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linux/drivers/gpio
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Mika Westerberg f35bbf61ab gpio / ACPI: Return -EPROBE_DEFER if the gpiochip was not found 
If a driver requests a GPIO described in its _CRS but the GPIO host
controller (gpiochip) driver providing the GPIO has not been loaded yet
acpi_get_gpiod() returns -ENODEV which causes the calling driver to fail.

If the gpiochip driver is loaded afterwards the driver requesting the GPIO
will not notice this.

Better approach is to return -EPROBE_DEFER in such case. Then when the
gpiochip driver appears the driver requesting the GPIO will be probed
again. This also aligns ACPI GPIO lookup code closer to DT as it does
pretty much the same when no gpiochip driver was found.

Reported-by: Tobias Diedrich <tobiasdiedrich@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Tobias Diedrich <ranma+kernel@tdiedrich.de>
Reviewed-by: Amos Kong <kongjianjun@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-11 10:17:32 +02:00
..
devres.c
gpio: fix constconst in devres
2015-03-17 17:45:59 +01:00
gpio-74x164.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-74xx-mmio.c
GPIO: Add driver for 74xx-ICs with MMIO access
2014-10-21 10:48:04 +02:00
gpio-adnp.c
gpio: adnp: switch to use irqchip helpers
2014-09-02 10:44:01 +02:00
gpio-adp5520.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-adp5588.c
gpio: removing kfree remove functionality
2015-04-08 16:54:01 +02:00
gpio-altera.c
altera_gpio_probe() can be static
2015-03-27 09:28:40 +01:00
gpio-amd8111.c
gpio-amd8111: add release_region on ioport_map failure
2015-01-19 09:48:45 +01:00
gpio-arizona.c
This is the bulk of GPIO changes for the v4.1 development
2015-04-18 08:22:10 -04:00
gpio-bcm-kona.c
gpio: bcm-kona: Implement get_direction callback
2015-04-27 15:30:00 +02:00
gpio-brcmstb.c
gpio: Add GPIO support for Broadcom STB SoCs
2015-06-02 15:36:22 +02:00
gpio-bt8xx.c
gpio: bt8xx: fix release of managed resources
2014-08-29 14:31:43 +02:00
gpio-clps711x.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-crystalcove.c
gpio: crystalcove: set IRQCHIP_SKIP_SET_WAKE for the irqchip
2015-06-02 11:22:07 +02:00
gpio-cs5535.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
gpio-da9052.c
gpio: use (!foo) instead of (foo == NULL)
2015-04-08 09:54:21 +02:00
gpio-da9055.c
gpio: use (!foo) instead of (foo == NULL)
2015-04-08 09:54:21 +02:00
gpio-davinci.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
gpio-dln2.c
gpio: dln2: fix build breakage
2015-05-13 10:02:12 +02:00
gpio-dwapb.c
gpio: dwapb: Convert to use resource managed APIs
2015-01-15 17:23:21 +01:00
gpio-em.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
gpio-ep93xx.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-etraxfs.c
gpio: add ETRAXFS GPIO driver
2015-06-10 09:11:10 +02:00
gpio-f7188x.c
gpio: f7188x: add GPIO support for F71869A
2015-03-17 17:57:37 +01:00
gpio-ge.c
gpio: ge: Convert to use devm_kstrdup
2015-01-29 10:33:15 +01:00
gpio-generic.c
gpio: gpio-generic: add flag to read out output value from reg_set
2015-05-11 11:49:02 +02:00
gpio-grgpio.c
Linux 3.19-rc5
2015-01-20 11:03:07 +01:00
gpio-ich.c
gpio: ich: Implement get_direction function
2015-04-08 09:54:27 +02:00
gpio-intel-mid.c
gpio: intel-mid: switch to using gpiolib irqchip helpers
2014-06-19 09:31:16 +02:00
