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Geert Uytterhoeven 828546e242 gpio: Add GPIO Aggregator 
GPIO controllers are exported to userspace using /dev/gpiochip*
character devices.  Access control to these devices is provided by
standard UNIX file system permissions, on an all-or-nothing basis:
either a GPIO controller is accessible for a user, or it is not.
Currently no mechanism exists to control access to individual GPIOs.

Hence add a GPIO driver to aggregate existing GPIOs, and expose them as
a new gpiochip.

This supports the following use cases:
  - Aggregating GPIOs using Sysfs
    This is useful for implementing access control, and assigning a set
    of GPIOs to a specific user or virtual machine.
  - Generic GPIO Driver
    This is useful for industrial control, where it can provide
    userspace access to a simple GPIO-operated device described in DT,
    cfr. e.g. spidev for SPI-operated devices.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Link: https://lore.kernel.org/r/20200511145257.22970-5-geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2020-05-18 10:12:42 +02:00
..
gpio-74x164.c
gpio: 74x164: utilize the for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-74xx-mmio.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-104-dio-48e.c
gpio: 104-dio-48e: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-104-idi-48.c
gpio: 104-idi-48: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-104-idio-16.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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-aggregator.c
gpio: Add GPIO Aggregator
2020-05-18 10:12:42 +02:00
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: change to platform_get_irq_optional to avoid false-positive error
2020-01-09 10:35:05 +01:00
gpio-amd8111.c
gpio: amd8111: Include proper header
2018-01-13 22:22:49 +01:00
gpio-amd-fch.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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-sgpio.c
gpio: aspeed-sgpio: fixed typos
2020-01-23 16:16:05 +01:00
gpio-aspeed.c
gpio: aspeed-sgpio: fixed typos
2020-01-23 16:16:05 +01:00
gpio-ath79.c
gpio: ath79: use devm_platform_ioremap_resource()
2019-10-09 18:20:19 +02:00
gpio-bcm-kona.c
gpio: bcm-kona: use platform_irq_count
2019-12-11 11:06:31 +01:00
gpio-bd9571mwv.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-bd70528.c
This is the bulk of GPIO changes for the v5.5 kernel cycle
2019-12-01 17:56:50 -08:00
gpio-bd71828.c
gpio: bd71828: Remove unneeded defines for GPIO_LINE_DIRECTION_IN/OUT
2020-02-10 10:55:18 +01:00
gpio-brcmstb.c
gpio: brcmstb: support gpio-line-names property
2020-03-26 00:02:03 +01:00
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: aspeed-sgpio: fixed typos
2020-01-23 16:16:05 +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: Unconditionally assign .request()/.free()
2020-04-02 09:16:06 +02:00
gpio-dln2.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-dwapb.c
gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h
2019-07-31 00:57:21 +02:00
gpio-eic-sprd.c
Revert "gpio: eic-sprd: Use devm_platform_ioremap_resource()"
2020-04-02 09:39:09 +02:00
gpio-em.c
gpio: em: Use platform_get_irq() to obtain interrupts
2019-11-13 13:47:48 +01:00
gpio-ep93xx.c
gpio: ep93xx: Pass irqchip when adding gpiochip
2019-09-04 10:59:10 +02:00
gpio-exar.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-f7188x.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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: ge: Fix build warning
2018-05-16 14:35:24 +02:00
gpio-gpio-mm.c
gpio: gpio-mm: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-grgpio.c
gpio: Remove the unused flags
2020-01-15 11:24:19 +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: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-ich.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-logicvc.c
gpio: Add support for the Xylon LogiCVC GPIOs
2019-12-13 09:50:29 +01:00
gpio-loongson1.c
drivers: gpio: loongon1: use devm_platform_ioremap_resource()
2019-04-05 00:04:26 +07:00
gpio-loongson.c
MIPS: Loongson64: Rename CPU TYPES
2019-10-31 15:03:10 -07:00
gpio-lp873x.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-lp3943.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372
2019-06-05 17:37:10 +02:00
gpio-lp87565.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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-madera.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
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
gpio: max3191x: utilize the for_each_set_clump8 macro
2019-12-04 19:44:13 -08:00
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
This is the bulk of GPIO changes for the v5.5 kernel cycle
2019-12-01 17:56:50 -08:00
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
drivers: mcb: use symbol namespaces
2019-11-03 19:54:53 +01:00
gpio-merrifield.c
gpio: merrifield: Pass irqchip when adding gpiochip
2019-11-13 15:30:53 +02:00
gpio-ml-ioh.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167
2019-05-30 11:26:39 -07:00
gpio-mlxbf2.c
gpio: add driver for Mellanox BlueField 2 GPIO controller
2020-03-09 09:47:50 +01:00
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: introduce BGPIOF_NO_SET_ON_INPUT
2020-03-25 09:50:45 +01:00
gpio-mockup.c
gpio: mockup: coding-style fix
2020-02-20 15:41:05 +01:00
gpio-moxtet.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-mpc8xxx.c
Linux 5.5-rc6
2020-01-17 08:59:29 +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: add BGPIOF_NO_SET_ON_INPUT flag
2020-03-25 09:50:45 +01:00
gpio-mvebu.c
gpio: mvebu: avoid error message for optional IRQ
2020-03-25 09:50:45 +01:00
gpio-mxc.c
gpio: Unconditionally assign .request()/.free()
