Commit Graph

1381 Commits

Author SHA1 Message Date
Grant Likely 0d73299ddf Merge branch spi-next from git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-09 16:02:44 +00:00
Mika Westerberg a3496855d9 spi/pxa2xx: add support for Lynxpoint SPI controllers
Intel Lynxpoint PCH Low Power Subsystem has two general purpose SPI
controllers that are LPSS_SSP compatible. These controllers are enumerated
from ACPI namespace with ACPI IDs INT33C0 and INT33C1.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 13:15:34 +00:00
Mika Westerberg a0d2642e92 spi/pxa2xx: add support for Intel Low Power Subsystem SPI
Intel LPSS SPI is pretty much the same as the PXA27xx SPI except that it
has few additional features over the original:

	o FIFO depth is 256 entries
	o RX FIFO has one watermark
	o TX FIFO has two watermarks, low and high
	o chip select can be controlled by writing to a register

The new FIFO registers follow immediately the PXA27xx registers but then there
are some additional LPSS private registers at offset 1k or 2k from the base
address. For these private registers we add new accessors that take advantage
of drv_data->lpss_base once it is resolved.

We add a new type LPSS_SSP that can be used to distinguish the LPSS devices
from others.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 13:14:40 +00:00
Mika Westerberg b833172fd8 spi/pxa2xx: add support for SPI_LOOP
This is useful when testing the functionality of the controller from userspace
and there aren't any real SPI slave devices connected to the bus.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 12:15:36 +00:00
Mika Westerberg 7d94a50585 spi/pxa2xx: add support for runtime PM
Drivers should put the device into low power states proactively whenever the
device is not in use. Thus implement support for runtime PM and use the
autosuspend feature to make sure that we can still perform well in case we see
lots of SPI traffic within short period of time.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 12:15:32 +00:00
Mika Westerberg 5928808ef6 spi/pxa2xx: add support for DMA engine
To be able to use DMA with this driver on non-PXA platforms we implement
support for the generic DMA engine API. This lets user to use different DMA
engines with little or no modification to the driver.

Request lines and channel numbers can be passed to the driver from the
platform specific data.

The DMA engine implementation will be selected by default even on PXA
platform. User can select the legacy DMA API by enabling Kconfig option
CONFIG_SPI_PXA2XX_PXADMA.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 12:15:28 +00:00
Mika Westerberg cd7bed0034 spi/pxa2xx: break out the private DMA API usage into a separate file
The PXA SPI driver uses PXA platform specific private DMA implementation
which does not work on non-PXA platforms. In order to use this driver on
other platforms we break out the private DMA implementation into a separate
file that gets compiled only when CONFIG_SPI_PXA2XX_PXADMA is set. The DMA
functions are stubbed out if there is no DMA implementation selected (i.e
we are building on non-PXA platform).

While we are there we can kill the dummy DMA bits in pxa2xx_spi.h as they
are not needed anymore for CE4100.

Once this is done we can add the generic DMA engine support to the driver
that allows usage of any DMA controller that implements DMA engine API.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Lu Cao <lucao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-08 12:15:21 +00:00
Clark Williams 8bd75c77b7 sched/rt: Move rt specific bits into new header file
Move rt scheduler definitions out of include/linux/sched.h into
new file include/linux/sched/rt.h

Signed-off-by: Clark Williams <williams@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20130207094707.7b9f825f@riff.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-02-07 20:51:08 +01:00
Michał Mirosław 9f3b795a62 driver-core: constify data for class_find_device()
All in-kernel users of class_find_device() don't really need mutable
data for match callback.

In two places (kernel/power/suspend_test.c, drivers/scsi/osd/osd_uld.c)
this patch changes match callbacks to use const search data.

The const is propagated to rtc_class_open() and power_supply_get_by_name()
parameters.

Note that there's a dev reference leak in suspend_test.c that's not
touched in this patch.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-02-06 12:18:56 -08:00
Gabor Juhos 7410e84858 spi/ath79: add shutdown handler
The SPI controller of the AR7xxx/AR9xxx SoCs
have a special mode which allows the SoC to
directly read data from SPI flash chips. In
this mode, the content of the SPI flash chip
can be accessed via a memory mapped region.

During early init time, the kernel expects
that the flash chip is accessible through
that memory region because it reads board
specific values (e.g. MAC address, WiFi
calibration data) from the flash on various
boards.

This is working if the kernel is loaded
directly by the bootloader because that
leaves the SPI controller in the special
mode. However it is not working in a kexec'd
kernel because the SPI driver does not restore
the special mode during shutdown.

The patch adds a shutdown handler to fix this
issue.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-06 10:41:12 +00:00
John Crispin ec3eaeca91 spi/mips-lantiq: set SPI_MASTER_HALF_DUPLEX flag
Due to hardware limitations of the spi/flash frontend of the EBU we need to set
the SPI_MASTER_HALF_DUPLEX flag.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 17:16:55 +00:00
John Crispin 737a7c4380 spi/mips-lantiq: make use of spi_finalize_current_message
Rather than calling m->complete() directly we choose the sane way and call
spi_finalize_current_message instead.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 17:16:41 +00:00
Jonas Gorski b17de07606 spi/bcm63xx: work around inability to keep CS up
This SPI controller does not support keeping CS asserted after sending
a transfer.
Since messages expected on this SPI controller are rather short, we can
work around it for normal use cases by sending all transfers at once in
a big full duplex stream.

This means that we cannot change the speed between transfers if they
require CS to be kept asserted, but these would have been rejected
before anyway because of the inability of keeping CS asserted.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 17:14:33 +00:00
Murali Karicheri 32310aaf5c spi/davinci: use request_threaded_irq() to fix deadlock
With RT pre-empt patch applied to Linux kernel, the irq handler will be
force converted to an irq thread. spi driver can get back to back messages
from the slave device. In such cases, IRQ thread doesn't get a chance to
run to read the slave data. Hence the irq handler must be run in hard irq
context to read/write data from slave device. Otherwise, the kernel goes
into a deadlock. This patch fixes this issue when PREEMPT_RT_FULL is
enabled in the kernel. A dummy thread function is provided to satisfy the
request_threaded_irq() API. Passing a NULL for function also causes the
irq handler to be executed in the thread context.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 17:12:26 +00:00
Ezequiel Garcia 41ab724aac spi/orion: Use module_platform_driver()
This patch reduces and simplifies initalization code by
using module_platform_driver().
With this change it's necessary to remove the __init annotation
to avoid section mismatch warnings.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:44:14 +00:00
Jonas Gorski c0fde3ba0e spi/bcm63xx: reject transfers unable to transfer
The hardware does not support keeping CS asserted after sending one
FIFO buffer worth of data, so reject transfers requiring CS being kept
asserted, either between transers or for a certain time after it,
or exceeding the FIFO size.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:44:13 +00:00
Mark Brown 2cd94c8a1b spi: Ensure memory used for spi_write_then_read() is DMA safe
Use GFP_DMA in order to ensure that the memory we allocate for transfers
in spi_write_then_read() can be DMAed. On most platforms this will have
no effect.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:44:13 +00:00
Anatolij Gustschin c88dd349b5 spi/spi-mpc512x-psc: init mode bits supported by the driver
The driver should setup mode bits it supports, otherwise
adding an SPI device might fail even if the driver supports
the requested SPI mode.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:44:12 +00:00
Anatolij Gustschin 9d15a3bac3 spi/mpc512x-psc: don't use obsolet cell-index property
Remove deprecated cell-index property and use spi alias to
obtain the SPI PSC number used for SPI bus id.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:44:12 +00:00
Grant Likely 2deff8d602 spi: Remove erroneous __init, __exit and __exit_p() references in drivers
Some of the spi driver module remove hooks were annotated with __exit
and referenced with __exit_p(). Presumably these were supposed to be
__devinit, __devexit and __devexit_p() since __init/__exit for a
probe/remove hook has never been correct. They also got missed during
the big __devinit/__devexit purge since they didn't match the pattern.
Remove then now to be rid of it.

v2: purge __init also

Reported-by: Arnd Bergmann <arnd@arndb.de>
[Arnd set a patch cleaning up one, and then I found more]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 14:43:16 +00:00
Jingoo Han 75bf336110 spi/s3c64xx: fix checkpatch warnings and error
Fix checkpatch warnings and error as below:
  ERROR: "foo * bar" should be "foo *bar"
  WARNING: please, no space before tabs
  WARNING: quoted string split across lines
  WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 13:21:54 +00:00
Jingoo Han 4eb770067f spi/s3c64xx: Use devm_clk_get() and devm_request_irq()
Use devm_clk_get() and devm_request_irq() rather than clk_get() and
request_irq() to make cleanup paths more simple.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 13:19:43 +00:00
Fabio Estevam 3133fba3bb spi/imx: Add MODULE_ALIAS()
Add an entry for MODULE_ALIAS().

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 13:17:12 +00:00
Laxman Dewangan beb96c2ad4 spi/tegra: remove checks for valid speed
SPI core make sure that all transfer has proper speed set
before calling low level spi transfer. Hence, it is not
require to have check in spi driver.

Remove the check for speed validity from transfer and use it directly.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 13:11:53 +00:00
Laxman Dewangan 059b8ffeee spi: make sure all transfer has proper speed set
When spi client does the spi transfer and if it does not set
the speed for each transfer then set it as default
of spi device in spi core before calling low level transfer.

This will remove the extra check in low level driver for setting
speed.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 13:11:03 +00:00
Gabor Juhos c4a31f4300 spi/ath79: avoid multiple initialization of the SPI controller
Currently we are initializing the SPI controller in
the chip select line function, and that function is
called once for each SPI device on the bus. If a
board has multiple SPI devices, the controller will
be initialized multiple times.

Introduce ath79_spi_{en,dis}able helper functions,
and call those from probe/response in order to avoid
the mutliple initialization of the controller.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:59:47 +00:00
Gabor Juhos 95d79419fe spi/ath79: use gpio_request_one
Use gpio_request_one() instead of multiple gpiolib calls.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:58:55 +00:00
Gabor Juhos f1e8fc9898 spi/ath79: remove superfluous chip select code
The spi_bitbang driver calls the chipselect function
of the driver from spi_bitbang_setup in order to
deselect the given SPI chip, so we don't have to
initialize the CS line here.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:58:18 +00:00
Gabor Juhos 72611db0ee spi/ath79: add missing HIGH->LOW SCK transition
The 'ath79_spi_txrx_mode0' function does not
set the SCK signal to LOW at the end of a word
transfer. This causes communications errors with
certain devices (e.g. the PCF2123 RTC chip).

