type
  drivers/i2c/busses/i2c-ocores.c:261: warning: assignment discards qualifiers from pointer target type

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: linux-i2c@vger.kernel.org
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-08 22:57:51 +00:00
Rajendra Nayak 120bdaa47c i2c-omap: Program I2C_WE on OMAP4 to enable i2c wakeup
For the I2C module to be wakeup capable, programming I2C_WE register (which
was skipped for OMAP4430) is needed even on OMAP4.

This fixes i2c controller timeouts which were seen recently with the static
dependency being cleared between MPU and L4PER clockdomains.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[ben-linux@fluff.org: re-flowed description]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-07 09:53:38 +00:00
Tomoya MORINAGA 173442f278 i2c-eg20t: support new device OKI SEMICONDUCTOR ML7213 IOH
Support new device OKI SEMICONDUCTOR ML7213 IOH.
The ML7213 which is for IVI(In-Vehicle Infotainment) is a companion
chip for the Atom E6xx series and compatible with the Intel EG20T
PCH.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-03-02 00:36:13 +00:00
Grant Likely 1c48a5c93d dt: Eliminate of_platform_{,un}register_driver
Final step to eliminate of_platform_bus_type.  They're all just
platform drivers now.

v2: fix type in pasemi_nand.c (thanks to Stephen Rothwell)

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-28 13:22:46 -07:00
Wolfram Sang a8da7fecb6 i2c: add driver for Freescale i.MX28
Currently only supporting the PIOQUEUE-mode, because DMA-support for
this platform is not yet in mainline. When it becomes available and
support has been added to this driver, it will also be suitable for
i.MX23 and STMP3xxx.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23 01:00:11 +00:00
Colin Cross db811ca0f4 i2c: tegra: Add i2c support
Adds I2C bus driver for nVidia Tegra SoCs.  Tegra includes 4 I2C
controllers, one of which is inside the Dynamic Voltage Controller
and has a slightly different register map.

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23 00:53:26 +00:00
Ben Dooks a5a595cc36 i2c-omap: fixup commit cb527ede1b whitespace
Fixup the whitespace error noticed in cb527ede1b

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23 00:43:55 +00:00
Richard woodruff cb527ede1b i2c-omap: Double clear of ARDY status in IRQ handler
This errata occurs when the ARDY interrupt generation is enabled.
At the begining of every new transaction the ARDY interrupt is cleared.

On continuous i2c transactions where after clearing the ARDY bit from
I2C_STAT register (clearing the interrupt), the IRQ line is reasserted and the
I2C_STAT[ARDY] bit set again on 1. In fact, the ARDY status bit is not cleared
at the write access to I2C_STAT[ARDY] and only the IRQ line is deasserted and
then reasserted. This is not captured in the usual errata documents.

The workaround is to have a double clear of ARDY status in irq handler.

Signed-off-by: Richard woodruff <r-woodruff2@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23 00:42:36 +00:00
Balaji T K f72487e7a1 i2c-omap: fix build for !CONFIG_SUSPEND
fix the build break when !CONFIG_SUSPEND

drivers/i2c/busses/i2c-omap.c:1173: error: lvalue required as unary '&' operand
make[3]: *** [drivers/i2c/busses/i2c-omap.o] Error 1
make[2]: *** [drivers/i2c/busses] Error 2
make[1]: *** [drivers/i2c] Error 2
make: *** [drivers] Error 2

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23 00:39:45 +00:00
Kevin Hilman adf6e07922 i2c-omap: fix static suspend vs. runtime suspend
When runtime PM is enabled, each OMAP i2c device is suspended after
each i2c xfer.  However, there are two cases when the static suspend
methods must be used to ensure the devices are suspended:

1) runtime PM is disabled, either at compile time or dynamically
    via /sys/devices/.../power/control.
2) an i2c client driver uses i2c during it's suspend callback, thus
   leaving the i2c driver active (NOTE: runtime suspend transitions are
   disabled during system suspend, so i2c activity during system
   suspend will runtime resume the device, but not runtime (re)suspend it.)

Since the actual work to suspend the device is handled by the
subsytem, call the bus methods to take care of it.

NOTE: This takes care of a known suspend problem on OMAP3 where the
TWL RTC driver does i2c xfers during its suspend path leaving the i2c
driver in an active state (since runtime suspend transistions are
disabled.)

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-22 23:53:44 +00:00
Wolfram Sang f10820e495 i2c-stu300: make sure adapter-name is terminated
Use strlcpy instead of strncpy.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-22 23:53:44 +00:00
Guenter Roeck 335d7c58fc i2c/busses: Add support for Diolan U2C-12 USB-I2C adapter
This patch adds support for the Diolan U2C-12 USB-I2C adapter.
It also updates MAINTAINERS to list the author as maintainer.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-27 00:39:30 +00:00
Grant Likely c9e358dfc4 driver-core: remove conditionals around devicetree pointers
Having conditional around the of_match_table and the of_node pointers
turns out to make driver code use ugly #ifdef blocks.  Drop the
conditionals and remove the #ifdef blocks from the affected drivers.

Also tidy up minor whitespace issues within the same hunks.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-01-21 09:24:48 -07:00
Mark Brown f4e8db31a8 i2c: Encourage move to dev_pm_ops by warning on use of legacy methods
Since the PM core wishes to transition away from the legacy suspend
and resume methods and since removing them makes using PM core features
like runtime PM much easier start warning when a driver is registered
using the legacy methods.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-14 22:03:50 +01:00
Mark Brown d529de2994 i2c: Factor out runtime suspend checks from PM operations
When devices use dev_pm_ops the I2C API is implementing standard functionality
for integration with runtime PM and for checking for the presence of a per
device op. The PM core provides pm_generic_ functions implementing this
behaviour - use them to reduce coupling with future PM updates.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-14 22:03:49 +01:00
Jean Delvare 5219bf884b i2c: Unregister dummy devices last on adapter removal
Remove real devices first and dummy devices last. This gives device
driver which instantiated dummy devices themselves a chance to clean
them up before we do.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Hans Verkuil <hverkuil@xs4all.nl>
Cc: stable@kernel.org
2011-01-14 22:03:49 +01:00
Andres Salomon de8255ccd2 i2c: Convert SCx200 driver from using raw PCI to platform device
The SCx200 ACB driver supports ISA hardware as well as PCI.  The PCI
hardware is CS5535/CS5536 based, and the device that it grabs is handled by
the cs5535-mfd driver. This converts the SCx200 driver to use a
platform_driver rather than the previous PCI hackery.

The driver used to manually track the iface list (via linked list); now it
only does this for ISA devices.  PCI ifaces are handled through standard
driver model lists.

It's unclear what happens in case of errors in the old ISA code; rather than
pretending the code actually cares, I've dropped the (implicit) ignorance
of return values and marked it with a comment.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-01-14 12:38:15 +01:00
Linus Torvalds fe3c560b8a Merge branch 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux
* 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux:
  i2c-bfin-twi: move setup to the earlier subsys initcall
  i2c-bfin-twi: handle faulty slave devices better
  i2c-mv64xxx: send repeated START between messages in xfer
  i2c-nomadik: fix regression on adapter name
  i2c-omap: Set latency requirements only once for several messages
  i2c-eg20t: add driver for Intel EG20T
  i2c-ocores: add some device tree documentation
  i2c-ocores: Use devres for resource allocation
  i2c-ocores: Adapt for device tree
  i2c-iop3xx: add iomem annotation
2011-01-13 10:40:57 -08:00
Linus Torvalds 008d23e485 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
  Documentation/trace/events.txt: Remove obsolete sched_signal_send.
  writeback: fix global_dirty_limits comment runtime -> real-time
  ppc: fix comment typo singal -> signal
  drivers: fix comment typo diable -> disable.
  m68k: fix comment typo diable -> disable.
  wireless: comment typo fix diable -> disable.
  media: comment typo fix diable -> disable.
  remove doc for obsolete dynamic-printk kernel-parameter
  remove extraneous 'is' from Documentation/iostats.txt
  Fix spelling milisec -> ms in snd_ps3 module parameter description
  Fix spelling mistakes in comments
  Revert conflicting V4L changes
  i7core_edac: fix typos in comments
  mm/rmap.c: fix comment
  sound, ca0106: Fix assignment to 'channel'.
  hrtimer: fix a typo in comment
  init/Kconfig: fix typo
  anon_inodes: fix wrong function name in comment
  fix comment typos concerning "consistent"
  poll: fix a typo in comment
  ...

Fix up trivial conflicts in:
 - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c)
 - fs/ext4/ext4.h

Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
2011-01-13 10:05:56 -08:00
Ben Dooks dad92924ea Merge branch 'for-2638/i2c/bfin2' into for-linus/i2c-2638 2011-01-12 22:26:12 +00:00
Ben Dooks adeaf46d31 Merge branch 'for-2638/i2c/nomadik' into for-linus/i2c-2638 2011-01-12 22:25:32 +00:00
Ben Dooks 428dcc1937 Merge branch 'for-2638/i2c/intel' into for-linus/i2c-2638 2011-01-12 22:24:56 +00:00
Ben Dooks c5ba47ba7f Merge branch 'for-2638/i2c/ocores' into for-linus/i2c-2638 2011-01-12 22:24:51 +00:00
Ben Dooks 084b7c8383 Merge branch 'for-2638/i2c/iop' into for-linus/i2c-2638 2011-01-12 22:24:46 +00:00
Ben Dooks 7f42f9fef7 Merge branch 'for-2638/i2c/omap' into for-linus/i2c-2638 2011-01-12 22:24:36 +00:00
Ben Dooks cc3feac346 Merge branch 'for-2638/i2c/mv64xx' into for-linus/i2c-2638 2011-01-12 22:24:30 +00:00
Michael Hennerich 74f56c4ad4 i2c-bfin-twi: move setup to the earlier subsys initcall
Some systems using this bus sometimes have very basic devices such as
regulators on the bus, so the I2C bus master needs to be loaded early.
This also matches the behavior of many other I2C bus master drivers.
Therefore initialize via subsys_initcall().

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-12 22:23:08 +00:00
Michael Hennerich 540ac5553e i2c-bfin-twi: handle faulty slave devices better
Faulty slave devices might drive SDA low after a transfer finishes.  So,
when this scenario is detected, have the master generate up to 9 extra
clocks until the SDA is properly released.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-12 22:23:05 +00:00
Jean Delvare 0cc43a1806 i2c: Constify i2c_client where possible
Helper functions for I2C and SMBus transactions don't modify the
i2c_client that is passed to them, so it can be marked const.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:23 +01:00
Jean Delvare af5a60baae i2c-algo-bit: Complain about masters which can't read SCL
The I2C specification explicitly describes both SDA and SCL as
bidirectional lines. An I2C master with a read-only SCL is thus not
compliant. If a slow slave stretches the clock, errors will happen,
so the bus can't be considered as reliable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:23 +01:00
Jean Delvare f451171c5a i2c-algo-bit: Refactor adapter registration
Use a function pointer to decide whether to call i2c_add_adapter or
i2c_add_numbered_adapter. This makes the code more compact than the
current strategy of having the common code in a separate function.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:23 +01:00
Peter Korsgaard 92ed1a76ca i2c: Add generic I2C multiplexer using GPIO API
Add an i2c mux driver providing access to i2c bus segments using a
hardware MUX sitting on a master bus and controlled through gpio pins.

