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android_kernel_motorola_sm6375/drivers/gpio
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Filename Latest commit message Latest commit date
Uwe Kleine-König 3296e566b0 gpio: pca953x: fix handling of automatic address incrementing 
[ Upstream commit bcf41dc480b179bfb669a232080a2e26dc7294b4 ]

Some of the chips supported by the pca953x driver need the most
significant bit in the address word set to automatically increment the
address pointer on subsequent reads and writes (example: PCA9505). With
this bit unset the same register is read multiple times on a multi-byte
read sequence. Other chips must not have this bit set and autoincrement
always (example: PCA9555).

Up to now this AI bit was interpreted to be part of the address, which
resulted in inconsistent regmap caching when a register was written with
AI set and then read without it. This happened for the PCA9505 in
pca953x_gpio_set_multiple() where pca953x_read_regs() bulk read from the
cache for registers 0x8-0xc and then wrote to registers 0x88-0x8c. (Side
note: reading 5 values from offset 0x8 yiels OP0 5 times because AI must
be set to get OP0-OP4, which is another bug that is resolved here as a
by-product.) The same problem happens when calls to gpio_set_value() and
gpio_set_array_value() were mixed.

With this patch the AI bit is always set for chips that support it. This
works as there are no code locations that make use of the behaviour with
AI unset (for the chips that support it).

Note that the call to pca953x_setup_gpio() had to be done a bit earlier
to make the NBANK macro work.

The history of this bug is a bit complicated. Commit b32cecb46b
("gpio: pca953x: Extract the register address mangling to single
function") changed which chips and functions are affected. Commit
3b00691cc4 ("gpio: pca953x: hack to fix 24 bit gpio expanders") used
some duct tape to make the driver at least appear to work. Commit
4942723276 ("gpio: pca953x: Perform basic regmap conversion")
introduced the caching. Commit b4818afeac ("gpio: pca953x: Add
set_multiple to allow multiple bits to be set in one write.") introduced
the .set_multiple() callback which didn't work for chips that need the
AI bit which was fixed later for some chips in 8958262af3 ("gpio:
pca953x: Repair multi-byte IO address increment on PCA9575"). So I'm
sorry, I don't know which commit I should pick for a Fixes: line.

Tested-by: Marcel Gudert <m.gudert@eckelmann.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-24 17:50:22 +02:00
..
gpio-74x164.c gpio: 74x164: Convert to use SPDX identifier 2019-03-26 18:38:07 +01:00
gpio-74xx-mmio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-104-dio-48e.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-104-idi-48.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-104-idio-16.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-adnp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-adp5520.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
gpio-adp5588.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
gpio-altera-a10sr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
gpio-altera.c gpio: altera: Pass irqchip when adding gpiochip 2019-07-03 10:24:12 +02:00
gpio-amd-fch.c drivers: gpio: amd-fch: make resource struct const 2019-07-03 10:10:32 +02:00
gpio-amd8111.c
gpio-amdpt.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-arizona.c gpio: arizona: Use local copy of pdata 2019-08-05 11:42:29 +02:00
gpio-aspeed.c gpio: aspeed: Add in ast2600 details to Aspeed driver 2019-09-11 11:13:11 +01:00
gpio-ath79.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-bcm-kona.c gpio: bcm-kona: Fix return value of bcm_kona_gpio_probe() 2020-06-03 08:21:21 +02:00
