1 # SPDX-License-Identifier: GPL-2.0-only
3 # GPIO infrastructure and drivers
6 config ARCH_HAVE_CUSTOM_GPIO_H
9 Selecting this config option from the architecture Kconfig allows
10 the architecture to provide a custom asm/gpio.h implementation
11 overriding the default implementations. New uses of this are
17 This enables GPIO support through the generic GPIO library.
18 You only need to enable this, if you also want to enable
19 one or more of the GPIO drivers below.
25 config GPIOLIB_FASTPATH_LIMIT
26 int "Maximum number of GPIOs for fast path"
30 This adjusts the point at which certain APIs will switch from
31 using a stack allocated buffer to a dynamically allocated buffer.
33 You shouldn't need to change this unless you really need to
34 optimize either stack space or performance. Change this carefully
35 since setting an incorrect value could cause stack corruption.
46 config GPIOLIB_IRQCHIP
51 bool "Debug GPIO calls"
52 depends on DEBUG_KERNEL
54 Say Y here to add some extra checks and diagnostics to GPIO calls.
55 These checks help ensure that GPIOs have been properly initialized
56 before they are used, and that sleeping calls are not made from
57 non-sleeping contexts. They can make bitbanged serial protocols
58 slower. The diagnostics help catch the type of setup errors
59 that are most common when setting up new platforms or boards.
62 bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
64 select GPIO_CDEV # We need to encourage the new ABI
66 Say Y here to add the legacy sysfs interface for GPIOs.
68 This ABI is deprecated. If you want to use GPIO from userspace,
69 use the character device /dev/gpiochipN with the appropriate
70 ioctl() operations instead.
74 prompt "Character device (/dev/gpiochipN) support" if EXPERT
77 Say Y here to add the character device /dev/gpiochipN interface
78 for GPIOs. The character device allows userspace to control GPIOs
79 using ioctl() operations.
81 Only say N if you are sure that the GPIO character device is not
87 bool "Support GPIO ABI Version 1"
91 Say Y here to support version 1 of the GPIO CDEV ABI.
93 This ABI version is deprecated.
94 Please use the latest ABI for new developments.
99 depends on HAS_IOMEM # Only for IOMEM drivers
106 # put drivers in the right section, in alphabetical order
108 # This symbol is selected by both I2C and SPI expanders
112 menu "Memory mapped GPIO drivers"
115 config GPIO_74XX_MMIO
116 tristate "GPIO driver for 74xx-ICs with MMIO access"
120 Say yes here to support GPIO functionality for 74xx-compatible ICs
121 with MMIO access. Compatible models include:
122 1 bit: 741G125 (Input), 741G74 (Output)
123 2 bits: 742G125 (Input), 7474 (Output)
124 4 bits: 74125 (Input), 74175 (Output)
125 6 bits: 74365 (Input), 74174 (Output)
126 8 bits: 74244 (Input), 74273 (Output)
127 16 bits: 741624 (Input), 7416374 (Output)
130 tristate "Altera GPIO"
132 select GPIOLIB_IRQCHIP
134 Say Y or M here to build support for the Altera PIO device.
136 If driver is built as a module it will be called gpio-altera.
139 tristate "AMD Promontory GPIO support"
143 driver for GPIO functionality on Promontory IOHub
144 Require ACPI ASL code to enumerate as a platform device.
147 tristate "Aspeed GPIO support"
148 depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
149 select GPIOLIB_IRQCHIP
151 Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.
153 config GPIO_ASPEED_SGPIO
154 bool "Aspeed SGPIO support"
155 depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
157 select GPIOLIB_IRQCHIP
159 Say Y here to support Aspeed AST2500 SGPIO functionality.
162 tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
164 depends on ATH79 || COMPILE_TEST
166 select GPIOLIB_IRQCHIP
168 Select this option to enable GPIO driver for
169 Atheros AR71XX/AR724X/AR913X SoC devices.
171 config GPIO_RASPBERRYPI_EXP
172 tristate "Raspberry Pi 3 GPIO Expander"
173 default RASPBERRYPI_FIRMWARE
175 # Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
176 # happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
177 depends on (ARCH_BCM2835 && RASPBERRYPI_FIRMWARE) || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
179 Turn on GPIO support for the expander on Raspberry Pi 3 boards, using
180 the firmware mailbox to communicate with VideoCore on BCM283x chips.
