The irq handler should return IRQ_NONE or IRQ_HANDLED to report
if we have handled the interrupt.
Signed-off-by: Toby Smith <toby@tismith.id.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
If no device tree node existed for a device when CONFIG_OF_GPIO was
defined, then gpio_base would not default to -1.
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add the NXP PCA9698 40-bit GPIO expander to the supported list.
Note: This only enables GPIO functionality.
Tested-by: Bob Schmitz <bschmitz@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Graeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pca953x driver supports tca6424 (24-bit) and pca9505 (40-bit)
devices. They were the only supported devices not mentioned in the
Kconfig help.
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Graeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This switches the two members of struct gpio_chip that were
defined as unsigned foo:1 to bool, because that is indeed what
they are. Switch all users in the gpio and pinctrl subsystems
to assign these values with true/false instead of 0/1. The
users outside these subsystems will survive since true/false
is 1/0, atleast we set some kind of more strict typing example.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pca957x driver supports a handful of I2C GPIO expanders from NXP, Maxim,
and TI. For the PCA9574 and PCA9575 devices only, the driver resets the GPIO
level and direction in the pca957x_probe function. This seems like the wrong
thing to do, since it can cause hardware bit twiddles during warm reboots when
the chip state and reset values don't match.
This kind of initialization is best left upstream (in a bootloader) or
downstream (in userspace). It's also an inconsistency across devices supported
by this driver.
This patch is NOT boot-tested: the SoC I'm using is stuck on 2.6.37, and the
patch doesn't apply trivially.
Signed-off-by: Graeme Smecher <gsmecher@threespeedlogic.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- A new driver for the TZ1090 PDC which is used on the metag
architecture.
- A new driver for the Kontron ETX or COMexpress GPIO block.
This is found on some ETX x86 devices.
- A new driver for the Fintek Super-I/O chips, used on
some x86 boards.
- Added device tree probing on a few select GPIO blocks.
- Drop the Exynos support from the Samsung GPIO driver.
The Samsung maintainers have moved over to use the
modernized pin control driver to provide GPIO for the
modern platforms instead.
- The usual bunch of non-critical fixes and cleanups.
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Merge tag 'gpio-v3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for the v3.12 series:
- A new driver for the TZ1090 PDC which is used on the metag
architecture.
- A new driver for the Kontron ETX or COMexpress GPIO block. This is
found on some ETX x86 devices.
- A new driver for the Fintek Super-I/O chips, used on some x86
boards.
- Added device tree probing on a few select GPIO blocks.
- Drop the Exynos support from the Samsung GPIO driver.
The Samsung maintainers have moved over to use the modernized pin
control driver to provide GPIO for the modern platforms instead.
- The usual bunch of non-critical fixes and cleanups"
* tag 'gpio-v3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (36 commits)
gpio: return -ENOTSUPP if debounce cannot be set
gpio: improve error path in gpiolib
gpio: add GPIO support for F71882FG and F71889F
of: add vendor prefix for Microchip Technology Inc
gpio: mcp23s08: rename the device tree property
gpio: samsung: Drop support for Exynos SoCs
gpio: pcf857x: Remove pdata argument to pcf857x_irq_domain_init()
gpio: pcf857x: Sort headers alphabetically
gpio: max7301: Reverting "Do not force SPI speed when using OF Platform"
gpio: Fix bit masking in Kontron PLD GPIO driver
gpio: pca953x: fix gpio input on gpio offsets >= 8
drivers/gpio: simplify use of devm_ioremap_resource
drivers/gpio/gpio-omap.c: convert comma to semicolon
gpio-lynxpoint: Fix warning about unbalanced pm_runtime_enable
gpio: Fix platform driver name in Kontron PLD GPIO driver
gpio: adnp: Fix segfault if request_threaded_irq fails
gpio: msm: Staticize local variable 'msm_gpio'
gpio: gpiolib-of.c: make error message more meaningful by adding the node name and index
gpio: use dev_get_platdata()
gpio/mxc: add chained_irq_enter/exit() to mx2_gpio_irq_handler
...
This patch moves the pca953x.h header from include/linux/i2c to
include/linux/platform_data and updates existing support accordingly.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This change fixes a regression introduced by commit
f5f0b7aa8 (gpio: pca953x: make the register access by GPIO bank)
When the pca953x driver was converted to using 8-bit reads/writes
the bitmask in pca953x_gpio_get_value wasn't adjusted with a
modulus BANK_SZ and consequently looks at the wrong bits in the
input register.
Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The usual selection of bug fixes and driver updates for GPIO. Nothing
really stands out except the addition of the GRGPIO driver and some
enhacements to ACPI support
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux
Pull GPIO changes from Grant Likely:
"The usual selection of bug fixes and driver updates for GPIO. Nothing
really stands out except the addition of the GRGPIO driver and some
enhacements to ACPI support"
I'm pulling this despite the earlier mess. Let's hope it compiles these
days.