gpio-bd9571mwv.c
gpio-bd70528.c gpio: bd70528: Use correct unit for debounce times 2019-11-12 11:18:52 +01:00
gpio-brcmstb.c gpio: Remove dev_err() usage after platform_get_irq() 2019-08-05 13:25:34 +02:00
gpio-bt8xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
gpio-cadence.c gpio: cadence: Pass irqchip when adding gpiochip 2019-08-15 09:44:19 +02:00
gpio-clps711x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-creg-snps.c gpio: creg-snps: use devm_platform_ioremap_resource() to simplify code 2019-09-11 14:50:02 +01:00
gpio-crystalcove.c gpio: crystalcove: Convert to use SPDX identifier 2019-02-08 15:55:40 +02:00
gpio-cs5535.c docs: driver-model: move it to the driver-api book 2019-07-15 11:03:02 -03:00
gpio-da9052.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-da9055.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-davinci.c gpio: davinci: silence error prints in case of EPROBE_DEFER 2019-07-15 11:52:34 +02:00
gpio-dln2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
gpio-dwapb.c gpio: dwapb: Append MODULE_ALIAS for platform driver 2020-06-24 17:50:21 +02:00
gpio-eic-sprd.c gpio: eic: sprd: Fix the incorrect EIC offset when toggling 2019-10-01 11:50:40 +02:00
gpio-em.c gpio: em: use a helper variable for &pdev->dev 2019-07-22 14:40:07 +02:00
gpio-ep93xx.c gpio: ep93xx: Pass irqchip when adding gpiochip 2019-09-04 10:59:10 +02:00
gpio-exar.c gpio: exar: Fix bad handling for ida_simple_get error path 2020-06-03 08:21:19 +02:00
gpio-f7188x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-ftgpio010.c gpio: ftgpio: Fix an error handling path in 'ftgpio_gpio_probe()' 2019-08-23 12:02:34 +02:00
gpio-ge.c
gpio-gpio-mm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-grgpio.c gpio: gpio-grgpio: fix possible sleep-in-atomic-context bugs in grgpio_irq_map/unmap() 2020-02-24 08:36:26 +01:00
gpio-gw-pld.c gpio: Add a Gateworks PLD GPIO driver 2019-02-09 11:33:37 +01:00
gpio-hlwd.c gpio: hlwd: Pass irqchip when adding gpiochip 2019-08-15 09:57:29 +02:00
gpio-htc-egpio.c gpio: htc-egpio: Remove unused exported htc_egpio_get_wakeup_irq() 2019-09-12 10:07:44 +01:00
gpio-ich.c gpio: ich: Convert to use SPDX identifier 2018-12-07 17:34:07 +02:00
gpio-intel-mid.c gpio: intel-mid: Move hardware initialization to callback 2019-10-15 01:18:51 +02:00
gpio-iop.c Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
gpio-it87.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 300 2019-06-05 17:37:00 +02:00
gpio-ixp4xx.c gpio: updates for v5.4 2019-09-03 16:04:19 +02:00
gpio-janz-ttl.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-kempld.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 294 2019-06-05 17:36:38 +02:00
gpio-loongson.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-loongson1.c drivers: gpio: loongon1: use devm_platform_ioremap_resource() 2019-04-05 00:04:26 +07:00
gpio-lp873x.c
gpio-lp3943.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
gpio-lp87565.c
gpio-lpc18xx.c drivers: gpio: lpc18xx: use devm_platform_ioremap_resource() 2019-04-05 00:04:26 +07:00
gpio-lpc32xx.c gpio: lpc32xx: allow building on non-lpc32xx targets 2019-08-15 21:33:07 +02:00
gpio-lynxpoint.c gpio: lynxpoint: Setup correct IRQ handlers 2020-01-04 19:18:20 +01:00
gpio-madera.c gpio: madera: Add support for Cirrus Logic CS47L92 2019-08-05 11:45:24 +02:00
gpio-max730x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-max732x.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-max3191x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-max7300.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-max7301.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-max77620.c gpio: max77620: Fixup debounce delays 2019-11-12 11:13:54 +01:00