183 bool "Broadcom Kona GPIO"
184 depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
186 Turn on GPIO support for Broadcom "Kona" chips.
188 config GPIO_BCM_XGS_IPROC
189 tristate "BRCM XGS iProc GPIO support"
190 depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
192 select GPIOLIB_IRQCHIP
193 default ARCH_BCM_IPROC
195 Say yes here to enable GPIO support for Broadcom XGS iProc SoCs.
198 tristate "BRCMSTB GPIO support"
199 default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
200 depends on OF_GPIO && (ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST)
204 Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
207 tristate "Cadence GPIO support"
210 select GPIOLIB_IRQCHIP
212 Say yes here to enable support for Cadence GPIO controller.
215 tristate "CLPS711X GPIO support"
216 depends on ARCH_CLPS711X || COMPILE_TEST
219 Say yes here to support GPIO on CLPS711X SoCs.
222 bool "TI Davinci/Keystone GPIO support"
223 default y if ARCH_DAVINCI
224 depends on (ARM || ARM64) && (ARCH_DAVINCI || ARCH_KEYSTONE || ARCH_K3)
226 Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
229 tristate "Synopsys DesignWare APB GPIO driver"
231 select GPIOLIB_IRQCHIP
233 Say Y or M here to build support for the Synopsys DesignWare APB
237 tristate "Spreadtrum EIC support"
238 depends on ARCH_SPRD || COMPILE_TEST
240 select GPIOLIB_IRQCHIP
242 Say yes here to support Spreadtrum EIC device.
245 tristate "Emma Mobile GPIO"
246 depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
248 Say yes here to support GPIO on Renesas Emma Mobile SoCs.
252 depends on ARCH_EP93XX
254 select GPIOLIB_IRQCHIP
257 tristate "Support for GPIO pins on XR17V352/354/358"
258 depends on SERIAL_8250_EXAR
261 Selecting this option will enable handling of GPIO pins present
262 on Exar XR17V352/354/358 chips.
265 bool "GE FPGA based GPIO"
269 Support for common GPIO functionality provided on some GE Single Board
272 This driver provides basic support (configure as input or output, read
273 and write pin state) for GPIO implemented in a number of GE single
276 config GPIO_FTGPIO010
277 bool "Faraday FTGPIO010 GPIO"
280 select GPIOLIB_IRQCHIP
281 default (ARCH_GEMINI || ARCH_MOXART)
283 Support for common GPIOs from the Faraday FTGPIO010 IP core, found in
284 Cortina systems Gemini platforms, Moxa ART and others.
286 config GPIO_GENERIC_PLATFORM
287 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
290 Say yes here to support basic platform_device memory-mapped GPIO controllers.
293 tristate "Aeroflex Gaisler GRGPIO support"
298 Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
299 VHDL IP core library.
302 tristate "HiSilicon GPIO controller driver"
303 depends on (ARM64 && ACPI) || COMPILE_TEST
305 select GPIOLIB_IRQCHIP
307 Say Y or M here to build support for the HiSilicon GPIO controller
309 This GPIO controller support double-edge interrupt and multi-core
313 tristate "Nintendo Wii (Hollywood) GPIO"
316 select GPIOLIB_IRQCHIP
318 Select this to support the GPIO controller of the Nintendo Wii.
323 tristate "Intel ICH GPIO"
327 Say yes here to support the GPIO functionality of a number of Intel
328 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
329 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
330 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
335 tristate "Intel IOP GPIO"
336 depends on ARCH_IOP32X || COMPILE_TEST
339 Say yes here to support the GPIO functionality of a number of Intel
345 bool "Intel IXP4xx GPIO"
346 depends on ARM # For <asm/mach-types.h>
347 depends on ARCH_IXP4XX
349 select GPIOLIB_IRQCHIP
350 select IRQ_DOMAIN_HIERARCHY
352 Say yes here to support the GPIO functionality of a number of Intel
353 IXP4xx series of chips.
357 tristate "Xylon LogiCVC GPIO support"
358 depends on MFD_SYSCON && OF
360 Say yes here to support GPIO functionality of the Xylon LogiCVC
361 programmable logic block.
364 bool "Loongson-2/3 GPIO support"
365 depends on CPU_LOONGSON2EF || CPU_LOONGSON64
367 driver for GPIO functionality on Loongson-2F/3A/3B processors.
