Add support for translating ACPI GPIO pin numbers to Linux GPIO API pins.
Needs a gpio controller driver with the acpi handler hook set.
Drivers can use acpi_get_gpio() to translate ACPI5 GpioIO and GpioInt
resources to Linux GPIO's.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
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>
This adds the mfd cell to use the gpio a and gpio b part
of the Nano River Technologies viperboard.
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
SPEAr platform provides a provision to control chipselects of ARM PL022
Prime Cell spi controller through its system registers, which otherwise
remains under PL022 control which some protocols do not want.
This commit intends to provide the spi chipselect control in software over
gpiolib interface. spi chip drivers can use the exported gpiolib interface to
define their chipselect through DT or platform data.
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Reviewed-by: Vipin Kumar <vipin.kumar@st.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The CLPS711X CPUs provide some GPIOs for use in the system. This
driver provides support for these via gpiolib. Due to platform
limitations, driver does not support interrupts, only inputs and
outputs.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is the GPIO patch for the DA9055 PMIC. This patch has got
dependency on the DA9055 MFD core.
This patch is functionally tested on SMDK6410 board.
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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
...
As usual we have a few new drivers:
- TI LP8788
- TI OMAP USB TLL
- Maxim MAX8907
- SMSC ECE1099
- Dialog Semiconductor DA9055
- A simpler syscon driver that allow us to get rid of the anatop one.
Drivers are also gradually getting Device Tree and IRQ domain support.
The following drivers got DT support:
- palmas, 88pm860x, tc3589x and twl4030-audio
And those ones now use the IRQ domain APIs:
- 88pm860x, tc3589x, db8500_prcmu
Also some other interesting changes:
- Intel's ICH LPC now supports Lynx Point
- TI's twl4030-audio added a GPO child
- tps6527 enabled its backlight subdevice
- The twl6030 pwm driver moved to the new PWM subsystem
And finally a bunch of cleanup and casual fixes for mc13xxx, 88pm860x, palmas,
ab8500, wm8994, wm5110, max8907 and the tps65xxx family.
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Merge tag 'mfd-3.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD changes from Samuel Ortiz:
"MFD bits for the 3.7 merge window.
As usual we have a few new drivers:
- TI LP8788
- TI OMAP USB TLL
- Maxim MAX8907
- SMSC ECE1099
- Dialog Semiconductor DA9055
- A simpler syscon driver that allow us to get rid of the anatop one.
Drivers are also gradually getting Device Tree and IRQ domain support.
The following drivers got DT support:
- palmas, 88pm860x, tc3589x and twl4030-audio
And those ones now use the IRQ domain APIs:
- 88pm860x, tc3589x, db8500_prcmu
Also some other interesting changes:
- Intel's ICH LPC now supports Lynx Point
- TI's twl4030-audio added a GPO child
- tps6527 enabled its backlight subdevice
- The twl6030 pwm driver moved to the new PWM subsystem
And finally a bunch of cleanup and casual fixes for mc13xxx, 88pm860x,
palmas, ab8500, wm8994, wm5110, max8907 and the tps65xxx family."
Fix up various annoying conflicts: the DT and IRQ domain support came in
twice and was already in 3.6. And then it was apparently rebased.
Guys, DON'T REBASE!
* tag 'mfd-3.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (89 commits)
ARM: dts: Enable 88pm860x pmic
mfd: 88pm860x: Move gpadc init into touch
mfd: 88pm860x: Device tree support
mfd: 88pm860x: Use irqdomain
mfd: smsc: Add support for smsc gpio io/keypad driver
backlight: tps65217_bl: Add missing platform_set_drvdata in tps65217_bl_probe
mfd: DA9055 core driver
mfd: tps65910: Add alarm interrupt of TPS65910 RTC to mfd device list
mfd: wm5110: Add register patches for revision B
mfd: wm5110: Disable control interface error report for WM5110 rev B
mfd: max8907: Remove regulator-compatible from DT docs
backlight: Add TPS65217 WLED driver
mfd: Add backlight as subdevice to the tps65217
mfd: Provide the PRCMU with its own IRQ domain
mfd: Fix max8907 sparse warning
mfd: Add lp8788 mfd driver
mfd: dbx500: Provide a more accurate smp_twd clock
mfd: rc5t583: Fix warning messages
regulator: palmas: Add DT support
mfd: palmas: Change regulator defns to better suite DT
...
- refactoring from Thierry Redding at Arnd Bergmann's request to use
the seq_file iterator interface in gpiolib.
- A new driver for Avionic Design's N-bit GPIO expander.
- Two instances of mutexes replaced by spinlocks from Axel Lin to
code that is supposed to be fastpath compliant.
- IRQ demuxer and gpio_to_irq() support for pcf857x by Kuninori
Morimoto.
- Dynamic GPIO numbers, device tree support, daisy chaining and some
other fixes for the 74x164 driver by Maxime Ripard.
- IRQ domain and device tree support for the tc3589x driver by
Lee Jones.
- Some conversion to use managed resources devm_* code.
- Some instances of clk_prepare() or clk_prepare_enable() added to
support the new, stricter common clock framework.
- Some for_each_set_bit() simplifications.
- Then a lot of fixes as we fixed up all of the above tripping over
our own shoelaces and that kind of thing.
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Merge tag 'gpio-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
"So this is the LW GPIO patch stack for v3.7:
- refactoring from Thierry Redding at Arnd Bergmann's request to use
the seq_file iterator interface in gpiolib.
- A new driver for Avionic Design's N-bit GPIO expander.
- Two instances of mutexes replaced by spinlocks from Axel Lin to
code that is supposed to be fastpath compliant.
- IRQ demuxer and gpio_to_irq() support for pcf857x by Kuninori
Morimoto.
- Dynamic GPIO numbers, device tree support, daisy chaining and some
other fixes for the 74x164 driver by Maxime Ripard.
- IRQ domain and device tree support for the tc3589x driver by Lee
Jones.
- Some conversion to use managed resources devm_* code.
