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85b03b3033
linux/drivers/gpio
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Johan Hovold 85b03b3033 Revert "gpiolib: Split GPIO flags parsing and GPIO configuration" 
This reverts commit 923b93e451.

Make sure consumers do not overwrite gpio flags for pins that have
already been claimed.

While adding support for gpio drivers to refuse a request using
unsupported flags, the order of when the requested flag was checked and
the new flags were applied was reversed to that consumers could
overwrite flags for already requested gpios.

This not only affects device-tree setups where two drivers could request
the same gpio using conflicting configurations, but also allowed user
space to clear gpio flags for already claimed pins simply by attempting
to export them through the sysfs interface. By for example clearing the
FLAG_ACTIVE_LOW flag this way, user space could effectively change the
polarity of a signal.

Reverting this change obviously prevents gpio drivers from doing sanity
checks on the flags in their request callbacks. Fortunately only one
recently added driver (gpio-tps65218 in v4.6) appears to do this, and a
follow up patch could restore this functionality through a different
interface.

Cc: stable <stable@vger.kernel.org>	# 4.4
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-07-04 16:51:29 +02:00
..
devres.c gpio: Propagate all errors in devm_get_gpiod_from_child() 2016-02-25 10:04:25 +01:00
gpio-74x164.c gpio: 74x164: add dt support for nxp's 74x594 2016-03-31 10:25:51 +02:00
gpio-74xx-mmio.c gpio: 74xx-mmio: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:19:42 +05:30
gpio-104-dio-48e.c gpio: 104-dio-48e: Fix control port offset computation off-by-one error 2016-06-08 10:08:12 +02:00
gpio-104-idi-48.c gpio: 104-idi-48: Fix missing spin_lock_init for ack_lock 2016-06-13 14:48:10 +02:00
gpio-104-idio-16.c gpio: 104-idio-16: Utilize the ISA bus driver 2016-05-02 09:32:04 -07:00
gpio-adnp.c gpio: adnp: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:19:46 +05:30
gpio-adp5520.c gpio: adp5520: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:34:06 +05:30
gpio-adp5588.c gpio: adp5588: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:34:24 +05:30
gpio-altera.c gpio: gpio-altera: Remove gpiochip on probe failure. 2016-01-27 10:50:22 +01:00
gpio-amd8111.c gpio: amd8111: Use devm_request_region 2016-02-16 00:19:52 +01:00
gpio-amdpt.c gpio: amdpt: Add a new ACPI HID 2016-03-30 10:38:51 +02:00
gpio-arizona.c gpio: arizona: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:34:29 +05:30
gpio-ath79.c gpio: ath79: Check valid gpio count for both DT and non-DT cases 2016-02-25 15:20:43 +01:00
gpio-bcm-kona.c gpio: bcm-kona: fix bcm_kona_gpio_reset() warnings 2016-06-08 14:04:35 +02:00
gpio-brcmstb.c gpio: brcmstb: Return proper error if bank width is invalid 2016-04-15 10:09:48 +02:00
gpio-bt8xx.c gpio: bt8xx: use gpiochip data pointer 2016-01-05 11:21:03 +01:00
gpio-clps711x.c gpio: clps711x: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:27 +05:30
gpio-crystalcove.c gpio: crystalcove: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:27 +05:30
gpio-cs5535.c gpio: cs5535: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:28 +05:30
gpio-da9052.c gpio: da9052: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:29 +05:30
gpio-da9055.c gpio: da9055: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:29 +05:30
gpio-davinci.c Merge branch 'devel' into for-next 2016-02-22 13:47:49 +01:00
gpio-dln2.c gpio: dln2: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:30 +05:30
gpio-dwapb.c gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms 2016-05-11 11:32:39 +02:00
gpio-em.c gpio: em: use gpiochip data pointer 2016-01-05 11:21:05 +01:00
gpio-ep93xx.c gpio: ep93xx: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:30 +05:30
gpio-etraxfs.c gpio: generic: factor into gpio_chip struct 2016-01-05 11:21:00 +01:00
gpio-f7188x.c gpio: f7188x: fix edit mistake 2016-04-18 13:32:20 +02:00
gpio-ge.c gpio: ge: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:31 +05:30
gpio-grgpio.c gpio: generic: factor into gpio_chip struct 2016-01-05 11:21:00 +01:00