The patch ensures that the SCK signal will be LOW.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:57:45 +00:00
Gabor Juhos 440114fdb1 spi/ath79: add delay between SCK changes
The driver uses the "as fast as it can" approach
to drive the SCK signal. However this does not
work with certain low speed SPI chips (e.g. the
PCF2123 RTC chip).

The patch adds per-bit slowdowns in order to be
able to use the driver with such chips as well.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:57:02 +00:00
Juha Lumme ba486a2a29 mxs/spi: clear XFER_COUNT in ctrl0 field in DMA descriptor
On MX23 the XFER_COUNT part in ctrl0 field in DMA descriptor was
improperly OR'd during the construction of DMA descriptor chain, instead
of being freshly set.  Because of that too many bytes were being
expected from SPI during the last DMA cycle.  This caused a timeout
(SSP_TIMEOUT) to happen in the processing of the last DMA descriptor,
and thus reads and writes were failing.  This is a fix for the problem,
by clearing XFER_COUNT bytes in ctrl0 before setting the new XFER_COUNT
for DMA descriptor.

Signed-off-by: Juha Lumme <juha.lumme@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:45:24 +00:00
Barry Song f3b8a8ecc5 spi/sirf: add support for new SiRFmarco SMP SoC
the driver is also compatible with SiRFmarco except SiRFprimaII,
so simply add "sirf,marco-spi" to OF match table.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:43:18 +00:00
Barry Song e5118cd2c2 spi/sirf: use clk_prepare_enable and clk_disable_unprepare
Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:43:00 +00:00
Grant Likely f305a0a8d7 Merge branch 'broonie/spi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git
Minor features and bug fixes for PXA, OMAP and GPIO deivce drivers and a
cosmetic change to the bitbang driver.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:30:13 +00:00
Laxman Dewangan 766ed70447 spi: remove check for bits_per_word on transfer from low level driver
The spi core make sure that each transfer structure have the proper
setting for bits_per_word before calling low level transfer APIs.

Hence it is no more require to check again in low level driver for
this field whether this is set correct or not. Removing such code
from low level driver.

The txx9 change also removes a test for bits_per_word set to 0, and
forcing it to 8 in that case. This can also be removed now since
spi_setup() ensures spi->bits_per_word is not zero.

	if (!spi->bits_per_word)
		spi->bits_per_word = 8;

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:26:59 +00:00
Grant Likely bb29785e0d spi/of: Use DT aliases for assigning bus number
Linux assigns a number to each spi_master in the system, but when the
platform used the device tree, the numbers are dynamically assigned and
are not predictable. In general this shouldn't matter since the kernel
doesn't use the bus number for anything other than matching a bus to
spi_boardinfo (not used for DT). However, sometimes userspace needs to
figure out which bus is which, so it makes sense to use the global
/aliases namespace to choose a specific bus number.

It is safe to derive the bus number from an alias because aliases will
never cause two buses to try and use the same bus number. (At one time
the cell-index property was used for this purpose, but cell-index has
the risk of an id collision).

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-05 12:26:59 +00:00
Bastian Hecht cf9c86efec spi/sh-msiof: Add device tree parsing to driver
This adds the capability to retrieve setup data from the device tree
node. The usage of platform data is still available.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:26:58 +00:00
Murali Karicheri aae7147dfc spi/davinci: add OF support for the spi controller
This adds OF support to DaVinci SPI controller to configure platform
data through device bindings. Also replaces clk_enable() with
of clk_prepare_enable() as well as clk_disable() with
clk_disable_unprepare().

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:26:57 +00:00
Felipe Balbi 830379e048 spi/omap2: disable DMA requests before complete()
No actual errors have been found for completing
before disabling DMA request lines, but it just
looks more semantically correct that on our DMA
callback we quiesce the whole thing before stating
transfer is finished.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-02-05 12:26:57 +00:00
Padmavathi Venna b5be04d35d spi: s3c64xx: Modify SPI driver to use generic DMA DT support
This patch modifies the SPI driver to use generic dma dt bindings
support. This passes all the required arguments to dma dev request
functon which in turn calls the dma_request_slave_channel or dma__
request_channel based on DT or non-DT respectively.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-29 14:28:52 +08:00
Prashant Gaikwad 3cb919022a spi: tegra: do not use clock name to get clock
Since Tegra spi devices do not have multiple clocks, no need to use
clock name to get the clock.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 11:19:33 -07:00
Prashant Gaikwad 61fd290d21 ARM: tegra: migrate to new clock code
Migrate Tegra clock support to drivers/clk/tegra, this involves
moving:
1. definition of tegra_cpu_car_ops to clk.c
2. definition of reset functions to clk-peripheral.c
3. change parent of cpu clock.
4. Remove legacy clock initialization.
5. Initialize clocks using DT.
6. Remove all instance of mach/clk.h

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
[swarren: use to_clk_periph_gate().]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-01-28 11:19:07 -07:00
Matthias Brugger 5cbc7ca987 spi: spi-omap2-mcspi.c: Toggle CS after each word
This patch allows the board code to define SPI devices which needs to
toggle the chip select after every word send. This is needed to get a
better resolution reading e.g. an ADC data stream.
Apart from that, as in the normal code CS is controlled by software,
a transfer is done much faster.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 17:00:04 +08:00
Matthias Brugger 18dd6199fa spi: spi-omap2-mcspi.c: fix coding style
This patch fixes some indentation errors.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 16:59:34 +08:00
Maxime Ripard 0202a32d5f spi: spi-gpio: Add checks for the dt properties
The bindings assumed that the gpios properties were always there, which
made the NO_TX and NO_RX mode not usable from device tree. Add extra
checks to make sure that the driver can work if either MOSI or MISO is
not used.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 15:35:56 +08:00
Mika Westerberg 3343b7a6d2 spi/pxa2xx: convert to the common clk framework
Convert clk_enable() to clk_prepare_enable() and clk_disable() to
clk_disable_unprepare() respectively in order to support the common clk
framework. Otherwise we get warnings on the console as the clock is not
prepared before it is enabled.

In addition we must cache the maximum clock rate to drv_data->max_clk_rate
at probe time because clk_get_rate() cannot be called in tasklet context.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 15:21:37 +08:00
Mika Westerberg 7f86bde90e spi/pxa2xx: convert to the pump message infrastructure
The SPI core provides infrastructure for standard message queueing so use
that instead of handling everything in the driver. This simplifies the
driver.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 15:21:37 +08:00
Mika Westerberg 2b9b84f497 spi/pxa2xx: fix warnings when compiling a 64-bit kernel
Fix following warnings seen when compiling 64-bit:

drivers/spi/spi-pxa2xx.c: In function ‘map_dma_buffers’: drivers/spi/spi-pxa2xx.c:384:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/spi/spi-pxa2xx.c:384:40: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/spi/spi-pxa2xx.c: In function ‘pxa2xx_spi_probe’:
drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/spi/spi-pxa2xx.c:1572:27: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 15:21:36 +08:00
Mika Westerberg 2b49ebda39 spi/pxa2xx: allow building on a 64-bit kernel
We are going to use it on 64-bit kernel on Intel Lynxpoint so make sure we
can build it into such kernel.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-26 15:21:36 +08:00
Thierry Reding b0ee560523 spi: Convert to devm_ioremap_resource()
Convert all uses of devm_request_and_ioremap() to the newly introduced
devm_ioremap_resource() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages so all explicit
error messages can be removed from the failure code paths.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-25 12:21:47 -08:00
Kees Cook 6d1f56aa51 drivers/spi: remove depends on CONFIG_EXPERIMENTAL
The CONFIG_EXPERIMENTAL config item has not carried much meaning for a
while now and is almost always enabled by default. As agreed during the
Linux kernel summit, remove it from any "depends on" lines in Kconfigs.

CC: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-21 14:52:45 -08:00
Guennadi Liakhovetski 7a5d8ca12a spi: bitbang: simplify pointer arithmetics
Add a pointer variable to make spi_bitbang_start() look simpler.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-14 07:43:36 +09:00
Mika Westerberg 851bacf590 spi/pxa2xx: embed the ssp_device to platform data
The spi-pxa2xx-pci glue driver had to implement pxa_ssp_request()/free() in
order to support the spi-pxa2xx platform driver. Since the ACPI enabled
platforms can use the same platform driver we would need to implement
pxa_ssp_request()/free() in some central place that can be shared by the
ACPI and PCI glue code.

Instead of doing that we can make pxa_ssp_request()/free() to be available
only when CONFIG_ARCH_PXA is set. On other arches these are being stubbed
out in preference to passing the ssp_device from the platform data
directly.

We also change the SPI bus number to be taken from ssp->port_id instead of
platform device id. This way the supporting code that passes the ssp can
decide the number (or it can set it to the same as pdev->id).

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-08 11:00:32 +00:00
Mika Westerberg 0202775bc3 spi/pxa2xx-pci: switch to use pcim_* interfaces
Instead of open-coding all the error management in the driver we can take
advantage of the pcim_* interfaces that release the resources automatically.

We also use platform_device_register_full() to register the platform device
because it allows us to create and register the platform device at one go,
simplifying the error management.

This a preparatory step for getting rid of pxa_ssp_request()/free() which
we will do in the next patch.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-08 10:59:08 +00:00
Mark Brown e1b0f0df6a spi/s3c64xx: Complain if we fail to set a transfer speed
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-01-08 10:56:29 +00:00
Cyril Roelandt d3601e56cf spi/sh-hspi: fix return value check in hspi_probe().
According to its documentation, clk_get() returns a "valid IS_ERR() condition
containing errno", so we should call IS_ERR() rather than a NULL check.

Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-19 15:11:41 +00:00
Jean-Christophe PLAGNIOL-VILLARD 850a5b670a spi/atmel: add DT support
Use the newly introduce cs-gpios dt support on atmel.
We do not use the hardware cs as it's wired and has bugs and limitations.
As the controller believes that only active-low devices/systems exists.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-17 17:11:32 +00:00
David Daney cb71941a68 of/spi: Fix SPI module loading by using proper "spi:" modalias prefixes.
To get modprobe to automatically load the proper modules, we need to
prefix things with "spi:".  Partially based on Grant Likely's suggestions.

Signed-off-by: David Daney <david.daney@cavium.com>
[grant.likely: reworked because drivers/of/of_spi.c has been removed]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-15 00:49:35 +00:00
Kyoungil Kim 7d859ff493 spi: Change FIFO flush operation and spi channel off
Setting SW_RST does TX/RX FIFO flush.
After FIFO flush, SW_RST should be cleared.
The above setting and clearing SW_RST operation should be done after spi channel off.

Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-15 00:49:34 +00:00
Kyoungil Kim 6f38010d54 spi: Keep chipselect assertion during one message
During all transfers in one message, the device will not be chagned.
So we don't need to deassert chipselect during one message.

Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-15 00:49:33 +00:00
Linus Torvalds d3b43e12b2 SPI changes for v3.8
Primarily SPI device driver bug fixes, one removal of an old driver, and
 some new tegra support. There is some core code change too, but all in
 all pretty small stuff. The new features to note are:
 - Common code for describing GPIO CS lines in the device tree
 - Remove the SPI_BUFSIZ limitation on spi_write_the_read()
 - core spi ensures bits_per_word is set correctly
 - SPARC can now use SPI
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Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull SPI updates from Grant Likely:
 "Primarily SPI device driver bug fixes, one removal of an old driver,
  and some new tegra support.  There is some core code change too, but
  all in all pretty small stuff.

  The new features to note are:
   - Common code for describing GPIO CS lines in the device tree
   - Remove the SPI_BUFSIZ limitation on spi_write_the_read()
   - core spi ensures bits_per_word is set correctly
   - SPARC can now use SPI"

* tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6: (36 commits)
  spi/sparc: Allow of_register_spi_devices for sparc
  spi: Remove HOTPLUG section attributes
  spi: Add support for specifying 3-wire mode via device tree
  spi: Fix comparison of different integer types
  spi/orion: Add SPI_CHPA and SPI_CPOL support to kirkwood driver.
  spi/sh: Add SH Mobile series as dependency to MSIOF controller
  spi/sh-msiof: Remove unneeded clock name
  spi: Remove SPI_BUFSIZ restriction on spi_write_then_read()
  spi/stmp: remove obsolete driver
  spi/clps711x: New SPI master driver
  spi: omap2-mcspi: remove duplicate inclusion of linux/err.h
  spi: omap2-mcspi: Fix the redifine warning
  spi/sh-hspi: add CS manual control support
  of_spi: add generic binding support to specify cs gpio
  spi: omap2-mcspi: remove duplicated include from spi-omap2-mcspi.c
  spi/bitbang: (cosmetic) simplify list manipulation
  spi/bitbang: avoid needless loop flow manipulations
  spi/omap: fix D0/D1 direction confusion
  spi: tegra: add spi driver for sflash controller
  spi: Dont call master->setup if not populated
  ...
2012-12-13 19:15:11 -08:00
Linus Torvalds 8287361abc ARM: arm-soc: Header cleanups
This is a collection of header file cleanups, mostly for OMAP and AT91,
 that keeps moving the platforms in the direction of multiplatform by
 removing the need for mach-dependent header files used in drivers and
 other places.
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Merge tag 'headers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC Header cleanups from Olof Johansson:
 "This is a collection of header file cleanups, mostly for OMAP and
  AT91, that keeps moving the platforms in the direction of
  multiplatform by removing the need for mach-dependent header files
  used in drivers and other places."

Fix up mostly trivial conflicts as per Olof.

* tag 'headers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (106 commits)
  ARM: OMAP2+: Move iommu/iovmm headers to platform_data
  ARM: OMAP2+: Make some definitions local
  ARM: OMAP2+: Move iommu2 to drivers/iommu/omap-iommu2.c
  ARM: OMAP2+: Move plat/iovmm.h to include/linux/omap-iommu.h
  ARM: OMAP2+: Move iopgtable header to drivers/iommu/
  ARM: OMAP: Merge iommu2.h into iommu.h
  atmel: move ATMEL_MAX_UART to platform_data/atmel.h
  ARM: OMAP: Remove omap_init_consistent_dma_size()
  arm: at91: move at91rm9200 rtc header in drivers/rtc
  arm: at91: move reset controller header to arm/arm/mach-at91
  arm: at91: move pit define to the driver
  arm: at91: move at91_shdwc.h to arch/arm/mach-at91
  arm: at91: move board header to arch/arm/mach-at91
  arn: at91: move at91_tc.h to arch/arm/mach-at91
  arm: at91 move at91_aic.h to arch/arm/mach-at91
  arm: at91 move board.h to arch/arm/mach-at91
  arm: at91: move platfarm_data to include/linux/platform_data/atmel.h
  arm: at91: drop machine defconfig
  ARM: OMAP: Remove NEED_MACH_GPIO_H
  ARM: OMAP: Remove unnecessary mach and plat includes
  ...
2012-12-12 11:45:16 -08:00
Linus Torvalds bad73c5aa0 ACPI and power management updates for 3.8-rc1
* Introduction of device PM QoS flags.
 
 * ACPI device power management update allowing subsystems other than
   PCI to use it more easily.
 
 * ACPI device enumeration rework allowing additional kinds of devices
   to be enumerated via ACPI.  From Mika Westerberg, Adrian Hunter,
   Mathias Nyman, Andy Shevchenko, and Rafael J. Wysocki.
 
 * ACPICA update to version 20121018 from Bob Moore and Lv Zheng.
 
 * ACPI memory hotplug update from Wen Congyang and Yasuaki Ishimatsu.
 
 * Introduction of acpi_handle_<level>() messaging macros and ACPI-based CPU
   hot-remove support from Toshi Kani.
 
 * ACPI EC updates from Feng Tang.
 
 * cpufreq updates from Viresh Kumar, Fabio Baltieri and others.
 
 * cpuidle changes to quickly notice governor prediction failure from
   Youquan Song.
 
 * Support for using multiple cpuidle drivers at the same time and cpuidle
   cleanups from Daniel Lezcano.
 
 * devfreq updates from Nishanth Menon and others.
 
 * cpupower update from Thomas Renninger.
 
 * Fixes and small cleanups all over the place.
 
 --
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Merge tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management updates from Rafael Wysocki:

 - Introduction of device PM QoS flags.

 - ACPI device power management update allowing subsystems other than
   PCI to use it more easily.

 - ACPI device enumeration rework allowing additional kinds of devices
   to be enumerated via ACPI.  From Mika Westerberg, Adrian Hunter,
   Mathias Nyman, Andy Shevchenko, and Rafael J. Wysocki.

 - ACPICA update to version 20121018 from Bob Moore and Lv Zheng.

 - ACPI memory hotplug update from Wen Congyang and Yasuaki Ishimatsu.

 - Introduction of acpi_handle_<level>() messaging macros and ACPI-based
   CPU hot-remove support from Toshi Kani.

 - ACPI EC updates from Feng Tang.

 - cpufreq updates from Viresh Kumar, Fabio Baltieri and others.

 - cpuidle changes to quickly notice governor prediction failure from
   Youquan Song.

 - Support for using multiple cpuidle drivers at the same time and
   cpuidle cleanups from Daniel Lezcano.

 - devfreq updates from Nishanth Menon and others.

 - cpupower update from Thomas Renninger.

 - Fixes and small cleanups all over the place.

* tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (196 commits)
  mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
  ACPI: add Haswell LPSS devices to acpi_platform_device_ids list
  ACPI: add documentation about ACPI 5 enumeration
  pnpacpi: fix incorrect TEST_ALPHA() test
  ACPI / PM: Fix header of acpi_dev_pm_detach() in acpi.h
  ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000
  ACPI : do not use Lid and Sleep button for S5 wakeup
  ACPI / PNP: Do not crash due to stale pointer use during system resume
  ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist
  ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set
  spi / ACPI: add ACPI enumeration support
  gpio / ACPI: add ACPI support
  PM / devfreq: remove compiler error with module governors (2)
  cpupower: IvyBridge (0x3a and 0x3e models) support
  cpupower: Provide -c param for cpupower monitor to schedule process on all cores
  cpupower tools: Fix warning and a bug with the cpu package count
  cpupower tools: Fix malloc of cpu_info structure
  cpupower tools: Fix issues with sysfs_topology_read_file
  cpupower tools: Fix minor warnings
  cpupower tools: Update .gitignore for files created in the debug directories
  ...
2012-12-11 12:45:35 -08:00
Andreas Larsson 7cb943615a spi/sparc: Allow of_register_spi_devices for sparc
The spi support code works on SPARC too. No reason to exclude it from
the party.

Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-10 22:31:37 +00:00
Grant Likely fd4a319bc9 spi: Remove HOTPLUG section attributes
CONFIG_HOTPLUG is going away as an option.  As result the __dev*
markings will be going away.

Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.

Bill Pemberton has done most of the legwork on this series. I've used
his script to purge the attributes from the drivers/gpio tree.

Reported-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-07 17:06:43 +00:00
Lars-Peter Clausen c20151dff8 spi: Add support for specifying 3-wire mode via device tree
This patch allows to specify that a SPI device is connected in 3-wire mode via
device tree.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-07 13:13:56 +00:00
Grant Likely 5323f49853 spi: Fix comparison of different integer types
Fix problem discovered with sparse:
+ drivers/spi/spi.c:1554:37: sparse: incompatible types in comparison expression (different signedness)
drivers/spi/spi.c: In function 'spi_write_then_read':
drivers/spi/spi.c:1554:23: warning: comparison of distinct pointer types lacks a cast [enabled by default]

The change to SPI_BUFSIZ was introduced in commit b3a223ee2, "spi:
Remove SPI_BUFSIZ restriction on spi_write_then_read()"

Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 23:34:11 +00:00
Jason Gunthorpe b15d5d7004 spi/orion: Add SPI_CHPA and SPI_CPOL support to kirkwood driver.
Support these transfer modes from the SPI layer by setting
the appropriate register bits before doing the transfer.

This was tested on the Marvell kirkwood SOC that uses this driver.

Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 14:24:52 +00:00
Bastian Hecht 746aeffdd9 spi/sh: Add SH Mobile series as dependency to MSIOF controller
The MSIOF hardware block is used in the SH Mobile series as well, so we
add it here.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 14:05:54 +00:00
Bastian Hecht 078b6ead72 spi/sh-msiof: Remove unneeded clock name
clk_get() no longer needs a character string for associating the right
clock as this is done via the device struct now.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 14:05:00 +00:00
Mark Brown b3a223ee2d spi: Remove SPI_BUFSIZ restriction on spi_write_then_read()
In order to avoid constantly allocating and deallocating there is a fixed
buffer which spi_write_then_read() uses for transfers, with an early error
check to ensure that the transfer fits within the buffer. This limits the
size of transfers to this size, currently max(32, SMP_CACHE_BYTES).