370 tristate "NXP LPC18XX/43XX GPIO support"
371 default y if ARCH_LPC18XX
372 depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
373 select IRQ_DOMAIN_HIERARCHY
375 Select this option to enable GPIO driver for
376 NXP LPC18XX/43XX devices.
379 tristate "NXP LPC32XX GPIO support"
380 depends on OF_GPIO && (ARCH_LPC32XX || COMPILE_TEST)
382 Select this option to enable GPIO driver for
386 tristate "GPIO support for Fujitsu MB86S7x Platforms"
388 Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
391 tristate "MEN 16Z127 GPIO support"
395 Say yes here to support the MEN 16Z127 GPIO Controller
397 config GPIO_MM_LANTIQ
398 bool "Lantiq Memory mapped GPIOs"
399 depends on LANTIQ && SOC_XWAY
401 This enables support for memory mapped GPIOs on the External Bus Unit
402 (EBU) found on Lantiq SoCs. The gpios are output only as they are
403 created by attaching a 16bit latch to the bus.
407 depends on PPC_MPC52xx
410 bool "MPC512x/MPC8xxx/QorIQ GPIO support"
411 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
412 FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
417 Say Y here if you're going to use hardware that connects to the
418 MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
421 bool "Mediatek MT7621 GPIO Support"
422 depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
425 select GPIOLIB_IRQCHIP
427 Say yes here to support the Mediatek MT7621 SoC GPIO device
431 depends on PLAT_ORION || ARCH_MVEBU
433 select GENERIC_IRQ_CHIP
437 tristate "i.MX GPIO support"
438 depends on ARCH_MXC || COMPILE_TEST
440 select GENERIC_IRQ_CHIP
443 bool "Freescale MXS GPIO support" if COMPILE_TEST
444 depends on ARCH_MXS || COMPILE_TEST
445 default y if ARCH_MXS
447 select GENERIC_IRQ_CHIP
450 tristate "Cavium OCTEON GPIO"
451 depends on CAVIUM_OCTEON_SOC
454 Say yes here to support the on-chip GPIO lines on the OCTEON
458 tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
459 default y if ARCH_OMAP
461 select GENERIC_IRQ_CHIP
462 select GPIOLIB_IRQCHIP
464 Say yes here to enable GPIO support for TI OMAP SoCs.
467 tristate "PrimeCell PL061 GPIO support"
470 select GPIOLIB_IRQCHIP
472 Say yes here to support the PrimeCell PL061 GPIO device
474 config GPIO_PMIC_EIC_SPRD
475 tristate "Spreadtrum PMIC EIC support"
476 depends on MFD_SC27XX_PMIC || COMPILE_TEST
478 select GPIOLIB_IRQCHIP
480 Say yes here to support Spreadtrum PMIC EIC device.
483 bool "PXA GPIO support"
484 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
486 Say yes here to support the PXA GPIO device
489 tristate "Renesas R-Car and RZ/G GPIO support"
490 depends on ARCH_RENESAS || COMPILE_TEST
491 select GPIOLIB_IRQCHIP
493 Say yes here to support GPIO on Renesas R-Car or RZ/G SoCs.
496 bool "RDA Micro GPIO controller support"
497 depends on ARCH_RDA || COMPILE_TEST
500 select GPIOLIB_IRQCHIP
502 Say Y here to support RDA Micro GPIO controller.
504 config GPIO_REALTEK_OTTO
505 tristate "Realtek Otto GPIO support"
506 depends on MACH_REALTEK_RTL
507 default MACH_REALTEK_RTL
509 select GPIOLIB_IRQCHIP
511 The GPIO controller on the Otto MIPS platform supports up to two
512 banks of 32 GPIOs, with edge triggered interrupts. The 32 GPIOs
513 are grouped in four 8-bit wide ports.
515 When built as a module, the module will be called realtek_otto_gpio.
520 A 32-bit single register GPIO fixed in/out implementation. This
521 can be used to represent any register as a set of GPIO signals.
523 config GPIO_SAMA5D2_PIOBU
524 tristate "SAMA5D2 PIOBU GPIO support"
525 depends on MFD_SYSCON
529 Say yes here to use the PIOBU pins as GPIOs.
531 PIOBU pins on the SAMA5D2 can be used as GPIOs.
532 The difference from regular GPIOs is that they
533 maintain their value during backup/self-refresh.
536 bool "SiFive GPIO support"
538 select IRQ_DOMAIN_HIERARCHY
540 select GPIOLIB_IRQCHIP
543 Say yes here to support the GPIO device on SiFive SoCs.
546 tristate "SIOX GPIO support"
548 select GPIOLIB_IRQCHIP
550 Say yes here to support SIOX I/O devices. These are units connected
551 via a SIOX bus and have a number of fixed-direction I/O lines.
