deliverable/linux.git
8 years agogpio: spear-spics: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: spear-spics: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: sch: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: sch: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: rdc321x: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: rdc321x: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: rc5t583: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: rc5t583: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: palmas: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: palmas: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: pcf857x: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: pcf857x: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and clean the
error path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: pca953x: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: pca953x: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: octeon: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: octeon: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: mxc: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: mxc: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and clean the
error path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: mvebu: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: mvebu: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and clean the
error path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: moxart: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: moxart: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: mc9s08dz60: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: mc9s08dz60: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: lynxpoint: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: lynxpoint: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: lpc32xx: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: lpc32xx: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: lp3943: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: lp3943: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: kempld: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: kempld: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: janz-ttl: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: janz-ttl: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: iop: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: iop: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: generic: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: generic: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: ge: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: ge: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: f7188x: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: f7188x: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: ep93xx: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: ep93xx: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: dln2: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: dln2: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: da9055: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: da9055: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Support Opensource <support.opensource@diasemi.com>
8 years agogpio: da9052: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: da9052: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: cs5535: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: cs5535: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: crystalcove: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: crystalcove: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
call of gpiochip_remove() from error path.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: clps711x: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: clps711x: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: bcm-kona: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: bcm-kona: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Ray Jui <rjui@broadcom.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>
8 years agogpio: arizona: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: arizona: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: patches@opensource.wolfsonmicro.com
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
8 years agogpio: adp5588: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: adp5588: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
call for gpiochip_remove() from remove callback.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
8 years agogpio: adp5520: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: adp5520: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
call for gpiochip_remove() from error path.

Also remove the need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
8 years agogpio: adnp: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: adnp: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
call for gpiochip_remove() from error path.

Also remove the need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
8 years agogpio: 74xx-mmio: Use devm_gpiochip_add_data() for gpio registration
Laxman Dewangan [Mon, 22 Feb 2016 12:13:28 +0000 (17:43 +0530)] 
gpio: 74xx-mmio: Use devm_gpiochip_add_data() for gpio registration

Use devm_gpiochip_add_data() for GPIO registration and remove the
call for gpiochip_remove() from error path.

Also remove the need of driver callback .remove.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Alexander Shiyan <shc_work@mail.ru>
8 years agogpio: Add missing devm_gpio_ wrapper in devres.txt
Laxman Dewangan [Mon, 22 Feb 2016 09:34:08 +0000 (15:04 +0530)] 
gpio: Add missing devm_gpio_ wrapper in devres.txt

Add following missing devm wrappers in file devrs.txt under
list of managed interfaces.
  devm_gpio_request()
  devm_gpio_request_one()
  devm_gpio_free()

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: Add resource management devm_gpio_chip_{add_data,remove}
Laxman Dewangan [Mon, 22 Feb 2016 09:30:08 +0000 (15:00 +0530)] 
gpio: Add resource management devm_gpio_chip_{add_data,remove}

Add devm wrappers for the gpiochip_add_data() and gpiochip_remove().

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agogpio: Add devm_ apis for gpiochip_add_data and gpiochip_remove
Laxman Dewangan [Mon, 15 Feb 2016 11:02:09 +0000 (16:32 +0530)] 
gpio: Add devm_ apis for gpiochip_add_data and gpiochip_remove

Add device managed APIs devm_gpiochip_add_data() and
devm_gpiochip_remove() for the APIs gpiochip_add_data()
and gpiochip_remove().

This helps in reducing code in error path and sometimes
removal of .remove callback for driver unbind.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
8 years agoMerge remote-tracking branch 'linusw-gpio/for-next' into devm_gpiochip
Laxman Dewangan [Tue, 23 Feb 2016 14:07:08 +0000 (19:37 +0530)] 
Merge remote-tracking branch 'linusw-gpio/for-next' into devm_gpiochip

Base for demv_gpiochip_add_data() and devm_gpiochip_remove().