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (46 commits)
gpio: grgpio: Add irq support
gpio: grgpio: Add device driver for GRGPIO cores
gpiolib-acpi: introduce acpi_get_gpio_by_index() helper
GPIO: gpio-generic: remove kfree() from bgpio_remove call
gpio / ACPI: Handle ACPI events in accordance with the spec
gpio: lpc32xx: Fix off-by-one valid range checking for bank
gpio: mcp23s08: convert driver to DT
gpio/omap: force restore if context loss is not detectable
gpio/omap: optimise interrupt service routine
gpio/omap: remove extra context restores in *_runtime_resume()
gpio/omap: free irq domain in probe() failure paths
gpio: gpio-generic: Add 16 and 32 bit big endian byte order support
gpio: samsung: Add terminating entry for exynos_pinctrl_ids
gpio: mvebu: add dbg_show function
MAX7301 GPIO: Do not force SPI speed when using OF Platform
gpio: gpio-tps65910.c: fix checkpatch error
gpio: gpio-timberdale.c: fix checkpatch error
gpio: gpio-tc3589x.c: fix checkpatch errors
gpio: gpio-stp-xway.c: fix checkpatch error
gpio: gpio-sch.c: fix checkpatch error
...
We actually have to pass chip as the host_data parameter of
irq_domain_add_simple() as later on, it is used to initialize chip_data
in pca953x_gpio_irq_map(). Failing to do so is leading to a NULL pointer
dereference after calling irq_data_get_irq_chip_data() in
pca953x_irq_mask(), pca953x_irq_unmask(), pca953x_irq_bus_lock(),
pca953x_irq_bus_sync_unlock() and pca953x_irq_set_type().
Fixes regression introduced by commit
0e8f2fdacf (gpio: pca953x: use simple
irqdomain)
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using the devm_* managed resources the pca driver can be simplified
and cut down on boilerplate code.
[gcl: fixed a inccorect reference to a removed label, "goto fail_out"
became "return ret"]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This switches the legacy irqdomain to the simple one, which will
auto-allocate descriptors, and also make sure that we use
irq_create_mapping() in the to_irq function. Also use the map function
of irq_domain_ops to setup the irq configuration on demand and no more
statically during the initialization of the driver.
Based on a initial patch from Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Now that pca953x driver can handle GPIO expanders with more than 32
bits this patch adds the support for the pca9505 which cam with 40
GPIOs.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Until now the pca953x driver accessed all the bank of a given register
in a single command using only a 32 bits variable. New expanders from
the pca53x family come with 40 GPIOs which no more fit in a 32
variable. This patch make access to the registers more generic by
relying on an array of u8 variables. This fits exactly the way the
registers are represented in the hardware.
It also adds helpers to access to a single register of a bank instead
of reading or writing all the banks for a given register.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Here's the large driver core updates for 3.8-rc1.
The biggest thing here is the various __dev* marking removals. This is
going to be a pain for the merge with different subsystem trees, I know,
but all of the patches included here have been ACKed by their various
subsystem maintainers, as they wanted them to go through here.
If this is too much of a pain, I can pull all of them out of this tree
and just send you one with the other fixes/updates and then, after
3.8-rc1 is out, do the rest of the removals to ensure we catch them all,
it's up to you. The merges should all be trivial, and Stephen has been
doing them all in linux-next for a few weeks now quite easily.
Other than the __dev* marking removals, there's nothing major here, some
firmware loading updates and other minor things in the driver core.
All of these have (much to Stephen's annoyance), been in linux-next for
a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg Kroah-Hartman:
"Here's the large driver core updates for 3.8-rc1.
The biggest thing here is the various __dev* marking removals. This
is going to be a pain for the merge with different subsystem trees, I
know, but all of the patches included here have been ACKed by their
various subsystem maintainers, as they wanted them to go through here.
If this is too much of a pain, I can pull all of them out of this tree
and just send you one with the other fixes/updates and then, after
3.8-rc1 is out, do the rest of the removals to ensure we catch them
all, it's up to you. The merges should all be trivial, and Stephen
has been doing them all in linux-next for a few weeks now quite
easily.
Other than the __dev* marking removals, there's nothing major here,
some firmware loading updates and other minor things in the driver
core.
All of these have (much to Stephen's annoyance), been in linux-next
for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
Fixed up trivial conflicts in drivers/gpio/gpio-{em,stmpe}.c due to gpio
update.
