Tomasz Figa f6a8249f9e pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs ... Currently after configuring a GPIO pin as an interrupt related pinmux registers are changed, but there is no protection from calling gpio_direction_*() in a badly written driver, which would cause the same pinmux register to be reconfigured for regular input/output and this disabling interrupt capability of the pin. This patch addresses this issue by moving pinmux reconfiguration to .irq_{request,release}_resources() callback of irq_chip and calling gpio_lock_as_irq() helper to prevent reconfiguration of pin direction. Setting up a GPIO interrupt on Samsung SoCs is a two-step operation - in addition to trigger configuration in a dedicated register, the pinmux must be also reconfigured to GPIO interrupt, which is a different function than normal GPIO input, although I/O-wise they both behave in the same way and gpio_get_value() can be used on a pin configured as IRQ as well. Such design implies subtleties such as gpio_direction_input() not having to fail if a pin is already configured as an interrupt nor change the configuration to normal input. But the FLAG_USED_AS_IRQ set in gpiolib by gpio_lock_as_irq() is only used to check that gpio_direction_output() is not called, it's not used to prevent gpio_direction_input() to be called. So this is not a complete solution for Samsung SoCs but it's definitely a move in the right direction. Signed-off-by: Tomasz Figa <t.figa@samsung.com> [javier: use request resources instead of startup and expand commit message] Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>		2014-08-21 07:24:29 -05:00
..
berlin	pinctrl: berlin: fix an error code in berlin_pinctrl_probe()	2014-07-05 01:15:35 +02:00
mvebu	pinctrl: mvebu: new driver for Orion platforms	2014-04-24 15:09:35 +02:00
nomadik	pinctrl: abx500: remove useless check	2014-08-17 09:15:44 -05:00
qcom	pinctrl: msm: drop negativity check on unsigned value	2014-07-23 15:24:40 +02:00
samsung	pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs	2014-08-21 07:24:29 -05:00
sh-pfc	sh-pfc: r8a7791: fix CAN pin groups	2014-08-17 09:15:43 -05:00
sirf	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
spear	pinctrl: remove all usage of gpio_remove ret val in driver/pinctl	2014-07-22 16:34:12 +02:00
sunxi	This is the bulk pin control changes for the v3.17 merge	2014-08-07 17:20:53 -07:00
vt8500	pinctrl: remove all usage of gpio_remove ret val in driver/pinctl	2014-07-22 16:34:12 +02:00
core.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
core.h	pinctrl: move subsystem mutex to pinctrl_dev struct	2013-04-26 17:01:35 +02:00
devicetree.c	pinctrl: Quiet logging about missing DT nodes when not using DT	2014-02-24 10:44:54 +01:00
devicetree.h	pinctrl: core device tree mapping table parsing support	2012-04-18 13:53:10 +02:00
Kconfig	ARM: SoC device-tree changes for 3.17	2014-08-08 11:16:58 -07:00
Makefile	ARM: SoC device-tree changes for 3.17	2014-08-08 11:16:58 -07:00
pinconf-generic.c	pinctrl: Enable "power-source" to be extracted from DT files	2014-05-28 10:16:35 +02:00
pinconf.c	pinctrl: pinconf: remove warning: unused variable 'ops'	2013-12-13 13:55:15 +01:00
pinconf.h	pinctrl: add function to parse generic pinconfig properties from a dt node	2013-06-16 11:57:32 +02:00
pinctrl-adi2-bf54x.c	pinctrl: pinctrl-adi: combine multiple groups of one function together	2014-02-25 10:49:13 +01:00
pinctrl-adi2-bf60x.c	pinctrl: pinctrl-adi: combine multiple groups of one function together	2014-02-25 10:49:13 +01:00
pinctrl-adi2.c	pinctrl: remove all usage of gpio_remove ret val in driver/pinctl	2014-07-22 16:34:12 +02:00
pinctrl-adi2.h	pinctrl: pinctrl-adi: combine multiple groups of one function together	2014-02-25 10:49:13 +01:00
pinctrl-as3722.c	pinctrl: remove all usage of gpio_remove ret val in driver/pinctl	2014-07-22 16:34:12 +02:00
pinctrl-at91.c	pinctrl: pinctrl-at91.c: fix decimal printf format specifiers prefixed with 0x	2014-08-17 09:15:44 -05:00