E.G. something like:

  ----------              ----------  Bus segment 1   - - - - -
 |          | SCL/SDA    |          |-------------- |           |
 |          |------------|          |
 |          |            |          | Bus segment 2 |           |
 |  Linux   | GPIO 1..N  |   MUX    |---------------   Devices
 |          |------------|          |               |           |
 |          |            |          | Bus segment M
 |          |            |          |---------------|           |
  ----------              ----------                  - - - - -

SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M
according to the settings of the GPIO pins 1..N.

Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:23 +01:00
Joe Perches b18a5c80eb i2c-nforce2: Remove unnecessary cast of pci_get_drvdata
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:22 +01:00
Ben Hutchings 665a96b70b i2c-i801: Include <linux/slab.h>
Commit 5a0e3ad6af added direct inclusion
of <linux/slab.h> to those source files that appeared to need it, but
somehow missed this.  On most architectures <linux/slab.h> is still
indirectly included, but there are exceptions such as alpha.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10 22:11:22 +01:00
Rodolfo Giometti eda6bee6c7 i2c-mv64xxx: send repeated START between messages in xfer
As stated into file include/linux/i2c.h we must send a repeated START
between messages in the same xfer groupset:

 * Except when I2C "protocol mangling" is used, all I2C adapters implement
 * the standard rules for I2C transactions.  Each transaction begins with a
 * START.  That is followed by the slave address, and a bit encoding read
 * versus write.  Then follow all the data bytes, possibly including a byte
 * with SMBus PEC.  The transfer terminates with a NAK, or when all those
 * bytes have been transferred and ACKed.  If this is the last message in a
 * group, it is followed by a STOP.  Otherwise it is followed by the next
 * @i2c_msg transaction segment, beginning with a (repeated) START.

Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Mauro Barella <mbarella@vds-it.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:19:43 +00:00
Linus Walleij 6d779a4c3f i2c-nomadik: fix regression on adapter name
The Nomadik I2C adapter does not provide a name for the struct
passed into i2c_add_numbered_adapter() causing a regression on
2.6.37-rc3 due to commit 2236baa75f
adding sanity checks for adapters. Fix this by providing a name
proper.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:17:55 +00:00
Samu Onkalo 6a91b55864 i2c-omap: Set latency requirements only once for several messages
Ordinary I2C read consist of two messages. First a write operation
to tell register address and then read operation to get data.
CPU wake up latency is set and removed twice in read case.
Set latency requirement before the message processing loop
and remove the requirement after the loop to remove latency
adjustment operations between the messages.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:16:53 +00:00
Tomoya MORINAGA e9bc8fa5df i2c-eg20t: add driver for Intel EG20T
I2C driver for Intel EG20T PCH

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Reviewed-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Qi Wang <qi.wang@intel.com>
[ben-linux@fluff.org: reworded commit message]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:08:36 +00:00
Jonas Bonn d9240e612b i2c-ocores: add some device tree documentation
This puts some documentation for the device tree configuration at the head
of the driver file.  Hopefully this can get moved to a common area for this
type of documentation at a later date; unfortunately, there isn't really
such a place in the kernel tree at this time.

Furthermore, the regstep and clock-frequency parameters are really bus
parameters and should probably be passed to the driver in a better way.
Consider that a TODO.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:04:29 +00:00
Jonas Bonn 47def5b80f i2c-ocores: Use devres for resource allocation
This patch converts the i2c-cores driver to use devres routines for
resource allocation.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:04:23 +00:00
Jonas Bonn 049bb69d82 i2c-ocores: Adapt for device tree
This patch adapts the i2c-ocores driver for being defined and configured via
a device tree description.

The device tree bits need to be protected by CONFIG_OF guards as this is
still an optional feature.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 01:04:18 +00:00
Aaro Koskinen 747fcc91cb i2c-iop3xx: add iomem annotation
Eliminate unnecessary casts and the following sparse warnings:

	drivers/i2c/busses/i2c-iop3xx.c:65:9: warning: incorrect type in argument 1 (different base types)
	drivers/i2c/busses/i2c-iop3xx.c:65:9:    expected void const volatile [noderef] <asn:2>*<noident>
	drivers/i2c/busses/i2c-iop3xx.c:65:9:    got unsigned int

	[ the previous warning is repeated 18 times ]

	drivers/i2c/busses/i2c-iop3xx.c:456:33: warning: cast removes address space of expression

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04 00:53:37 +00:00
Jiri Kosina 4b7bd36470 Merge branch 'master' into for-next
Conflicts:
	MAINTAINERS
	arch/arm/mach-omap2/pm24xx.c
	drivers/scsi/bfa/bfa_fcpim.c

Needed to update to apply fixes for which the old branch was too
outdated.
2010-12-22 18:57:02 +01:00
Benoit Cousson f7bb0d9ab2 I2C: i2c-omap: Change device name: i2c_omap -> omap_i2c
The convention for omap device naming is omap_XXX.

Rename the device and driver name in order to stick
to this naming convention.

Change device name in clock nodes as well.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Ben Dooks <ben-i2c@fluff.org>
Acked-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-20 17:53:04 -08:00
Tony Lindgren fea83f6a9b Merge branch 'devel-board' into omap-for-linus 2010-12-17 15:14:02 -08:00
Alan Cox 54efdfeb49 i2c_intel_mid: Fix slash in sysfs name
This gets caught by the new sanity check code. Instead of the slash use a
different symbol. This was originally found by Major Lee who proposed a
rather more complex patch which changed the name according to the chip
type.

On the basis that we are in a late -rc and making Linus grumpy isn't always
a good idea (however fun) this is a simple alternative.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-14 18:46:01 -08:00
Tony Lindgren 67b738ef32 Merge branch 'devel-omap-irq' into omap-for-linus 2010-12-10 09:44:39 -08:00
Tony Lindgren 55a4e78952 Merge branch 'pm-hwmod-i2c' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus 2010-11-30 14:45:49 -08:00
Arnaud Lacombe c38bd4ffc7 i2c/algos: convert Kconfig to use the menu's `visible' keyword
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-11-22 11:27:35 -02:00
Arnaud Lacombe dfc518dd6b Revert "i2c: Fix Kconfig dependencies"
This reverts commit 0a57274ea0.

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-11-22 11:27:33 -02:00
Jean Delvare 2236baa75f i2c: Sanity checks on adapter registration
Make sure I2C adapters being registered have the required struct
fields set. If they don't, problems will happen later.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-11-15 22:40:38 +01:00
Jean Delvare e1e18ee1cb i2c: Mark i2c_adapter.id as deprecated
It's about time to make it clear that i2c_adapter.id is deprecated.
Hopefully this will remind the last user to move over to a different
strategy.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
2010-11-15 22:40:38 +01:00
Rajendra Nayak 27b1fec2ca OMAP: I2C: Convert i2c driver to use PM runtime api's
This patch converts the i2c driver to use PM runtime apis

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-11-09 09:31:10 -08:00
Uwe Kleine-König b595076a18 tree-wide: fix comment/printk typos
"gadget", "through", "command", "maintain", "maintain", "controller", "address",
"between", "initiali[zs]e", "instead", "function", "select", "already",
"equal", "access", "management", "hierarchy", "registration", "interest",
"relative", "memory", "offset", "already",

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-11-01 15:38:34 -04:00
David Woodhouse 55fee8d7f7 i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllers
These are the extra 'Integrated Device Function' SMBus controllers found
on the Patsburg chipset. Mention the absence of slave mode support.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31 21:07:00 +01:00
David Woodhouse 0cd96eb0a7 i2c-i801: Handle multiple instances instead of keeping global state
It's poor form to keep driver state in global variables rather than
per-instance. It never really mattered in practice when there was only
one controller on the chipset, but the latest chipsets do have more
than one controller, so now we care.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31 21:06:59 +01:00
Seth Heasley e30d9859cf i2c-i801: Add Intel Patsburg device ID
Add support for the Intel Patsburg PCH SMBus Controller.

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31 21:06:59 +01:00
Linus Torvalds 44234d0c46 Merge branch 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linux
* 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linux:
  i2c-intel-mid: Driver depends on PCI
  i2c-intel-mid: support for Moorestown and Medfield platform
  i2c-nomadik: fixup bus delays
  i2c-nomadik: support smbus emulation
  i2c-nomadik: dynamic clocking
  i2c-nomadik: documentation fixes
  i2c-s3c2410: Enable i2c clock only when doing some transfert
2010-10-29 16:15:57 -07:00
Randy Dunlap 9cc11dee3d i2c-intel-mid: Driver depends on PCI
i2c-intel-mid driver uses PCI data structs and interfaces,
so it should depend on PCI.  Fixes these build errors:

drivers/i2c/busses/i2c-intel-mid.c:977: error: implicit declaration of function 'pci_request_region'
drivers/i2c/busses/i2c-intel-mid.c:1077: error: implicit declaration of function 'pci_release_region'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ba Zheng <zheng.ba@intel.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: linux-i2c@vger.kernel.org
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-29 23:51:28 +01:00
Linus Torvalds e9f29c9a56 Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits)
  x86: allocate space within a region top-down
  x86: update iomem_resource end based on CPU physical address capabilities
  x86/PCI: allocate space from the end of a region, not the beginning
  PCI: allocate bus resources from the top down
  resources: support allocating space within a region from the top down
  resources: handle overflow when aligning start of available area
  resources: ensure callback doesn't allocate outside available space
  resources: factor out resource_clip() to simplify find_resource()
  resources: add a default alignf to simplify find_resource()
  x86/PCI: MMCONFIG: fix region end calculation
  PCI: Add support for polling PME state on suspended legacy PCI devices
  PCI: Export some PCI PM functionality
  PCI: fix message typo
  PCI: log vendor/device ID always
  PCI: update Intel chipset names and defines
  PCI: use new ccflags variable in Makefile
  PCI: add PCI_MSIX_TABLE/PBA defines
  PCI: add PCI vendor id for STmicroelectronics
  x86/PCI: irq and pci_ids patch for Intel Patsburg DeviceIDs
  PCI: OLPC: Only enable PCI configuration type override on XO-1
  ...
2010-10-28 11:59:52 -07:00
Ben Dooks e0b11c3c38 Merge branch 'for-2637/i2c/samsung' into next-i2c 2010-10-28 10:07:14 +01:00
Ben Dooks 3751638549 Merge branch 'for-2637/i2c/i2c-nomadik' into next-i2c 2010-10-28 10:07:08 +01:00
Alan Cox aa62f85d0c i2c-intel-mid: support for Moorestown and Medfield platform
(Updated to address Ben's comments. With regard to the message segment
 restriction it's not something we hit on the actual platform so while
 I will investigate that further I don't think its a blocker to submission.
 At worst its a spot over-restrictive)

From: Wen Wang <wen.w.wang@intel.com>

Initial release of the driver. Updated and verified on hardware.