553 config GPIO_SNPS_CREG
554 bool "Synopsys GPIO via CREG (Control REGisters) driver"
555 depends on ARC || COMPILE_TEST
558 This driver supports GPIOs via CREG on various Synopsys SoCs.
559 This is a single-register MMIO GPIO driver for complex cases
560 where only several fields in register belong to GPIO lines and
561 each GPIO line owns a field with different length and on/off value.
563 config GPIO_SPEAR_SPICS
564 bool "ST SPEAr13xx SPI Chip Select as GPIO support"
565 depends on PLAT_SPEAR
566 select GENERIC_IRQ_CHIP
568 Say yes here to support ST SPEAr SPI Chip Select as GPIO device
571 tristate "Spreadtrum GPIO support"
572 depends on ARCH_SPRD || COMPILE_TEST
574 select GPIOLIB_IRQCHIP
576 Say yes here to support Spreadtrum GPIO device.
579 bool "STA2x11/ConneXt GPIO support"
580 depends on MFD_STA2X11
581 select GENERIC_IRQ_CHIP
583 Say yes here to support the STA2x11/ConneXt GPIO device.
584 The GPIO module has 128 GPIO pins with alternate functions.
587 bool "XWAY STP GPIOs"
588 depends on SOC_XWAY || COMPILE_TEST
591 This enables support for the Serial To Parallel (STP) unit found on
592 XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
593 that can be up to 24 bit. This peripheral is aimed at driving leds.
594 Some of the gpios/leds can be auto updated by the soc with dsl and
598 tristate "GPIO based on SYSCON"
599 depends on MFD_SYSCON && OF
601 Say yes here to support GPIO functionality though SYSCON driver.
606 select GENERIC_IRQ_CHIP
610 tristate "NVIDIA Tegra GPIO support"
612 depends on ARCH_TEGRA || COMPILE_TEST
614 select GPIOLIB_IRQCHIP
615 select IRQ_DOMAIN_HIERARCHY
617 Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
620 tristate "NVIDIA Tegra186 GPIO support"
621 default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC
622 depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || COMPILE_TEST
624 select GPIOLIB_IRQCHIP
625 select IRQ_DOMAIN_HIERARCHY
627 Say yes here to support GPIO pins on NVIDIA Tegra186 SoCs.
630 tristate "TS-4800 DIO blocks and compatibles"
632 depends on SOC_IMX51 || COMPILE_TEST
635 This driver support TS-4800 FPGA GPIO controllers.
638 tristate "Cavium ThunderX/OCTEON-TX GPIO"
639 depends on ARCH_THUNDER || (64BIT && COMPILE_TEST)
641 select GPIOLIB_IRQCHIP
642 select IRQ_DOMAIN_HIERARCHY
643 select IRQ_FASTEOI_HIERARCHY_HANDLERS
645 Say yes here to support the on-chip GPIO lines on the ThunderX
646 and OCTEON-TX families of SoCs.
649 tristate "UniPhier GPIO support"
650 depends on ARCH_UNIPHIER || COMPILE_TEST
652 select IRQ_DOMAIN_HIERARCHY
654 Say yes here to support UniPhier GPIOs.
658 depends on ARCH_MXC && SOC_VF610
659 select GPIOLIB_IRQCHIP
661 Say yes here to support Vybrid vf610 GPIOs.
664 tristate "Toshiba Visconti GPIO support"
665 depends on ARCH_VISCONTI || COMPILE_TEST
667 select GPIOLIB_IRQCHIP
669 select IRQ_DOMAIN_HIERARCHY
671 Say yes here to support GPIO on Tohisba Visconti.
674 tristate "NEC VR4100 series General-purpose I/O Uint support"
675 depends on CPU_VR41XX
677 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
680 tristate "VIA VX855/VX875 GPIO"
681 depends on (X86 || COMPILE_TEST) && PCI
685 Support access to the VX855/VX875 GPIO lines through the gpio library.
687 This driver provides common support for accessing the device,
688 additional drivers must be enabled in order to use the
689 functionality of the device.