8 years agoShare upstreaming patches
ldewangan [Tue, 23 Feb 2016 14:03:35 +0000 (19:33 +0530)] 
Share upstreaming patches

Share multiple bulk changes.

8 years agoMerge branch 'devel' into for-next
Linus Walleij [Mon, 22 Feb 2016 12:47:49 +0000 (13:47 +0100)] 
Merge branch 'devel' into for-next

8 years agogpio: fixup line flags for userspace ABI
Linus Walleij [Mon, 22 Feb 2016 12:44:53 +0000 (13:44 +0100)] 
gpio: fixup line flags for userspace ABI

This fixes the wrongly indicated lines in the userspace
ABI: test for the right BITS, do not treat bit numbers as
bitmasks.

Reported-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoRevert "gpio: remove broken irq_to_gpio() interface"
Linus Walleij [Sat, 20 Feb 2016 11:53:31 +0000 (12:53 +0100)] 
Revert "gpio: remove broken irq_to_gpio() interface"

This reverts commit ee2204a37957daed80418ea8ffc4f5c3146fb8e7.

8 years agogpiolib: fix crash when gpiochip removed
Bamvor Jian Zhang [Sat, 20 Feb 2016 05:13:19 +0000 (13:13 +0800)] 
gpiolib: fix crash when gpiochip removed

Commit cb464a88e1ed ("gpio: make the gpiochip a real device") call
gpiochip_sysfs_unregister after the gpiochip is empty. It lead to the
following crash:

[  163.503994] Unable to handle kernel NULL pointer dereference at virtual address 0000007c
[...]
[  163.525394] [<ffffffc0003719a0>] gpiochip_sysfs_unregister+0x44/0xa4
[  163.525611] [<ffffffc00036f6a0>] gpiochip_remove+0x24/0x154
[  163.525861] [<ffffffbffc00f0a4>] mockup_gpio_remove+0x38/0x64 [gpio_mockup]
[  163.526101] [<ffffffc00042b4b4>] platform_drv_remove+0x24/0x64
[  163.526313] [<ffffffc000429cc8>] __device_release_driver+0x7c/0xfc
[  163.526525] [<ffffffc000429e54>] driver_detach+0xbc/0xc0
[  163.526700] [<ffffffc000429014>] bus_remove_driver+0x58/0xac
[  163.526883] [<ffffffc00042a4cc>] driver_unregister+0x2c/0x4c
[  163.527067] [<ffffffc00042b5c0>] platform_driver_unregister+0x10/0x18
[  163.527284] [<ffffffbffc00f340>] mock_device_exit+0x10/0x38 [gpio_mockup]
[  163.527593] [<ffffffc00011cefc>] SyS_delete_module+0x1b8/0x1fc
[  163.527799] [<ffffffc000085d8c>] __sys_trace_return+0x0/0x4
[  163.528049] Code: 940d74b4 f9019abf aa1303e0 940d7439 (7940fac0)
[  163.536273] ---[ end trace 3d1329be504af609 ]---

This patch fix this by changing the code back.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: pisosr: add missing unlock
Sudip Mukherjee [Fri, 19 Feb 2016 09:23:00 +0000 (14:53 +0530)] 
gpio: pisosr: add missing unlock

If spi_read() fails then we just returned but we missed unlocking the
mutex.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: X-Gene standby GPIO controller DTS binding
Quan Nguyen [Wed, 17 Feb 2016 13:15:08 +0000 (20:15 +0700)] 
gpio: X-Gene standby GPIO controller DTS binding

Update description for X-Gene standby GPIO controller DTS binding to
support GPIO line configuration as input, output or external IRQ pin.

Signed-off-by: Y Vo <yvo@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: xgene: Enable X-Gene standby GPIO as interrupt controller
Quan Nguyen [Wed, 17 Feb 2016 13:15:07 +0000 (20:15 +0700)] 
gpio: xgene: Enable X-Gene standby GPIO as interrupt controller

Enable X-Gene standby GPIO controller as interrupt controller to provide
its own resources. This avoids ambiguity where GIC interrupt resource is
use as X-Gene standby GPIO interrupt resource in user driver.