Cleaned up as follows

Alan Cox:
   Squash down the switches into tables, and use the PCI ident field. We
   could perhaps take this further and put the platform and port number into
   this.
   uint32t -> u32
   bracketing of case statements
   spacing and '!' usage
   Check the speed (which is now 0/1/2) is valid and ignore otherwise.
   Fix remaining problems/suggestions from Jean's review
   Fix items from Ben's review

Arjan van de Ven:
   Initial power management hooks

Yong Wang <youg.y.wang@intel.com>:
   Shared IRQ support

Wen Wang <wen.w.wang@intel.com>:
   D3 support
   Fixes for OCT test runs
   Interrupt optimisations

Hong Liu <hong.liu@intel.com>
   The runtime PM code is working on the wrong device (i2c_adapter->dev).
   The correct one should be pci_dev->dev. This breaks attached i2c
   slave devices with runtime PM enabled. Slave device needs to runtime
   resume parent device before runtime resuming itself, but we always get
   error since we don't have pm_runtime callback for i2c_adapter->dev.

Bin Yang <bin.yang@intel.com>:
   Update speed table

Saadi Maalem <saadi.maalem@intel.com>:
   Clear all interrupts in the hardware init

Celine Chotard <celinex.chotard@intel.com>:
   Correct ordering of clear/disable of IRQs

Signed-off-by: Wen Wang <wen.w.wang@intel.com>
Signed-off-by: Yong Wang <yong.y.wang@intel.com>
Signed-off-by: Hong Liu <hong.liu@intel.com>
Signed-off-by: Bin Yang <bin.yang@intel.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-28 10:05:08 +01:00
Dzianis Kahanovich 87acf5ad87 NULL-terminate all pci_device_id tables
NULL-terminating pci_device_id in pch_dma.c and scx200_acb.c
for appying MODULE_DEVICE_TABLE (to publish modalias-es).

Signed-off-by: Dzianis Kahanovich <mahatma@eu.by>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-10-27 20:33:05 +10:30
Linus Torvalds 1dfd166e93 Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (110 commits)
  sh: i2c-sh7760: Replase from ctrl_* to __raw_*
  sh: clkfwk: Shuffle around to match the intc split up.
  sh: clkfwk: modify for_each_frequency end condition
  sh: fix clk_get() error handling
  sh: clkfwk: Fix fault in frequency iterator.
  sh: clkfwk: Add a helper for rate rounding by divisor ranges.
  sh: clkfwk: Abstract rate rounding helper.
  sh: clkfwk: support clock remapping.
  sh: pci: Convert to upper/lower_32_bits() helpers.
  sh: mach-sdk7786: Add support for the FPGA SRAM.
  sh: Provide a generic SRAM pool for tiny memories.
  sh: pci: Support secondary FPGA-driven PCIe clocks on SDK7786.
  sh: pci: Support slot 4 routing on SDK7786.
  sh: Fix up PMB locking.
  sh: mach-sdk7786: Add support for fpga gpios.
  sh: use pr_fmt for clock framework, too.
  sh: remove name and id from struct clk
  sh: free-without-alloc fix for sh_mobile_lcdcfb
  sh: perf: Set up perf_max_events.
  sh: perf: Support SH-X3 hardware counters.
  ...

Fix up trivial conflicts (perf_max_events got removed) in arch/sh/kernel/perf_event.c
2010-10-25 07:51:49 -07:00
Nobuhiro Iwamatsu 8df399018d sh: i2c-sh7760: Replase from ctrl_* to __raw_*
ctrl_* is deprecated. We should to use __raw_*.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-10-25 10:44:19 +09:00
Linus Walleij f868fc355a i2c-nomadik: fixup bus delays
We were missing a transfer delay in one execution path leading to
hangs and the bus timeout was too low leading to errors under
stress tests.

Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-25 02:40:48 +01:00
Linus Walleij 5680bc6ec7 i2c-nomadik: support smbus emulation
We can do smbus emulation so flag this and drop the duplicate
flags implied from smbus emulation.

Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-25 02:40:43 +01:00
Linus Walleij 8ef4f4e4af i2c-nomadik: dynamic clocking
This makes sure the Nomadik I2C bus driver silicon is only clocked
when really needed, saving some microamps here and there when
there is no I2C traffic.

Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-25 02:40:38 +01:00
Linus Walleij 1804edd15c i2c-nomadik: documentation fixes
This fixes some kerneldoc and assorted documenatation in the
Nomadik I2C driver without semantic impact.

Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-25 02:40:32 +01:00
Jean Delvare bf5d95c826 i2c-viapro: Don't log nacks
Transactions not acked can happen every now and then, in particular
during device detection, and various transaction types can be used for
this purpose. So stop logging this event, except when debugging is
enabled. This is what other similar drivers (e.g. i2c-i801 or
i2c-piix4) do.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:59 +02:00
Guenter Roeck db79f2a1d2 i2c/pca954x: Remove __devinit and __devexit from probe and remove functions
The underlying I2C adapter may or may not be present when this driver
gets initialized, and may disappear later, so there is no safe time at
which the probe and remove functions can be discarded.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:59 +02:00
Guenter Roeck ae63b13bbe i2c/mux: Driver for PCA9541 I2C Master Selector
This patch adds support for PCA9541, an I2C Bus Master Selector.
The driver is modeled as single channel I2C Multiplexer to be able to utilize
the I2C multiplexer framework.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:58 +02:00
Jean Delvare 51b54ba9bb i2c: Optimize function i2c_detect()
Check the class flags before allocating the temporary i2c_client
structure, to avoid allocating it when we don't need it.

Also optimize the inner loop a bit.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
2010-10-24 18:16:58 +02:00
Jean Delvare d57558d0f3 i2c: Discard warning message on device instantiation from user-space
The "new_device" sysfs interface has been there for quite some time
now, nobody complained about it so it must be good enough. Time to
remove the warning and call it stable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
2010-10-24 18:16:58 +02:00
Julia Lawall 9cb2c2726e i2c-amd8111: Add proper error handling
The functions the functions amd_ec_wait_write and amd_ec_wait_read have an
unsigned return type, but return a negative constant to indicate an error
condition.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Fixing amd_ec_wait_write and amd_ec_wait_read leads to the need to adjust
the return type of the functions amd_ec_write and amd_ec_read, which are
the only functions that call amd_ec_wait_write and amd_ec_wait_read.
amd_ec_write and amd_ec_read, in turn, are only called from within the
function amd8111_access, which already returns a signed typed value.  Each
of the calls to amd_ec_write and amd_ec_read are updated using the
following semantic patch:

// <smpl>
@@
@@

+ status = amd_ec_write
- amd_ec_write
  (...);
+ if (status) return status;

@@
@@

+ status = amd_ec_read
- amd_ec_read
  (...);
+ if (status) return status;
// </smpl>

The patch also adds the declaration of the status variable.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:58 +02:00
matt mooney ef9d9b8fb6 i2c: Change to new flag variable
Replace EXTRA_CFLAGS with ccflags-y.

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:58 +02:00
Jean Delvare a8d7be818f i2c: Remove unneeded inclusions of <linux/i2c-id.h>
These drivers don't use anything which is defined in <linux/i2c-id.h>.
This header file was never meant to be included directly anyway, and
will be deleted soon.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Acked-by: Dave Airlie <airlied@linux.ie>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
2010-10-24 18:16:58 +02:00
Jean Delvare 97cc4d49cf i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
This makes the calling site's code clearer IMHO.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
2010-10-24 18:16:57 +02:00
Nobuhiro Iwamatsu 323584436d i2c-pca-platform: Change device name of request_irq
i2c->adap.name shouldn't be used in request_irq.
Instead the driver name "i2c-pca-platform" should be used.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-24 18:16:57 +02:00
Jean Delvare 0a57274ea0 i2c: Fix Kconfig dependencies
drivers/i2c/algos/Kconfig makes all the algorithms dependent on
!I2C_HELPER_AUTO, which triggers a Kconfig warning about broken
dependencies when some driver selects one of the algorithms. Ideally
we would make only the prompts dependent on !I2C_HELPER_AUTO, however
Kconfig doesn't currently support that. So we have to redefine the
symbols separately for the I2C_HELPER_AUTO=y case.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michal Marek <mmarek@suse.cz>
2010-10-24 18:16:57 +02:00
Linus Torvalds d4429f608a Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (71 commits)
  powerpc/44x: Update ppc44x_defconfig
  powerpc/watchdog: Make default timeout for Book-E watchdog a Kconfig option
  fsl_rio: Add comments for sRIO registers.
  powerpc/fsl-booke: Add e55xx (64-bit) smp defconfig
  powerpc/fsl-booke: Add p5020 DS board support
  powerpc/fsl-booke64: Use TLB CAMs to cover linear mapping on FSL 64-bit chips
  powerpc/fsl-booke: Add support for FSL Arch v1.0 MMU in setup_page_sizes
  powerpc/fsl-booke: Add support for FSL 64-bit e5500 core
  powerpc/85xx: add cache-sram support
  powerpc/85xx: add ngPIXIS FPGA device tree node to the P1022DS board
  powerpc: Fix compile error with paca code on ppc64e
  powerpc/fsl-booke: Add p3041 DS board support
  oprofile/fsl emb: Don't set MSR[PMM] until after clearing the interrupt.
  powerpc/fsl-booke: Add PCI device ids for P2040/P3041/P5010/P5020 QoirQ chips
  powerpc/mpc8xxx_gpio: Add support for 'qoriq-gpio' controllers
  powerpc/fsl_booke: Add support to boot from core other than 0
  powerpc/p1022: Add probing for individual DMA channels
  powerpc/fsl_soc: Search all global-utilities nodes for rstccr
  powerpc: Fix invalid page flags in create TLB CAM path for PTE_64BIT
  powerpc/mpc83xx: Support for MPC8308 P1M board
  ...

Fix up conflict with the generic irq_work changes in arch/powerpc/kernel/time.c
2010-10-21 21:19:54 -07:00
Arnaud Patard (Rtp) d2360b8e84 i2c-s3c2410: Enable i2c clock only when doing some transfert
This patch modify the s3c2410 i2c driver behaviour to enable the
i2c clock only when needed. I'm not sure if this has a big impact
on power usage but at least it's fixing a bug with the uda1380
codec which needs to be hard reset'ed if the i2c clock is enabled
before it's powered on (at least on h1940).