pinctrl-baytrail.c	pinctrl: baytrail: Convert to use gpiolib irqchip	2014-07-28 12:21:00 +02:00
pinctrl-bcm281xx.c	pinctrl: bcm281xx: Staticize bcm281xx_pinctrl_probe	2014-07-11 14:08:31 +02:00
pinctrl-bcm2835.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-coh901.c	pinctrl: remove all usage of gpio_remove ret val in driver/pinctl	2014-07-22 16:34:12 +02:00
pinctrl-coh901.h	pinctrl: support pinconfig on the U300	2012-03-12 22:49:03 +01:00
pinctrl-falcon.c	pinctrl: Pass all configs to driver on pin_config_set()	2013-08-28 13:34:41 +02:00
pinctrl-imx1-core.c	pinctrl: pinctrl-imx1-core.c: Cleaning up if unsigned is less than zero	2014-07-11 14:08:33 +02:00
pinctrl-imx1.c	pinctrl: Add i.MX1 pincontrol driver	2014-07-11 14:08:25 +02:00
pinctrl-imx1.h	pinctrl: imx1 core driver	2013-10-29 06:54:37 -07:00
pinctrl-imx6dl.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx6q.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx6sl.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx6sx.c	pinctrl: add pinctrl driver for imx6sx	2014-05-27 11:24:28 +02:00
pinctrl-imx23.c	Drivers: pinctrl: remove __dev* attributes.	2013-01-03 15:57:02 -08:00
pinctrl-imx25.c	pinctrl: pinctrl-imx: add imx25 pinctrl driver	2013-11-25 09:08:30 +01:00
pinctrl-imx27.c	pinctrl: i.MX27: Remove nonexistent pad definitions	2014-07-11 14:08:26 +02:00
pinctrl-imx28.c	Drivers: pinctrl: remove __dev* attributes.	2013-01-03 15:57:02 -08:00
pinctrl-imx35.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx50.c	pinctrl: imx50: add pinctrl support code for the IMX50 SoC	2013-11-06 10:06:59 +01:00
pinctrl-imx51.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx53.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-imx.c	pinctrl: pinctrl-imx.c: Cleaning up if unsigned is less than zero	2014-07-11 14:08:32 +02:00
pinctrl-imx.h	pinctrl: imx: Use struct type for pins	2013-08-16 14:43:56 +02:00
pinctrl-lantiq.c	pinctrl/lantiq: Free mapping configs for both pin and groups	2013-05-15 13:28:46 +02:00
pinctrl-lantiq.h	pinctrl: lantiq: Fix header file include guard	2014-04-22 08:41:35 +02:00
pinctrl-mxs.c	pinctrl: Pass all configs to driver on pin_config_set()	2013-08-28 13:34:41 +02:00
pinctrl-mxs.h	pinctrl: add pinctrl-mxs support	2012-05-02 01:18:27 +02:00
pinctrl-palmas.c	pinctrl: palmas: remove pin config BIAS_PULL_PIN_DEFAULT support	2013-10-08 13:27:27 +02:00
pinctrl-rockchip.c	pinctrl: rockchip: fix rk3288 gpio0 configuration	2014-08-17 09:15:43 -05:00
pinctrl-single.c	pinctrl: pinctrl-single.c: Cleaning up wrong format string usage	2014-07-11 14:08:35 +02:00
pinctrl-st.c	This is the bulk pin control changes for the v3.17 merge	2014-08-07 17:20:53 -07:00
pinctrl-tb10x.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-tegra20.c	pinctrl: tegra: remove fsafe from data tables	2014-04-22 16:50:24 +02:00
pinctrl-tegra30.c	pinctrl: tegra: remove fsafe from data tables	2014-04-22 16:50:24 +02:00
pinctrl-tegra114.c	pinctrl: tegra: remove fsafe from data tables	2014-04-22 16:50:24 +02:00
pinctrl-tegra124.c	pinctrl: tegra: remove fsafe from data tables	2014-04-22 16:50:24 +02:00
pinctrl-tegra-xusb.c	pinctrl: tegra-xusb: testing wrong variable in probe()	2014-08-17 09:15:44 -05:00
pinctrl-tegra.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-tegra.h	pinctrl: tegra: add missing kerneldoc	2014-04-22 16:55:41 +02:00
pinctrl-tz1090-pdc.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-tz1090.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-u300.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinctrl-utils.c	pinctrl: utils: include export.h to avoid warnings	2013-08-28 15:50:33 +02:00
pinctrl-utils.h	pinctrl: add utility functions for add map/configs	2013-08-14 21:00:41 +02:00
pinctrl-vf610.c	pinctrl: remove redundant of_match_ptr	2013-10-08 10:02:25 +02:00
pinctrl-xway.c	pinctrl/lantiq: fix typo	2014-01-08 10:13:38 +01:00
pinmux.c	pinctrl: avoid duplicated calling enable_pinmux_setting for a pin	2014-07-11 14:08:26 +02:00
pinmux.h	pinctrl: ifdef CONFIG_DEBUG_FS cleanup	2012-04-18 13:53:12 +02:00