This converts the mcp23s08 driver to be able to be used with
device tree.

There is a "spi-present-mask" device tree property, that allows to
use multiple of this spi chips on the same chipselect.

v4:
- removed the ability to specify the pullup from device tree
- updated binding doc

v3:
- removed mcp,chips device tree property in favour of a
    mcp,spi-present-mask and a flag for the pullup of every gpio
- seperated the match table. Now there is one for i2c and one for spi
- do the of reading stuff on stack of the probe function - no devm
    any more

v2:
- squashed booth patches together
- fixed build warning, when CONFIG_OF is not defined
- use of_match_ptr macro for of_match_table
Signed-off-by: NLars Poeschel <poeschel@lemonage.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

When booting with device-tree the function pointer for detecting context
loss is not populated. Ideally, the pm_runtime framework should be
enhanced to allow a means for reporting context/state loss and we could
avoid populating such function pointers altogether. In the interim until
a generic non-device specific solution is in place, force a restore of
the gpio bank when enabling the gpio controller.

Adds a new device-tree property for the OMAP GPIO controller to indicate
if the GPIO controller is located in a power-domain that never loses
power and hence will always maintain its logic state.
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: NKevin Hilman <khilman@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The OMAP GPIO interrupt service routine is checking each bit in the
GPIO interrupt status register to see which bits are set. It is not
efficient to check every bit especially if only a few bits are set.
Therefore, instead of checking every bit use the __ffs() function,
which returns the location of the first set bit, to find all the set
bits.

This optimisation was suggested-by and developed in collaboration
with Felipe Balbi.
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: NKevin Hilman <khilman@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

68942edb (gpio/omap: fix wakeups
on level-triggered GPIOs) already restores the fallingdetect and
risingdetect contexts in *_runtime_resume(). These registers were
modified in *_runtime_suspend() to include even those configured
as level-triggered since only edge-triggered gpios can generate
wakeup events. Therefore, the old context restores of the same
registers present later in the code is not needed any more.
Remove them.
Signed-off-by: NTarun Kanti DebBarma <tarun.kanti@ti.com>
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: NKevin Hilman <khilman@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Currently the IRQ domain is not freed once allocated, in the case where
omap_gpio_probe() fails. Therefore, ensure we free the domain if the
probe does fail. Furthermore, the local variable "ret" is not needed
and so remove this.
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: NKevin Hilman <khilman@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

There is no general support for 64-bit big endian accesses, so that is
left unsupported.
Signed-off-by: NAndreas Larsson <andreas@gaisler.com>
Acked-by: NAnton Vorontsov <anton@enomsg.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The of_device_id table is supposed to be zero-terminated.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This patch adds a dedicated dbg_show function to the gpio-mvebu driver.
In addition to the generic gpiolib informations, this function displays
informations related with the specific Marvell registers (blink enable,
data in polarity, interrupt masks and cause).
Signed-off-by: NSimon Guinot <simon.guinot@sequanux.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The bit_per_word can be set in the OF Device tree, so no need to force it as with
the platform_data when using OF Platform
Signed-off-by: NPatrick Vasseur <patrick.vasseur@c-s.fr>
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-tps65910.c:136: ERROR: space required before the open parenthesis '('
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-timberdale.c:171: ERROR: else should follow close brace '}'
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-tc3589x.c:285: ERROR: code indent should use tabs where possible
 gpio/gpio-tc3589x.c:286: ERROR: code indent should use tabs where possible
 gpio/gpio-tc3589x.c:287: ERROR: code indent should use tabs where possible
 gpio/gpio-tc3589x.c:347: ERROR: code indent should use tabs where possible
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-stp-xway.c:220: ERROR: trailing whitespace
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-sch.c:206: ERROR: switch and case should be at the same indent