gpio-iop.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-it8761e.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-janz-ttl.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-kempld.c
gpio: use (!foo) instead of (foo == NULL)
2015-04-08 09:54:21 +02:00
gpio-ks8695.c
gpio: ks8695: fix 'else should follow close brace '}''
2014-10-02 16:07:00 +02:00
gpio-loongson.c
gpio: loongson: Add Loongson-3A/3B GPIO driver support
2015-04-08 09:53:42 +02:00
gpio-lp3943.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-lpc18xx.c
gpio: add lpc18xx gpio driver
2015-05-05 17:50:07 +02:00
gpio-lpc32xx.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-lynxpoint.c
Drivers: gpio: Fix spelling errors
2015-05-19 16:52:30 +02:00
gpio-max730x.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-max732x.c
gpio: max732x: Fix irq-events handler
2015-05-06 15:08:54 +02:00
gpio-max7300.c
gpio: max7300: remove 'ret' variable
2015-04-08 09:54:10 +02:00
gpio-max7301.c
gpio: max7301: Reverting "Do not force SPI speed when using OF Platform"
2013-08-23 19:44:28 +02:00
gpio-mb86s7x.c
gpio: mb86s70: Return error if requesting an already assigned gpio
2015-03-02 15:35:41 +01:00
gpio-mc9s08dz60.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-mc33880.c
gpio: use (!foo) instead of (foo == NULL)
2015-04-08 09:54:21 +02:00
gpio-mcp23s08.c
gpio: removing kfree remove functionality
2015-04-08 16:54:01 +02:00
gpio-ml-ioh.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-mm-lantiq.c
gpio: gpio-mm-lantiq: Use of_mm_gpiochip_remove
2015-01-20 11:18:51 +01:00
gpio-moxart.c
gpio: moxart: get value of output gpio from generic driver
2015-05-11 11:51:29 +02:00
gpio-mpc8xxx.c
gpio: mpc8xxx: remove __initdata annotation for mpc8xxx_gpio_ids[]
2015-03-05 10:51:35 +01:00
gpio-mpc5200.c
gpio: mpc5200: Use of_mm_gpiochip_remove
2015-01-20 11:18:28 +01:00
gpio-msic.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-msm-v2.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-mvebu.c
gpio: mvebu: Fix mask/unmask managment per irq chip type
2015-04-08 16:35:07 +02:00
gpio-mxc.c
gpio: Constify platform_device_id
2015-05-12 09:41:28 +02:00
gpio-mxs.c
gpio: Constify platform_device_id
2015-05-12 09:41:28 +02:00
gpio-octeon.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-omap.c
gpio: omap: rework omap_gpio_irq_startup to handle current pin state properly
2015-06-01 16:53:54 +02:00
gpio-palmas.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-pca953x.c
gpio: Prevent an integer overflow in the pca953x driver
2015-06-01 16:53:55 +02:00
gpio-pcf857x.c
gpio: pcf857x: Check for irq_set_irq_wake() failures
2015-06-01 16:55:25 +02:00
gpio-pch.c
gpio: pch: Build context save/restore only for PM
2014-10-02 16:07:00 +02:00
gpio-pl061.c
gpio: pl061: hook request if gpio-ranges avaiable
2014-12-03 14:44:23 +01:00
gpio-pxa.c
gpio: pxa: simplify BANK_OFF macro offset calculation
2015-03-09 14:41:12 +01:00
gpio-rc5t583.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-rcar.c
gpio: rcar: Check for irq_set_irq_wake() failures
2015-06-01 15:10:09 +02:00
gpio-rdc321x.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-sa1100.c
ARM: 8281/1: sa1100: move GPIO-related IRQ code to gpio driver
2015-01-29 15:24:49 +00:00
gpio-samsung.c
gpio: samsung: Remove remaining check for CONFIG_S5P_GPIO_DRVSTR
2014-09-23 17:51:39 +02:00
gpio-sch311x.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-sch.c
Revert "gpio: sch: use uapi/linux/pci_ids.h directly"
2015-04-10 11:35:45 +02:00