692 tristate "Qualcomm Technologies Inc WCD9340/WCD9341 gpio controller driver"
693 depends on MFD_WCD934X && OF_GPIO
695 This driver is to support GPIO block found on the Qualcomm Technologies
696 Inc WCD9340/WCD9341 Audio Codec.
699 bool "APM X-Gene GPIO controller support"
700 depends on ARM64 && OF_GPIO
702 This driver is to support the GPIO block within the APM X-Gene SoC
703 platform's generic flash controller. The GPIO pins are muxed with
704 the generic flash controller's address and data pins. Say yes
705 here to enable the GFC GPIO functionality.
708 tristate "APM X-Gene GPIO standby controller support"
709 depends on (ARCH_XGENE || COMPILE_TEST)
711 select GPIOLIB_IRQCHIP
712 select IRQ_DOMAIN_HIERARCHY
714 This driver supports the GPIO block within the APM X-Gene
715 Standby Domain. Say yes here to enable the GPIO functionality.
718 tristate "Xilinx GPIO support"
719 select GPIOLIB_IRQCHIP
722 Say yes here to support the Xilinx FPGA GPIO device
725 tristate "Netlogic XLP GPIO support"
726 depends on OF_GPIO && (CPU_XLP || ARCH_THUNDER2 || COMPILE_TEST)
727 select GPIOLIB_IRQCHIP
729 This driver provides support for GPIO interface on Netlogic XLP MIPS64
730 SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
731 XLP9XX and XLP5XX. The same GPIO controller block is also present in
732 Cavium's ThunderX2 CN99XX SoCs.
737 bool "Xtensa GPIO32 support"
739 depends on HAVE_XTENSA_GPIO32
742 Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
743 and EXPSTATE (output) ports
746 bool "LSI ZEVIO SoC memory mapped GPIOs"
747 depends on ARM && OF_GPIO
749 Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
752 tristate "Xilinx Zynq GPIO support"
753 depends on ARCH_ZYNQ || ARCH_ZYNQMP
754 select GPIOLIB_IRQCHIP
756 Say yes here to support Xilinx Zynq GPIO controller.
758 config GPIO_LOONGSON1
759 tristate "Loongson1 GPIO support"
760 depends on MACH_LOONGSON32
763 Say Y or M here to support GPIO on Loongson1 SoCs.
766 tristate "GPIO support for AMD Fusion Controller Hub (G-series SOCs)"
768 This option enables driver for GPIO on AMDs Fusion Controller Hub,
769 as found on G-series SOCs (eg. GX-412TC)
771 Note: This driver doesn't registers itself automatically, as it
772 needs to be provided with platform specific configuration.
773 (See eg. CONFIG_PCENGINES_APU2.)
776 bool "MStar MSC313 GPIO support"
777 depends on ARCH_MSTARV7
779 select GPIOLIB_IRQCHIP
780 select IRQ_DOMAIN_HIERARCHY
782 Say Y here to support the main GPIO block on MStar/SigmaStar
786 tristate "IDT 79RC3243X GPIO support"
787 depends on MIKROTIK_RB532 || COMPILE_TEST
789 select GPIOLIB_IRQCHIP
791 Select this option to enable GPIO driver for
792 IDT 79RC3243X based devices like Mikrotik RB532.
794 To compile this driver as a module, choose M here: the module will
795 be called gpio-idt3243x.
799 menu "Port-mapped I/O GPIO drivers"
800 depends on X86 # Unconditional I/O space access
802 config GPIO_104_DIO_48E
803 tristate "ACCES 104-DIO-48E GPIO support"
806 select GPIOLIB_IRQCHIP
808 Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
809 104-DIO-24E). The base port addresses for the devices may be
810 configured via the base module parameter. The interrupt line numbers
811 for the devices may be configured via the irq module parameter.
813 config GPIO_104_IDIO_16
814 tristate "ACCES 104-IDIO-16 GPIO support"
817 select GPIOLIB_IRQCHIP
819 Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
820 104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
821 base port addresses for the devices may be configured via the base
822 module parameter. The interrupt line numbers for the devices may be
823 configured via the irq module parameter.
825 config GPIO_104_IDI_48
826 tristate "ACCES 104-IDI-48 GPIO support"
829 select GPIOLIB_IRQCHIP
831 Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
832 104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
833 the devices may be configured via the base module parameter. The
834 interrupt line numbers for the devices may be configured via the irq
838 tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support"
840 This option enables support for GPIOs found on Fintek Super-I/O
841 chips F71869, F71869A, F71882FG, F71889F and F81866.
843 To compile this driver as a module, choose M here: the module will
844 be called f7188x-gpio.