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-21 23:43:27 +01:00
Seth Heasley cb04e95bdd PCI: update Intel chipset names and defines
This patch updates the defines for Intel devices in
include/linux/pci_ids.h, referenced in arch/x86/pci/irq.c and
drivers/i2c/busses/i2c-i801.c, reflecting approved legal branding, and
using fuller code-names for products under development.

Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-17 20:03:04 -07:00
Marc Kleine-Budde e39428d53d i2c-imx: do not allow interruptions when waiting for I2C to complete
The i2c_imx_trx_complete() function is using
wait_event_interruptible_timeout() to wait for the I2C controller to
signal that it has completed an I2C bus operation. If the process that
causes the I2C operation receives a signal, the wait will be
interrupted, returning an error. It is better to let the I2C operation
finished before handling the signal (i.e. returning into userspace).

It is safe to use wait_event_timeout() instead, because the timeout
will allow the process to exit if the I2C bus hangs. It's also better
to allow the I2C operation to finish, because unacknowledged I2C
operations can cause the I2C bus to hang.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-18 01:29:04 +01:00
Jon Povey c5b4afec8e i2c-davinci: Fix TX setup for more SoCs
This patch is an improvement to 4bba0fd8d1
which got to mainline a little early.

Sudhakar Rajashekhara explains that at least OMAP-L138 requires MDR mode
settings before DXR for correct behaviour, so load MDR first with
STT cleared and later load again with STT set.

Tested on DM355 connected to Techwell TW2836 and Wolfson WM8985

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Acked-by: Troy Kisky <troy.kisky@boundarydevices.com>
Tested-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-18 01:25:33 +01:00
Julia Lawall 8032214346 i2c/i2c-pasemi.c: Fix unsigned return type
The function has an unsigned return type, but returns a negative constant
to indicate an error condition.  The result of calling the function is
always stored in a variable of type (signed) int, and thus unsigned can be
dropped from the return type.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-10-13 16:19:04 +11:00
Linus Torvalds 5672bc8181 Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  of/i2c: Fix module load order issue caused by of_i2c.c
  i2c: Fix checks which cause legacy suspend to never get called
  i2c-pca: Fix waitforcompletion() return value
  i2c: Fix for suspend/resume issue
  i2c: Remove obsolete cleanup for clientdata
2010-10-07 13:44:30 -07:00
MyungJoo Ham 7031307aef i2c-s3c2410: fix calculation of SDA line delay
S3C2440 style I2C controller uses PCLK to calculate the SDA line delay.
The driver wrongly assumed that this delay is calculated from the
frequency that the controller is operating on. This patch fixes this
issue.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-10-01 00:00:35 +01:00
Grant Likely 925bb9c649 of/i2c: Fix module load order issue caused by of_i2c.c
Commit 959e85f7, "i2c: add OF-style registration and binding" caused a
module dependency loop where of_i2c.c calls functions in i2c-core, and
i2c-core calls of_i2c_register_devices() in of_i2c.  This means that
when i2c support is built as a module when CONFIG_OF is set, then
neither i2c_core nor of_i2c are able to be loaded.

This patch fixes the problem by moving the of_i2c_register_devices()
calls back into the device drivers.  Device drivers already
specifically request the core code to parse the device tree for
devices anyway by setting the of_node pointer, so it isn't a big
deal to also call the registration function.  The drivers just become
slightly more verbose.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-09-30 14:14:23 +02:00
Rajendra Nayak 64b4782fc9 i2c: Fix checks which cause legacy suspend to never get called
For devices which are not adapted to runtime PM a call to
pm_runtime_suspended always returns true.

Hence the pm_runtime_suspended checks below prevent legacy
suspend from getting called.

So do a pm_runtime_suspended check only for devices with a
dev_pm_ops populated (which hence do not rely on the legacy
suspend.)

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-09-30 14:14:22 +02:00
Yegor Yefremov 6abb930af0 i2c-pca: Fix waitforcompletion() return value
ret is still -1, if during the polling read_byte() returns at once
with I2C_PCA_CON_SI set. So ret > 0 would lead *_waitforcompletion()
to return 0, in spite of the proper behavior.

The routine was rewritten, so that ret has always a proper value,
before returning.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-09-30 14:14:22 +02:00
Vishwanath BS 753419f59e i2c: Fix for suspend/resume issue
In current i2c core driver, call to pm_runtime_set_active from
i2c_device_pm_resume will unconditionally enable i2c module and
increment child count of the parent. Because of this, in CPU Idle
path, i2c does not idle, preventing Core to enter retention. Also i2c
module will not be suspended upon system suspend as
pm_runtime_set_suspended is not called from i2c_device_pm_suspend.

This issue is fixed by removing pm_runtime_set_active call from resume
path which is not necessary.
This fix has been tested on OMAP4430.

Signed-off-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Vishwanath BS <vishwanath.bs@ti.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-09-30 14:14:22 +02:00
Jon Povey 4bba0fd8d1 i2c-davinci: Fix race when setting up for TX
When setting up to transmit, a race exists between the ISR and
i2c_davinci_xfer_msg() trying to load the first byte and adjust counters.
This is mostly visible for transmits > 1 byte long.

The hardware starts sending immediately that MDR is loaded. IMR trickery
doesn't work because if we start sending, finish the first byte and an
XRDY event occurs before we load IMR to unmask it, we never get an
interrupt, and we timeout.

Move the MDR load after DXR,IMR loads to avoid this race without locking.

Tested on DM355 connected to Techwell TW2836 and Wolfson WM8985

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-09-28 00:05:08 +01:00
Bernhard Walle cc33e54290 i2c-octeon: Return -ETIMEDOUT in octeon_i2c_wait() on timeout
It doesn't make sense to set result to -ETIMEDOUT but return 0 (success)
afterwards. Since there's code in octeon_i2c_start() to handle the
error, it should be called.

Signed-off-by: Bernhard Walle <walle@corscience.de>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-09-27 23:21:16 +01:00
Mathias Nyman 5c64eb26ed i2c-omap: Make sure i2c bus is free before setting it to idle
If the i2c bus receives an interrupt with both BB (bus busy) and
ARDY (register access ready) statuses set during the tranfer of the last message
the bus was put to idle while still busy.

This caused bus to timeout.

Signed-off-by: Mathias Nyman <mathias.nyman@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-09-22 01:06:58 +01:00
Paul Mundt bbcf6e8b66 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	arch/sh/include/asm/Kbuild
	drivers/Makefile

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-16 13:32:24 +09:00
Linus Torvalds d0a0c28cf1 Merge branch 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux
* 'for-linus/i2c-2636' of git://git.fluff.org/bjdooks/linux:
  i2c/nuc900: add i2c driver support for nuc900
  i2c: Enable NXP LPC support in Kconfig
  i2c-pxa: fix compiler warning, due to missing const
  i2c: davinci: bus recovery procedure to clear the bus
  i2c: davinci: Add cpufreq support
  i2c: davinci: Add suspend/resume support
  i2c: davinci: Add helper functions for power management
  i2c: davinci: misc. cleanups: remove MOD_REG_BIT and IO_ADDRESS usage
  i2c: davinci: Fix smbus Oops with AIC33 usage
2010-08-14 11:57:54 -07:00
Linus Torvalds 1c00650c23 Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c: I2C bus multiplexer driver pca954x
  i2c: Multiplexed I2C bus core support
  i2c: Use a separate mutex for userspace client lists
  i2c: Make i2c_default_probe self-sufficient
  i2c: Drop dummy variable
  i2c: Move adapter locking helpers to i2c-core
  V4L/DVB: Use custom I2C probing function mechanism
  i2c: Add support for custom probe function
  i2c-dev: Use memdup_user
  i2c-dev: Remove unnecessary kmalloc casts
2010-08-12 10:06:29 -07:00
Linus Torvalds 58d4ea65b9 Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6:
  mmc_spi: Fix unterminated of_match_table
  of/sparc: fix build regression from of_device changes
  of/device: Replace struct of_device with struct platform_device
2010-08-12 09:11:31 -07:00
Michael Lawnick 7f528135da i2c: I2C bus multiplexer driver pca954x
I2C driver for PCA954x I2C multiplexer series.

Signed-off-by: Michael Lawnick <ml.lawnick@gmx.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11 18:21:03 +02:00
Michael Lawnick 0826374bff i2c: Multiplexed I2C bus core support
Add multiplexed bus core support. I2C multiplexer and switches
like pca954x get instantiated as new adapters per port.

Signed-off-by: Michael Lawnick <ml.lawnick@gmx.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11 18:21:02 +02:00
Jean Delvare dafc50d141 i2c: Use a separate mutex for userspace client lists
Moving userspace-instantiated clients to separate lists wasn't nearly
enough to avoid deadlocks in multiplexed bus cases. We also want to
have a dedicated mutex to protect each list.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Michael Lawnick <ml.lawnick@gmx.de>
2010-08-11 18:21:01 +02:00
Jean Delvare 8031d79bae i2c: Make i2c_default_probe self-sufficient
Make i2c_default_probe self-sufficient, so that callers don't have to
do functionality checks themselves. This ensures everything is and
will stay consistent.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11 18:21:00 +02:00
Jean Delvare d6703281ff i2c: Drop dummy variable
Now that bus_for_each_drv() is no longer __must_check, we can drop the
dummy variable that was used to store the returned value.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Justin P. Mattock <justinmattock@gmail.com>
2010-08-11 18:20:59 +02:00
Jean Delvare fe61e07e9e i2c: Move adapter locking helpers to i2c-core
Uninline i2c adapter locking helper functions, move them to i2c-core,
and use them in i2c-core itself. The functions are still exported for
external users. This makes future updates to the locking model (which
will be needed for multiplexing support) possible and transparent.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Michael Lawnick <ml.lawnick@gmx.de>
2010-08-11 18:20:58 +02:00
Jean Delvare d44f19d586 V4L/DVB: Use custom I2C probing function mechanism
Now that i2c-core offers the possibility to provide custom probing
function for I2C devices, let's make use of it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-11 18:20:57 +02:00
Jean Delvare 9a94241afc i2c: Add support for custom probe function
The probe method used by i2c_new_probed_device() may not be suitable
for all cases. Let the caller provide its own, optional probe
function.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-11 18:20:56 +02:00
Julia Lawall f1c2e33c29 i2c-dev: Use memdup_user
Use memdup_user when user data is immediately copied into the allocated
region.  Note that in the second case, the ++i is no longer necessary, as
the last value is already freed if needed by the call to memdup_user.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@

-  to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+  to = memdup_user(from,size);
   if (
-      to==NULL
+      IS_ERR(to)
                 || ...) {
   <+... when != goto l1;
-  -ENOMEM
+  PTR_ERR(to)
   ...+>
   }
-  if (copy_from_user(to, from, size) != 0) {
-    <+... when != goto l2;
-    -EFAULT
-    ...+>
-  }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11 18:20:55 +02:00
Joe Perches 35a56c5b82 i2c-dev: Remove unnecessary kmalloc casts
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11 18:20:54 +02:00
Ben Dooks f6e1901c4c Merge branch 'for-2636/i2c/nuc' into next-i2c 2010-08-11 00:35:25 +01:00
Ben Dooks d8a6206d4f Merge branch 'for-2636/i2c/nxp' into next-i2c 2010-08-11 00:35:22 +01:00
Ben Dooks c09202ac14 Merge branch 'for-2636/i2c/pxa' into next-i2c 2010-08-11 00:35:19 +01:00
Wan ZongShun ededad3e6f i2c/nuc900: add i2c driver support for nuc900
This patch is to add i2c driver support for nuc900.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.org>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Reviewed-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-08-11 00:34:38 +01:00
Kevin Wells c115167aef i2c: Enable NXP LPC support in Kconfig
NXP LPC series processors use the IP3204 I2C block shared with the
Philips PNX4008 processor.