gpio-max77650.c gpio: max77650: add MODULE_ALIAS() 2019-07-29 00:03:52 +02:00
gpio-mb86s7x.c gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h 2019-07-31 00:57:21 +02:00
gpio-mc9s08dz60.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
gpio-mc33880.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 176 2019-05-30 11:29:19 -07:00
gpio-menz127.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
gpio-merrifield.c Revert "gpio: merrifield: Pass irqchip when adding gpiochip" 2019-11-03 23:41:11 +01:00
gpio-ml-ioh.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
gpio-mlxbf.c gpio: mlxbf: remove unused including <linux/version.h> 2019-04-08 08:47:06 +02:00
gpio-mm-lantiq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-mmio.c gpio: mmio: Drop bgpio_dir_inverted 2019-04-08 11:17:43 +02:00
gpio-mockup.c gpio: mockup: add missing single_release() 2019-09-09 09:55:27 +02:00
gpio-moxtet.c drivers: gpio: Add support for GPIOs over Moxtet bus 2019-08-14 15:30:56 +02:00
gpio-mpc8xxx.c gpio: mpc8xxx: Add platform device to gpiochip->parent 2020-01-17 19:49:03 +01:00
gpio-mpc5200.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
gpio-msic.c gpio: msic: Convert to use SPDX identifier 2019-02-08 15:55:41 +02:00
gpio-mt7621.c gpio: mt7621: Pass irqchip when adding gpiochip 2019-08-23 12:05:06 +02:00
gpio-mvebu.c pwm: Ensure pwm_apply_state() doesn't modify the state argument 2019-09-21 03:25:10 +02:00
gpio-mxc.c gpio: mxc: Only get the second IRQ when there is more than one IRQ 2020-01-04 19:16:27 +01:00
gpio-mxs.c gpio: mxs: read pin level directly instead of using .get 2018-12-21 11:29:57 +01:00
gpio-octeon.c drivers: gpio: octeon: use devm_platform_ioremap_resource() 2019-04-05 00:04:27 +07:00
gpio-omap.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-palmas.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
gpio-pca953x.c gpio: pca953x: fix handling of automatic address incrementing 2020-06-24 17:50:22 +02:00
gpio-pcf857x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
gpio-pch.c gpio: pch: Use dev_get_drvdata 2019-07-23 18:59:05 +03:00
gpio-pci-idio-16.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-pcie-idio-24.c
gpio-pisosr.c
gpio-pl061.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-pmic-eic-sprd.c gpio: Remove dev_err() usage after platform_get_irq() 2019-08-05 13:25:34 +02:00
gpio-pxa.c gpio: pxa: Fix return value of pxa_gpio_probe() 2020-06-03 08:21:21 +02:00
gpio-raspberrypi-exp.c gpio: raspberrypi-exp: decrease refcount on firmware dt node 2018-12-17 15:28:30 +01:00
gpio-rc5t583.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
gpio-rcar.c gpio: rcar: Pedantic formatting 2019-06-27 15:56:50 +01:00
gpio-rdc321x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
gpio-reg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233 2019-06-19 17:09:06 +02:00
gpio-sa1100.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-sama5d2-piobu.c gpio: sama5d2-piobu: Set proper output level for direction_output 2019-01-11 10:34:37 +01:00
gpio-sch.c gpio: sch: Remove write-only core_base 2019-04-23 13:08:33 +02:00
gpio-sch311x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-siox.c gpio: siox: Use devm_ managed gpiochip 2019-07-03 10:24:02 +02:00
gpio-sodaville.c gpio: sodaville: Convert to use SPDX identifier 2018-12-07 17:34:08 +02:00
gpio-spear-spics.c drivers: gpio: spear-spics: use devm_platform_ioremap_resource() 2019-04-05 00:04:27 +07:00
gpio-sprd.c gpio: Remove dev_err() usage after platform_get_irq() 2019-08-05 13:25:34 +02:00
gpio-sta2x11.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