Since we can dynamically allocate and in fact already have a fallback
to do so when there is contention for the fixed buffer remove this
restriction and instead dynamically allocate a suitably sized buffer if
the transfer won't fit.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 14:03:14 +00:00
Wolfram Sang 266904c779 spi/stmp: remove obsolete driver
This driver is obsolete and can't even be built anymore since the
platform it depends has been removed.

The STMP series is completely covered by the MXS platform these days, so
spi-mxs can be used instead.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-06 14:02:53 +00:00
Grant Likely a34fc82e23 Merge branch 'spi-next' from git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git
Pull in the changes Mark has queued up for SPI
2012-12-06 13:58:31 +00:00
Alexander Shiyan 161b96c383 spi/clps711x: New SPI master driver
This patch add new driver for CLPS711X SPI master controller.
Due to platform limitations driver supports only 8 bit transfer mode.
Chip select control is handled via GPIO.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-12-05 23:14:38 +00:00
Sachin Kamat 227c4ce6ea spi: omap2-mcspi: remove duplicate inclusion of linux/err.h
linux/err.h was included twice.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-12-03 00:17:55 +09:00
Shubhrajyoti D 6a47d80308 spi: omap2-mcspi: Fix the redifine warning
Fix the below warning
drivers/spi/spi-omap2-mcspi.c:336:34: warning: symbol 'tx' shadows an earlier one
drivers/spi/spi-omap2-mcspi.c:327:12: originally declared here

So delete the u8 tx as it is assigned and not used(resigned afterwards).

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-12-03 00:17:50 +09:00
Mika Westerberg 64bee4d28c spi / ACPI: add ACPI enumeration support
ACPI 5 introduced SPISerialBus resource that allows us to enumerate and
configure the SPI slave devices behind the SPI controller. This patch adds
support for this to the SPI core.

In addition we bind ACPI nodes to SPI devices. This makes it possible for
the slave drivers to get the ACPI handle for further configuration.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-30 12:37:53 +01:00
Alexander Sverdlin f3b6159e6a of/spi: Honour "status=disabled" property of device
Currently of_register_spi_devices() function registers all SPI devices,
independetly from their status property in device tree. According to
"ePAPR 1.1" spec, device should only be registered if there is no
"status" property, or it has "ok" (or "okay") value (see
of_device_is_available()). In case of "platform devices",
of_platform_device_create_pdata() checks for "status" and ensures
that disabled devices are not pupulated. But such check for SPI buses
was missing until now. Fix it.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@sysgo.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-29 17:36:57 +00:00
Phil Edworthy ce32930586 spi/sh-hspi: add CS manual control support
The current HSPI driver used automatic CS control, leading to CS
active for each byte transmitted. This patch changes the driver
to manual CS control, and ensures CS is active thoughout a whole
message. Additionally, it uses the cs_change field to determine
if CS is disabled between transfers in the message.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-23 09:52:43 +00:00
Jean-Christophe PLAGNIOL-VILLARD 7431798490 of_spi: add generic binding support to specify cs gpio
This will allow to use gpio for chip select with no modification in the
driver binding

When use the cs-gpios, the gpio number will be passed via the cs_gpio field
and the number of chip select will automatically increased with max(hw cs, gpio cs).

So if for example the controller has 2 CS lines, and the cs-gpios
property looks like this:

cs-gpios = <&gpio1 0 0> <0> <&gpio1 1 0> <&gpio1 2 0>;

Then it should be configured so that num_chipselect = 4 with the
following mapping:

cs0 : &gpio1 0 0
cs1 : native
cs2 : &gpio1 1 0
cs3 : &gpio1 2 0

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: spi-devel-general@lists.sourceforge.net
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
[grant.likely: fixed up type of cs count so min() can do type checking]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-21 23:25:33 +00:00
Wei Yongjun 15d0983f5c spi: omap2-mcspi: remove duplicated include from spi-omap2-mcspi.c
Remove duplicated include.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-14 15:41:38 +00:00
Guennadi Liakhovetski edba9bf99d spi/bitbang: (cosmetic) simplify list manipulation
Use a proper list iterator instead of an open-coded loop and remove a
superfluous list head initialisation.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-14 15:38:15 +00:00
Guennadi Liakhovetski b82b576bc7 spi/bitbang: avoid needless loop flow manipulations
This patch makes a loop look cleaner by replacing a "break" and a "continue"
in its body by a single "if".

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-11-14 15:38:15 +00:00
Mark Brown 170c2d0a87 Merge branch 'spi-mcspi' into spi-next 2012-11-14 12:16:50 +09:00
Daniel Mack 2cd451792d spi/omap: fix D0/D1 direction confusion
0384e90b8 ("spi/mcspi: allow configuration of pin directions") did what
it claimed to do the wrong way around. D0/D1 is configured as output by
*clearing* the bits in the conf registers, hence also breaking the
former default behaviour.

Fix this before that change is merged to mainline.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-14 12:16:17 +09:00
Mark Brown 8266bdd2d7 Merge branch 'spi-tegra' into spi-next 2012-11-14 11:05:08 +09:00
Laxman Dewangan 8528547bcc spi: tegra: add spi driver for sflash controller
NVIDIA's Tegra20 have the SPI (SFLASH) controller to
interface with spi flash device which is used for system
boot. Add the spi driver for this controller.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-14 11:04:53 +09:00
Mark Brown 19f15f0efd Merge branches 'spi-core' and 'spi-tegra' into spi-next 2012-11-09 16:47:00 +00:00
Laxman Dewangan caae070c48 spi: Dont call master->setup if not populated
Currently the master->setup() is called unconditionally.
The assumption is that every driver need to implement this
callback. This encourages drivers to populate empty functions
to prevent crashing.

This patch prevents the call of master->setup() if it is not
populated.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-09 16:46:48 +00:00
Laxman Dewangan 24bc897161 spi: tegra: sequence compatible strings as per preference
Sequence compatible list for tegra20-slink driver to first
look for Tegra30 and then Tegra20. Tegra30 have additional
feature in HW which need to be utilize if it is provided from DT.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-09 16:43:07 +00:00
Laxman Dewangan e6811d1d7a spi: make sure all transfer has bits_per_word set
When spi client does the spi transfer and does not sets
the bits_per_word for each transfer then set it as default
of spi device in spi core before calling low level transfer.

Removing the similar code from spi-tegra20-slink driver as
it is not required.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-09 16:42:17 +00:00
Mark Brown fad8f9c0b2 Merge branch 'spi-fix-s3c64xx' into spi-next 2012-11-07 09:22:32 +01:00
Abhilash Kesavan 45e5033851 spi: s3c64xx: Add fix for crash in spi suspend/resume
The SPI driver makes a gpio_request during initialization. The requested
gpios need to be populated as part of the s3c64xx_spi_driver_data so that
they can be released during suspend and requested again during resume.

Add the missing code to save the requested gpios as part of the driver
data. This fixes a SPI driver suspend crash.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-07 09:22:21 +01:00
Jean-Christophe PLAGNIOL-VILLARD bcd2360c1f arm: at91: move platfarm_data to include/linux/platform_data/atmel.h
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
2012-11-06 20:29:33 +08:00
Mark Brown 70324494b6 Merge branch 'spi-linus' into spi-next 2012-11-06 10:03:29 +01:00
Shubhrajyoti D e47a682ace spi: omap2-mcspi: Reorder the wait_for_completion for tx
The commit  d7b4394e[Cleanup the omap2_mcspi_txrx_dma function]
changed the wait_for_completion order. Move the wait so that the
rx doesnot wait for the tx to complete.

Reported-and-tested-by: Sørensen, Stefan <Sorensen@polycom.com>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-06 10:03:03 +01:00
Mark Brown 73b5301b02 Merge branch 'spi-spidev' into spi-next 2012-11-01 14:55:10 +00:00
Maxime Ripard 8fad805bdc spi: spidev: Add Rohm DH2228FV DAC compatible string
Since we don't have a driver for it yet, use spidev instead.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-01 14:54:47 +00:00
Maxime Ripard 880cfd43ea spi: spidev: Add device tree bindings
This will allow to probe spidev from device tree by adding the
compatible string of each device to this array.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-11-01 14:54:47 +00:00
Mark Brown 31271e9aac Merge branch 'spi-tegra' into spi-next 2012-10-30 18:39:02 +00:00
Laxman Dewangan dc4dc36056 spi: tegra: add spi driver for SLINK controller
Tegra20/Tegra30 supports the spi interface through its SLINK
controller. Add spi driver for SLINK controller.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-30 18:38:35 +00:00
Linus Torvalds 8e99165a6f spi: Some minor MXS fixes
These fixes are both pretty minor ones and are driver local.
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Merge tag 'spi-mxs' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

Pull minor spi MXS fixes from Mark Brown:
 "These fixes are both pretty minor ones and are driver local."

* tag 'spi-mxs' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc:
  spi: mxs: Terminate DMA in case of DMA timeout
  spi: mxs: Assign message status after transfer finished
2012-10-28 11:13:54 -07:00
Linus Torvalds 4864ccbb5a spi: Fixes for v3.7
A bunch of fixes here, mostly minor except for the pl022 which has just
 been a bit of a shambles all round, the recent runtime PM changes have
 as far as I can tell never worked so they're just getting thrown out.
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Merge tag 'spi-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

Pull spi fixes from Mark Brown:
 "A bunch of fixes here, mostly minor except for the pl022 which has
  just been a bit of a shambles all round, the recent runtime PM changes
  have as far as I can tell never worked so they're just getting thrown
  out."

* tag 'spi-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc:
  spi/pl022: Revert recent runtime PM changes
  spi: tsc2005: delete soon-obsolete e-mail address
  spi: spi-rspi: fix build error for the latest shdma driver
2012-10-24 18:00:17 -07:00
Mark Brown 32111abb50 spi: Fixes for v3.7
A bunch of fixes here, mostly minor except for the pl022 which has just
 been a bit of a shambles all round, the recent runtime PM changes have
 as far as I can tell never worked so they're just getting thrown out.
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Merge tag 'spi-linus' into spi-next

spi: Fixes for v3.7

A bunch of fixes here, mostly minor except for the pl022 which has just
been a bit of a shambles all round, the recent runtime PM changes have
as far as I can tell never worked so they're just getting thrown out.

Conflicts:
	drivers/spi/spi-pl022.c
2012-10-23 14:02:21 +01:00
Ulf Hansson 213d27a42c spi/pl022: Revert recent runtime PM changes
[Originally sent by Ulf as two changes, squashed down into one with a
redone changelog, thanks to Russell King for analysis. -- broonie]

This reverts commit 688723 (spi/pl022: enable runtime PM) and commit
2fb30d (spi/pl022: fix spi-pl022 pm enable at probe).