Signed-off-by: Kevin Wells <wellsk40@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-08-11 00:30:24 +01:00
Marc Kleine-Budde 21e2ecfe19 i2c-pxa: fix compiler warning, due to missing const
This patch adds the missing const to "struct platform_device_id" to fix
this warning:

/home/frogger/pengutronix/linux/linux-2.6/drivers/i2c/busses/i2c-pxa.c:
In function 'i2c_pxa_probe':
/home/frogger/pengutronix/linux/linux-2.6/drivers/i2c/busses/i2c-pxa.c:1004:
warning: initialization discards qualifiers from pointer target type

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Roel Kluin <roel.kluin@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-08-11 00:28:23 +01:00
Ben Dooks e126613e67 Merge branch 'davinci-i2c' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci into for-2636/i2c/davinci 2010-08-09 14:30:24 +01:00
Russell King 2192482ee5 Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable
Conflicts:
	arch/arm/Kconfig
2010-08-09 14:07:19 +01:00
Russell King 500b9fc922 Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6 into devel-stable
Conflicts:
	drivers/net/irda/sh_irda.c
2010-08-06 18:13:19 +01:00
Grant Likely 2dc1158137 of/device: Replace struct of_device with struct platform_device
of_device is just an alias for platform_device, so remove it entirely.  Also
replace to_of_device() with to_platform_device() and update comment blocks.

This patch was initially generated from the following semantic patch, and then
edited by hand to pick up the bits that coccinelle didn't catch.

@@
@@
-struct of_device
+struct platform_device

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Reviewed-by: David S. Miller <davem@davemloft.net>
2010-08-06 09:25:50 -06:00
Linus Torvalds 03c0c29aff Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (63 commits)
  of/platform: Register of_platform_drivers with an "of:" prefix
  of/address: Clean up function declarations
  of/spi: call of_register_spi_devices() from spi core code
  of: Provide default of_node_to_nid() implementation.
  of/device: Make of_device_make_bus_id() usable by other code.
  of/irq: Fix endian issues in parsing interrupt specifiers
  of: Fix phandle endian issues
  of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string
  of: remove of_default_bus_ids
  of: make of_find_device_by_node generic
  microblaze: remove references to of_device and to_of_device
  sparc: remove references to of_device and to_of_device
  powerpc: remove references to of_device and to_of_device
  of/device: Replace of_device with platform_device in includes and core code
  of/device: Protect against binding of_platform_drivers to non-OF devices
  of: remove asm/of_device.h
  of: remove asm/of_platform.h
  of/platform: remove all of_bus_type and of_platform_bus_type references
  of: Merge of_platform_bus_type with platform_bus_type
  drivercore/of: Add OF style matching to platform bus
  ...

Fix up trivial conflicts in arch/microblaze/kernel/Makefile due to just
some obj-y removals by the devicetree branch, while the microblaze
updates added a new file.
2010-08-05 15:57:35 -07:00
Philby John 8574faf9a5 i2c: davinci: bus recovery procedure to clear the bus
Come out of i2c time out condition by following the
bus recovery procedure outlined in the i2c protocol v3 spec.
The kernel must be robust enough to gracefully recover
from i2c bus failure without having to reset the machine.
This is done by first NACKing the slave, pulsing the SCL
line 9 times and then sending the stop command.

This patch has been tested on a DM6446 and DM355

Signed-off-by: Philby John <pjohn@in.mvista.com>
Signed-off-by: Srinivasan, Nageswari <nageswari@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Chaithrika U S 82c0de11b7 i2c: davinci: Add cpufreq support
Add cpufreq support for DaVinci I2C driver.
Tested on DA850/OMAP-L138 EVM.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Chaithrika U S 68f15de976 i2c: davinci: Add suspend/resume support
Add suspend and resume callbacks to DaVinci I2C driver.
This has been tested on DA850/OMAP-L138 EVM.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Chaithrika U S 5ae5b1136e i2c: davinci: Add helper functions for power management
Add i2c reset control and clock divider calculation functions
which will be useful for power management features.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Chaithrika U S c062a2518d i2c: davinci: misc. cleanups: remove MOD_REG_BIT and IO_ADDRESS usage
Cleanup the DaVinci I2C driver. Remove MOD_REG_BIT macro.
Also use ioremap instead of IO_ADDRESS macro.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Dirk Behme c6c7c729a2 i2c: davinci: Fix smbus Oops with AIC33 usage
This fixes Oops at kernel startup while "scanning" for TLV320AIC23IDx
addresses.

Additional fix from Sudhakar Rajashekhara: I think 'first byte set'
should come after the write because an I2C transaction is being
carried out before configuring the I2C mode register (which has bits
to configure Master, Start condition etc), which causes undefined
behavior.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Alexander Vasiliev <alexvasiljev@gmail.com>
Signed-off-by: Brad Griffis <bgriffis@ti.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-08-05 09:38:32 -07:00
Naveen Krishna Ch 4b623926ba ARM: SAMSUNG: i2c/busses: Add HAVE_S3C2410_I2C option to include I2C for Samsung SoCs
This patch adds HAVE_S3C2410_I2C to control inclusion of I2C bus driver
on Samsung SoCs and makes I2C bus driver dependency SoC specific instead
of machine specific. This will enalbe all machines using Samsung ARCH_S3C2410,
_S3C64XX, _S5P6440, _S5PC100, and _S5PV210 to select the I2C driver by default

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-08-05 18:32:52 +09:00
Magnus Damm 82b20d8bae i2c: i2c-sh_mobile irq rollback fix
Update the i2c-sh_mobile driver to properly free
interrupts. The function sh_mobile_i2c_hook_irqs()
is fixed so module both unload and load are working
as expected.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04 16:10:34 +09:00
Paul Mundt 701ec7a7b0 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	arch/arm/configs/ap4evb_defconfig
	arch/arm/configs/g3evm_defconfig
	arch/arm/configs/g4evm_defconfig

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04 11:56:17 +09:00
Albrecht Dreß 0c2daaafcd powerpc/5200/i2c: improve i2c bus error recovery
This patch improves the recovery of the MPC's I2C bus from errors like bus
hangs resulting in timeouts:
1. make the bus timeout configurable, as it depends on the bus clock and
    the attached slave chip(s); default is still 1 second;
2. detect any of the cases indicated by the CF, BB and RXAK MSR flags if a
    timeout occurs, and add a missing (required) MAL reset;
3. use a more reliable method to fixup the bus if a hang has been detected.
    The sequence is sent 9 times which seems to be necessary if a slave
    "misses" more than one clock cycle.  For 400 kHz bus speed, the fixup is
    also ~70us (81us vs. 150us) faster.

Tested on a custom Lite5200b derived board, with a Dallas RTC, AD sensors
and NXP IO expander chips attached to the i2c.

Changes vs. v1:
- use improved bus fixup sequence for all chips (not only the 5200)
- calculate real clock from defaults if no clock is given in the device tree
- better description (I hope) of the changes.

I didn't split the changes in this file into three parts as recommended by
Grant, as they actually belong together (i.e. they address one single
problem, just in three places of one single source file).

Signed-off-by: Albrecht Dreß <albrecht.dress@arcor.de>
[grant.likely@secretlab.ca: fixup for ->node to ->dev.of_node transition]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-01 17:06:44 -06:00
Grant Likely 4e4f62bf73 Merge commit 'v2.6.35-rc6' into devicetree/next
Conflicts:
	arch/sparc/kernel/prom_64.c
2010-07-24 09:49:13 -06:00
Linus Torvalds 589643be66 Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: Fix autoloading of fschmd on recent Fujitsu machines
  hwmon: (coretemp) Properly label the sensors
  hwmon: (coretemp) Skip duplicate CPU entries
  hwmon: (it87) Fix in7 on IT8720F
  hwmon: (k8temp) Fix temperature reporting for ASB1 processor revisions
2010-07-11 13:35:34 -07:00
Guenter Roeck 102b59c6d6 i2c/mips: Fix error return codes from Sibyte i2c bus driver
Sibyte i2c bus driver returns non-descriptive error values.
Update to return error values as defined in Documentation/i2c/fault-codes.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-07-10 09:42:47 +02:00
Jean Delvare 827900c556 i2c: Fix probability check
The new unified probing function differs from the original code, and
the preliminary test whether probing is possible must be updated
accordingly.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-07-10 09:42:46 +02:00
Jean Delvare faabd47f7e hwmon: Fix autoloading of fschmd on recent Fujitsu machines
Fujitsu slightly changed the DMI strings in their recent machines,
(for example the D2778) and this breaks the automatic loading of the
needed fschmd driver. Being more tolerant on string comparison fixes
the issue.

This closes bug #15634:
https://bugzilla.kernel.org/show_bug.cgi?id=15634

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Sergey Spiridonov <sena@hurd.homeunix.org>
Cc: Hans de Goede <hdegoede@redhat.com>
2010-07-09 16:22:51 +02:00
Grant Likely 959e85f775 i2c: Add OF-style registration and binding
This patch adds OF hooks to the i2c core so that devices can automatically
be registered based on device tree data.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05 16:14:52 -06:00
Grant Likely 9fd049927c of/i2c: Generalize OF support
This patch cleans up the i2c OF support code to make it selectable by
all architectures and allow for automatic registration of i2c devices.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05 16:14:52 -06:00
Paul Mundt 285eba57db Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
	include/linux/serial_sci.h

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-07-05 15:46:08 +09:00
Wolfram Sang fbae3fb154 i2c: Remove all i2c_set_clientdata(client, NULL) in drivers
I2C drivers can use the clientdata-pointer to point to private data. As I2C
devices are not really unregistered, but merely detached from their driver, it
used to be the drivers obligation to clear this pointer during remove() or a
failed probe(). As a couple of drivers forgot to do this, it was agreed that it
was cleaner if the i2c-core does this clearance when appropriate, as there is
no guarantee for the lifetime of the clientdata-pointer after remove() anyhow.
This feature was added to the core with commit
e4a7b9b04d to fix the faulty drivers.