gpio-stmpe.c gpio: Initialize the irqchip valid_mask with a callback 2019-09-11 01:09:37 +01:00
gpio-stp-xway.c Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
gpio-syscon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gpio-tb10x.c gpio: Remove dev_err() usage after platform_get_irq() 2019-08-05 13:25:34 +02:00
gpio-tc3589x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 464 2019-06-19 17:09:10 +02:00
gpio-tegra.c gpio: tegra: mask GPIO IRQs during IRQ shutdown 2020-06-03 08:21:09 +02:00
gpio-tegra186.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233 2019-06-19 17:09:06 +02:00
gpio-thunderx.c Revert "gpio: thunderx: Switch to GPIOLIB_IRQCHIP" 2020-01-23 08:22:29 +01:00
gpio-timberdale.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 176 2019-05-30 11:29:19 -07:00
gpio-tpic2810.c
gpio-tps6586x.c
gpio-tps65086.c
gpio-tps65218.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111 2019-05-24 17:39:01 +02:00
gpio-tps65910.c
gpio-tps65912.c
gpio-tps68470.c
gpio-tqmx86.c gpio: Initialize the irqchip valid_mask with a callback 2019-09-11 01:09:37 +01:00
gpio-ts4800.c drivers: gpio: ts4800: use devm_platform_ioremap_resource() 2019-04-05 00:04:28 +07:00
gpio-ts4900.c
gpio-ts5500.c
gpio-twl4030.c
gpio-twl6040.c
gpio-ucb1400.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-uniphier.c drivers: gpio: uniphier: use devm_platform_ioremap_resource() 2019-04-05 00:04:28 +07:00
gpio-vf610.c gpio: vf610: Pass irqchip when adding gpiochip 2019-08-23 09:41:18 +02:00
gpio-viperboard.c gpio: viperboard: Replace 'unsigned' with 'unsigned int' 2019-08-05 11:26:58 +02:00
gpio-vr41xx.c gpio: vr41xx: Use devm_platform_ioremap_resource() 2019-06-27 15:56:51 +01:00
gpio-vx855.c
gpio-wcove.c gpio: wcove: Convert to use SPDX identifier 2019-02-08 15:55:41 +02:00
gpio-winbond.c
gpio-wm831x.c
gpio-wm8350.c
gpio-wm8994.c
gpio-ws16c48.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
gpio-xgene-sb.c gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h 2019-07-31 00:57:21 +02:00
gpio-xgene.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
gpio-xilinx.c gpio: xilinx: Fix bug where the wrong GPIO register is written to 2020-02-19 19:53:02 +01:00
gpio-xlp.c gpio: xlp: Pass irqchip when adding gpiochip 2019-08-15 09:55:07 +02:00
gpio-xra1403.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
gpio-xtensa.c gpio: xtensa: fix driver build 2020-01-09 10:19:59 +01:00
gpio-zevio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio-zx.c gpio: zx: Pass irqchip when adding gpiochip 2019-08-23 09:40:44 +02:00
gpio-zynq.c gpio: zynq: Fix for bug in zynq_gpio_restore_context API 2020-01-17 19:48:20 +01:00
gpiolib-acpi.c gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model 2020-04-02 15:11:01 +02:00
gpiolib-acpi.h gpiolib: acpi: make acpi_can_fallback_to_crs() static 2019-09-10 11:34:20 +01:00
gpiolib-devprop.c gpiolib: devprop: Fix syntax error 2019-04-08 11:20:12 +02:00
gpiolib-devres.c gpio: devres: Switch to EXPORT_SYMBOL_GPL() 2019-09-11 14:47:39 +01:00
gpiolib-legacy.c
gpiolib-of.c mmc: core: Rework wp-gpio handling 2020-02-19 19:53:10 +01:00
gpiolib-of.h gpio: of: Make of_get_named_gpiod_flags() private 2019-09-11 14:45:01 +01:00
gpiolib-sysfs.c
gpiolib.c gpio: fix locking open drain IRQ lines 2020-06-03 08:21:28 +02:00
gpiolib.h gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h 2019-07-31 00:57:21 +02:00
Kconfig gpio: max77620: Add missing dependency on GPIOLIB_IRQCHIP 2020-02-01 09:34:45 +00:00
Makefile ARM: SoC driver updates for v5.4 2019-09-16 15:52:38 -07:00
sgpio-aspeed.c gpio: aspeed: avoid return type warning 2020-01-26 10:01:09 +01:00
TODO gpio: Add GPIOLIB_IRQCHIP cleanup to TODO 2019-06-14 10:16:15 +02:00