Commit "spi/pl022: enable runtime PM" introduced runtime PM issues as it
interacted badly with the work Russell King had done to move core
runtime PM handling into the bus.  Due to that commit, "spi/pl022: fix
spi-pl022 pm enable at probe" was merged to fix part of those issues.

Instead of adding another fix, let's clean up and revert everything
back to when it was already fine.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Revert "spi/pl022: enable runtime PM"

Conflicts:
	drivers/spi/spi-pl022.c
2012-10-23 13:27:30 +01:00
Olof Johansson 068a565afa Merge branch 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes
A collection of warning fixes on non-ARM code from Arnd Bergmann:

* 'testing/driver-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: s3c: mark s3c2440_clk_add as __init_refok
  spi/s3c64xx: use correct dma_transfer_direction type
  pcmcia: sharpsl: don't discard sharpsl_pcmcia_ops
  USB: EHCI: mark ehci_orion_conf_mbus_windows __devinit
  mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN
  SCSI: ARM: make fas216_dumpinfo function conditional
  SCSI: ARM: ncr5380/oak uses no interrupts
2012-10-19 15:40:18 -07:00
Arnd Bergmann c10356b984 spi/s3c64xx: use correct dma_transfer_direction type
There is a subtle difference between dma_transfer_direction and
dma_data_direction: the former is used by the dmaengine framework,
while the latter is used by the dma-mapping API. Although the
purpose is comparable, the actual values are different and must
not be mixed. In this case, the driver just wants to use
dma_transfer_direction.

Without this patch, building s3c6400_defconfig results in:

drivers/spi/spi-s3c64xx.c: In function 's3c64xx_spi_dmacb':
drivers/spi/spi-s3c64xx.c:239:21: warning: comparison between
	'enum dma_data_direction' and 'enum dma_transfer_direction' [-Wenum-compare]

As pointed out by Kukjin Kim, this also changes the use of constants
from DMA_FROM_DEVICE/DMA_TO_DEVICE to DMA_DEV_TO_MEM/DMA_MEM_TO_DEV.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: spi-devel-general@lists.sourceforge.net
2012-10-17 15:25:23 +02:00
Mark Brown b4482afeb7 Merge branch 'spi-pl022' into spi-next 2012-10-17 22:14:35 +09:00
Patrice Chotard d8f18420c5 spi/pl022: add IDLE state pin management
This commit allow to put pins in IDLE state in
runtime_suspend and in SLEEP state in suspend, corresponding
to defined semantics in <linux/pinctrl/pinctrl-state.h>.

To do this, just add a boolean parameter runtime
to pl022_resume_resources/pl022_suspend_resources which
indicates if it's called from PM_RUNTIME callbacks or not.

Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 22:14:25 +09:00
Ulf Hansson 4964a26df7 spi/pl022: Activate resourses before deactivate them in suspend
To be able to deactivate resourses in suspend, the resourses must
first be surely active. This is done with a pm_runtime_get_sync.
Once the resourses are restored to active state again in resume,
the runtime pm usage count can be decreased with a pm_runtime_put.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 22:14:24 +09:00
Ulf Hansson 0df3499457 spi/pl022: Minor simplification for runtime pm
In probe pm_runtime_put_autosuspend has the same effect as doing
pm_runtime_put. This due to upper layer in driver core is preventing
the device from being runtime suspended by a pm_runtime_get*.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 22:14:18 +09:00
Mark Brown ef5347c63f Merge branch 'spi-linus', remote-tracking branches 'misc/spi/bcm63xx', 'misc/spi/mcspi', 'misc/spi/mxs' and 'misc/spi/s3c64xx' into spi-next 2012-10-17 16:33:23 +09:00
Ulf Hansson 5015a2e167 spi/pl022: Revert "spi/pl022: fix spi-pl022 pm enable at probe"
This reverts commit 6887237cd7.

Commit "spi/pl022: enable runtime PM" introduced runtime PM issues.
Due to that commit, "spi/pl022: fix spi-pl022 pm enable at probe"
was merged to fix part of those issues.

Instead of adding another fix, let's clean up and revert everything
back to when it was already fine.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:32:46 +09:00
Shimoda, Yoshihiro 0243c53634 spi: spi-rspi: fix build error for the latest shdma driver
Because the latest shdma driver changed, it caused build error in
the spi-rspi driver. This patch fixed the build error.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:32:46 +09:00
Daniel Mack 0384e90b85 spi/mcspi: allow configuration of pin directions
Allow D0 to be an input and D1 to be an output, configurable via
platform data and a new DT property.

Based on a patch from  Matus Ujhelyi <matus.ujhelyi@streamunlimited.com>

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:26:51 +09:00
Florian Fainelli b308fb208e spi/bcm63xx: remove useless call to bcm63xx_spi_check_transfer()
Calling bcm63xx_spi_check_transfer() with a NULL argument does not do
anything useful that the core spi code is not doing already, remove
this superfluous call.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:13:25 +09:00
Florian Fainelli 965199573a spi/bcm63xx: add missing spi_master_{resume,suspend} calls to PM callbacks
The PM callbacks implemented by the spi-bcm63xx driver don't call
spi_master_{resume,suspend}, fix that.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:13:25 +09:00
Florian Fainelli 61d1596317 spi/bcm63xx: remove driver version
As Grant Likely reported, this does not make any sense in a mainline kernel
remove that driver version string.

Reported-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:13:24 +09:00
Thomas Abraham 9f667bff0f spi/s3c64xx: use clk_prepare_enable and clk_disable_unprepare
Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare
calls as required by common clock framework.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:12:29 +09:00
Marek Vasut 44968466cf spi: mxs: Terminate DMA in case of DMA timeout
In case the SPI DMA times out, the DMA might still be in some kind of
inconsistent state. Issue dmaengine_terminate_all() on the particular
channel to kill off all operations before continuing.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:11:09 +09:00
Marek Vasut d856f1eb56 spi: mxs: Assign message status after transfer finished
In the current code implementing the MXS SPI driver, every transferred
message had assigned status = 0, which is not correct. Properly assign
status returned from the I/O functions.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17 16:10:35 +09:00
Linus Torvalds b7e97d2211 Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma
Pull slave-dmaengine updates from Vinod Koul:
 "This time we have Andy updates on dw_dmac which is attempting to make
  this IP block available as PCI and platform device though not fully
  complete this time.

  We also have TI EDMA moving the dma driver to use dmaengine APIs, also
  have a new driver for mmp-tdma, along with bunch of small updates.

  Now for your excitement the merge is little unusual here, while
  merging the auto merge on linux-next picks wrong choice for pl330
  (drivers/dma/pl330.c) and this causes build failure.  The correct
  resolution is in linux-next.  (DMA: PL330: Fix build error) I didn't
  back merge your tree this time as you are better than me so no point
  in doing that for me :)"

Fixed the pl330 conflict as in linux-next, along with trivial header
file conflicts due to changed includes.

* 'next' of git://git.infradead.org/users/vkoul/slave-dma: (29 commits)
  dma: tegra: fix interrupt name issue with apb dma.
  dw_dmac: fix a regression in dwc_prep_dma_memcpy
  dw_dmac: introduce software emulation of LLP transfers
  dw_dmac: autoconfigure data_width or get it via platform data
  dw_dmac: autoconfigure block_size or use platform data
  dw_dmac: get number of channels from hardware if possible
  dw_dmac: fill optional encoded parameters in register structure
  dw_dmac: mark dwc_dump_chan_regs as inline
  DMA: PL330: return ENOMEM instead of 0 from pl330_alloc_chan_resources
  DMA: PL330: Remove redundant runtime_suspend/resume functions
  DMA: PL330: Remove controller clock enable/disable
  dmaengine: use kmem_cache_zalloc instead of kmem_cache_alloc/memset
  DMA: PL330: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
  ARM: EXYNOS: Set the capability of pdm0 and pdm1 as DMA_PRIVATE
  dma: tegra: use list_move_tail instead of list_del/list_add_tail
  mxs/dma: Enlarge the CCW descriptor area to 4 pages
  dw_dmac: utilize slave_id to pass request line
  dmaengine: mmp_tdma: add dt support
  dmaengine: mmp-pdma support
  spi: davici - make davinci select edma
  ...
2012-10-10 11:10:41 +09:00
Linus Torvalds de390bba79 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS update from Ralf Baechle:
 "This is the MIPS update for 3.7.

  A fair chunk of them are platform updates to the Cavium Octeon SOC
  (which involves machine generated header files of considerable size),
  Atheros ATH79xx, RMI aka Netlogic aka Broadcom XLP, Broadcom BCM63xx
  platforms.

  Support for the commercial MIPS simulator MIPSsim has been removed as
  MIPS Technologies is shifting away from this product and Qemu is
  offering various more powerful platforms.  The generic MIPS code can
  now also probe for no-execute / write-only TLB features implemented
  without the full SmartMIPS extension as permitted by the latest MIPS
  processor architecture.  Lots of small changes to generic code."

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (78 commits)
  MIPS: ath79: Fix CPU/DDR frequency calculation for SRIF PLLs
  MIPS: ath79: use correct fractional dividers for {CPU,DDR}_PLL on AR934x
  MIPS: BCM63XX: Properly handle mac address octet overflow
  MIPS: Kconfig: Avoid build errors by hiding USE_OF from the user.
  MIPS: Replace `-' in defconfig filename wth `_' for consistency.
  MIPS: Wire kcmp syscall.
  MIPS: MIPSsim: Remove the MIPSsim platform.
  MIPS: NOTIFY_RESUME is not needed in TIF masks
  MIPS: Merge the identical "return from syscall" per-ABI code
  MIPS: Unobfuscate _TIF..._MASK
  MIPS: Prevent hitting do_notify_resume() with !user_mode(regs).
  MIPS: Replace 'kernel_uses_smartmips_rixi' with 'cpu_has_rixi'.
  MIPS: Add base architecture support for RI and XI.
  MIPS: Optimise TLB handlers for MIPS32/64 R2 cores.
  MIPS: uasm: Add INS and EXT instructions.
  MIPS: Avoid pipeline stalls on some MIPS32R2 cores.
  MIPS: Make VPE count to be one-based.
  MIPS: Add new end of interrupt functionality for GIC.
  MIPS: Add EIC support for GIC.
  MIPS: Code clean-ups for the GIC.
  ...
2012-10-09 16:08:04 +09:00
Linus Torvalds 5e090ed7af ARM: soc: late platform updates
This branch contains updates to OMAP and Marvell platforms (kirkwood,
 dove, mvebu) that came in after we had done the big multiplatform merges,
 so they were kept separate from the rest, and not separated into the
 traditional topics of cleanup/driver/platform features.
 