Signed-off-by: Y Vo <yvo@apm.com>
Signed-off-by: Quan Nguyen <qnguyen@apm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: txx9: rbtx4938: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:43:48 +0000 (14:43 +0100)] 
MIPS: txx9: rbtx4938: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: txx9: iocled: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 13:40:40 +0000 (14:40 +0100)] 
MIPS: txx9: iocled: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: rb532: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 13:37:16 +0000 (14:37 +0100)] 
MIPS: rb532: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: txx9: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:33:54 +0000 (14:33 +0100)] 
MIPS: txx9: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: jz4740: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 13:28:45 +0000 (14:28 +0100)] 
MIPS: jz4740: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: bcm63xx: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:22:32 +0000 (14:22 +0100)] 
MIPS: bcm63xx: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: ar7: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 13:15:03 +0000 (14:15 +0100)] 
MIPS: ar7: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: linux-mips@linux-mips.org
Cc: Alban Bedel <albeu@free.fr>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: alchemy: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:08:42 +0000 (14:08 +0100)] 
MIPS: alchemy: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: linux-mips@linux-mips.org
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agom68k: gpio: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:03:48 +0000 (14:03 +0100)] 
m68k: gpio: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoblackfin: extgpio: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 13:01:01 +0000 (14:01 +0100)] 
blackfin: extgpio: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: Sonic Zhang <sonic.zhang@analog.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoblackfin: gpio: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 12:54:10 +0000 (13:54 +0100)] 
blackfin: gpio: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: Sonic Zhang <sonic.zhang@analog.com>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: plat-orion: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 12:28:31 +0000 (13:28 +0100)] 
ARM: plat-orion: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: w90x900: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 10:24:57 +0000 (11:24 +0100)] 
ARM: w90x900: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: simpad: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 10:20:44 +0000 (11:20 +0100)] 
ARM: simpad: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: s3c24xx: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 10:16:53 +0000 (11:16 +0100)] 
ARM: s3c24xx: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: ixp4xx: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 10:08:52 +0000 (11:08 +0100)] 
ARM: ixp4xx: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: imx: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 10:03:12 +0000 (11:03 +0100)] 
ARM: imx: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: gemini: switch to gpiochip_add_data()
Linus Walleij [Tue, 8 Dec 2015 09:56:49 +0000 (10:56 +0100)] 
ARM: gemini: switch to gpiochip_add_data()

We're planning to remove the gpiochip_add() function to swith
to gpiochip_add_data() with NULL for data argument.

Cc: arm@kernel.org
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoARM: scoop: use gpiochip data pointer
Linus Walleij [Tue, 8 Dec 2015 09:51:43 +0000 (10:51 +0100)] 
ARM: scoop: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: arm@kernel.org
Cc: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agopinctrl: cygnus-gpio: use gpiochip data pointer
Linus Walleij [Mon, 7 Dec 2015 22:48:26 +0000 (23:48 +0100)] 
pinctrl: cygnus-gpio: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Jon Mason <jonmason@broadcom.com>
Acked-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: add userspace ABI for GPIO line information
Linus Walleij [Fri, 12 Feb 2016 21:25:22 +0000 (22:25 +0100)] 
gpio: add userspace ABI for GPIO line information

This adds a GPIO line ABI for getting name, label and a few select
flags from the kernel.

This hides the kernel internals and only tells userspace what it
may need to know: the different in-kernel consumers are masked
behind the flag "kernel" and that is all userspace needs to know.

However electric characteristics like active low, open drain etc
are reflected to userspace, as this is important information.

We provide information on all lines on all chips, later on we will
likely add a flag for the chardev consumer so we can filter and
display only the lines userspace actually uses in e.g. lsgpio,
but then we first need an ABI for userspace to grab and use
(get/set/select direction) a GPIO line.

