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Using for_each_set_bit() to simplify the code.
spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Here we provide a means to probe and extract vital information
from Device Tree when booting with it enabled. Without this
patch sub-devices wouldn't be able to reference the tc3589x-gpio
expander from Device Tree.
CC: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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In preparation for Device Tree enablement all IRQ controllers
should control their own IRQ domain. This patch provides just
that for the tc3589x GPIO expander.
CC: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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6e20a0a429bd4dc07d6de16d9c247270e04e4aa0
(gpio: pcf857x: enable gpio_to_irq() support)
added new smatch warnings
drivers/gpio/gpio-pcf857x.c:288 pcf857x_probe() error: we previously \
assumed 'pdata' could be null (see line 277)
drivers/gpio/gpio-pcf857x.c:364 pcf857x_probe() warn: variable dereferenced\
before check 'pdata' (see line 292)
drivers/gpio/gpio-pcf857x.c:421 pcf857x_remove() error: we previously\
assumed 'pdata' could be null (see line 410)
This patch fixes it
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The shift registers have an output pin that, when enabled, propagates
the values of its internal register to the pins. If another value comes
to the register while the output pin is disabled, this new value will
makae the older shift into the next register in the chain.
This patch adds support for daisy-chaining the registers, using the
regular SPI chip select mechanism to manage the output pin, and the
registers-number dt property to set the number of chained registers.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Then we can remove irq_to_priv() function.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and
clk_enable, and clk_disable and clk_unprepare. They make the code more
concise, and ensure that clk_unprepare is called when clk_enable fails.
A simplified version of the semantic patch that introduces calls to these
functions is as follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression e;
@@
- clk_prepare(e);
- clk_enable(e);
+ clk_prepare_enable(e);
@@
expression e;
@@
- clk_disable(e);
- clk_unprepare(e);
+ clk_disable_unprepare(e);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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As a first step towards migrating davinci platforms to use common clock
framework, replace all instances of clk_enable() with clk_prepare_enable()
and clk_disable() with clk_disable_unprepare(). Until the platform is
switched to use the CONFIG_HAVE_CLK_PREPARE Kconfig variable, this just
adds a might_sleep() call and would work without any issues.
This will make it easy later to switch to common clk based implementation
of clk driver from DaVinci specific driver.
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The fix for MFD part is merged so remove the broken mark for da9052 gpio driver.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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pcf857x chip has some pins, but interrupt pin is only 1 pin.
And gpiolib requests 1 interrupt per 1 gpio pin.
Thus, this patch added demuxed irq to pcf857x driver,
and enabled gpio_to_irq().
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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gpio_chip.can_sleep is 0, but current code uses mutex in pch_gpio_set
pch_gpio_get and pch_gpio_direction_input functions.
Thus those functions are not callable from interrupt context.
This patch converts mutex into spinlock.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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gpio_chip.can_sleep is 0, but current code uses mutex in ioh_gpio_set,
ioh_gpio_get and ioh_gpio_direction_input functions.
Thus those functions are not callable from interrupt context.
This patch converts mutex into spinlock.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When dumping a collection of items via seq_file, it is recommended to
use the iterator interface. For the gpiolib debugfs interface this can
be done to dump each GPIO chip in turn.
Note that for gpiolib this is a little cumbersome because it does not
provide a list of registered GPIO chips and the only way to iterate is
over each GPIO individually. Once a chip is found, the number of GPIOs
it provides can be skipped as a small optimization.