Also remove blank lines
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-pxa.c:605: ERROR: space required after that ',' (ctx:VxV)
 gpio/gpio-pxa.c:672: ERROR: space prohibited after that open parenthesis '('
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-pca953x.c:150: ERROR: else should follow close brace '}'
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-omap.c:697: ERROR: space required before the open parenthesis '('
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpio-mvebu.c:120: ERROR: space required before the open parenthesis '('
 gpio/gpio-mvebu.c:136: ERROR: space required before the open parenthesis '('
 gpio/gpio-mvebu.c:154: ERROR: space required before the open parenthesis '('
 gpio/gpio-mvebu.c:404: ERROR: space required before the open parenthesis '('
 gpio/gpio-mvebu.c:476: ERROR: "(foo*)" should be "(foo *)"
 gpio/gpio-mvebu.c:480: ERROR: "(foo*)" should be "(foo *)"
 gpio/gpio-mvebu.c:484: ERROR: "(foo*)" should be "(foo *)"
 gpio/gpio-mvebu.c:512: ERROR: space prohibited after that '!' (ctx:BxW)
 gpio/gpio-mvebu.c:518: ERROR: space prohibited after that '!' (ctx:BxW)
 gpio/gpio-mvebu.c:518: ERROR: space required before the open brace '{'
 gpio/gpio-mvebu.c:563: ERROR: space prohibited after that '!' (ctx:BxW)
 gpio/gpio-mvebu.c:570: ERROR: trailing whitespace
 gpio/gpio-mvebu.c:577: ERROR: space required before the open parenthesis '('
 gpio/gpio-mvebu.c:635: ERROR: space prohibited after that '!' (ctx:BxW)
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Fix :
 gpio/gpiolib-of.c:64: ERROR: code indent should use tabs where possible
Signed-off-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use the wrapper functions for getting and setting the driver data
using spi_device instead of using dev_{get|set}_drvdata with
&spi->dev, so we can directly pass a struct spi_device.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use the wrapper functions for getting and setting the driver data
using spi_device instead of using dev_{get|set}_drvdata with
&spi->dev, so we can directly pass a struct spi_device.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

dev_err() is more preferred than printk().
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use the newly introduced devm_ioremap_resource() instead of
devm_request_and_ioremap() which provides more consistent error handling.

devm_ioremap_resource() provides its own error messages; so all explicit
error messages can be removed from the failure code paths.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: NThierry Reding <thierry.reding@avionic-design.de>
Acked-by: NTony Prisk <linux@prisktech.co.nz>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Update the Emma Mobile GPIO driver to make use of devm
functions. This simplifies the error handling and makes
the code more compact.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Lynxpoint gpio driver uses X86 specific io-ports to control gpios
Signed-off-by: NMathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

It is more readable for humans to use double-bang (!!) to convert the value
to pure boolean before it is returned.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The E6xx (TunnelCreek) CPUs have 9 GPIO lines in the resume well. Update
the resume functions to allow for more than 8 GPIO lines, using the core
functions as a template.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: NDarren Hart <dvhart@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Signed-off-by: NNikolay Balandin <nbalandin@dev.rtsoft.ru>
Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Set it once is enough, and it's done in vprbrd_gpiob_set() which is called by
vprbrd_gpiob_direction_output().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NLars Poeschel <poeschel@lemonage.de>
Acked-by: NLars Poeschel <poeschel@lemonage.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Stop checking for pin availability in direction and get functions.
These functions can be called repeatedly, so checking every time is
bad for performance. Now that requesting GPIO pins is no longer
optional, checking for availability at pin request time is enough.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Update the Emma Mobile GPIO driver to add DT support.

The patch simply adds a two-cell xlate function and
updates the probe code to allow configuration via DT
using the "ngpios" property plus OF id in the same
style as gpio-mvebu.c. The code is also adjusted to
use postcore_initcall() to force early setup.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

For OMAP devices, if a gpio is being used as an interrupt source but has
not been requested by calling gpio_request(), a call to request_irq()
may cause the kernel hang because the gpio bank may be disabled and
hence the register access will fail. To prevent such hangs, test for
this case and warn if this is detected.
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NKevin Hilman <khilman@linaro.org>
Tested-by: NJavier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Currently the OMAP GPIO driver uses a legacy mapping for the GPIO IRQ
domain. This is not necessary because we do not need to assign a
specific interrupt number to the GPIO IRQ domain. Therefore, convert
the OMAP GPIO driver to use a linear mapping instead.

Please note that this also allows to simplify the logic in the OMAP
gpio_irq_handler() routine, by using irq_find_mapping() to obtain the
virtual irq number from the GPIO bank and bank index.
Reported-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NJon Hunter <jon-hunter@ti.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: NKevin Hilman <khilman@linaro.org>
Tested-by: NJavier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Tegra only supports, and always enables, device tree. Remove all ifdefs
and runtime checks for DT support from the driver.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>