 For OMAP, the updates are:
 - Runtime PM conversions for the GPMC and RNG IP blocks
 - Preparation patches for the OMAP common clock framework conversion
 - clkdev alias additions required by other drivers
 - Performance Monitoring Unit (PMU) support for OMAP2, 3, and non-4430 OMAP4
 - OMAP hwmod code and data improvements
 - Preparation patches for the IOMMU runtime PM conversion
 - Preparation patches for OMAP4 full-chip retention support
 
 For Kirkwood/Dove/mvebu:
 
 - New driver for "address decoder controller" for mvebu, which
   is a piece of hardware that configures addressable devices and
   peripherals. First user is the boot rom aperture on armada XP since
   it is needed for SMP support.
 - New device tree bindings for peripherals such as gpio-fan, iconnect
   nand, mv_cesa and the above address decoder controller.
 - Some defconfig updates, mostly to enable new DT boards and a few drivers.
 - New drivers using the pincontrol subsystem for dove, kirkwood and mvebu
 - New clean gpio driver for mvebu
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Merge tag 'soc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull late ARM soc platform updates from Olof Johansson:
 "This branch contains updates to OMAP and Marvell platforms (kirkwood,
  dove, mvebu) that came in after we had done the big multiplatform
  merges, so they were kept separate from the rest, and not separated
  into the traditional topics of cleanup/driver/platform features.

  For OMAP, the updates are:
   - Runtime PM conversions for the GPMC and RNG IP blocks
   - Preparation patches for the OMAP common clock framework conversion
   - clkdev alias additions required by other drivers
   - Performance Monitoring Unit (PMU) support for OMAP2, 3, and
     non-4430 OMAP4
   - OMAP hwmod code and data improvements
   - Preparation patches for the IOMMU runtime PM conversion
   - Preparation patches for OMAP4 full-chip retention support

  For Kirkwood/Dove/mvebu:
   - New driver for "address decoder controller" for mvebu, which is a
     piece of hardware that configures addressable devices and
     peripherals.  First user is the boot rom aperture on armada XP
     since it is needed for SMP support.
   - New device tree bindings for peripherals such as gpio-fan, iconnect
     nand, mv_cesa and the above address decoder controller.
   - Some defconfig updates, mostly to enable new DT boards and a few
     drivers.
   - New drivers using the pincontrol subsystem for dove, kirkwood and
     mvebu
   - New clean gpio driver for mvebu"

* tag 'soc-late' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (98 commits)
  ARM: mvebu: fix build breaks from multi-platform conversion
  ARM: OMAP4460/4470: PMU: Enable PMU for OMAP4460/70
  ARM: OMAP2+: PMU: Add runtime PM support
  ARM: OMAP4430: PMU: prepare to create PMU device via HWMOD
  ARM: OMAP2+: PMU: Convert OMAP2/3 devices to use HWMOD
  ARM: OMAP3: hwmod data: Add debugss HWMOD data
  ARM: OMAP2+: clockdomain/hwmod: add workaround for EMU clockdomain idle problems
  ARM: OMAP: Add a timer attribute for timers that can interrupt the DSP
  hwrng: OMAP: remove SoC restrictions from driver registration
  ARM: OMAP: split OMAP1, OMAP2+ RNG device registration
  hwrng: OMAP: convert to use runtime PM
  hwrng: OMAP: store per-device data in per-device variables, not file statics
  ARM: OMAP2xxx: hwmod/CM: add RNG integration data
  ARM: OMAP2+: gpmc: minimal driver support
  ARM: OMAP2+: gpmc: Adapt to HWMOD
  ARM: OMAP2/3: hwmod data: add gpmc
  ARM: OMAP4: hwmod data: add mmu hwmod for ipu and dsp
  ARM: OMAP3: hwmod data: add mmu data for iva and isp
  ARM: OMAP: iommu: fix including iommu.h without IOMMU_API selected
  ARM: OMAP4: hwmod data: add missing HWMOD_NO_IDLEST flags to some PRCM IP blocks
  ...
2012-10-07 20:55:16 +09:00
Ralf Baechle 382fc33b4a Merge branch 'master' of git://dev.phrozen.org/mips-next into mips-for-linux-next 2012-10-05 15:56:28 +02:00
Olof Johansson 54d69df584 Merge branch 'late/kirkwood' into late/soc
Merge in the late Kirkwood branch with the OMAP late branch for upstream
submission.

Final contents described in shared tag.

Fixup remove/change conflicts in arch/arm/mach-omap2/devices.c and
drivers/spi/spi-omap2-mcspi.c.

Signed-off-by: Olof Johansson <olof@lixom.net>
2012-10-04 20:17:25 -07:00
Linus Torvalds a54dfb1a84 Devicetree updates for 3.7
- Import of latest upstream device tree compiler (dtc)
 - New function of_get_child_by_name
 - Support for #size-cells of 0 and #addr-cells of >2
 - Couple of DT binding documentation updates
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Merge tag 'dt-for-3.7' of git://sources.calxeda.com/kernel/linux

Pull devicetree updates from Rob Herring:
 - Import of latest upstream device tree compiler (dtc)
 - New function of_get_child_by_name
 - Support for #size-cells of 0 and #addr-cells of >2
 - Couple of DT binding documentation updates

Fix up trivial conflicts due to of_get_child_by_name() having been added
next to the new of_get_next_available_child().

* tag 'dt-for-3.7' of git://sources.calxeda.com/kernel/linux:
  MAINTAINERS: add scripts/dtc under Devicetree maintainers
  dtc: import latest upstream dtc
  dt: Document general interrupt controller bindings
  dt/s3c64xx/spi: Use of_get_child_by_name to get a named child
  dt: introduce of_get_child_by_name to get child node by name
  of: i2c: add support for wakeup-source property
  of/address: Handle #address-cells > 2 specially
  DT: export of_irq_to_resource_table()
  devicetree: serial: Add documentation for imx serial
  devicetree: pwm: mxs-pwm.txt: Fix reg field annotation
  of: Allow busses with #size-cells=0
2012-10-03 09:44:08 -07:00
Linus Torvalds 7fe0b14b72 spi: Updates for v3.7
No framework work here, only a bunch of driver updates of varying sizes:
 
 - Factoring out of the core hardware support from the MXS MMC driver by
   Marek Vasut to allow the hardware to also be used for SPI.
 - Lots of error handling cleanups from Guenter Roeck
 - Removal of the existing Tegra driver which is quite comprehensively
   broken as detailed in the changelog for the removal.
 - DT suppport for the PL022 and GPIO drivers.
 - pinctrl support for OMAP and PL022.
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Merge tag 'spi-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc

Pull spi updates from Mark Brown:
 "No framework work here, only a bunch of driver updates of varying
  sizes:

   - Factoring out of the core hardware support from the MXS MMC driver
     by Marek Vasut to allow the hardware to also be used for SPI.
   - Lots of error handling cleanups from Guenter Roeck
   - Removal of the existing Tegra driver which is quite comprehensively
     broken as detailed in the changelog for the removal.
   - DT suppport for the PL022 and GPIO drivers.
   - pinctrl support for OMAP and PL022."

Pulling from Mark Brown as Grant Likely is still busy moving.

* tag 'spi-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc: (53 commits)
  spi: remove completely broken Tegra driver
  spi/imx: set the inactive state of the clock according to the clock polarity
  spi/pl022: get/put resources on suspend/resume
  spi/pl022: use more managed resources
  spi/pl022: Devicetree support w/o platform data
  spi/s3c64xx: Don't free controller_data on non-dt platforms
  spi: omap2-mcspi: add pinctrl support
  spi/pl022: adopt pinctrl support
  spi: omap2-mcspi: Cleanup the omap2_mcspi_txrx_dma function
  spi/gpio: Fix stub for spi_gpio_probe_dt()
  spi/mxs: Make the SPI block clock speed configurable via DT
  spi: spi-sh-hspi: drop frees of devm_ alloc'd data
  spi/pl022: Fix chipselects pointer computation
  spi: spi-tle62x0: Use module_spi_driver macro
  mxs/spi: Rework the mxs_ssp_timeout to be more readable
  mxs/spi: Decrement the DMA/PIO border
  mxs/spi: Increment the transfer length only if transfer succeeded
  mxs/spi: Fix issues when doing long continuous transfer
  spi: spi-gpio: Add DT bindings
  spi: spi-gpio: store chipselect information in private structure
  ...
2012-10-02 17:26:42 -07:00
Linus Torvalds 9cd11c0c47 ARM: soc: multiplatform enablement
This is a pretty significant branch. It's the introduction of the
 first multiplatform support on ARM, and with this (and the later
 branch) merged, it is now possible to build one kernel that contains
 support for highbank, vexpress, mvebu, socfpga, and picoxcell. More
 platforms will be convered over in the next few releases.
 
 Two critical last things had to be done for this to be practical and
 possible:
 * Today each platform has its own include directory under
   mach-<mach>/include/mach/*, and traditionally that is where a lot of
   driver/platform shared definitions have gone, such as platform data
   structures. They now need to move out to a common location instead,
   and this branch moves a large number of those out to
   include/linux/platform_data.
 * Each platform used to list the device trees to compile for its
   boards in mach-<mach>/Makefile.boot.
 
 Both of the above changes will mean that there are some merge
 conflicts to come (and some to resolve here). It's a one-time move and
 once it settles in, we should be good for quite a while. Sorry for the
 overhead.
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Merge tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM soc multiplatform enablement from Olof Johansson:
 "This is a pretty significant branch.  It's the introduction of the
  first multiplatform support on ARM, and with this (and the later
  branch) merged, it is now possible to build one kernel that contains
  support for highbank, vexpress, mvebu, socfpga, and picoxcell.  More
  platforms will be convered over in the next few releases.

  Two critical last things had to be done for this to be practical and
  possible:
   * Today each platform has its own include directory under
     mach-<mach>/include/mach/*, and traditionally that is where a lot
     of driver/platform shared definitions have gone, such as platform
     data structures.  They now need to move out to a common location
     instead, and this branch moves a large number of those out to
     include/linux/platform_data.
   * Each platform used to list the device trees to compile for its
     boards in mach-<mach>/Makefile.boot.

  Both of the above changes will mean that there are some merge
  conflicts to come (and some to resolve here).  It's a one-time move
  and once it settles in, we should be good for quite a while.  Sorry
  for the overhead."

Fix conflicts as per Olof.

* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
  ARM: add v7 multi-platform defconfig
  ARM: msm: Move core.h contents into common.h
  ARM: highbank: call highbank_pm_init from .init_machine
  ARM: dtb: move all dtb targets to common Makefile
  ARM: spear: move platform_data definitions
  ARM: samsung: move platform_data definitions
  ARM: orion: move platform_data definitions
  ARM: vexpress: convert to multi-platform
  ARM: initial multiplatform support
  ARM: mvebu: move armada-370-xp.h in mach dir
  ARM: vexpress: remove dependency on mach/* headers
  ARM: picoxcell: remove dependency on mach/* headers
  ARM: move all dtb targets out of Makefile.boot
  ARM: picoxcell: move debug macros to include/debug
  ARM: socfpga: move debug macros to include/debug
  ARM: mvebu: move debug macros to include/debug
  ARM: vexpress: move debug macros to include/debug
  ARM: highbank: move debug macros to include/debug
  ARM: move debug macros to common location
  ARM: make mach/gpio.h headers optional
  ...
2012-10-01 19:11:38 -07:00
Linus Torvalds 61464c8357 ARM: soc: general cleanups
This is a large branch that contains a handful of different cleanups:
 
 - Fixing up the I/O space remapping on PCI on ARM. This is a series
   from Rob Herring that restructures how all pci devices allocate I/O
   space, and it's part of the work to allow multiplatform kernels.
 - A number of cleanup series for OMAP, moving and removing some
   headers, sparse irq rework and in general preparation for
   multiplatform.
 - Final removal of all non-DT boards for Tegra, it is now
   device-tree-only!
 - Removal of a stale platform, nxp4008. It's an old mobile chipset
   that is no longer in use, and was very likely never really used with
   a mainline kernel. We have not been able to find anyone interested
   in keeping it around in the kernel.
 - Removal of the legacy dmaengine driver on tegra
 
 + A handful of other things that I haven't described above.
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Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM soc general cleanups from Olof Johansson:
 "This is a large branch that contains a handful of different cleanups:

   - Fixing up the I/O space remapping on PCI on ARM.  This is a series
     from Rob Herring that restructures how all pci devices allocate I/O
     space, and it's part of the work to allow multiplatform kernels.
   - A number of cleanup series for OMAP, moving and removing some
     headers, sparse irq rework and in general preparation for
     multiplatform.
   - Final removal of all non-DT boards for Tegra, it is now
     device-tree-only!
   - Removal of a stale platform, nxp4008.  It's an old mobile chipset
     that is no longer in use, and was very likely never really used
     with a mainline kernel.  We have not been able to find anyone
     interested in keeping it around in the kernel.
   - Removal of the legacy dmaengine driver on tegra

  + A handful of other things that I haven't described above."

Fix up some conflicts with the staging tree (and because nxp4008 was
removed)

* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (184 commits)
  ARM: OMAP2+: serial: Change MAX_HSUART_PORTS to 6
  ARM: OMAP4: twl-common: Support for additional devices on i2c1 bus
  ARM: mmp: using for_each_set_bit to simplify the code
  ARM: tegra: harmony: fix ldo7 regulator-name
  ARM: OMAP2+: Make omap4-keypad.h local
  ARM: OMAP2+: Make l4_3xxx.h local
  ARM: OMAP2+: Make l4_2xxx.h local
  ARM: OMAP2+: Make l3_3xxx.h local
  ARM: OMAP2+: Make l3_2xxx.h local
  ARM: OMAP1: Move irda.h from plat to mach
  ARM: OMAP2+: Make hdq1w.h local
  ARM: OMAP2+: Make gpmc-smsc911x.h local
  ARM: OMAP2+: Make gpmc-smc91x.h local
  ARM: OMAP1: Move flash.h from plat to mach
  ARM: OMAP2+: Make debug-devices.h local
  ARM: OMAP1: Move board-voiceblue.h from plat to mach
  ARM: OMAP1: Move board-sx1.h from plat to mach
  ARM: OMAP2+: Make omap-wakeupgen.h local
  ARM: OMAP2+: Make omap-secure.h local
  ARM: OMAP2+: Make ctrl_module_wkup_44xx.h local
  ...
2012-10-01 18:19:05 -07:00
Linus Torvalds 47061eda25 ARM: soc: non-critical bug fixes
These were submitted as bug fixes before v3.6 but not considered important
 enough to be included in it. Some of them cross over to cleanup territory
 as well, and aren't strictly bugfixes.
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Merge tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull non-critical ARM soc bug fixes from Olof Johansson:
 "These were submitted as bug fixes before v3.6 but not considered
  important enough to be included in it.  Some of them cross over to
  cleanup territory as well, and aren't strictly bugfixes."

* tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits)
  ARM: nomadik: remove NAND_NO_READRDY use
  ARM: pxa: fix return value check in pxa2xx_drv_pcmcia_probe()
  ARM: SAMSUNG: Add missing variable declaration in s3c64xx_spi1_set_platdata()
  ARM: S3C24XX: removes unnecessary semicolon
  ARM: S3C24xx: delete double assignment
  ARM: EXYNOS: fix address for EXYNOS4 MDMA1
  ARM: EXYNOS: fixed SYSMMU setup definition to mate parameter name
  ARM: ep93xx: Move ts72xx.h out of include/mach
  ARM: ep93xx: use __iomem pointers for MMIO
  ARM: msm: Fix early debug uart mapping on some memory configs
  ARM: msm: io: Change the default static iomappings to be shared
  ARM: msm: io: Remove 7x30 iomap region from 7x00
  ARM: msm: Remove call to missing FPGA init on 8660
  ARM: OMAP4: wakeupgen: remove duplicate AUXCOREBOOT* read/write
  ARM: OMAP4: wakeupgen: Fix the typo in AUXCOREBOOT register save
  dma: tegra: make data used as *of_device_id.data const
  can: mpc5xxx_can: make data used as *of_device_id.data const
  macintosh/mediabay: make data used as *of_device_id.data const
  i2c/mpc: make data used as *of_device_id.data const
  mfd/da9052: make i2c_device_id array const
  ...
2012-10-01 18:02:07 -07:00
Linus Torvalds 99dbb1632f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull the trivial tree from Jiri Kosina:
 "Tiny usual fixes all over the place"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits)
  doc: fix old config name of kprobetrace
  fs/fs-writeback.c: cleanup riteback_sb_inodes kerneldoc
  btrfs: fix the commment for the action flags in delayed-ref.h
  btrfs: fix trivial typo for the comment of BTRFS_FREE_INO_OBJECTID
  vfs: fix kerneldoc for generic_fh_to_parent()
  treewide: fix comment/printk/variable typos
  ipr: fix small coding style issues
  doc: fix broken utf8 encoding
  nfs: comment fix
  platform/x86: fix asus_laptop.wled_type module parameter
  mfd: printk/comment fixes
  doc: getdelays.c: remember to close() socket on error in create_nl_socket()
  doc: aliasing-test: close fd on write error
  mmc: fix comment typos
  dma: fix comments
  spi: fix comment/printk typos in spi
  Coccinelle: fix typo in memdup_user.cocci
  tmiofb: missing NULL pointer checks
  tools: perf: Fix typo in tools/perf
  tools/testing: fix comment / output typos
  ...
2012-10-01 09:06:36 -07:00
Srinivas Kandagatla 06455bbcab dt/s3c64xx/spi: Use of_get_child_by_name to get a named child
As follow-up to "dt: introduce of_get_child_by_name to get child node by
name." patch, This patch removes some of the code duplication in the
driver by replacing it with of_get_child_by_name instead.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-10-01 10:50:26 -05:00
Stephen Warren 536a53a300 spi: remove completely broken Tegra driver
The current SPI driver has many issues. Examples are:

* Segfaulting on most transfers due to expecting all transfers to have
  both RX and TX buffers.
* Hanging on TX transfers since the whole driver flow is driven by RX
  DMA completion, but the HW is only told to enable RX for RX transfers.
* Use of clk_disable_unprepare() from atomic context.
* Once those and other minor issues are fixed, the driver still doesn't
  actually work.
* The driver also implements a deprecated API to the SPI core.

For this reason, simply remove the driver completely. This has two
advantages:

1) This will remove the last use of Tegra's <mach/dma.h>, which will
   allow that file to be removed, which is required for single zImage
   work.

2) The downstream driver is significaly different from the current
   code. I believe a patch to re-add the downstream driver (with
   appropriate cleanup) will be much simpler to review if it's a new
   file rather than randomly interspered with essentially unrelated
   existing code.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-01 13:29:49 +01:00
Mark Brown f4b81dd83e Merge branches 'spi-drivers' and 'spi-mxs' into spi-next 2012-09-28 14:05:29 +01:00
Knut Wohlrab c09b890b76 spi/imx: set the inactive state of the clock according to the clock polarity
There are SPI devices which need a SPI clock with active low polarity and
high inactive state.

Add the setting of the inactive state ECSPIx_CONFIGREG:SCLK CTL
according to the clock polarity ECSPIx_CONFIGREG:SCLK POL:

DT without "spi-cpol" = 0 = clock active high polarity = inactive state low
DT with    "spi-cpol" = 1 = clock active low  polarity = inactive state high

Signed-off-by: Knut Wohlrab <knut.wohlrab@de.bosch.com>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-28 14:05:08 +01:00
Linus Walleij ada7aec7ee spi/pl022: get/put resources on suspend/resume
This factors out the resource handling in runtime
suspend/resume and also calls it from the ordinary suspend
and resume hooks.

The semantics require that ordinary PM op suspend is called
with runtime PM in resumed mode, so that ordinary suspend
can assume that it will e.g. decrease the clock reference
counter to 0, runtime resume having previously increased it
to 1.

Cc: Vipul Kumar Samar <vipulkumar.samar@st.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-28 14:05:07 +01:00
Linus Walleij aeef9915b9 spi/pl022: use more managed resources
This switches the PL022 SPI driver to use devm_* managed resources
for IRQ, clocks, ioremap and GPIO. Prior to this, the GPIOs would
even leak.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-28 14:05:06 +01:00
Mark Brown ac48f6cb5f Linux 3.6-rc6
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Merge tag 'v3.6-rc6' into spi-mxs

Linux 3.6-rc6

Conflicts (overlap between moving code that accesses registers around
and factoring the register access out into a SSP layer):
	drivers/mmc/host/mxs-mmc.c
2012-09-25 13:41:02 +01:00
Mark Brown 8e5d0661b3 Linux 3.6-rc6
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Merge tag 'v3.6-rc6' into spi-drivers

Linux 3.6-rc6

Conflicts:
	drivers/spi/spi-omap2-mcspi.c
2012-09-25 13:37:05 +01:00
Roland Stigge 39a6ac11df spi/pl022: Devicetree support w/o platform data
Even with devicetree support, we needed platform data to provide some data,
leading to mixed device tree and platform data. This patch makes it possible to
provide all that information via device tree. Now, the data must be provided
via platform data _or_ device tree completely.