- Some instances of clk_prepare() or clk_prepare_enable() added to
support the new, stricter common clock framework.
- Some for_each_set_bit() simplifications.
- Then a lot of fixes as we fixed up all of the above tripping over
our own shoelaces and that kind of thing."
* tag 'gpio-for-v3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (34 commits)
gpio: pcf857x: select IRQ_DOMAIN
gpio: Document device_node's det_debounce
gpio-lpc32xx: Add GPI_28
gpio: adnp: dt: Reference generic interrupt binding
gpio: Add Avionic Design N-bit GPIO expander support
gpio: pxa: using for_each_set_bit to simplify the code
gpio_msm: using for_each_set_bit to simplify the code
gpio: Enable the tc3298x GPIO expander driver for Device Tree
gpio: Provide the tc3589x GPIO expander driver with an IRQ domain
ARM: shmobile: kzm9g: use gpio-keys instead of gpio-keys-polled
gpio: pcf857x: fixup smatch WARNING
gpio: 74x164: Add support for the daisy-chaining
gpio: 74x164: dts: Add documentation for the dt binding
dt: Fix incorrect reference in gpio-led documentation
gpio: 74x164: Add device tree support
gpio: 74x164: Use dynamic gpio number assignment if no pdata is present
gpio: 74x164: Use devm_kzalloc
gpio: 74x164: Use module_spi_driver boiler plate function
gpio: sx150x: Use irq_data_get_irq_chip_data() at appropriate places
gpio: em: Use irq_data_get_irq_chip_data() at appropriate places
...
This driver aims at replacing the arch/arm/plat-orion/gpio.c driver,
and is designed to be compatible with all Marvell EBU SoCs: Orion,
Kirkwood, Dove, Armada 370/XP and Discovery.
It has been successfully tested on Dove and Armada XP at the moment.
Compared to the plat-orion driver, this new driver has the following
added benefits:
*) Support for Armada 370 and Armada XP
*) It is integrated with the mvebu pinctrl driver so that GPIO pins
are properly muxed, and the GPIO driver knows which GPIO pins are
output-only or input-only.
*) Properly placed in drivers/gpio
*) More extensible mechanism to support platform differences. The
plat-orion driver uses a simple mask-offset DT property, which
works fine for Discovery MV78200 but not for Armada XP. The new
driver uses different compatible strings to identify the different
variants of the GPIO controllers.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Converted the existing arch-vt8500 gpio to a platform_device.
Added support for WM8505 and WM8650 GPIO controllers.
Replaced existing readl/writel calls with _relaxed variants.
Replaced existing unsigned variables with u32 to match register size.
Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
TWL6040 provides GPO lines to be used for controlling external devices.The number
of lines different between versions: twl6040 have 3 GPO while TWL6041 have 1.
Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit adds a driver for the Avionic Design N-bit GPIO expander.
The expander provides a variable number of GPIO pins with interrupt
support.
Changes in v2:
- allow building the driver as a module
- assign of_node unconditionally
- use linear mapping IRQ domain
- properly cleanup IRQ domain
- add OF device table and annotate device tables
- emulate rising and falling edge triggers
- increase #gpio-cells to 2
- drop support for !OF
- use IS_ENABLED to conditionalize DEBUG_FS code
Changes in v3:
- make IRQ support runtime configurable (interrupt-controller property)
- drop interrupt-controller and #interrupt-cells from DT binding
- add inline to_adnp() function to wrap container_of() macro
- consistently use adnp as name for struct adnp variables
- remove irq_mask_cur and rename irq_mask to irq_enable
- fix a subtle deadlock in adnp_gpio_direction_output()
- remove dynamic allocations from debugfs code
- rename regs to num_regs to avoid confusion
- annotate non-trivial code with comments
- don't acquire mutex in adnp_gpio_get()
- assume NO_IRQ == 0
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: linux-kernel@vger.kernel.org
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We have support for a few new drivers:
- Samsung s2mps11
- Wolfson Microelectronics wm5102 and wm5110
- Marvell 88PM800 and 88PM805
- TI twl6041
We also have our regular driver improvements:
- Device tree and IRQ domain support for STE AB8500
- Regmap and devm_* API conversion for TI tps6586x
- Device tree support for Samsung max77686
- devm_* API conversion for STE AB3100
Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910,
tps65090, da9052 and twl-core.
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Merge tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD bits from Samuel Ortiz:
"We have support for a few new drivers:
- Samsung s2mps11
- Wolfson Microelectronics wm5102 and wm5110
- Marvell 88PM800 and 88PM805
- TI twl6041
We also have our regular driver improvements:
- Device tree and IRQ domain support for STE AB8500
- Regmap and devm_* API conversion for TI tps6586x
- Device tree support for Samsung max77686
- devm_* API conversion for STE AB3100
Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910,
tps65090, da9052 and twl-core."
Fix up mostly trivial conflicts, with the exception of
drivers/usb/host/ehci-omap.c in particular, which had some
re-organization of the reset sequence (commit 1a49e2ac9651: "EHCI:
centralize controller initialization") that clashed with commit
2761a63945 ("mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix
issues").
In particular, commit 2761a63945 moved the usb_add_hcd() to the
*middle* of the reset sequence, which clashes fairly badly with the
reset sequence re-organization (although it could have been done inside
the new omap_ehci_init() function).
I left that part of commit 2761a63945 just undone.
* tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (110 commits)
mfd: Ensure AB8500 platform data is passed through db8500-prcmu to MFD Core
mfd: Arizone core should select MFD_CORE
mfd: Fix arizona-irq.c build by selecting REGMAP_IRQ
mfd: Add debug trace on entering and leaving arizone runtime suspend
mfd: Correct tps65090 cell names
mfd: Remove gpio support from tps6586x core driver
ARM: tegra: defconfig: Enable tps6586x gpio
gpio: tps6586x: Add gpio support through platform driver
mfd: Cache tps6586x register through regmap
mfd: Use regmap for tps6586x register access.
mfd: Use devm managed resources for tps6586x
input: Add onkey support for 88PM80X PMIC
mfd: Add support for twl6041
mfd: Fix twl6040 revision information
mfd: Matches should be NULL when populate anatop child devices
input: ab8500-ponkey: Create AB8500 domain IRQ mapping
mfd: Add missing out of memory check for pcf50633
Documentation: Describe the AB8500 Device Tree bindings
mfd: Add tps65910 32-kHz-crystal-input init
mfd: Drop modifying mc13xxx driver's id_table in probe
...