gpio-ich.c gpio: ich: Use devm_request_region 2016-02-16 00:19:53 +01:00
gpio-intel-mid.c gpio: intel-mid: use gpiochip data pointer 2016-01-05 11:21:05 +01:00
gpio-iop.c gpio: iop: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:32 +05:30
gpio-it87.c gpio: gpio-it87: Add support for IT8620 and IT8628 2016-03-31 11:59:43 +02:00
gpio-janz-ttl.c gpio: janz-ttl: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:33 +05:30
gpio-kempld.c gpio: kempld: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:34 +05:30
gpio-ks8695.c gpio: ks8695: remove irq_to_gpio function 2016-02-19 00:20:30 +01:00
gpio-loongson.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-loongson1.c gpio: Loongson1: add Loongson1 GPIO driver 2016-04-09 20:14:35 +02:00
gpio-lp3943.c Revert "gpio: lp3943: Drop pin_used and lp3943_gpio_request/lp3943_gpio_free" 2016-03-09 22:00:27 +07:00
gpio-lpc18xx.c gpio: lpc18xx: use gpiochip data pointer 2016-01-05 11:21:06 +01:00
gpio-lpc32xx.c gpio: lpc32xx: disable broken to_irq support 2016-05-30 09:42:03 +02:00
gpio-lynxpoint.c gpio: lynxpoint: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:35 +05:30
gpio-max730x.c gpio: max730x: use gpiochip data pointer 2016-01-05 11:21:07 +01:00
gpio-max732x.c gpio: max732x: use gpiochip data pointer 2016-01-05 11:21:07 +01:00
gpio-max7300.c gpio: Drop owner assignment from i2c_driver 2015-11-30 09:31:00 +01:00
gpio-max7301.c spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
gpio-mb86s7x.c gpio: mb86s7x: make explicitly non-modular 2016-03-31 15:00:28 +02:00
gpio-mc9s08dz60.c gpio: mc9s08dz60: make explicitly non-modular 2016-03-31 15:02:09 +02:00
gpio-mc33880.c gpio: mc33880: use gpiochip data pointer 2016-01-05 11:21:07 +01:00
gpio-mcp23s08.c gpio: mcp23s08: Add support for level triggered interrupts 2016-03-31 10:41:50 +02:00
gpio-menz127.c This is the bulk of GPIO changes for kernel cycle v4.7: 2016-05-17 17:39:42 -07:00
gpio-ml-ioh.c gpio: ml-ioh: use gpiochip data pointer 2016-01-05 11:21:08 +01:00
gpio-mm-lantiq.c gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs() 2016-01-13 10:21:06 +01:00
gpio-mmio.c gpio: rename gpio-generic.c into gpio-mmio.c 2016-04-29 16:14:32 +02:00
gpio-moxart.c gpio: moxart: make explicitly non-modular 2016-03-31 15:03:13 +02:00
gpio-mpc8xxx.c gpio: mpc8xxx: Slightly update the code for better readability 2016-03-09 10:44:13 +07:00
gpio-mpc5200.c gpio: Include linux/gpio.h instead of asm/gpio.h 2016-02-16 00:20:03 +01:00
gpio-msic.c gpio: msic: use gpiochip data pointer 2016-01-05 11:21:09 +01:00
gpio-mvebu.c gpio: mvebu: make explicitly non-modular 2016-03-31 15:05:44 +02:00
gpio-mxc.c gpio: mxc: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:37 +05:30
gpio-mxs.c gpio: generic: factor into gpio_chip struct 2016-01-05 11:21:00 +01:00
gpio-octeon.c gpio: octeon: Constify octeon_gpio_match table 2016-03-30 10:38:51 +02:00
gpio-omap.c gpio: omap: fix irq triggering in smart-idle wakeup mode 2016-04-26 15:56:47 +02:00
gpio-palmas.c gpio: palmas: make explicitly non-modular 2016-04-05 17:02:36 +02:00
gpio-pca953x.c This is the bulk of GPIO changes for kernel cycle v4.7: 2016-05-17 17:39:42 -07:00
gpio-pcf857x.c gpio: pcf857x: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:39 +05:30
gpio-pch.c gpio: pch: Optimize pch_gpio_get() 2016-01-05 15:46:34 +01:00
gpio-pisosr.c gpio: pisosr: Use gpiod_set_value_cansleep in pisosr_gpio_refresh() 2016-02-25 15:20:46 +01:00
gpio-pl061.c gpio: pl061: implement .get_direction() 2016-04-28 14:36:37 +02:00
gpio-pxa.c gpio: pxa: fix legacy non pinctrl aware builds 2016-04-08 10:10:08 +02:00
gpio-rc5t583.c gpio: rc5t583: make explicitly non-modular 2016-04-05 17:02:35 +02:00
gpio-rcar.c This is the bulk of GPIO changes for kernel cycle v4.7: 2016-05-17 17:39:42 -07:00
gpio-rdc321x.c gpio: rdc321x: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:41 +05:30
gpio-sa1100.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-sch.c gpio: sch: Fix Oops on module load on Asus Eee PC 1201 2016-07-04 16:50:40 +02:00
gpio-sch311x.c gpio: sch311x: Use devm_request_region 2016-02-16 00:19:53 +01:00
gpio-sodaville.c gpio: sodaville: make it explicitly non-modular 2016-05-11 13:46:49 +02:00