* tag 'driver-core-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (93 commits)
modpost.c: Stop checking __dev* section mismatches
init.h: Remove __dev* sections from the kernel
acpi: remove use of __devinit
PCI: Remove __dev* markings
PCI: Always build setup-bus when PCI is enabled
PCI: Move pci_uevent into pci-driver.c
PCI: Remove CONFIG_HOTPLUG ifdefs
unicore32/PCI: Remove CONFIG_HOTPLUG ifdefs
sh/PCI: Remove CONFIG_HOTPLUG ifdefs
powerpc/PCI: Remove CONFIG_HOTPLUG ifdefs
mips/PCI: Remove CONFIG_HOTPLUG ifdefs
microblaze/PCI: Remove CONFIG_HOTPLUG ifdefs
dma: remove use of __devinit
dma: remove use of __devexit_p
firewire: remove use of __devinitdata
firewire: remove use of __devinit
leds: remove use of __devexit
leds: remove use of __devinit
leds: remove use of __devexit_p
mmc: remove use of __devexit
...
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Even though the device tree binding code was already written, the
compatible strings were not yet in the driver.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The PCA953x used to register no IRQ domain, which made it impossible to
use it as an interrupt-parent from the device tree.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Increase variable size from u16 to u32 to allocate 24 bit of data required for
the TCA6424 I/O expander device type.
Signed-off-by: Leed Aguilar <leed.aguilar@ti.com>
Signed-off-by: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
TCA6424 is a low voltage 24 bit I2C and SMBus I/O expander of pca953x family
similar to its 16 bit predecessor TCA6416. It comes with three 8-bit active
Input, Output, Polarity Inversion and Configuration registers each. The polarity
of Input ports can be reversed by setting the appropiate bit in Polarity
Inversion registers.
The variables corresponding to Input, Output and Configuration registers have
already been updated to support 24 bit values. This patch thus updates the
invert variable of PCA953X platform data to support 24 bit.
Signed-off-by: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a follow-up to ae79c1904 "[PATCH v2] Add support for TCA6424"
merged in the v3.5 merge window. It fixes comments made when the
patch was merged.
- Use 3 byte transfers instead of two separate transfers (2+1 byte)
- An unnecessary cast removed
Signed-off-by: Andreas Schallenberg <Andreas.Schallenberg@3alitytechnica.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch extends the PCA953x driver to support TI's TCA6424A 24 bit I2C I/O expander. The patch is based on code by Michele
Bevilacqua.
Changes in v2:
- Compare ngpio against 24 in both places, not >16
- Larger datatype now u32 instead of uint.
Bit fields not used for struct members since their address is taken.
- Be precise: TCA6424A (untested for older TCA6424)
Signed-off-by: Andreas Schallenberg<Andreas.Schallenberg@3alitytechnica.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
It's not used outside of the driver so doesn't need to be exported, and
sparse notices this and complains about it.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6:
gpio: pca953x: propagate the errno from the chip_init functions
gpio: pca953x: remove unneeded check for chip type
gpio/omap: check return value from irq_alloc_generic_chip
gpio/omap: replace MOD_REG_BIT macro with static inline
Initializing the chips may return with an error, but this error gets
dropped in probe(). Propagate this further to the driver core. Also,
simplify returning the error in one of the init functions.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
We can assume our own device_id table is correct, so remove checking if
the chip type is valid. (The check was bogus anyway: If it found an
invalid entry, it returned with 0!) This is in preparation for further
cleanups.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
gpio_base was set to 0 if no system platform data or open firmware
platform data was provided. This led to conflicts, if any other gpiochip
with a gpiobase of 0 was instantiated already. Setting it to -1 will
automatically use the first one available.
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The property 'polarity' is handled by the GPIO core, and the 'gpio-base'
should be assigned automatically. It is meaningless in the device-tree,
since GPIO's are identified by the "chip-name"/offset pair.
This way, the whole pca953x_get_alt_pdata() can hopefully soon go away.
We still need to check whether we really want GPIO-interrupt functionality
by simply looking if the I2C node has an interrupts property defined, since
this property is not used for anything else.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
In the case that we obtain device-tree data to fill in platform_data, the new
platform data struct was dynamically allocated, but the pointer to it was not
used everywhere it should. It seems easier to fix this issue by removing the
dynamic allocation altogether since its data is only used during driver
probing.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
When using nested threaded irqs, use handle_nested_irq(). This function
does not call the chip handler, so no handler is set.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The interrupt pin of the PCA953x is active low, and on the rising edge
no interrupt should be produced.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
It seems that in the normal case, IRQ_NOREQUEST needs to be explicitly
cleared, otherwise claiming the interrupt fails.
In the case of sparse interrupts, the descriptor needs to be allocated
first.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Sort the gpio makefile and enforce the naming convention gpio-*.c for
gpio drivers.
v2: cleaned up filenames in Kconfig and comment blocks
v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Toby Smith
Aaron Sierra
Linus Walleij
Graeme Smecher
Linus Torvalds
Vivien Didelot
Andrew Ruder
Jingoo Han
Alexandre Belloni
Laurent Navet
Gregory CLEMENT
Bill Pemberton
Maxime Ripard
Leed Aguilar
Chandrabhanu Mahapatra
Andreas Schallenberg
Mark Brown
Wolfram Sang
Hartmut Knaack
David Jander
Grant Likely