As there is no need anymore to clear the clientdata-pointer, remove all current
occurrences in the drivers to simplify the code and prevent confusion.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Richard Purdie <rpurdie@linux.intel.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-06-03 11:33:58 +02:00
Wolfram Sang 35bfc353dc i2c/busses: Move two drivers to embedded section
And fix a typo while we are here

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-06-03 11:33:56 +02:00
Jean Delvare 3b5f794b8b i2c: Rename i2c_check_addr to i2c_check_addr_busy
Otherwise it's not clear what it is checking.

Also move the function to save a forward declaration.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-06-03 11:33:55 +02:00
Jean Delvare 656b8761ab i2c: Document reserved I2C addresses
Move strict I2C address validity check to a single function, and
document the reserved I2C addresses there.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
2010-06-03 11:33:53 +02:00
Jean Delvare 3a89db5f30 i2c: Check for address validity on client registration
Do basic address validity checks when a client is being registered. We
already had checks in place for devices which are being detected, but
not for devices which are simply instantiated.

This is a very basic check. We don't want to do strict checking here
because some devices are known to infringe the I2C address constraints
(e.g. IR receivers at 7-bit address 0x7a while this value is
supposedly reserved for 10-bit addresses.) So we assume the caller
knows what it is doing.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Matthieu Castet <castet.matthieu@free.fr>
2010-06-03 11:33:52 +02:00
Jean Delvare 63e4e80218 i2c: Share the I2C device presence detection code
Use the same I2C device presence detection code for legacy and new
device detection functions. This is more consistent and makes the code
smaller.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Matthieu Castet <castet.matthieu@free.fr>
2010-06-03 11:33:51 +02:00
Paul Mundt d5b732b17c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2010-05-31 13:14:26 +09:00
Paul Mundt 1f782fee18 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2010-05-24 08:52:55 +09:00
Grant Likely cf9b59e9d3 Merge remote branch 'origin' into secretlab/next-devicetree
Merging in current state of Linus' tree to deal with merge conflicts and
build failures in vio.c after merge.

Conflicts:
	drivers/i2c/busses/i2c-cpm.c
	drivers/i2c/busses/i2c-mpc.c
	drivers/net/gianfar.c

Also fixed up one line in arch/powerpc/kernel/vio.c to use the
correct node pointer.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-22 00:36:56 -06:00
Grant Likely 4018294b53 of: Remove duplicate fields from of_platform_driver
.name, .match_table and .owner are duplicated in both of_platform_driver
and device_driver.  This patch is a removes the extra copies from struct
of_platform_driver and converts all users to the device_driver members.

This patch is a pretty mechanical change.  The usage model doesn't change
and if any drivers have been missed, or if anything has been fixed up
incorrectly, then it will fail with a compile time error, and the fixup
will be trivial.  This patch looks big and scary because it touches so
many files, but it should be pretty safe.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
2010-05-22 00:10:40 -06:00
Chase Douglas 7c4fda1aa1 i2c-nforce2: Remove redundant error messages on ACPI conflict
The ACPI subsystem strictly checks for resource conflicts. When there's
a conflict, it outputs a warning message with all the details needed to
properly diagnose the underlying issue. However, the i2c-nforce2 driver
also prints its own message. Not only is the message redundant, it is at
the KERN_ERR level, which overrides some bootsplash screens for no good
reason. This change removes the two lines that print out the error
messages.

Signed-off-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:41:01 +02:00
H Hartley Sweeten 2178218027 i2c: Use <linux/io.h> instead of <asm/io.h>
As warned by checkpatch.pl, <linux/io.h> should be used instead of
<asm/io.h>.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:41:01 +02:00
Farid Hammane 2086ca482f i2c-algo-pca: Fix coding style issues
Fix up some coding style issues. i2c-algo-pca.c has been built
successfully after applying this patch and the binary object is
still exactly the same. Other issues found by checkpatch.pl were
voluntarily not fixed, either to keep readability, or because of
false positive errors.

Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:41:00 +02:00
Farid Hammane ae5624fc36 i2c-dev: Fix all coding style issues
Fix all coding style issues found by checkpatch.pl.

Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:59 +02:00
Farid Hammane 7225acf4aa i2c-core: Fix some coding style issues
Fix up coding style issues found by the checkpatch.pl tool.

Signed-off-by: Farid Hammane <farid.hammane@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:58 +02:00
Marek Szyprowski b868078487 i2c-gpio: Move initialization code to subsys_initcall()
GPIO driven I2C bus can be used for controlling the PMIC chip. The
example of such configuration is Samsung Aquila board.

This patch moves initialization code to subsys_initcall() to ensure
that the i2c bus is available early so the regulators can be quickly
probed and available for other devices on their probe() call.

Such solution has been proposed by Mark Brown to fix the problem of
the regulators not beeing available on the peripheral device probe():
http://lists.infradead.org/pipermail/linux-arm-kernel/2010-March/011971.html

Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:58 +02:00
Jean Delvare bfdcad902f i2c-parport: Make template structure const
parport_algo_data is a template so it can be marked const.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:57 +02:00
H Hartley Sweeten 0be16c3061 i2c-dev: Remove unnecessary casts
The private_data member of struct file is a void *, there is no need
to cast it.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:57 +02:00
Jean Delvare c5aa69285c i2c-stub: Expose the default functionality flags
It is easier to adjust the flags when you know their default value.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
2010-05-21 18:40:56 +02:00
Jean Delvare e624dbd324 i2c/scx200_acb: Make PCI device ids constant
Make PCI device ids constant as we just did for many other i2c bus
drivers already.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Márton Németh <nm127@freemail.hu>
2010-05-21 18:40:56 +02:00
Ivo Manca 3fb21c64b6 i2c-i801: Fix all checkpatch warnings
Fix all checkpatch warnings. No functional changes are made.

Signed-off-by: Ivo Manca <pinkel@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:40:55 +02:00
Jean Delvare e0e8398c7a i2c-i801: All newer devices have all the optional features
Only the oldest devices lack some of the features supported by this
driver. List them explicitly, and default to all features enabled for
all other chips, including the ones added through sysfs. This will
make future driver maintenance easier.

In the unlikely event of a not yet supported device not implementing
all the features, one can always use the disable_features module
parameter to prevent the driver from attempting to use them.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Seth Heasley <seth.heasley@intel.com>
2010-05-21 18:40:55 +02:00
Jean Delvare adff687d8c i2c-i801: Let the user disable selected driver features
Let the user disable selected features normally supported by the
device. This makes it possible to work around possible driver or
hardware bugs if the feature in question doesn't work as intended
for whatever reason.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Felix Rubinstein <felixru@gmail.com>
2010-05-21 18:40:54 +02:00
Linus Torvalds c3ad33c9bc Merge branch 'for-linus/i2c-2635' of git://git.fluff.org/bjdooks/linux
* 'for-linus/i2c-2635' of git://git.fluff.org/bjdooks/linux: (21 commits)
  i2c-highlander: remover superflous variable
  i2c-ibm-iic: drop NO_IRQ
  i2c-cpm: drop NO_IRQ
  i2c-mpc: drop NO_IRQ
  MAINTAINERS: add i2c tree for embedded platforms
  i2c-pxa: only define 'blue_murder'-function if DEBUG is #defined
  i2c-pxa: remove unused macro
  i2c-nomadik: fix operator precedence warning
  i2c-nomadik: release region when removed
  OMAP3: I2C: Clean up Errata 1p153 handling
  OMAP2/3: I2C: Errata ID i207: Clear wrong RDR interrupt
  omap: i2c: add a timeout to the busy waiting
  omap: i2c: make errata 1.153 workaround a separate function
  i2c-omap: add mpu wake up latency constraint in i2c
  omap: i2c: Add i2c support on omap4 platform
  i2c-bfin-twi: return completion in interrupt for smbus quick transfers
  i2c-bfin-twi: remove redundant retry
  i2c-bfin-twi: fix lost interrupts at high speeds
  i2c-bfin-twi: add debug output for error status
  i2c-bfin-twi: integrate timeout timer with completion interface
  ...
2010-05-20 09:41:17 -07:00
Linus Torvalds 46ee964509 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM: PM QOS update fix
  Freezer / cgroup freezer: Update stale locking comments
  PM / platform_bus: Allow runtime PM by default
  i2c: Fix bus-level power management callbacks
  PM QOS update
  PM / Hibernate: Fix block_io.c printk warning
  PM / Hibernate: Group swap ops
  PM / Hibernate: Move the first_sector out of swsusp_write
  PM / Hibernate: Separate block_io
  PM / Hibernate: Snapshot cleanup
  FS / libfs: Implement simple_write_to_buffer
  PM / Hibernate: document open(/dev/snapshot) side effects
  PM / Runtime: Add sysfs debug files
  PM: Improve device power management document
  PM: Update device power management document
  PM: Allow runtime_suspend methods to call pm_schedule_suspend()
  PM: pm_wakeup - switch to using bool
2010-05-20 09:03:55 -07:00
Paul Mundt ffee72d468 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2010-05-20 11:57:38 +09:00
Wolfram Sang b5c80bc5d7 i2c-highlander: remover superflous variable
When cppcheck found this flaw

[./i2c/busses/i2c-highlander.c:284]: (style) Warning - using char variable in bit operation

it was noted that the 'read'-variable could be simply removed as read_write can
only be 0 or 1 anyhow. So, we remove the flaw and simplify the code.

Reported-by: d binderman <dcb314@hotmail.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:01 +01:00
Wolfram Sang f0ec9e20ba i2c-ibm-iic: drop NO_IRQ
Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:01 +01:00
Wolfram Sang b865a4e7ab i2c-cpm: drop NO_IRQ
Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Jochen Friedrich <jochen@scram.de>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:01 +01:00
Wolfram Sang bf727e016f i2c-mpc: drop NO_IRQ
Drop NO_IRQ as 0 is the preferred way to describe 'no irq'
(http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is
only used on powerpc, where NO_IRQ is 0 anyhow.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:01 +01:00
Wolfram Sang 0d813d9960 i2c-pxa: only define 'blue_murder'-function if DEBUG is #defined
This talkative function is also called on timeouts. As timeouts can
happen on regular writes to EEPROMs (no error case), this creates false
positives.  Giving lots of details is interesting only for developers
anyhow, so just use the function if DEBUG is #defined.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Cc: Roel Kluin <roel.kluin@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
2010-05-20 00:19:00 +01:00
Uwe Kleine-König 29412e6900 i2c-pxa: remove unused macro
Commit

	beea494 ([ARM] Remove EEPROM slave emulation from i2c-pxa driver.)

removed all uses of eedbg, so the definition can go, too.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2010-05-20 00:19:00 +01:00
Rabin Vincent 1df3ab1b91 i2c-nomadik: fix operator precedence warning
Fix this warning:
i2c-nomadik.c:707: warning: suggest parentheses around operand of '!' or change '&' to '&&' or '!' to '~'

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:00 +01:00
Rabin Vincent a1c27678c0 i2c-nomadik: release region when removed
So that the module can be loaded again after an unload.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:00 +01:00
manjugk manjugk 8a9d97d3a1 OMAP3: I2C: Clean up Errata 1p153 handling
Clean up existing Errata 1p153 handling to use generic
errata handling mechanism through dev flag.