Converting the gpio driver of tps6586x to a platform
driver in place of registering the gpio through core
driver.
The motivation of the change is:
- This is inline with the mfd drivers implementation.
- This will move the related gpio support to gpio driver
folder where all gpio related drivers are available.
This will be easy the maintenance and enhancement is
anything done for gpio.
- The gpio functionality can be selected through config
variable.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The Arizona class devices provide some GPIOs for use in the system. This
driver provides support for these via gpiolib. Currently interrupts are
not supported, normally the GPIOs are outputs only.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
[Fold in WM5110 support patch]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add a driver to use GPIO pins available on several AMD south bridges
(currently only AMD 8111 is supported).
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Pull MIPS updates from Ralf Baechle:
"The whole series has been sitting in -next for quite a while with no
complaints. The last change to the series was before the weekend the
removal of an SPI patch which Grant - even though previously acked by
himself - appeared to raise objections. So I removed it until the
situation is clarified. Other than that all the patches have the acks
from their respective maintainers, all MIPS and x86 defconfigs are
building fine and I'm not aware of any problems introduced by this
series.
Among the key features for this patch series is a sizable patchset for
Lantiq which among other things introduces support for Lantiq's
flagship product, the FALCON SOC. It also means that the opensource
developers behind this patchset have overtaken Lantiq's competing
inhouse development team that was working behind closed doors.
Less noteworthy the ath79 patchset which adds support for a few more
chip variants, cleanups and fixes. Finally the usual dose of tweaking
of generic code."
Fix up trivial conflicts in arch/mips/lantiq/xway/gpio_{ebu,stp}.c where
printk spelling fixes clashed with file move and eventual removal of the
printk.
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (81 commits)
MIPS: lantiq: remove orphaned code
MIPS: Remove all -Wall and almost all -Werror usage from arch/mips.
MIPS: lantiq: implement support for FALCON soc
MTD: MIPS: lantiq: verify that the NOR interface is available on falcon soc
MTD: MIPS: lantiq: implement OF support
watchdog: MIPS: lantiq: implement OF support and minor fixes
SERIAL: MIPS: lantiq: implement OF support
GPIO: MIPS: lantiq: convert gpio-stp-xway to OF
GPIO: MIPS: lantiq: convert gpio-mm-lantiq to OF and of_mm_gpio
GPIO: MIPS: lantiq: move gpio-stp and gpio-ebu to the subsystem folder
MIPS: pci: convert lantiq driver to OF
MIPS: lantiq: convert dma to platform driver
MIPS: lantiq: implement support for clkdev api
MIPS: lantiq: drop ltq_gpio_request() and gpio_to_irq()
OF: MIPS: lantiq: implement irq_domain support
OF: MIPS: lantiq: implement OF support
MIPS: lantiq: drop mips_machine support
OF: PCI: const usage needed by MIPS
MIPS: Cavium: Remove smp_reserve_lock.
MIPS: Move cache setup to setup_arch().
...
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Merge tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD changes from Samuel Ortiz:
"Besides the usual cleanups, this one brings:
* Support for 5 new chipsets: Intel's ICH LPC and SCH Centerton,
ST-E's STAX211, Samsung's MAX77693 and TI's LM3533.
* Device tree support for the twl6040, tps65910, da9502 and ab8500
drivers.
* Fairly big tps56910, ab8500 and db8500 updates.
* i2c support for mc13xxx.
* Our regular update for the wm8xxx driver from Mark."
Fix up various conflicts with other trees, largely due to ab5500 removal
etc.
* tag 'mfd-3.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (106 commits)
mfd: Fix build break of max77693 by adding REGMAP_I2C option
mfd: Fix twl6040 build failure
mfd: Fix max77693 build failure
mfd: ab8500-core should depend on MFD_DB8500_PRCMU
gpio: tps65910: dt: process gpio specific device node info
mfd: Remove the parsing of dt info for tps65910 gpio
mfd: Save device node parsed platform data for tps65910 sub devices
mfd: Add r_select to lm3533 platform data
gpio: Add Intel Centerton support to gpio-sch
mfd: Emulate active low IRQs as well as active high IRQs for wm831x
mfd: Mark two lm3533 zone registers as volatile
mfd: Fix return type of lm533 attribute is_visible
mfd: Enable Device Tree support in the ab8500-pwm driver
mfd: Enable Device Tree support in the ab8500-sysctrl driver
mfd: Add support for Device Tree to twl6040
mfd: Register the twl6040 child for the ASoC codec unconditionally
mfd: Allocate twl6040 IRQ numbers dynamically
mfd: twl6040 code cleanup in interrupt initialization part
mfd: Enable ab8500-gpadc driver for Device Tree
mfd: Prevent unassigned pointer from being used in ab8500-gpadc driver
...
Lots of gpio changes, both to core code and drivers. Changes do touch
architecture code to remove the need for separate arm/gpio.h includes
in most architectures. Some new drivers are added, and a number of
gpio drivers are converted to use irq_domains for gpio inputs used as
interrupts. Device tree support has been amended to allow multiple
gpio_chips to use the same device tree node. Remaining changes are
primarily bug fixes.
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull GPIO driver changes from Grant Likely:
"Lots of gpio changes, both to core code and drivers.
Changes do touch architecture code to remove the need for separate
arm/gpio.h includes in most architectures.
Some new drivers are added, and a number of gpio drivers are converted
to use irq_domains for gpio inputs used as interrupts. Device tree
support has been amended to allow multiple gpio_chips to use the same
device tree node.
Remaining changes are primarily bug fixes."