Only in case of DMA where a callback specification is necessary (dma_filter()),
platform data is the only option.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-25 07:06:16 -04:00
Sylwester Nawrocki 5bee3b94d9 spi/s3c64xx: Don't free controller_data on non-dt platforms
When s3c64xx-spi is instantiated from device tree an instance of
struct s3c64xx_spi_csinfo is dynamically allocated in the driver.
For non-dt platform it is passed from board code through
spi_register_board_info(). On error path in s3c64xx_spi_setup()
function there is an attempt to free this data struct
s3c64xx_spi_csinfo object as it would have been allocated in the
driver for both, dt and non-dt based platforms. This leads to
following bug when gpio request fails:

spi spi1.0: Failed to get /CS gpio [21]: -16
kernel BUG at mm/slub.c:3478!
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0    Not tainted  (3.6.0-rc5-00092-g9b0b493-dirty #6111)
PC is at kfree+0x148/0x158
LR is at s3c64xx_spi_setup+0xac/0x290
pc : [<c00a513c>]    lr : [<c0227014>]    psr: 40000013
sp : ee043e10  ip : c032883c  fp : c0481f7c
r10: ee0abd80  r9 : 00000063  r8 : 00000000
r7 : ee129e78  r6 : ee104a00  r5 : fffffff0  r4 : c047bc64
r3 : 40000400  r2 : c047bc64  r1 : c04def60  r0 : 0004047b
Flags: nZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 4000404a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xee0422f0)
Stack: (0xee043e10 to 0xee044000)
...
[<c00a513c>] (kfree+0x148/0x158) from [<c0227014>] (s3c64xx_spi_setup+0xac/0x290)
[<c0227014>] (s3c64xx_spi_setup+0xac/0x290) from [<c02251a4>] (spi_setup+0x34/0x4c)
[<c02251a4>] (spi_setup+0x34/0x4c) from [<c02258d0>] (spi_add_device+0x98/0x128)
[<c02258d0>] (spi_add_device+0x98/0x128) from [<c02259d4>] (spi_new_device+0x74/0xa8)
[<c02259d4>] (spi_new_device+0x74/0xa8) from [<c0225a2c>] (spi_match_master_to_boardinfo+0x24/0x44)
[<c0225a2c>] (spi_match_master_to_boardinfo+0x24/0x44) from [<c0225b40>] (spi_register_master+0xf4/0x2a8)
[<c0225b40>] (spi_register_master+0xf4/0x2a8) from [<c043fe0c>] (s3c64xx_spi_probe+0x34c/0x42c)
[<c043fe0c>] (s3c64xx_spi_probe+0x34c/0x42c) from [<c01fc198>] (platform_drv_probe+0x18/0x1c)

There should be no attempt to kfree controller_data when it was
externally provided through the board code. Fix this by freeing
controller_data only when dev->of_node is not null.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-25 07:06:16 -04:00
Paul Walmsley a04bcc231c SPI: OMAP: remove unnecessary includes of plat/clock.h
Remove unnecessary includes of plat/clock.h from the OMAP SPI
controller drivers.  These need to be removed to build multi-subarch
ARM kernels which include these drivers.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
2012-09-22 10:50:01 -06:00
Matt Porter ec155afa82 spi: omap2-mcspi: add pinctrl support
Adds pinctrl support to support OMAP platforms that boot from DT
and rely on pinctrl support to set pinmuxes.

Signed-off-by: Matt Porter <mporter@ti.com>
Acked-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-22 12:06:10 -04:00
Olof Johansson e3a66aa33a Merge branch 'multiplatform/platform-data' into next/multiplatform
* multiplatform/platform-data:
  ARM: spear: move platform_data definitions
  ARM: samsung: move platform_data definitions
  ARM: orion: move platform_data definitions
  ARM: nomadik: move platform_data definitions
  ARM: w90x900: move platform_data definitions
  ARM: vt8500: move platform_data definitions
  ARM: tegra: move sdhci platform_data definition
  ARM: sa1100: move platform_data definitions
  ARM: pxa: move platform_data definitions
  ARM: netx: move platform_data definitions
  ARM: msm: move platform_data definitions
  ARM: imx: move platform_data definitions
  ARM: ep93xx: move platform_data definitions
  ARM: davinci: move platform_data definitions
  ARM: at91: move platform_data definitions

Conflicts due to removed files:
	arch/arm/mach-tegra/board-harmony.c
	arch/arm/mach-tegra/board-trimslice.c

Conflicts due to code removal:
	arch/arm/mach-tegra/board-paz00.c

Context conflicts in:
	drivers/mmc/host/sdhci-tegra.c
	drivers/net/irda/pxaficp_ir.c

Signed-off-by: Olof Johansson <olof@lixom.net>
2012-09-22 01:07:21 -07:00
Olof Johansson b97ba3ab4e This branch contains mostly scripted changes to make omap
header files local where possible to get us closer to supporting
 the ARM single zImage. After these changes mach includes are
 pretty much out of the way for omap2+, but still lots of manual
 work remains to sort through the remaining plat includes.
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Merge tag 'omap-cleanup-local-headers-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup

From Tony Lindgren:
This branch contains mostly scripted changes to make omap
header files local where possible to get us closer to supporting
the ARM single zImage. After these changes mach includes are
pretty much out of the way for omap2+, but still lots of manual
work remains to sort through the remaining plat includes.

* tag 'omap-cleanup-local-headers-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (26 commits)
  ARM: OMAP2+: Make omap4-keypad.h local
  ARM: OMAP2+: Make l4_3xxx.h local
  ARM: OMAP2+: Make l4_2xxx.h local
  ARM: OMAP2+: Make l3_3xxx.h local
  ARM: OMAP2+: Make l3_2xxx.h local
  ARM: OMAP1: Move irda.h from plat to mach
  ARM: OMAP2+: Make hdq1w.h local
  ARM: OMAP2+: Make gpmc-smsc911x.h local
  ARM: OMAP2+: Make gpmc-smc91x.h local
  ARM: OMAP1: Move flash.h from plat to mach
  ARM: OMAP2+: Make debug-devices.h local
  ARM: OMAP1: Move board-voiceblue.h from plat to mach
  ARM: OMAP1: Move board-sx1.h from plat to mach
  ARM: OMAP2+: Make omap-wakeupgen.h local
  ARM: OMAP2+: Make omap-secure.h local
  ARM: OMAP2+: Make ctrl_module_wkup_44xx.h local
  ARM: OMAP2+: Make ctrl_module_pad_wkup_44xx.h local
  ARM: OMAP2+: Make ctrl_module_pad_core_44xx.h local
  ARM: OMAP2+: Make ctrl_module_core_44xx.h local
  ARM: OMAP2+: Make board-rx51.h local
  ...
2012-09-20 20:27:06 -07:00
Olof Johansson 32dec75349 ARM: tegra: switch to dmaengine
The Tegra code-base has contained both a legacy DMA and a dmaengine
 driver since v3.6-rcX. This series flips Tegra's defconfig to enable
 dmaengine rather than the legacy driver, and removes the legacy driver
 and all client code.
 
 The branch is based on v3.6-rc6 in order to pick up a bug-fix to the
 ASoC Tegra PCM driver that's required for audio to work correctly when
 using dmaengine.
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Merge tag 'tegra-for-3.7-dmaengine' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/cleanup

ARM: tegra: switch to dmaengine

The Tegra code-base has contained both a legacy DMA and a dmaengine
driver since v3.6-rcX. This series flips Tegra's defconfig to enable
dmaengine rather than the legacy driver, and removes the legacy driver
and all client code.

* tag 'tegra-for-3.7-dmaengine' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ASoC: tegra: remove support of legacy DMA driver based access
  spi: tegra: remove support of legacy DMA driver based access
  ARM: tegra: apbio: remove support of legacy DMA driver based access
  ARM: tegra: dma: remove legacy APB DMA driver
  ARM: tegra: config: enable dmaengine based APB DMA driver
  + sync to 3.6-rc6
2012-09-20 19:57:38 -07:00
Tony Lindgren 70c494c312 ARM: OMAP1: Make plat/mux.h omap1 only
We are moving omap2+ to use the device tree based pinctrl-single.c
and will be removing the old mux framework. This will remove the
omap1 specific parts from plat-omap.

Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: linux-usb@vger.kernel.org
Cc: linux-pcmcia@lists.infradead.org
Cc: spi-devel-general@lists.sourceforge.net
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-20 14:54:57 -07:00
Patrice Chotard 4f5e1b3708 spi/pl022: adopt pinctrl support
Amend the PL022 pin controller to optionally take a pin control
handle and set the state of the pins to "default" on boot and
runtime resume, and to "sleep" at runtime suspend. This way we
will dynamically save power on the SPI busses, for example some
electronic designs may be able to ground the pins when unused
instead of pull-up. Some pin controllers may want to set the
pins as wake-up sources when sleeping.

Effect on platforms using the PL022 driver:

- If the platform does not use pin control - no semantic effect,
  the pinctrl stubs will kick in and resolve the situation.

- Platforms using this driver and have pin control but no
  function defined for the PL022 need to either supply a
  "default" function in their map or enable pinctrl dummies
  so the driver is satisfied.

- Platforms using this driver with hogs for setting up the PL022
  pin control - stop using hogs to take the pl022 pin control
  handle, let the driver handle this.

I'be looked at some platforms that may be affected:

- SPEAr: appears to define the proper functions in their device
  trees and not hogging them, so things should be smooth, the
  driver will simply start to take its pins.

- Ux500: the proper function is defined and will be taken properly
  by the driver. New sleep states introduced by a separate patch to
  ux500 but no regression, since the default state is sufficient.

- U300: old hog deleted as part of this patch.

- LPC32xx: does not appear to be using pinctrl.

- ARM Integrator IMPD1, RealView & Versatile: does not use pinctrl.

Tested-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-20 09:02:53 -04:00
Arnd Bergmann 436d42c61c ARM: samsung: move platform_data definitions
Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the samsung include directories

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: "Wolfram Sang (embedded platforms)" <w.sang@pengutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: linux-samsung-soc@vger.kernel.org
2012-09-19 17:42:18 +02:00