Signed-off-by: Manjunatha GK <manjugk@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:19:00 +01:00
manjugk manjugk f3083d921d OMAP2/3: I2C: Errata ID i207: Clear wrong RDR interrupt
Under certain rare conditions, I2C_STAT[13].RDR bit may be set
and the corresponding interrupt fire, even there is no data in
the receive FIFO, or the I2C data transfer is still ongoing.
These spurious RDR events must be ignored by the software.

This patch handles and ignores RDR spurious interrupts.

The below sequence is required in interrupt handler for
handling this errata:
1. If RDR is set to 1, clear RDR
2. Read I2C status register and check for BusBusy bit. If BusBusy
bit is set, skip remaining steps.
3. If BusBusy bit is not set, perform read operation on I2C status
register.
4. If RDR is set, clear the same. Check RDR again and clear if it sets
RDR bit again.
5. Perform I2C Data Read operation N number of times(where N is value
read from the register BUFSTAT-RXSTAT bit fields).

Note:
This errata is not applicable for omap2420 and omap4.
It is applicable for:
1. omap2430
2. omap34xx(including omap3630).

Signed-off-by: Manjunatha GK <manjugk@ti.com>
Cc: Hema Kalliguddi <hemahk@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Aaro Koskinen <Aaro.Koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:59 +01:00
Alexander Shishkin e9f59b9c9b omap: i2c: add a timeout to the busy waiting
The errata 1.153 workaround is busy waiting on XUDF bit in interrupt
context, which may lead to kernel hangs. The problem can be reproduced
by running the bus with wrong (too high) speed.

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:59 +01:00
Alexander Shishkin 2dd151ab27 omap: i2c: make errata 1.153 workaround a separate function
This is to avoid insanely long lines and levels of indentation.

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Cc: Nishant Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:59 +01:00
Kalle Jokiniemi 20c9d2c4ab i2c-omap: add mpu wake up latency constraint in i2c
While waiting for completion of the i2c transfer, the
MPU could hit OFF mode and cause several msecs of
delay that made i2c transfers fail more often. The
extra delays and subsequent re-trys cause i2c clocks
to be active more often. This has also an negative
effect on power consumption.

Created a mechanism for passing and using the
constraint setting function in driver code. The used
mpu wake up latency constraints are now set individually
per bus, and they are calculated based on clock rate
and fifo size.

Thanks to Jarkko Nikula, Moiz Sonasath, Paul Walmsley,
and Nishanth Menon for tuning out the details of
this patch.

Updates by Kevin as requested by Tony:

- Remove omap_set_i2c_constraint_func() in favor of conditionally
  adding the flag in omap_i2c_add_bus() in order to keep all the OMAP
  conditional checking in a single location.
- Update set_mpu_wkup_lat prototypes to match OMAP PM layer so
  OMAP PM function can be used directly in pdata.

Cc: Moiz Sonasath <m-sonasath@ti.com>
Cc: Jarkko Nikula <jhnikula@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Nishanth Menon <nm@ti.com>
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:59 +01:00
Santosh Shilimkar f38e66e007 omap: i2c: Add i2c support on omap4 platform
This patch is rebased version of earlier post to add I2C
driver support to OMAP4 platform. On OMAP4, all
I2C register address offsets are changed from OMAP1/2/3 I2C.
In order to not have #ifdef's at various places in code,
as well as to support multi-OMAP build, an array is created
to hold the register addresses with it's offset.

This patch was submitted, reviewed and acked on mailing list
already. For more details refer below link
http://www.mail-archive.com/linux-i2c@vger.kernel.org/msg02281.html

This updated verion has a depedancy on "Add support for 16-bit registers"
posted on linux-omap. Below is the patch-works link for the same

http://patchwork.kernel.org/patch/72295/

Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Cc: Cory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:59 +01:00
Sonic Zhang f0ac131a21 i2c-bfin-twi: return completion in interrupt for smbus quick transfers
A smbus quick transfer has no data after the address byte.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Sonic Zhang be2f80f0a3 i2c-bfin-twi: remove redundant retry
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Sonic Zhang 5481d0753e i2c-bfin-twi: fix lost interrupts at high speeds
i2c event of next read/write byte may trigger before current int state
is cleared in the interrupt handler. So, this should be done at the
beginning of interrupt handler to avoid losing new i2c events.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Michael Hennerich 5cfafc18f3 i2c-bfin-twi: add debug output for error status
Add some debug() code to decode the error register.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Sonic Zhang dd7319a528 i2c-bfin-twi: integrate timeout timer with completion interface
There isn't much point in managing our own custom timeout timer when the
completion interface already includes support for it.  This makes the
resulting code much simpler and robust.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Mark Brown 1bc2962e53 i2c-s3c2410: Remove unconditional 1ms delay on each transfer
The S3C I2C controller indicates completion of I2C transfers before
the bus has a stop condition on it. In order to ensure that we do not
attempt to start a new transfer before the bus is idle the driver
currently inserts a 1ms delay. This is vastly larger than is generally
required and has a visible effect on performance under load, such as
when bringing up audio CODECs or reading back status information with
non-bulk I2C reads.

Replace the sleep with a spin on the IIC status register for up to 1ms.
This will busy wait but testing on my SMDK6410 system indicates that
the overwhelming majority of transactions complete on the first spin,
with maximum latencies of less than 10 spins so the absolute overhead
of busy waiting should be at worst comprable to msleep(), and the
overall system performance is dramatically improved.

The main risk is poor interaction with multimaster systems where
we may miss the bus going idle before the next transaction. Defend
against this by falling back to the original 1ms delay after 20 spins.

The overall effect in my testing is an approximately 20% improvement
in kernel startup time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-20 00:18:58 +01:00
Grant Likely 61c7a080a5 of: Always use 'struct device.of_node' to get device node pointer.
The following structure elements duplicate the information in
'struct device.of_node' and so are being eliminated.  This patch
makes all readers of these elements use device.of_node instead.

(struct of_device *)->node
(struct dev_archdata *)->prom_node (sparc)
(struct dev_archdata *)->of_node (powerpc & microblaze)

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-18 16:10:44 -06:00
Russell King ac1d426e82 Merge branch 'devel-stable' into devel
Conflicts:
	arch/arm/Kconfig
	arch/arm/include/asm/system.h
	arch/arm/mm/Kconfig
2010-05-17 17:24:04 +01:00
Rafael J. Wysocki 2f60ba706b i2c: Fix bus-level power management callbacks
There are three issues with the i2c bus type's power management
callbacks at the moment.  First, they don't include any hibernate
callbacks, although they should at least include the .restore()
callback (there's no guarantee that the driver will be present in
memory before loading the image kernel and we must restore the
pre-hibernation state of the device).  Second, the "legacy"
callbacks are not going to be invoked by the PM core since the bus
type's pm object is not NULL.  Finally, the system sleep PM
(ie. suspend/resume) callbacks don't check if the device has been
already suspended at run time, in which case they should skip
suspending it.  Also, it looks like the i2c bus type can use the
generic subsystem-level runtime PM callbacks.

For these reasons, rework the system sleep PM callbacks provided by
the i2c bus type to handle hibernation correctly and to invoke the
"legacy" callbacks for drivers that provide them.  In addition to
that make the i2c bus type use the generic subsystem-level runtime
PM callbacks.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
2010-05-10 23:09:30 +02:00
Jean Delvare 6629dcff19 i2c-core: Use per-adapter userspace device lists
Using a single list for all userspace devices leads to a dead lock
on multiplexed buses in some circumstances (mux chip instantiated
from userspace). This is solved by using a separate list for each
bus segment.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
2010-05-04 11:09:28 +02:00
Jean Delvare b1d4b390ea i2c: Fix probing of FSC hardware monitoring chips
Some FSC hardware monitoring chips (Syleus at least) doesn't like
quick writes we typically use to probe for I2C chips. Use a regular
byte read instead for the address they live at (0x73). These are the
only known chips living at this address on PC systems.

For clarity, this fix should not be needed for kernels 2.6.30 and
later, as we started instantiating the hwmon devices explicitly based
on DMI data. Still, this fix is valuable in the following two cases:
* Support for recent FSC chips on older kernels. The DMI-based device
  instantiation is more difficult to backport than the device support
  itself.
* Case where the DMI-based device instantiation fails, whatever the
  reason. We fall back to probing in that case, so it should work.

This fixes kernel bug #15634:
https://bugzilla.kernel.org/show_bug.cgi?id=15634

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Cc: stable@kernel.org
2010-05-04 11:09:28 +02:00
Wolfram Sang e4a7b9b04d i2c-core: Erase pointer to clientdata on removal
After discovering that a lot of i2c-drivers leave the pointer to their
clientdata dangling, it was decided to let the core handle this issue.
It is assumed that the core may access the private data after remove()
as there are no guarantees for the lifetime of such pointers anyhow (see
thread starting at http://lkml.org/lkml/2010/3/21/68)

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-04 11:09:27 +02:00
Russell King ceade897f3 ARM: Add Versatile Express support
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-05-02 09:35:38 +01:00
David Daney 20f1216060 I2C: Fix section mismatch errors in i2c-octeon.c
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-i2c@vger.kernel.org
To: ben-linux@fluff.org
To: khali@linux-fr.org
Cc: linux-mips@linux-mips.org
Cc: rade.bozic.ext@nsn.com
Patchwork: http://patchwork.linux-mips.org/patch/1037/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-04-30 20:52:52 +01:00
Grant Likely d12d42f744 i2c/of: Allow device node to be passed via i2c_board_info
The struct device_node *of_node pointer is moving out of dev->archdata
and into the struct device proper.  of_i2c.c needs to set the of_node
pointer before the device is registered.  Since the i2c subsystem
doesn't allow 2 stage allocation and registration of i2c devices, the
of_node pointer needs to be passed via the i2c_board_info structure
so that it is set prior to registration.