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6: (33 commits)
gpio/generic: initialize basic_mmio_gpio shadow variables properly
gpiolib: Remove 'const' from data argument of gpiochip_find()
gpio/rc5t583: add gpio driver for RICOH PMIC RC5T583
gpiolib: quiet gpiochip_add boot message noise
gpio: mpc8xxx: Prevent NULL pointer deref in demux handler
gpio/lpc32xx: Add device tree support
gpio: Adjust of_xlate API to support multiple GPIO chips
gpiolib: Implement devm_gpio_request_one()
gpio-mcp23s08: dbg_show: fix pullup configuration display
Add support for TCA6424A
gpio/omap: (re)fix wakeups on level-triggered GPIOs
gpio/omap: fix broken context restore for non-OFF mode transitions
gpio/omap: fix missing check in *_runtime_suspend()
gpio/omap: remove cpu_is_omapxxxx() checks from *_runtime_resume()
gpio/omap: remove suspend/resume callbacks
gpio/omap: remove retrigger variable in gpio_irq_handler
gpio/omap: remove saved_wakeup field from struct gpio_bank
gpio/omap: remove suspend_wakeup field from struct gpio_bank
gpio/omap: remove saved_fallingdetect, saved_risingdetect
gpio/omap: remove virtual_irq_start variable
...
Conflicts:
drivers/gpio/gpio-samsung.c
With this, five platforms are moving to the relatively new pinctrl
subsystem for their pin management, replacing the older soc specific
in-kernel interfaces with common code.
There is quite a bit of net addition of code for each platform being
added to the pinctrl subsystem. but the payback comes later when adding
new boards can be done by only providing new device trees instead.
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Merge tag 'pinctrl' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull arm soc-specific pinctrl changes from Olof Johansson:
"With this, five platforms are moving to the relatively new pinctrl
subsystem for their pin management, replacing the older soc specific
in-kernel interfaces with common code.
There is quite a bit of net addition of code for each platform being
added to the pinctrl subsystem. But the payback comes later when
adding new boards can be done by only providing new device trees
instead."
Fix up trivial conflicts in arch/arm/mach-ux500/{Makefile,board-mop500.c}
* tag 'pinctrl' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (61 commits)
mtd: nand: gpmi: fix compile error caused by pinctrl call
ARM: PRIMA2: select PINCTRL and PINCTRL_SIRF in Kconfig
ARM: nomadik: enable PINCTRL_NOMADIK where needed
ARM: mxs: enable pinctrl support
video: mxsfb: adopt pinctrl support
ASoC: mxs-saif: adopt pinctrl support
i2c: mxs: adopt pinctrl support
mtd: nand: gpmi: adopt pinctrl support
mmc: mxs-mmc: adopt pinctrl support
serial: mxs-auart: adopt pinctrl support
serial: amba-pl011: adopt pinctrl support
spi/imx: adopt pinctrl support
i2c: imx: adopt pinctrl support
can: flexcan: adopt pinctrl support
net: fec: adopt pinctrl support
ARM: ux500: switch MSP to using pinctrl for pins
ARM: ux500: alter MSP registration to return a device pointer
ARM: ux500: switch to using pinctrl for uart0
ARM: ux500: delete custom pin control system
ARM: ux500: switch over to Nomadik pinctrl driver
...
Move the 2 drivers from arch/mips/lantiq/xway/ to the subsystem and make them
buildable.
The following 2 patches will convert the drivers to OF.
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Patchwork: https://patchwork.linux-mips.org/patch/3838/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The PMIC device RC5T583 from RICOH supports 8 gpios.
Adding gpio driver for this device to access the pins
control through gpio library.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
[grant.likely: slight cosmetic changes]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This patch is V2 of the Emma Mobile GPIO driver. This
driver is designed to be reusable between multiple SoCs
that share the same basic building block, but so far it
has only been used on Emma Mobile EV2.
Each driver instance handles 32 GPIOs with individually
maskable IRQs. The driver operates on two I/O memory
ranges and the 32 GPIOs are hooked up to two interrupts.
In the case of Emma Mobile EV2 this GPIO building block
is used as main external interrupt controller hooking up
159 GPIOS as 159 interrupts via 5 driver instances and
10 interrupts to the GIC and the Cortex-A9 Dual.
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Add gpio support for Intel MSIC chips found in Intel Medfield platforms.
MSIC supports totally 24 GPIOs with 16 low voltage and 8 high voltage pins.
Driver uses MSIC mfd interface for MSIC access.
(Updated comment to indicate why locking is actually safe)
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
I'm moving this driver over to the pinctrl subsystem to convert
the custom pin mux/config scheme over to use pinctrl.
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This introduces 128 gpio bits (for each PCI device installed) with
working interrupt support.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This driver works on many Intel chipsets, including the ICH6, ICH7,
ICH8, ICH9, ICH10, 3100, Series 5/3400 (Ibex Peak), Series 6/C200
(Cougar Point), and NM10 (Tiger Point).
Additional Intel chipsets should be easily supported if needed, eg the
ICH1-5, EP80579, etc.
Tested on QM67 (Cougar Point), QM57 (Ibex Peak), 3100 (Whitmore Lake),
and NM10 (Tiger Point).
Includes work from Jean Delvare:
- Resource leak removal during module load/unload
- GPIO API bit value enforcement
Also includes code cleanup from Guenter Roeck and Grant Likely.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The code in drivers/of/gpio.c isn't shared by any other subsystem since it
is all gpiolib specific. drivers/gpio is a better place to maintain these
functions.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Primarily gpio device driver changes with some minor side effects
under arch/arm and arch/x86. Also includes a few core changes such as
explicitly supporting (electrical) open source and open drain outputs
and some help for parsing gpio devicetree properties.
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Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull GPIO changes for v3.4 from Grant Likely:
"Primarily gpio device driver changes with some minor side effects
under arch/arm and arch/x86. Also includes a few core changes such as
explicitly supporting (electrical) open source and open drain outputs
and some help for parsing gpio devicetree properties."
Fix up context conflict due to Laxman Dewangan adding sleep control for
the tps65910 driver separately for gpio's and regulators.