Sample output from "lsgpio" on ux500:

GPIO chip: gpiochip7, "8011e000.gpio", 32 GPIO lines
        line 0: unnamed unlabeled
        line 1: unnamed unlabeled
(...)
        line 25: unnamed "SFH7741 Proximity Sensor" [kernel output open-drain]
        line 26: unnamed unlabeled
(...)

Tested-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: store reflect the label to userspace
Linus Walleij [Fri, 12 Feb 2016 13:48:23 +0000 (14:48 +0100)] 
gpio: store reflect the label to userspace

The gpio_chip label is useful for userspace to understand what
kind of GPIO chip it is dealing with. Let's store a copy of this
label in the gpio_device, add it to the struct passed to userspace
for GPIO_GET_CHIPINFO_IOCTL and modify lsgpio to show it.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: tps65218: remove unused #include
Linus Walleij [Fri, 19 Feb 2016 08:22:41 +0000 (09:22 +0100)] 
gpio: tps65218: remove unused #include

Just as it says: after adding the proper interfaces to gpiolib,
this is no longer needed.

Suggested-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: allow setting ARCH_NR_GPIOS from Kconfig
Arnd Bergmann [Tue, 16 Feb 2016 15:40:38 +0000 (16:40 +0100)] 
gpio: allow setting ARCH_NR_GPIOS from Kconfig

The ARM version of asm/gpio.h basically just contains the same definitions
as the gpiolib version, with the exception of ARCH_NR_GPIOS.

This adds the option for overriding the constant through Kconfig to
the architecture-independent header, so we can remove the ARM specific
file later.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: ks8695: remove irq_to_gpio function
Arnd Bergmann [Tue, 16 Feb 2016 15:40:36 +0000 (16:40 +0100)] 
gpio: ks8695: remove irq_to_gpio function

The ks8695 gpio driver has its own copy of the irq_to_gpio()
function. This is completely unused in the mainline kernel
after we converted all remaining users several years ago,
so we can remove the definition as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: remove broken irq_to_gpio() interface
Arnd Bergmann [Tue, 16 Feb 2016 15:40:35 +0000 (16:40 +0100)] 
gpio: remove broken irq_to_gpio() interface

gpiolib has removed the irq_to_gpio() API several years ago,
but the global header still provided a non-working stub.

To prevent new users of this broken function from showing
up, let's remove the stubs as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agoMIPS: jz4740: Fix surviving instance of irq_to_gpio()
Ralf Baechle [Tue, 16 Feb 2016 11:29:46 +0000 (12:29 +0100)] 
MIPS: jz4740: Fix surviving instance of irq_to_gpio()

This is fallout from commit 832f5dacfa0b ("MIPS: Remove all the uses of
custom gpio.h").

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Suggested-by: Lars-Peter Clausen <lars@metafoo.de>
8 years agogpio: use kzalloc to allocate gpio_device
Josh Cartwright [Wed, 17 Feb 2016 22:44:15 +0000 (16:44 -0600)] 
gpio: use kzalloc to allocate gpio_device

The use of kmalloc() to allocate the gpio_device leaves the contained struct
device object in an unknown state.  Calling dev_set_name() on a struct device
of unknown state can trigger the free() of an invalid pointer, as seen in the
following backtrace (collected by Tony Lindgren):

  kfree
  kobject_set_name_vargs
  dev_set_name
  gpiochip_add_data
  omap_gpio_probe
  platform_drv_probe
  ...

Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reported-by: Michael Welling <mwelling@ieee.org>
Reported-by: Tony Lindgren <tony@atomide.com>
Tested-by: Michael Welling <mwelling@ieee.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Josh Cartwright <joshc@ni.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio-mcp23s08: correctly handling failed allocation
Insu Yun [Tue, 16 Feb 2016 02:19:57 +0000 (21:19 -0500)] 
gpio-mcp23s08: correctly handling failed allocation

Since devm_kzalloc can be failed in memory pressure,
it needs to check and return -ENOMEM

Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: tps65218: Make tps65218_gpio_output set proper output level
Axel Lin [Mon, 15 Feb 2016 12:10:40 +0000 (20:10 +0800)] 
gpio: tps65218: Make tps65218_gpio_output set proper output level

The .direction_output callback should set proper output level.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: tpic2810: Make tpic2810_direction_output set proper output level
Axel Lin [Mon, 15 Feb 2016 12:09:14 +0000 (20:09 +0800)] 
gpio: tpic2810: Make tpic2810_direction_output set proper output level

The .direction_output callback should set proper output level.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: create an API to detect open drain/source on lines
Linus Walleij [Tue, 16 Feb 2016 14:41:42 +0000 (15:41 +0100)] 
gpio: create an API to detect open drain/source on lines

My left hand merges code to privatize the descriptor handling
while my right hand merges drivers that poke around and
disrespect with the same gpiolib internals.

So let's expose the proper APIs for drivers to ask the gpiolib
core if a line is marked as open drain or open source and
get some order around things so this driver compiles again.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: davinci: Fix possible NULL pointer deference
Nicholas Krause [Wed, 3 Feb 2016 00:17:59 +0000 (19:17 -0500)] 
gpio: davinci: Fix possible NULL pointer deference

This fixes a possible NULL pointer deference in the function,
davinci_gpio_probe due to the function, gpio2regs being able
to return a NULL pointer if it rans to get the registers for
the gpio devices on a davinci board. Furthermore if this does
arise return -ENXIO to signal callers that this case has arisen
and avoiding setting the regs or other pointer values on the

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: Remove unused asm/gpio.h files
Bjorn Helgaas [Tue, 2 Feb 2016 19:53:30 +0000 (13:53 -0600)] 
gpio: Remove unused asm/gpio.h files

asm/gpio.h is included only by linux/gpio.h, and then only when the arch
selects ARCH_HAVE_CUSTOM_GPIO_H.  Only the following arches select it: arm
avr32 blackfin m68k (COLDFIRE only) sh unicore32.

Remove the unused asm/gpio.h files for the arches that do not select
ARCH_HAVE_CUSTOM_GPIO_H.

This is a follow-on to 7563bbf89d06 ("gpiolib/arches: Centralise
bolierplate asm/gpio.h").

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: Include linux/gpio.h instead of asm/gpio.h
Bjorn Helgaas [Tue, 2 Feb 2016 19:53:23 +0000 (13:53 -0600)] 
gpio: Include linux/gpio.h instead of asm/gpio.h

Most arches have an asm/gpio.h that merely includes linux/gpio.h.  The
others select ARCH_HAVE_CUSTOM_GPIO_H, and when that's selected,
linux/gpio.h includes asm/gpio.h.

Therefore, code should include linux/gpio.h instead of including asm/gpio.h
directly.

Remove includes of asm/gpio.h, adding an include of linux/gpio.h when
necessary.

This is a follow-on to 7563bbf89d06 ("gpiolib/arches: Centralise
bolierplate asm/gpio.h").

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: TS-4800: remove useless bgpio_init flags
Julien Grossholtz [Wed, 10 Feb 2016 17:20:34 +0000 (12:20 -0500)] 
gpio: TS-4800: remove useless bgpio_init flags

No flags are required for bgpio_init in the TS-4800 gpio driver. This
patch set zero instead. The driver will have the same behaviour since
the & operator between the flags already resulted to zero.

Fixes: 5041e791440a ("gpio: add TS-4800 fpga GPIO support")
Signed-off-by: Julien Grossholtz <julien.grossholtz@savoirfairelinux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: move the subdriver data pointer into gpio_device
Linus Walleij [Thu, 11 Feb 2016 10:37:48 +0000 (11:37 +0100)] 
gpio: move the subdriver data pointer into gpio_device

We move to manage this pointer under gpiolib control rather than
leave it in the subdevice's gpio_chip. We can not NULL it after
gpiochip_remove so at to keep things tight.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: move the pin ranges into gpio_device
Linus Walleij [Thu, 11 Feb 2016 10:03:06 +0000 (11:03 +0100)] 
gpio: move the pin ranges into gpio_device