This patch was requested by Arnd Bergmann here:
http://article.gmane.org/gmane.linux.ports.tegra/3535
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Commit 7212157267 ("GPIO: gpio-pxa: fix devicetree functions") added an
"xlate" function pointer to the irq_domain_ops, but this function is nor
declared or defined anywhere when CONFIG_OF is disabled, causing the
build error:
drivers/gpio/gpio-pxa.c:532:11: error: 'irq_domain_xlate_twocell' undeclared here (not in a function)
Extending the DT-only code section to cover the irq_domain_ops and the
pxa_gpio_dt_ids solves this problem and makes it clearer which code is
actually used without DT.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull gpio fixes from Linus Walleij:
- Fix a resource leak in the SCH driver
- Fix the register address calculation in the MSIC driver
- Fix the PXA driver's devicetree functions
- Delete redundant shadow variable leftovers in the MXC driver
- Specify the GPIO base for the device tree probe in the MXC driver
- Add a modalias for the i.MX driver
- Fix off-by-one bug in the Samsung driver
- Fix erroneous errorpath in the Langwell driver
* tag 'gpio-fixes-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
drivers/gpio/gpio-langwell.c: fix error return code
gpio: samsung: Fix off-by-one bug in gpio addresses
ARM: dts: imx: add alias for gpio
gpio/mxc: specify gpio base for device tree probe
gpio/mxc: remove redundant shadow variables initialization
GPIO: gpio-pxa: fix devicetree functions
gpio: msic: Fix calculating register address in msic_gpio_to_oreg()
gpio-sch: Fix leak of resource
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The newly added gpio-em driver marks its em_gio_irq_domain_cleanup
function as __devexit, which would lead to that function being
discarded in case CONFIG_HOTPLUG is disabled. However, the function
is also called by the error handling logic em_gio_probe, which
would cause a jump into a NULL pointer if it was removed from the
kernel or module.
Without this patch, building kzm9d_defconfig results in:
WARNING: drivers/gpio/built-in.o(.devinit.text+0x330): Section mismatch in reference from the function em_gio_probe() to the function .devexit.text:em_gio_irq_domain_cleanup()
The function __devinit em_gio_probe() references
a function __devexit em_gio_irq_domain_cleanup().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __devexit annotation of
em_gio_irq_domain_cleanup() so it may be used outside an exit section.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Magnus Damm <damm@opensource.se>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
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Convert a 0 error return code to a negative one, as returned elsewhere in the
function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier ret;
expression e,e1,e2,e3,e4,x;
@@
(
if (\(ret != 0\|ret < 0\) || ...) { ... return ...; }
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ret = 0
)
... when != ret = e1
*x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...);
... when != x = e2
when != ret = e3
*if (x == NULL || ...)
{
... when != ret = e4
* return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Move gpc4 to the end of the automatically processed gpio controllers so
we don't taint the automatic offset calculation.
This bug caused all controllers coming after gpc4 to map to the
incorrect address. The result is <&gpd1 0 0 0 0> would actually map to
GPIO 0 in gpd0.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Doug Anderson <dianders@chromium.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Currently, unlike the non-DT probe where the gpio base is specified
with pdev->id, the DT probe uses the base dynamically allocated by
gpio core, which uses a completely different numbering scheme. This
causes two issues to user space applications which access sysfs entry
/sys/class/gpio/gpioN.
* It breaks the compatibility with user space applications between
non-DT and DT kernels.
* It's not intuitive and sometimes hard for users to map the Linux
gpio number to the actual hardware pin.
Use alias to identify the gpio port/bank, and then the gpio base
can be specified with port id to solve above issues. If alias is not
defined in device tree, the base number dynamically allocated by gpio
core will be used.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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With commit 3e11f7b (gpio/generic: initialize basic_mmio_gpio shadow
variables properly) in place, the shadow variables initialization is
being done in generic driver bgpio_init call.
Remove the redundant shadow variables initialization from gpio-mxc
driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Provide an of_xlate function for the PXA GPIO chips and make it work for
devicetree environments.
Successfully tested on a PXA3xx board.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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In the case offset is 20 ... 23, the equation to get the register should be:
INTEL_MSIC_GPIO1HV0CTLO - offset + 20
With above equation, we can get below mapping between offset and the register:
offset is 20: INTEL_MSIC_GPIO1HV0CTLO
offset is 21: INTEL_MSIC_GPIO1HV1CTLO
offset is 22: INTEL_MSIC_GPIO1HV2CTLO
offset is 23: INTEL_MSIC_GPIO1HV3CTLO
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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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
2761a6394516 ("mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix
issues").
In particular, commit 2761a6394516 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 2761a6394516 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
...
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to GPIO will now
hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP
and PCA953X drivers.
Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c
* tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available
gpiolib: Defer failed gpio requests by default
MAINTAINERS: add entry OMAP GPIO driver
gpio/pca953x: increase variables size to support 24 bit of data
GPIO: PCA953X: Increase size of invert variable to support 24 bit
gpio/omap: move bank->dbck initialization to omap_gpio_mod_init()
gpio/mxc: use the edge_sel feature if available
gpio: propagate of_parse_phandle_with_args errors
gpio: samsung: add flags specifier to device-tree binding
gpiolib: Add support for Wolfson Microelectronics Arizona class devices
gpio: gpio-lpc32xx: Add gpio_to_irq mapping
gpio: pcf857x: share 8/16 bit access functions
gpio: LPC32xx: Driver cleanup
MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry
gpiolib: wm8994: Convert to devm_kzalloc()
gpiolib: wm8994: Use irq_domain mappings for gpios
gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips
gpio/tca6424: merge I2C transactions, remove cast
gpio/of: fix a typo of comment message
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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>
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Pull arm-soc sparse IRQ conversion from Arnd Bergmann:
"The I.MX platform is getting converted to use sparse IRQs. We are
doing this for all platforms over time, because this is one of the
requirements for building a multiplatform kernel, and generally a good
idea."
* tag 'irq' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: imx: select USE_OF
ARM: imx: Fix build error due to missing irqs.h include
ARM: imx: enable SPARSE_IRQ for imx platform
ARM: fiq: change FIQ_START to a variable
tty: serial: imx: remove the use of MXC_INTERNAL_IRQS
ARM: imx: remove unneeded mach/irq.h inclusion
i2c: imx: remove unneeded mach/irqs.h inclusion
ARM: imx: add a legacy irqdomain for mx31ads
ARM: imx: add a legacy irqdomain for 3ds_debugboard
ARM: imx: pass gpio than irq number into mxc_expio_init
ARM: imx: leave irq_base of wm8350_platform_data uninitialized
dma: ipu: remove the use of ipu_platform_data
ARM: imx: move irq_domain_add_legacy call into avic driver
ARM: imx: move irq_domain_add_legacy call into tzic driver
gpio/mxc: move irq_domain_add_legacy call into gpio driver
ARM: imx: eliminate macro IRQ_GPIOx()
ARM: imx: eliminate macro IOMUX_TO_IRQ()
ARM: imx: eliminate macro IMX_GPIO_TO_IRQ()
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of_get_named_gpio_flags() and of_get_named_gpio() return -EPROBE_DEFER if the
respective GPIO is not (yet) available. This is useful if driver's probe()
functions try to get a GPIO whose controller isn't probed yet. Thus, the driver
can be probed again later on.
The function still returns -EINVAL on other errors (parse error or node doesn't
exist). This way, the case of an optional/intentionally missing GPIO is handled
appropriately.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since users must be explicitly provided with a GPIO number in order to
request one the overwhelmingly common case for failing to request will
be that the required GPIO driver has not yet registered and we should
therefore defer until it has registered.
In order to avoid having to code this logic in individual drivers have
gpio_request() return -EPROBE_DEFER when failing to look up the GPIO.
Drivers which don't want this behaviour can override it if they desire.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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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>
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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>
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Since the bank->dbck initialization in a one time operation there
is no need to keep this within gpio_debounce(). Therefore, moving
clk_get(bank->dbck) to omap_gpio_mod_init(). Since the value of
bank->dbck would be NULL at the beginning, this check has been
removed.
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Reported-by: Paul Walmsley <paul@pwsan.com>
Reviewed-by: Jon Hunter <jon-hunter@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Cousson, Benoit <b-cousson@ti.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Some mxc processors have an edge_sel feature, which allows the IRQ to be
triggered by any edge.
This patch makes use of this feature if available, which skips mxc_flip_edge().
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Sascha Hauer <kernel@pengutronix.de>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Make of_get_named_gpio_flags propagate any error it receives from
of_parse_phandle_with_args instead of inconditionally returning -EINVAL.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This adds a flags field to the gpio specifier for Samsung. I didn't
want to add yet another field in the already quite long specifier, so
I decided to compress it together with the Pull Up/Down settings instead.
This is needed to, for example, have a gpio-keys input that is active low.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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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>
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This patch helps mapping with gpio_to_irq for the GPIOs that are irq enabled.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Tested-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch adds 8/16 bit write/read functions,
and shared gpio input/output/set/get functions.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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