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
gpio/ep93xx: Remove unused inline function and useless pr_err message
gpio/sodaville: Mark broken due to core irqdomain migration
gpio/omap: fix redundant decoding of gpio offset
gpio/omap: fix incorrect update to context.irqenable1
gpio/omap: fix incorrect context restore logic in omap_gpio_runtime_*
gpio/omap: fix missing dataout context save in _set_gpio_dataout_reg
gpio/omap: fix _set_gpio_irqenable implementation
gpio/omap: fix trigger type to unsigned
gpio/omap: fix wakeup_en register update in _set_gpio_wakeup()
gpio: tegra: tegra_gpio_config shouldn't be __init
gpio/davinci: fix enabling unbanked GPIO IRQs
gpio/davinci: fix oops on unbanked gpio irq request
gpio/omap: Fix section warning for omap_mpuio_alloc_gc()
ARM: tegra: export tegra_gpio_{en,dis}able
gpio/gpio-stmpe: Fix the value returned by _get_value routine
Documentation/gpio.txt: Explain expected pinctrl interaction
GPIO: LPC32xx: Add output reading to GPO P3
GPIO: LPC32xx: Fix missing bit selection mask
gpio/omap: fix wakeups on level-triggered GPIOs
gpio/omap: Fix IRQ handling for SPARSE_IRQ
...
The GE GPIO driver provides basic support (set direction, read/write state)
for the GPIO provided on some GE single board computers. This patch moves
the driver from the 86xx specific platform directrory to the GPIO subsystem
so that it can be used on non-86xx boards.
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Sodaville has GPIO controller behind the PCI bus. To my suprissed it is
not the same as on PXA.
The interrupt & gpio chip can be referenced from the device tree like
from any other driver. Unfortunately the driver which uses the gpio
interrupt has to use irq_of_parse_and_map() instead of
platform_get_irq(). The problem is that the platform device (which is
created from the device tree) is most likely created before the
interrupt chip is registered and therefore irq_of_parse_and_map() fails.
In theory the driver works as module. In reality most of the irq
functions are not exported to modules and it is possible that _this_
module is unloaded while the provided irqs are still in use.
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
[torbenh@linutronix.de: make it work after the irq namespace cleanup,
add some device tree entries.]
Signed-off-by: Torben Hohn <torbenh@linutronix.de>
[bigeasy@linutronix.de: convert to generic irq & gpio chip]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[grant.likely@secretlab.ca: depend on x86 to avoid irq_domain breakage]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
we only use the gpio function of mc9s08dz60 mcu chip, so just
add the gpio driver, as this mcu will never be used in other board.
Signed-off-by: Wu Guoxing <b39297@freescale.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (31 commits)
pinctrl: remove unnecessary max pin number
pinctrl: correct a offset while enumerating pins
pinctrl: some typo fixes
pinctrl: rename U300 and SIRF pin controllers
pinctrl: pass name instead of device to pin_config_*
pinctrl: add "struct seq_file;" to pinconf.h
pinctrl: conjure names for unnamed pins
pinctrl: add a group-specific hog macro
pinctrl: don't create a device for each pin controller
arm/u300: don't use PINMUX_MAP_PRIMARY*
pinctrl: implement PINMUX_MAP_SYS_HOG
pinctrl: add a pin config interface
pinctrl/coh901: driver to request its pins
pinctrl: u300-pinmux: register proper GPIO ranges
pinctrl: move the U300 GPIO driver to pinctrl
ARM: u300: localize GPIO assignments
pinctrl: make it possible to add multiple maps
pinctrl: make a copy of pinmux map
pinctrl: GPIO direction support for muxing
pinctrl: print pin range in GPIO range debugs
...
This patch adds 2 functions that allow managed devices to request GPIOs.
These GPIOs will then be managed by drivers/base/devres.c.
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This driver will be converted to a dual GPIO + pinctrl driver
since it supports biasing and driving control options. Hopefully
it can serve as an example.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
I screwed up by compiling that driver for the machine rather
than the arch. Correcting this fixes the build error.
Cc: Grant Likely <grant.likely@secretlab.ca>
Reported-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (106 commits)
powerpc/p3060qds: Add support for P3060QDS board
powerpc/83xx: Add shutdown request support to MCU handling on MPC8349 MITX
powerpc/85xx: Make kexec to interate over online cpus
powerpc/fsl_booke: Fix comment in head_fsl_booke.S
powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices
powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver
powerpc/85xx: Add 'fsl,pq3-gpio' compatiable for GPIO driver
powerpc/86xx: Correct Gianfar support for GE boards
powerpc/cpm: Clear muram before it is in use.
drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager
powerpc/fsl_msi: add support for "msi-address-64" property
powerpc/85xx: Setup secondary cores PIR with hard SMP id
powerpc/fsl-booke: Fix settlbcam for 64-bit
powerpc/85xx: Adding DCSR node to dtsi device trees
powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards
powerpc/85xx: fix PHYS_64BIT selection for P1022DS
powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map
powerpc: respect mem= setting for early memory limit setup
powerpc: Update corenet64_smp_defconfig
powerpc: Update mpc85xx/corenet 32-bit defconfigs
...