gpio-spear-spics.c gpio: spear-spics: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:42 +05:30
gpio-sta2x11.c gpio: sta2x11: make explicitly non-modular 2016-03-31 15:07:40 +02:00
gpio-stmpe.c gpio: stmpe: make it explicitly non-modular 2016-05-11 13:48:03 +02:00
gpio-stp-xway.c gpio: stp-xway: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:43 +05:30
gpio-sx150x.c gpio: sx150x: use the new open drain callback 2016-04-14 14:03:26 +02:00
gpio-syscon.c gpio: syscon: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:44 +05:30
gpio-tb10x.c gpio: tb10x: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:44 +05:30
gpio-tc3589x.c gpio: tc3589x: make explicitly non-modular 2016-04-05 17:02:35 +02:00
gpio-tegra.c gpio: tegra: Make lockdep class file-scoped 2016-06-22 17:58:07 +02:00
gpio-timberdale.c gpio: timberdale: make it explicitly non-modular 2016-05-11 13:49:11 +02:00
gpio-tpic2810.c gpio: tpic2810: Make sure cached buffer has consistent status with h/w status 2016-03-31 15:14:37 +02:00
gpio-tps6586x.c gpio: tps6586x: make explicitly non-modular 2016-04-05 17:02:37 +02:00
gpio-tps65086.c gpio: tps65086: Add GPO driver for the TPS65086 PMIC 2016-03-16 08:50:33 +00:00
gpio-tps65218.c gpio: tps65218: use the new open drain callback 2016-04-14 14:03:25 +02:00
gpio-tps65910.c gpio: tps65910: make explicitly non-modular 2016-04-05 17:02:37 +02:00
gpio-tps65912.c gpio: tps65912: fix bad merge 2016-03-09 22:02:52 +07:00
gpio-ts4800.c gpio: ts4800: Drop redundant code to set already initialized gpio_chip fields 2016-02-25 15:20:44 +01:00
gpio-ts5500.c gpio: ts5500: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:49 +05:30
gpio-twl4030.c gpio: twl4030: use gpiochip data pointer 2016-01-05 11:21:16 +01:00
gpio-twl6040.c gpio: twl6040: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:50 +05:30
gpio-tz1090-pdc.c gpio: tz1090-pdc: use gpiochip data pointer 2016-01-05 11:21:16 +01:00
gpio-tz1090.c gpio: tz1090: use gpiochip data pointer 2016-01-05 11:21:16 +01:00
gpio-ucb1400.c gpio: ucb1400: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:50 +05:30
gpio-vf610.c gpio: vf610: use gpiochip data pointer 2016-01-05 11:21:17 +01:00
gpio-viperboard.c gpio: viperboard: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:51 +05:30
gpio-vr41xx.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-vx855.c gpio: vx855: use the new open drain callback 2016-04-14 14:03:28 +02:00
gpio-wm831x.c gpio: wm831x: use the new open drain callback 2016-04-14 14:03:28 +02:00
gpio-wm8350.c gpio: wm8350: Use devm_gpiochip_add_data() for gpio registration 2016-02-23 20:35:52 +05:30
gpio-wm8994.c gpio: wm8994: use the new open drain callback 2016-04-14 14:03:29 +02:00
gpio-ws16c48.c gpio: ws16c48: Utilize the ISA bus driver 2016-05-02 09:32:04 -07:00
gpio-xgene-sb.c gpio: xgene-sb: Use irq_domain_free_irqs_common() 2016-03-31 10:22:53 +02:00
gpio-xgene.c This is the bulk of GPIO changes for kernel cycle v4.7: 2016-05-17 17:39:42 -07:00
gpio-xilinx.c gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs() 2016-01-07 10:06:56 +01:00
gpio-xlp.c remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
gpio-xtensa.c gpio: convert remaining users to gpiochip_add_data() 2016-01-05 11:21:20 +01:00
gpio-zevio.c gpio: zevio: make it explicitly non-modular 2016-05-11 13:50:01 +02:00
gpio-zx.c gpio: zx: make explicitly non-modular 2016-03-31 15:10:25 +02:00
gpio-zynq.c gpio: zynq: initialize clock even without CONFIG_PM 2016-06-08 10:36:29 +02:00
gpiolib-acpi.c gpiolib-acpi: Duplicate con_id string when adding it to the crs lookup list 2016-04-30 13:51:59 +02:00
gpiolib-legacy.c Revert "gpiolib: Split GPIO flags parsing and GPIO configuration" 2016-07-04 16:51:29 +02:00
gpiolib-of.c gpio: include <linux/io-mapping.h> in gpiolib-of 2016-06-08 10:58:20 +02:00
gpiolib-sysfs.c gpio: fix abi regression in sysfs 2016-02-25 16:08:45 +01:00
gpiolib.c Revert "gpiolib: Split GPIO flags parsing and GPIO configuration" 2016-07-04 16:51:29 +02:00
gpiolib.h gpio: move gpiod_set_array_value_priv() 2016-04-26 10:51:36 +02:00
Kconfig gpio: Allow PC/104 devices on X86_64 2016-06-17 20:21:12 -07:00
Makefile gpio: rename gpio-generic.c into gpio-mmio.c 2016-04-29 16:14:32 +02:00