Instead of keeping this reference to the pin ranges in the
client driver-supplied gpio_chip, move it to the internal
gpio_device as the drivers have no need to inspect this.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agopinctrl: sirf/atlas7: stop poking around in GPIO internals
Linus Walleij [Fri, 12 Feb 2016 08:22:11 +0000 (09:22 +0100)] 
pinctrl: sirf/atlas7: stop poking around in GPIO internals

This code is poking around in the gpio_chip:s internal structures
to achieve some kind of pin to GPIO mappings.

- It is wrong to poke around in these structs and the pinctrl
  maintainer was stupid to let it pass unnoticed, mea culpa.

- The right interface to use is gpiochip_add_pin_range()

- The code appears unused: the pin control part of the driver
  is not adding any ranges, so we're iterating over an empty
  list. Maybe it is poking around in some other pin controllers
  GPIO ranges, and that's just totally wrong, again use
  gpiochip_add_pin_range() and specify the right pin
  controller.

Cc: Barry Song <baohua@kernel.org>
Cc: Guoying Zhang <Guoying.Zhang@csr.com>
Cc: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: ws16c48: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:17:50 +0000 (15:17 -0500)] 
gpio: ws16c48: Use devm_request_region

By the time request_region is called in the WinSystems WS16C48 GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: sch311x: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:17:40 +0000 (15:17 -0500)] 
gpio: sch311x: Use devm_request_region

By the time request_region is called in the SMSC SCH311x GPIO driver, a
corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: ich: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:17:27 +0000 (15:17 -0500)] 
gpio: ich: Use devm_request_region

By the time request_region is called in the Intel ICH series GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Cc: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: amd8111: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:17:13 +0000 (15:17 -0500)] 
gpio: amd8111: Use devm_request_region

By the time request_region is called in the AMD 8111 GPIO driver, a
corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: 104-idio-16: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:17:02 +0000 (15:17 -0500)] 
gpio: 104-idio-16: Use devm_request_region

By the time request_region is called in the ACCES 104-IDIO-16 GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: 104-idi-48: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:15:22 +0000 (15:15 -0500)] 
gpio: 104-idi-48: Use devm_request_region

By the time request_region is called in the ACCES 104-IDI-48 GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: 104-dio-48e: Use devm_request_region
William Breathitt Gray [Wed, 3 Feb 2016 20:15:21 +0000 (15:15 -0500)] 
gpio: 104-dio-48e: Use devm_request_region

By the time request_region is called in the ACCES 104-DIO-48E GPIO
driver, a corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: misc: Pass correct license string to MODULE_LICENSE
William Breathitt Gray [Mon, 1 Feb 2016 23:51:49 +0000 (18:51 -0500)] 
gpio: misc: Pass correct license string to MODULE_LICENSE

The GPIO driver copyright boilerplate lacks the "or
later" verbiage regarding GPL compliant distribution. The MODULE_LICENSE
string should reflect the actual copyright license terms used.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: reference count the gpio device for each desc
Linus Walleij [Thu, 11 Feb 2016 09:28:44 +0000 (10:28 +0100)] 
gpio: reference count the gpio device for each desc

Every time a descriptor is retrieved from the gpiolib, we issue
module_get() to reference count the module supplying the GPIOs.
We also need to call device_get() and device_put() as we also
reference the backing gpio_device when doing this.

Since the sysfs GPIO interface is using gpiod_get() this will
also reference count the sysfs requests until all GPIOs are
unexported.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: reflect base and ngpio into gpio_device
Linus Walleij [Wed, 10 Feb 2016 09:57:36 +0000 (10:57 +0100)] 
gpio: reflect base and ngpio into gpio_device

Some information about the GPIO chip need to stay around also
after the gpio_chip has been removed and only the gpio_device
persist. The base and ngpio are such things, for example we
don't want a new chip arriving to overlap the number space
of a dangling gpio_device, and the chardev may still query
the device for the number of lines etc.