Fix up trivial conflicts in:
- arch/powerpc/configs/40x/hcu4_defconfig
removed stale file, edited elsewhere
- arch/powerpc/include/asm/udbg.h, arch/powerpc/kernel/udbg.c:
added opal and gelic drivers vs added ePAPR driver
- drivers/tty/serial/8250.c
moved UPIO_TSI to powerpc vs removed UPIO_DWAPB support
* 'next/cleanup3' of git://git.linaro.org/people/arnd/arm-soc: (79 commits)
ARM: SAMSUNG: Move fimc plat. device from board files to plat-samsung
ARM: SAMSUNG: Cleanup resources by using macro
ARM: SAMSUNG: Cleanup plat-samsung/devs.c and devs.h
ARM: S5P: To merge devs.c files to one devs.c
ARM: S3C64XX: To merge devs.c files to one devs.c
ARM: S3C24XX: To merge s3c24xx devs.c files to one devs.c
ARM: S5P64X0: Add Power Management support
ARM: S5P: Make the sleep code common for S5P series SoCs
ARM: S5P: Make the common S5P PM code conditionally compile
ARM: SAMSUNG: Move S5P header files to plat-samsung
ARM: SAMSUNG: Move S3C24XX header files to plat-samsung
ARM: SAMSUNG: Moving each SoC support header files
ARM: SAMSUNG: Consolidate plat/pll.h
ARM: SAMSUNG: Consolidate plat/pwm-clock.h
ARM: SAMSUNG: Cleanup mach/clkdev.h
ARM: SAMSUNG: remove sdhci default configuration setup platform helper
ARM: EXYNOS4: Add FIMC device on SMDKV310 board
ARM: EXYNOS4: Add header file protection macros
ARM: EXYNOS4: Add usb ehci device to the SMDKV310
ARM: S3C2443: Add hsspi-clock from pclk and rename S3C2443 hsspi sclk
...
Fix up conflicts in
- arch/arm/mach-exynos4/{Kconfig,clock.c}
ARM_CPU_SUSPEND, various random device tables (gah!)
- drivers/gpio/Makefile
sa1100 gpio added, samsung gpio drivers merged
As per example from the other ARM boards, push the PXA
GPIO driver down to the GPIO subsystem so it can be consolidated.
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Move the driver to the place where it is expected to be nowadays. Also
rename its CONFIG-name to match the rest and adapt the defconfigs.
Finally, move selection of REQUIRE_GPIOLIB or WANTS_OPTIONAL_GPIOLIB to
the platforms, because this option is per-platform and not per-driver.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
This patch adds support for Samsung GPIOs with one gpio driver
and removes old GPIO drivers which are drivers/gpio-s3c24xx.c,
gpio-s3c64xx.c, gpio-s5p64x0.c, gpio-s5pc100.c, gpio-s5pv210.c,
gpio-exynos4.c, gpio-plat-samsung.c, plat-samsung/gpio-config.c
and gpio.c to support each Samsung SoCs before. Because the
gpio-samsung.c can replace old Samsung GPIO drivers.
Basically, the gpio-samsung.c has been made by their merging
and removing duplicated definitions.
Note: gpio-samsung.c includes some SoC dependent codes and it
will be replaced next time.
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
[kgene.kim@samsung.com: squash the removing and adding patches]
[kgene.kim@samsung.com: fixes bug during to register of gpio_chips]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
As per example from the other ARM boards, push the SA100
GPIO driver down to the GPIO subsystem so it can be consolidated.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per example from the other ARM boards, push the LPC32XX
GPIO driver down to the GPIO subsystem so it can be consolidated.
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: Barry Song <bs14@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per example from the other ARM boards, push the DaVinci TNET
GPIO driver down to the GPIO subsystem so it can be consolidated.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per example from the other ARM boards, push the DaVinci GPIO
driver down to the GPIO subsystem so it can be consolidated.
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
As per example from the other ARM boards, push the KS8695 GPIO
driver down to the GPIO subsystem so it can be consolidated.
Cc: zeal <zealcook@gmail.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Daniel Silverstone <dsilvers@simtec.co.uk>
Acked-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Migrate the driver for the v7-based MSM chips into drivers/gpio. The
driver is unchanged, only moved.
Change-Id: I810db5b50b71cdca4e869aa0d0310f7f48781a55
Signed-off-by: David Brown <davidb@codeaurora.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Migrate the driver for the v6-based MSM chips into drivers/gpio. The
driver is unchanged, only moved.
Change-Id: I03ba597b95b4d62b42da112a8efac88d67aa40f9
Signed-off-by: David Brown <davidb@codeaurora.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
TPS65912 has five GPIOs that can be configured for different
purposes.
Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
GPIO drivers are getting consolidated into drivers/gpio. While at it,
change the driver name to mpc5200-gpio* to avoid collisions.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
DA9052 PMIC has 16 bit GPIO bus for peripheral control.
This patch add support for the GPIO pins on the DA9052.
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
As part of the gpio driver consolidation, this patch moves the Tegra driver
into drivers/gpio
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Colin Cross <ccross@android.com>
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>
The GPIO driver should reside in drivers/gpio.
v3: Change Kconfig option to def_bool y
v2: Make the Kconfig symbol a silent option, dependent on ARCH_EP93XX
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
GPIO drivers are getting moved to drivers/gpio for cleanup and
consolidation. This patch moves the plat-mxc driver. Follow up
patches will clean it up and make it a fine upstanding gpio driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
GPIO drivers are getting moved to drivers/gpio for cleanup and
consolidation. This patch moves the mxs driver. Follow up patches
will clean it up and make it a fine upstanding example of a gpio
driver.
v2: Removed header file entirely and put struct definition directly
into driver. The struct isn't used anywhere else in the kernel.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6:
gpio/pch_gpio: Support new device ML7223
gpio: make gpio_{request,free}_array gpio array parameter const
GPIO: OMAP: move to drivers/gpio
GPIO: OMAP: move register offset defines into <plat/gpio.h>
gpio: Convert gpio_is_valid to return bool
gpio: Move the s5pc100 GPIO to drivers/gpio
gpio: Move the s5pv210 GPIO to drivers/gpio
gpio: Move the exynos4 GPIO to drivers/gpio
gpio: Move to Samsung common GPIO library to drivers/gpio
gpio/nomadik: add function to read GPIO pull down status
gpio/nomadik: show all pins in debug
gpio: move Nomadik GPIO driver to drivers/gpio
gpio: move U300 GPIO driver to drivers/gpio
langwell_gpio: add runtime pm support
gpio/pca953x: Add support for pca9574 and pca9575 devices
gpio/cs5535: Show explicit dependency between gpio_cs5535 and mfd_cs5535
The GPIO driver should reside in drivers/gpio/ for better
organization.
Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Move the Samsung s5pc100 SoC GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Move the Samsung s5pv210 SoC GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Move the Samsung Exynos4 series SoCs GPIO driver to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
It's common gpiolib for recent Samsung SoCs. Move to drivers/gpio
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This moves the Nomadik GPIO driver out of arch/arm/plat-nomadik
and into the desired location indicated by the subsystem
maintainer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[grant.likely: squashed with kconfig fixup]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This moves the U300 GPIO driver out of arch/arm/mach-u300 and into
the desired location indicated by the subsystem maintainer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Allow GPIO_BASIC_MMIO_CORE to be used to provide an accessor library
for implementing GPIO drivers whilst abstracting the register access
detail. Based on a patch from Anton Vorontsov[1] and adapted to allow
bgpio_chip to be embedded in another structure.
Changes since v1:
- Register the gpio_chip in the platform device probe
1. https://lkml.org/lkml/2011/4/19/401
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The build files for drivers/gpio has some wording and comments
about the directory being reserved exclusively for GPIO expanders
(according to the gpio.txt file these are on external busses) and
this has been false for some time. We already have PL061 and
Xilinx drivers which are in silicon and now I'm moving more
silicon drivers here, so delete this and reword it a bit.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
To get rid of port expanders, the free GPIOs of ab8500
can be used. There are 42 GPIO pins. Out of which 16
are interrupt capable.This patch implements 16 virtual
IRQ mapped to 16 interrupt capable AB8500 GPIOs.
Signed-off-by: Bibek Basu <bibek.basu@stericsson.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
[Renamed header file as per MFD structure]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
ML7213 is a companion chip for Intel Atom E6xx series. This driver can be
used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output Hub) which is for
IVI(In-Vehicle Infotainment) use. This driver can access the IOH's GPIO
device.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: Marc Zyngier <maz@misterjones.org>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Rename the tc35892 core/gpio drivers to tc3589x to include
new variants in the same mfd core
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
This is needed for supporting the upcoming VX855 camera and OLPC DCON
drivers, as well as the advanced viafb features on non-OLPC hardware
based on this chip.
Based on earlier work by Harald Welte.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Topcliff PCH is the platform controller hub that is going to be used in
Intel's upcoming general embedded platform. All IO peripherals in
Topcliff PCH are actually devices sitting on AMBA bus. Topcliff PCH has
GPIO I/F. Using this I/F, it is able to access system devices connected
to GPIO.
[akpm@linux-foundation.org: ese DEFINE_PCI_DEVICE_TABLE (per Joe Perches)]
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Tomoya MORINAGA <morinaga526@dsn.okisemi.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add support for generic 74x164 serial-in/parallel-out 8-bits shift
register. This driver can be used as a GPIO output expander.
[akpm@linux-foundation.org: remove unused local `refresh']
Signed-off-by: Miguel Gaio <miguel.gaio@efixo.com>
Signed-off-by: Juhos Gabor <juhosg@openwrt.org>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The basic GPIO controllers may be found in various on-board FPGA and ASIC
solutions that are used to control board's switches, LEDs, chip-selects,
Ethernet/USB PHY power, etc.
These controllers may not provide any means of pin setup
(in/out/open drain).
The driver supports:
- 8/16/32/64 bits registers;
- GPIO controllers with clear/set registers;
- GPIO controllers with a single "data" register;
- Big endian bits/GPIOs ordering (mostly used on PowerPC).
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Samuel Ortiz <sameo@linux.intel.com>,
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add support for the GPIOs on STMPE I/O Expanders.
[l.fu@pengutronix.de: fix set direction input]
[l.fu@pengutronix.de: set GPIO alternate function while requesting]
Acked-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Update Kconfig and Makefile in drivers/gpio to discourage inappropriate
addition of platform-specific code.
[akpm@linux-foundation.org: fix tpyo]
Signed-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add a GPIO driver to support the GPIOs on the TC35892 I/O Expander.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The Janz VMOD-TTL is a MODULbus daughterboard which fits onto any MODULbus
carrier board. It essentially consists of some various logic and a Zilog
Z8536 CIO Counter/Timer and Parallel IO Unit.
The board must be physically configured with jumpers to enable a user to
drive output signals. I am only interested in outputs, so I have made this
driver as simple as possible. It only supports a very minimal subset of the
features provided by the Z8536 chip.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This patch adds a new GPIO driver for the RDC321x SoC GPIO controller.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Add the MAX7300-I2C variant of the MAX7301-SPI version. Both chips share
the same core logic, so the generic part of the in-kernel SPI-driver is
refactored into a generic part. The I2C and SPI specific funtions are
then wrapped into seperate drivers picking up the generic part.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Juergen Beisert <j.beisert@pengutronix.de>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A GPIO driver for the Timberdale FPGA found on the Intel Atom board
Russellville.
The GPIO driver also has an IRQ-chip to support interrupts on the pins.
Signed-off-by: Richard Röjfors <richard.rojfors@mocean-labs.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip backend
(allowing GPIO users to use the generic GPIO API if desired) while also
allowing architecture-specific users directly (via the cs5535_gpio_*
functions).
Tested on an OLPC machine. Some Leemotes also use CS5536 (with a mips
cpu), which is why this is in drivers/gpio rather than arch/x86.
Currently, it conflicts with older geode GPIO support; once MFGPT support
is reworked to also be more generic, the older geode code will be removed.
Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Jordan Crouse <jordan@cosmicpenguin.net>
Cc: David Brownell <david-b@pacbell.net>
Reviewed-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The Langwell chip is the IO hub for Intel Moorestown platform which has a
64-pin gpio block device inside. It is exposed as a dedicated PCI device.
We use it to control outside peripheral as well as to do IRQ demuxing.
The gpio block uses MSI to send level type interrupt to IOAPIC.
Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Cc: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A GPIO driver for the Freescale MC33880 High/Low side switch
Signed-off-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add support for the GPIO pins on the WM831x. No direct support is
currently supplied for configuring non-gpiolib functionality such
as pull configuration and alternate functions, soft configuration
of these will be provided in a future patch.