2020-04-02 09:16:06 +02:00
gpio-mxs.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-octeon.c
drivers: gpio: octeon: use devm_platform_ioremap_resource()
2019-04-05 00:04:27 +07:00
gpio-omap.c
Revert "gpio: omap: Fix lost edge wake-up interrupts"
2020-03-09 10:24:46 +01:00
gpio-palmas.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
gpio-pca953x.c
Linux 5.5-rc6
2020-01-17 08:59:29 +01:00
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
gpio: pci-idio-16: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-pcie-idio-24.c
gpio: pcie-idio-24: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-pisosr.c
gpio: pisosr: utilize the for_each_set_clump8 macro
2019-12-04 19:44:13 -08:00
gpio-pl061.c
gpio: Unconditionally assign .request()/.free()
2020-04-02 09:16:06 +02:00
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: Unconditionally assign .request()/.free()
2020-04-02 09:16:06 +02:00
gpio-raspberrypi-exp.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +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: Fix typo in comment
2020-02-20 09:18:54 +01:00
gpio-rda.c
gpio: Add RDA Micro GPIO controller support
2019-10-29 15:12:52 +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
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-sa1100.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-sama5d2-piobu.c
gpio: remove unneeded MODULE_VERSION() usage
2019-12-12 17:09:50 +01:00
gpio-sch311x.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-sch.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-sifive.c
gpio: sifive: fix static checker warning
2020-02-10 13:54:17 +01:00
gpio-siox.c
gpio: siox: use raw spinlock for irq related locking
2020-02-21 14:51:56 +01:00
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: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +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 unneeded MODULE_VERSION() usage
2019-12-12 17:09:50 +01:00
gpio-tc3589x.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-tegra186.c
gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1
2020-03-27 11:38:21 +01:00
gpio-tegra.c
gpio: tegra: Use NOIRQ phase for suspend/resume
2019-12-20 10:58:23 +01:00
gpio-thunderx.c
gpio: thunderx: Switch to GPIOLIB_IRQCHIP
2020-01-15 11:18:29 +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: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-tps6586x.c
gpio: tps65xxx: Use SPDX license tag
2018-09-04 08:22:47 +02:00
gpio-tps65086.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-tps65218.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111
2019-05-24 17:39:01 +02:00
gpio-tps65910.c
gpio: tps65xxx: Use SPDX license tag
2018-09-04 08:22:47 +02:00
gpio-tps65912.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-tps68470.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-tqmx86.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +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: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-ts5500.c
gpio: ts5500: Delete platform data handling
2018-09-04 08:22:47 +02:00
gpio-twl4030.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-twl6040.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-ucb1400.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
gpio-uniphier.c
gpio: uniphier: Replace zero-length array with flexible-array member
2020-03-02 08:52:55 +01:00
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: vx855: fixed a typo
2020-01-15 13:45:01 +01:00
gpio-wcd934x.c
gpio: wcd934x: Fix logic of wcd_gpio_get
2020-02-10 10:50:58 +01:00
gpio-wcove.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-winbond.c
gpio: winbond: Add driver
2018-01-09 14:51:00 +01:00
gpio-wm831x.c
gpio: wm8xxx: Cut down on boilerplate
2018-09-17 10:55:24 -07:00
gpio-wm8350.c
gpio: wm8xxx: Cut down on boilerplate
2018-09-17 10:55:24 -07:00
gpio-wm8994.c
gpio: wm8xxx: Cut down on boilerplate
2018-09-17 10:55:24 -07:00
gpio-ws16c48.c
gpio: ws16c48: utilize for_each_set_clump8 macro
2019-12-04 19:44:12 -08:00
gpio-xgene-sb.c
gpiolib: acpi: Split ACPI stuff to gpiolib-acpi.h
2019-07-31 00:57:21 +02:00
gpio-xgene.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-xgs-iproc.c
This is the bulk of pin control changes for the v5.6 kernel cycle:
2020-01-29 09:51:36 -08:00
gpio-xilinx.c
gpio: xilinx: Fix bug where the wrong GPIO register is written to
2020-02-10 12:52:34 +01:00
gpio-xlp.c
gpio: xlp: Pass irqchip when adding gpiochip
2019-08-15 09:55:07 +02:00
gpio-xra1403.c
gpio: Use new GPIO_LINE_DIRECTION
2019-11-07 09:27:48 +01:00
gpio-xtensa.c
gpio: xtensa: fix driver build
2019-12-09 10:40:18 +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: Unconditionally assign .request()/.free()
2020-04-02 09:16:06 +02:00
gpio-zynq.c
gpio: zynq: Fix for bug in zynq_gpio_restore_context API
2020-01-07 11:24:44 +01:00
gpiolib-acpi.c
gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model
2020-03-24 10:06:54 +01:00
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: Move devres calls to devres file
2020-03-20 10:23:06 +01:00
gpiolib-legacy.c
gpio: Use SPDX header for core library
2018-09-25 09:08:48 +02:00
gpiolib-of.c
gpio: of: Add DT overlay support for GPIO hogs
2020-02-21 17:10:33 +01:00
gpiolib-of.h
gpio: of: Add DT overlay support for GPIO hogs
2020-02-21 17:10:33 +01:00
gpiolib-sysfs.c
gpiolib: Add GPIOCHIP_NAME definition
2019-12-12 11:36:13 +01:00
gpiolib.c
gpiolib: Add support for GPIO lookup by line name
2020-05-18 10:12:42 +02:00
gpiolib.h
gpio: of: Add DT overlay support for GPIO hogs
2020-02-21 17:10:33 +01:00
Kconfig
gpio: Add GPIO Aggregator
2020-05-18 10:12:42 +02:00
Makefile
gpio: Add GPIO Aggregator
2020-05-18 10:12:42 +02:00
TODO
gpio: Update TODO
2020-01-09 03:01:33 +01:00