gpio-sodaville.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-spear-spics.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
gpio-sta2x11.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-stmpe.c
gpio: stmpe: enforce device tree only mode
2015-01-20 11:03:22 +01:00
gpio-stp-xway.c
gpio: stp-xway: Use the of_property_read_u32 helper
2015-06-02 11:22:02 +02:00
gpio-sx150x.c
gpio: sx150x: fixup OF support
2015-01-22 09:45:24 +01:00
gpio-syscon.c
gpio: syscon: reduce message level when direction reg offset not in dt
2015-03-27 11:17:08 +01:00
gpio-tb10x.c
gpio: tb10x: Drop unneeded free_irq() call
2015-06-02 11:25:42 +02:00
gpio-tc3589x.c
mfd: tc3589x: Enforce device-tree only mode
2015-03-26 14:20:17 +00:00
gpio-tegra.c
Drivers: gpio: Fix spelling errors
2015-05-19 16:52:30 +02:00
gpio-timberdale.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-tps6586x.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-tps65910.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-tps65912.c
gpio: tps65912: fix wrong container_of arguments
2015-02-23 15:40:32 +01:00
gpio-ts5500.c
gpio: Constify platform_device_id
2015-05-12 09:41:28 +02:00
gpio-twl4030.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-twl6040.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-tz1090-pdc.c
gpio: tz1090-pdc: Use resource_size to fix off-by-one resource size calculation
2015-01-29 10:34:13 +01:00
gpio-tz1090.c
gpio: tz1090: Use resource_size to fix off-by-one
2015-01-15 17:23:21 +01:00
gpio-ucb1400.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-vf610.c
gpio: vf610: Replaces comma between expression statements by semicolon
2015-03-06 11:17:36 +01:00
gpio-viperboard.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-vr41xx.c
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
gpio-vx855.c
gpio: vx855: Switch to use managed resources APIs
2015-01-15 17:23:18 +01:00
gpio-wm831x.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-wm8350.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-wm8994.c
gpio: remove all usage of gpio_remove retval in driver/gpio
2014-07-22 16:39:26 +02:00
gpio-xgene-sb.c
gpio: xgene: add ACPI support for APM X-Gene GPIO standby driver
2015-06-02 14:52:00 +02:00
gpio-xgene.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-xilinx.c
gpio: xilinx: Fix kernel-doc warnings
2015-05-12 09:56:26 +02:00
gpio-xlp.c
gpio: xlp: Add missing .owner and .label settings for gpio_chip
2015-05-12 13:23:24 +02:00
gpio-xtensa.c
gpio: drop owner assignment from platform_drivers
2014-10-20 16:20:31 +02:00
gpio-zevio.c
gpio: zevio: Use of_mm_gpiochip_remove
2015-01-20 11:18:56 +01:00
gpio-zynq.c
gpio: Added support to Zynq Ultrascale+ MPSoC
2015-06-10 09:44:17 +02:00
gpiolib-acpi.c
gpio / ACPI: Return -EPROBE_DEFER if the gpiochip was not found
2015-06-11 10:17:32 +02:00
gpiolib-legacy.c
gpio: fix deferred probe detection for legacy API
2014-12-02 15:46:36 +01:00
gpiolib-of.c
Drivers: gpio: Fix spelling errors
2015-05-19 16:52:30 +02:00
gpiolib-sysfs.c
gpio: sysfs: move irq trigger flags to class-device data
2015-05-12 10:47:57 +02:00
gpiolib.c
gpio: improve error reporting on own descriptors
2015-06-10 10:15:46 +02:00
gpiolib.h
gpio: sysfs: move irq trigger flags to class-device data
2015-05-12 10:47:57 +02:00
Kconfig
gpio: Added support to Zynq Ultrascale+ MPSoC
2015-06-10 09:44:17 +02:00
Makefile
gpio: add ETRAXFS GPIO driver
2015-06-10 09:11:10 +02:00