Currently use of these pins as interrupts is not supported due to
the ongoing issues with generic irq not support interrupt controllers
on interrupt driven buses. Users can directly request the interrupts
with the wm831x-specific APIs currently provided if required.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This is a driver for the ARM PrimeCell PL061 GPIO AMBA peripheral. The
driver is implemented using the gpiolib framework.
This driver also includes support for the use of the PL061 as an interrupt
controller (secondary).
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This driver supports the Xilinx XPS GPIO IP core which has the typical
GPIO features.
Signed-off-by: Kiran Sutariya <kirans@xilinx.com>
Signed-off-by: John Linn <john.linn@xilinx.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: "Grant Likely" <grant.likely@secretlab.ca>
Cc: <avorontsov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This adds basic support for the GPIOs in the twl4030 power management
chip. That includes two open drain LED drivers, and the use of GPIO-0
(and GPIO-1) as MMC/SD card detect switches which can control whether
the VMMC1 (and VMMC2) regulators are active.
This version of the code has a debounce call that will probably be
replaced before long, when a more generic interface exists.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
This adds a driver supporting a family of I2C port expanders from Maxim,
which includes the MAX7319 and MAX7320-7327 chips.
[dbrownell@users.sourceforge.net: minor fixes]
Signed-off-by: Jack Ren <jack.ren@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds functionality to the gpio-lib subsystem to make it
possible to enable the gpio-lib code even if the architecture code didn't
request to get it built in.
The archtitecture code does still need to implement the gpiolib accessor
functions in its asm/gpio.h file. This patch adds the implementations for
x86 and PPC.
With these changes it is possible to run generic GPIO expansion cards on
every architecture that implements the trivial wrapper functions. Support
for more architectures can easily be added.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: David Brownell <david-b@pacbell.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Samuel Ortiz <sameo@openedhand.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This adds the bt8xxgpio driver. The purpose of the bt8xxgpio driver is to
export all of the 24 GPIO pins available on Brooktree 8xx chips to the
kernel GPIO infrastructure.
This makes it possible to use a physically modified BT8xx card as
cheap digital GPIO card.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Maxim's MAX7301 is an SPI GPIO expander with 28 GPIOs. Note: MAX7301's
interrupt feature is not supported yet.
[akpm@linux-foundation.org: coding-style fixes]
[g.liakhovetski@pengutronix.de: Fix inaccuracies in comments, check spi_setup()
return code, mask off high byte in max7301_read()]
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This second part of an extension to support more pca953x chips renames the C
and Kconfig symbols. All affected files were updated by sed, except for a
couple of obvious exceptions. It also updates the Kconfig helptext.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
First part of an extension to let the pca9539 driver support more chips,
starting with pca9534, pca9535, pca9536, pca9537, and pca9538.
This renames the files and modifies the Makefile.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This adds a new-style I2C driver with basic support for the sixteen bit
PCA9539 GPIO expanders. These chips have multiple registers, push-pull output
drivers, and (not supported in this patch) pin change interrupts.
Board-specific code must provide "pca9539_platform_data" with each chip's
"i2c_board_info". That provides the GPIO numbers to be used by that chip, and
callbacks for board-specific setup/teardown logic.
Derived from drivers/i2c/chips/pca9539.c (which has no current known users).
This is faster and simpler; it uses 16-bit register access, and cache the
OUTPUT and DIRECTION registers for fast access
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Basic driver for 8-bit SPI based MCP23S08 GPIO expander, without support for
IRQs or the shared chipselect mechanism.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is a new-style I2C driver for most common 8 and 16 bit I2C based
"quasi-bidirectional" GPIO expanders: pcf8574 or pcf8575, and several
compatible models (mostly faster, supporting I2C at up to 1 MHz).
The driver exposes the GPIO signals using the platform-neutral GPIO
programming interface, so they are easily accessed by other kernel code. The
lack of such a flexible kernel API has been a big factor in the proliferation
of board-specific drivers for these chips... stuff that rarely makes it
upstream since it's so ugly. This driver will let such boards use standard
calls.
Since it's a new-style driver, these devices must be configured as part of
board-specific init. That eliminates the need for error-prone manual
configuration of module parameters, and makes compatibility with legacy
drivers (pcf8574.c, pc8575.c) for these chips easier (there's a clear
either/or disjunction).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Provide new implementation infrastructure that platforms may choose to use
when implementing the GPIO programming interface. Platforms can update their
GPIO support to use this. In many cases the incremental cost to access a
non-inlined GPIO should be less than a dozen instructions, with the memory
cost being about a page (total) of extra data and code. The upside is:
* Providing two features which were "want to have (but OK to defer)" when
GPIO interfaces were first discussed in November 2006:
- A "struct gpio_chip" to plug in GPIOs that aren't directly supported
by SOC platforms, but come from FPGAs or other multifunction devices
using conventional device registers (like UCB-1x00 or SM501 GPIOs,
and southbridges in PCs with more open specs than usual).
- Full support for message-based GPIO expanders, where registers are
accessed through sleeping I/O calls. Previous support for these
"cansleep" calls was just stubs. (One example: the widely used
pcf8574 I2C chips, with 8 GPIOs each.)
* Including a non-stub implementation of the gpio_{request,free}() calls,
making those calls much more useful. The diagnostic labels are also
recorded given DEBUG_FS, so /sys/kernel/debug/gpio can show a snapshot
of all GPIOs known to this infrastructure.
The driver programming interfaces introduced in 2.6.21 do not change at all;
this infrastructure is entirely below those covers.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add an empty drivers/gpio directory for gpiolib infrastructure and GPIO
expanders. It will be populated by later patches.
This won't be the only place to hold such gpio_chip code. Many external chips
add a few GPIOs as secondary functionality (such as MFD drivers) and platform
code frequently needs to closely integrate GPIO and IRQ support.
This is placed *early* in the build/link sequence since it's common for other
drivers to depend on GPIOs to do their work, so they must be initialized early
in the device_initcall() sequence.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Eric Miao <eric.miao@marvell.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mathias Nyman