Note that the code that assigns base and insert gpio_device
into the global list no longer check for a missing gpio_chip:
we respect the number space allocated by any other gpio_device.

As a consequence of the gdev being referenced directly from
the gpio_desc, we need to verify it differently from all
in-kernel API calls that fall through to direct queries to
the gpio_chip vtable: we first check that desc is !NULL, then
that desc->gdev is !NULL, then, if desc->gdev->chip is NULL,
we *BAIL OUT* without any error, so as to manage the case
where operations are requested on a device that is gone.

These checks were non-uniform and partly missing in the past:
so to simplify: create the macros VALIDATE_DESC() that will
return -EINVAL if the desc or desc->gdev is missing and just
0 if the chip is gone, and conversely VALIDATE_DESC_VOID()
for the case where the function does not return an error.
By using these macros, we get warning messages about missing
gdev with reference to the right function in the kernel log.

Despite the macro business this simplifies the code and make
it more readable than if we copy/paste the same descriptor
checking code into all code ABI call sites (IMHO).

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio/pinctrl: sunxi: stop poking around in private vars
Linus Walleij [Thu, 11 Feb 2016 19:16:45 +0000 (20:16 +0100)] 
gpio/pinctrl: sunxi: stop poking around in private vars

This kind of hacks disturbs the refactoring of the gpiolib.

The descriptor table belongs to the gpiolib, if we want to know
something about something in it, use or define the proper accessor
functions. Let's add this gpiochip_lins_is_irq() to do what the
sunxi driver is trying at so we can privatize the descriptors
properly.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: move descriptors into gpio_device
Linus Walleij [Tue, 9 Feb 2016 12:51:59 +0000 (13:51 +0100)] 
gpio: move descriptors into gpio_device

We need gpio_device to hold the descriptors so that they can
be lifecycled with the struct gpio_device held from userspace.
Move the descriptor array into gpio_device. Also rename it from
"desc" (singularis) to "descs" (pluralis) to reflect the fact
that it is an array.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: move sysfs mock device to the gpio_device
Linus Walleij [Tue, 9 Feb 2016 12:21:06 +0000 (13:21 +0100)] 
gpio: move sysfs mock device to the gpio_device

Since gpio_device is the struct that survives if the backing
gpio_chip is removed, move the sysfs mock device to this state
container so it becomes part of the dangling state of the
GPIO device on removal.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: remember to finally free gpio_device
Linus Walleij [Tue, 9 Feb 2016 13:27:42 +0000 (14:27 +0100)] 
gpio: remember to finally free gpio_device

When the device core reference count for the device goes to
0 and it calls .release() we free resources and so can also
finally free up the GPIO state container, struct gpio_device.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
8 years agogpio: add tps65218 gpio
Nicolas Saenz Julienne [Sat, 30 Jan 2016 17:06:44 +0000 (17:06 +0000)] 
gpio: add tps65218 gpio

Driver for the GPIO block found in ti's tps65218 pmics.

The device has two GPIOs and one GPO pin which can be configured as follows:
GPIO1:
-general-purpose, open-drain output controlled by GPO1 user bit and/or
 sequencer
-DDR3 reset input signal from SOC. Signal is either latched or
 passed-trough to GPO2 pin. See below for details.
GPO2:
-general-purpose output controlled by GPO2 user bit
-DDR3 reset output signal. Signal is controlled by GPIO1 and PGOOD.
 See below for details.
-Output buffer can be configured as open-drain or push-pull.
GPIO3:
-general-purpose, open-drain output controlled by GPO3 user bit and/or
 sequencer
-reset input-signal for DCDC1 and DCDC2.

The input configurations are not meant to be used by the user so the driver
only offers GPOs.

v2: Added request routine that evaluates the fw config flags and removed module
    owner
v3: Added .direction_input() routine, and took care of all Linus Walleij
suggestions (clamp to bool, use proper include)

Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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