The 16Z127 is a 32bit GPIO controller on a MCB FPGA.
Every single line can be configured as input and output.

Push pull and open drain are supported as well as setting
a debounce value for the input lines.
Signed-off-by: NAndreas Werner <andy@wernerandy.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The implementation of lp3943_gpio_request/lp3943_gpio_free test pin_used
for tracing the pin usage. However, gpiolib already checks FLAG_REQUESTED
flag for the same purpose. So remove the redundant implementation.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Replace calls to devm_request_mem_region and devm_ioremap with a
direct call to devm_ioremap_resource instead and modify error
handling.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more
clear.

A simplified version of the Coccinelle semantic patch that is used to
make this change is as follows:
//<smpl>
@nm@
expression myname;
identifier i;
@@

struct platform_driver i = { .driver = { .name = myname } };

@@
expression dev,res,size,e1,e;
expression nm.myname;
@@

-if (!devm_request_mem_region(dev, res->start, size,
-                              \(res->name\|dev_name(dev)\|myname\)))
                               {
-   ...
-   return ...;
-}
... when != res->start = e1
e =
-devm_ioremap(dev,res->start,size);
+devm_ioremap_resource(dev,res);

if
-(e == NULL)
+(IS_ERR(e))
{
 ...
-return ...;
+return PTR_ERR(e);
}
//</smpl>

Further, updated error handling by hand as devm_ioremap_resource
gives appropriate error messages, so remove unnecessary error
messages.
Signed-off-by: NAmitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The TS-4800 is an i.MX515 board. Its GPIO driver should only be compiled
for this CPU or for test builds.
Signed-off-by: NJulien Grossholtz <julien.grossholtz@savoirfairelinux.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The original code of gpiodev_add_to_list is not very clear which
lead to bugs or compiling warning, reference the following patches:
Bugs:
1.  Commit ef7c7553 ("gpiolib: improve overlap check of range of
    gpio").
2.  Commit 96098df1 ("gpiolib: fix chip order in gpio list")

Warning:
1.  Commit e28ecca6 ("gpio: fix warning about iterator").
of gpio").

There is a off-list discussion about how to improve it consequently.
This commit try to follow this by rewriting the whole functions.

Tested pass with my gpio mockup driver and test scripts[1].

[1] http://www.spinics.net/lists/linux-gpio/msg09598.htmlSuggested-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NBamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

There is no build dependency for this driver, so enable COMPILE_TEST to get
better build coverage.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

These fields are initialized by bgpio_init() with exactly the same settings
so remove the redundant code.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

I named the field representing the current user of GPIO line as
"label" but this is too vague and ambiguous. Before anyone gets
confused, rename it to "consumer" and indicate clearly in the
documentation that this is a string set by the user of the line.

Also clean up leftovers in the documentation.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

We started to assign the gpio_device as parent for the sysfs
but this changes the expected layout of sysfs. Restore the
previous behaviour.
Signed-off-by: NBamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The 'dev_id' parameter of the GPIO_LOOKUP{,_IDX} macros were removed by
commit ad824783 ("gpio: better lookup method for platform GPIOs").

Update the documentation to reflect that.
Signed-off-by: NGabor Juhos <juhosg@openwrt.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

There is no build dependency for this driver, so enable COMPILE_TEST to get
better build coverage.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

This driver has .can_sleep flag set.
So the pisosr_gpio_get() can be called from contexts that can sleep.
Thus use the cansleep() variant in pisosr_gpio_refresh().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

gpio->load_gpio is optional, so use devm_gpiod_get_optional instead.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NAndrew F. Davis <afd@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

ret variable can contain error values and is compared with zero.
Its type must be signed.

The problem has been detected using coccinelle script
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Make use of ARCH_RENESAS in place of ARCH_SHMOBILE.

This is part of an ongoing process to migrate from ARCH_SHMOBILE to
ARCH_RENESAS the motivation for which being that RENESAS seems to be a more
appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs.
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Both chip->base and chip->label are correctly set by bgpio_init().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NJulien Grossholtz <julien.grossholtz@savoirfairelinux.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use list_for_each_entry to simplify the code a bit.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NGregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Move the code checking valid gpio count to cover both DT and non-DT cases.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NAlban Bedel <albeu@free.fr>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Merge branch 'devm_gpiochip' of https://github.com/ldewangan/linux-upstream into devm-gpiochip-add-data

gpio->load_gpio is optional, so use devm_gpiod_get_optional instead.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NAndrew F. Davis <afd@ti.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

ret variable can contain error values and is compared with zero.
Its type must be signed.

The problem has been detected using coccinelle script
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Make use of ARCH_RENESAS in place of ARCH_SHMOBILE.

This is part of an ongoing process to migrate from ARCH_SHMOBILE to
ARCH_RENESAS the motivation for which being that RENESAS seems to be a more
appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs.
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Both chip->base and chip->label are correctly set by bgpio_init().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NJulien Grossholtz <julien.grossholtz@savoirfairelinux.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use list_for_each_entry to simplify the code a bit.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NGregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Move the code checking valid gpio count to cover both DT and non-DT cases.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NAlban Bedel <albeu@free.fr>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

The R-Car GPIO driver handles Runtime PM for requested GPIOs only.

When using a GPIO purely as an interrupt source, no Runtime PM handling
is done, and the GPIO module's clock may not be enabled.

To fix this:
  - Add .irq_request_resources() and .irq_release_resources() callbacks
    to handle Runtime PM when an interrupt is requested,
  - Add irq_bus_lock() and sync_unlock() callbacks to handle Runtime PM
    when e.g. disabling/enabling an interrupt, or configuring the
    interrupt type.

Fixes: d5c3d846 "net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS"
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

devm_get_gpiod_from_child() tries several property suffixes to find a
GPIO descriptor. If all suffixes fail and no probe deferral has been
detected, it returns the error of the last try.

However, if any but the last try fails with a real error (e.g. -EBUSY),
this error is not propagated, and -ENOENT will be returned.
This confuses drivers that e.g. want to detect if a GPIO is already in
use.

To fix this, change the loop logic to continue on -ENOENT, which
indicates the property was not found and the next suffix should be
tried, and propagate all other detected errors.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Cc: patches@opensource.wolfsonmicro.com
Acked-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Cc: patches@opensource.wolfsonmicro.com
Acked-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Cc: patches@opensource.wolfsonmicro.com
Acked-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and clean the
error path.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>