This patch adds of_node to struct i2c_board_info (conditional on
CONFIG_OF), sets of_node in i2c_new_device(), and modifies of_i2c.c
to use the new parameter.  The calling of dev_archdata_set_node()
from of_i2c will be removed in a subsequent patch when of_node is
removed from archdata and all users are converted over.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-04-28 18:21:56 -06:00
Dan Carpenter 42df64b1f8 i2c-stu300: off by one issue
If we don't find the correct rate, we want to end the loop with "i"
pointing to the last element in the array.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-20 01:17:13 +01:00
Kevin Wells 28ad3321a1 i2c-pnx: Add stop conditions for end of transfer
Add a stop condition bit flag to the last byte in the transfer.
This will generate an extra clock to handle the stop condition
and prevent devices from staying in an ACK'd state.

Signed-off-by: Kevin Wells <wellsk40@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-20 01:16:57 +01:00
Kevin Wells be80dbaa3e i2c-pnx: Limit maximum divider to 1023
Limit maximum divider to 0x3ff to divider computations. On high I2C
parent clock rates, the divider can exceed 0x3ff. This will help
prevent some very odd clock rates.

Signed-off-by: Kevin Wells <wellsk40@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-20 01:16:57 +01:00
Mika Westerberg 7c6bd2010f i2c-omap: fix OOPS in omap_i2c_unidle() during probe
Commit d84d3ea317 added register shift to allow
also 16-bit register access. However, omap_i2c_unidle() is called before these
are set which causes the following OOPS:

    Unhandled fault: alignment exception (0x801) at 0xfa070009
    Internal error: : 801 [#1]
    last sysfs file:
    Modules linked in:
    CPU: 0    Not tainted  (2.6.34-rc2-00052-gae6be51 #3)
    PC is at omap_i2c_unidle+0x44/0x138
    LR is at trace_hardirqs_on_caller+0x158/0x18c
    pc : [<c01cd2c4>]    lr : [<c00743f8>]    psr: 20000013
    sp : cfc2bf10  ip : 00000009  fp : 00000000
    r10: 00000000  r9 : 00000000  r8 : c0378560
    r7 : c0378b88  r6 : c0378558  r5 : cfcadc00  r4 : cfcadc00
    r3 : 00000009  r2 : fa070000  r1 : 00000000  r0 : 00000000
    Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
    Control: 10c5387f  Table: 80004019  DAC: 00000017
    Process swapper (pid: 1, stack limit = 0xcfc2a2e8)
    Stack: (0xcfc2bf10 to 0xcfc2c000)
    bf00:                                     c0372cf8 c027225c 00000000 c0a69678
    bf20: cfc3e508 c0500898 c0378560 c0378560 c0500898 cfcac8c0 c04fc280 c017d4f4
    bf40: c0378560 c017c63c c0378560 c0378594 c0500898 cfcac8c0 c04fc280 c017c754
    bf60: 00000000 c017c6f4 c0500898 c017beac cfc16a5c cfc3fd94 c0023448 c0500898
    bf80: c0500898 c017b7d4 c032dc7f 00000093 cfc28d40 c0023448 00000000 c0500898
    bfa0: 00000000 00000000 00000000 c017ca48 c0023448 00000000 c001d274 00000000
    bfc0: 00000000 c002b344 00000031 00000000 00000000 00000192 00000000 c0023448
    bfe0: 00000000 00000000 00000000 c0008578 00000000 c002c304 ffdfffff ffffffff
    [<c01cd2c4>] (omap_i2c_unidle+0x44/0x138) from [<c027225c>] (omap_i2c_probe+0x1a4/0x398)
    [<c027225c>] (omap_i2c_probe+0x1a4/0x398) from [<c017d4f4>] (platform_drv_probe+0x18/0x1c)
    [<c017d4f4>] (platform_drv_probe+0x18/0x1c) from [<c017c63c>] (driver_probe_device+0xc0/0x178)
    [<c017c63c>] (driver_probe_device+0xc0/0x178) from [<c017c754>] (__driver_attach+0x60/0x84)
    [<c017c754>] (__driver_attach+0x60/0x84) from [<c017beac>] (bus_for_each_dev+0x44/0x74)
    [<c017beac>] (bus_for_each_dev+0x44/0x74) from [<c017b7d4>] (bus_add_driver+0x9c/0x218)
    [<c017b7d4>] (bus_add_driver+0x9c/0x218) from [<c017ca48>] (driver_register+0xa8/0x130)
    [<c017ca48>] (driver_register+0xa8/0x130) from [<c002b344>] (do_one_initcall+0x5c/0x1b8)
    [<c002b344>] (do_one_initcall+0x5c/0x1b8) from [<c0008578>] (kernel_init+0x90/0x144)
    [<c0008578>] (kernel_init+0x90/0x144) from [<c002c304>] (kernel_thread_exit+0x0/0x8)
    Code: e5942004 e3a0c009 e1a0331c e3a01000 (e18210b3)
    ---[ end trace 1b75b31a2719ed1c ]---

This patch moves register shift setting before any register accesses are done.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Cc: Cory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-20 01:16:57 +01:00
Arnaud Patard da9c99fc32 i2c-imx: fix error handling
- Return -ETIMEDOUT on bus busy error
- Fix timeout test "time_after(jiffies, orig_jiffies + HZ / 1000)" :
  By default, HZ=100 on arm. This means that this test has no chances to
  work and may result in a dead loop. Set timeout to 500ms.
- Don't try to send a new message if we failed to transmit
  previous one. This was preventing to recover from error on my system

Signed-off-by: Arnaud Patard <apatard@mandriva.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-04-20 01:16:57 +01:00
Magnus Damm 0924fada1e i2c: i2c-sh_mobile kconfig update for SH-Mobile ARM
Update the Kconfig entry for the i2c-sh_mobile driver to
enable build on SH-Mobile ARM platforms

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-07 16:19:55 +09:00
Magnus Damm 962b6032c8 i2c: i2c-sh_mobile support for new ICIC bits
Add support for a new version of the IIC block
found in the SH-Mobile ARM line of processors.

Prototype patch written by Nishimoto-san.
Tested on sh7377 and sh7372.

Signed-off-by: NISHIMOTO Hiroki <nishimoto.hiroki@renesas.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-07 16:19:47 +09:00
Magnus Damm 12a55f2db7 i2c: i2c-sh_mobile register access code break out
Break out register access functions in the
i2c-sh_mobile driver. This update should not
change any driver logic.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-07 16:19:33 +09:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Darrick J. Wong 0f5ed04cb3 i2c-scmi: Provide module aliases for automatic loading
Provide module aliases for automatic loading.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-24 14:38:39 +01:00
Crane Cai e82e15ddd3 i2c-scmi: Support IBM SMBus CMI devices
*) add a new HID for IBM SMBus CMI devices
*) add methods for IBM SMBus CMI devices
*) hook different HID with different control methods set
*) minor tweaks as suggested by Jean Delvare

Slightly modified by Darrick to use #define'd IBM SMBUS HID from Darrick's ACPI
scan quirk patch.

Signed-off-by: Crane Cai <crane.cai@amd.com>
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-24 14:38:38 +01:00
Randy Dunlap 02ca6c407e Add include to i2c-xii.c to fix build error
drivers/i2c/busses/i2c-xiic.c:493: error: implicit declaration of function 'mdelay'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: "Richard Röjfors" <richard.rojfors@pelagicore.com>
Cc: "Ben Dooks (embedded platforms)" <ben-linux@fluff.org>
Cc: linux-i2c@vger.kernel.org
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-14 11:14:58 -07:00
Jean Delvare 0a9c147513 i2c-algo-bit: Add pre- and post-xfer hooks
Drivers might have to do random things before and/or after I2C
transfers. Add hooks to the i2c-algo-bit implementation to let them do
so.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Alex Deucher <alexdeucher@gmail.com>
2010-03-13 20:56:56 +01:00
Jean Delvare e77482d735 i2c: Drop configure option I2C_DEBUG_CHIP
Now that directory drivers/i2c/chips is gone, configuration option
I2C_DEBUG_CHIP no longer has any effect, so we can drop it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
2010-03-13 20:56:55 +01:00
Jean Delvare 6a9bcced51 tsl2550: Move from i2c/chips to misc
Move the last remaining driver from i2c/chips to misc. Good ridance!

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
2010-03-13 20:56:54 +01:00
Jean Delvare c074c39d62 i2c-i801: Don't use the block buffer for I2C block writes
Experience has shown that the block buffer can only be used for SMBus
(not I2C) block transactions, even though the datasheet doesn't
mention this limitation.

Reported-by: Felix Rubinstein <felixru@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Oleg Ryjkov <oryjkov@gmail.com>
Cc: stable@kernel.org
2010-03-13 20:56:53 +01:00
Jean Delvare 8e4b980c28 i2c-powermac: Be less verbose in the absence of real errors.
Be less verbose in the absence of real errors. We don't have to report
failed probes to the users, it's only confusing them.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Andrey Gusev <ronne@list.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: stable@kernel.org
2010-03-13 20:56:52 +01:00
Stephen Rothwell f635a1e74b i2c-smbus: Use device_lock/device_unlock
Use the new device locking/unlocking API.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-13 20:56:51 +01:00
Linus Torvalds c32da02342 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (56 commits)
  doc: fix typo in comment explaining rb_tree usage
  Remove fs/ntfs/ChangeLog
  doc: fix console doc typo
  doc: cpuset: Update the cpuset flag file
  Fix of spelling in arch/sparc/kernel/leon_kernel.c no longer needed
  Remove drivers/parport/ChangeLog
  Remove drivers/char/ChangeLog
  doc: typo - Table 1-2 should refer to "status", not "statm"
  tree-wide: fix typos "ass?o[sc]iac?te" -> "associate" in comments
  No need to patch AMD-provided drivers/gpu/drm/radeon/atombios.h
  devres/irq: Fix devm_irq_match comment
  Remove reference to kthread_create_on_cpu
  tree-wide: Assorted spelling fixes
  tree-wide: fix 'lenght' typo in comments and code
  drm/kms: fix spelling in error message
  doc: capitalization and other minor fixes in pnp doc
  devres: typo fix s/dev/devm/
  Remove redundant trailing semicolons from macros
  fix typo "definetly" -> "definitely" in comment
  tree-wide: s/widht/width/g typo in comments
  ...

Fix trivial conflict in Documentation/laptops/00-INDEX
2010-03-12 16:04:50 -08:00
Jiri Kosina 318ae2edc3 Merge branch 'for-next' into for-linus
Conflicts:
	Documentation/filesystems/proc.txt
	arch/arm/mach-u300/include/mach/debug-macro.S
	drivers/net/qlge/qlge_ethtool.c
	drivers/net/qlge/qlge_main.c
	drivers/net/typhoon.c
2010-03-08 16:55:37 +01:00