847 tristate "Diamond Systems GPIO-MM GPIO support"
851 Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
853 The Diamond Systems GPIO-MM device features 48 lines of digital I/O
854 via the emulation of dual 82C55A PPI chips. This driver provides GPIO
855 support for these 48 channels of digital I/O.
857 The base port addresses for the devices may be configured via the base
858 array module parameter.
861 tristate "IT87xx GPIO support"
863 Say yes here to support GPIO functionality of IT87xx Super I/O chips.
865 This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
866 supports the IT8761E, IT8613, IT8620E, and IT8628E Super I/O chips as
869 To compile this driver as a module, choose M here: the module will
873 tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
874 depends on (X86 || COMPILE_TEST) && ACPI
876 select GPIOLIB_IRQCHIP
878 Say yes here to support GPIO interface on Intel Poulsbo SCH,
879 Intel Tunnel Creek processor, Intel Centerton processor or
880 Intel Quark X1000 SoC.
882 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
883 powered by the core power rail and are turned off during sleep
884 modes (S3 and higher). The remaining four GPIOs are powered by
885 the Intel SCH suspend power supply. These GPIOs remain
886 active during S3. The suspend powered GPIOs can be used to wake the
887 system from the Suspend-to-RAM state.
889 The Intel Tunnel Creek processor has 5 GPIOs powered by the
890 core power rail and 9 from suspend power supply.
892 The Intel Centerton processor has a total of 30 GPIO pins.
893 Twenty-one are powered by the core power rail and 9 from the
894 suspend power supply.
896 The Intel Quark X1000 SoC has 2 GPIOs powered by the core
897 power well and 6 from the suspend power well.
900 tristate "SMSC SCH311x SuperI/O GPIO"
902 Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
903 SCH3116 "Super I/O" chipsets.
905 To compile this driver as a module, choose M here: the module will
906 be called gpio-sch311x.
909 tristate "TS-5500 DIO blocks and compatibles"
910 depends on TS5500 || COMPILE_TEST
912 This driver supports Digital I/O exposed by pin blocks found on some
913 Technologic Systems platforms. It includes, but is not limited to, 3
914 blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
918 tristate "Winbond Super I/O GPIO support"
921 This option enables support for GPIOs found on Winbond Super I/O
923 Currently, only W83627UHG (also known as Nuvoton NCT6627UD) is
926 You will need to provide a module parameter "gpios", or a
927 boot-time parameter "gpio_winbond.gpios" with a bitmask of GPIO
928 ports to enable (bit 0 is GPIO1, bit 1 is GPIO2, etc.).
930 To compile this driver as a module, choose M here: the module will
931 be called gpio-winbond.
934 tristate "WinSystems WS16C48 GPIO support"
936 select GPIOLIB_IRQCHIP
938 Enables GPIO support for the WinSystems WS16C48. The base port
939 addresses for the devices may be configured via the base module
940 parameter. The interrupt line numbers for the devices may be
941 configured via the irq module parameter.
945 menu "I2C GPIO expanders"
949 tristate "ADP5588 I2C GPIO expander"
951 This option enables support for 18 GPIOs found
952 on Analog Devices ADP5588 GPIO Expanders.
954 config GPIO_ADP5588_IRQ
955 bool "Interrupt controller support for ADP5588"
956 depends on GPIO_ADP5588=y
957 select GPIOLIB_IRQCHIP
959 Say yes here to enable the adp5588 to be used as an interrupt
960 controller. It requires the driver to be built in the kernel.
963 tristate "Avionic Design N-bit GPIO expander"
965 select GPIOLIB_IRQCHIP
967 This option enables support for N GPIOs found on Avionic Design
968 I2C GPIO expanders. The register space will be extended by powers
969 of two, so the controller will need to accommodate for that. For
970 example: if a controller provides 48 pins, 6 registers will be
971 enough to represent all pins, but the driver will assume a
972 register layout for 64 pins (8 registers).
975 tristate "Gateworks PLD GPIO Expander"
978 Say yes here to provide access to the Gateworks I2C PLD GPIO
979 Expander. This is used at least on the Cambria GW2358-4.
982 tristate "Maxim MAX7300 GPIO expander"
985 GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
988 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
990 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
991 Port Expanders. Each IO port on these chips has a fixed role of
992 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
993 Input and Output (designed by 'P'). The combinations are listed
996 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
997 max7322 (4I4O), max7323 (4P4O)
999 16 bits: max7324 (8I8O), max7325 (8P8O),
1000 max7326 (4I12O), max7327 (4P12O)
1002 Board setup code must specify the model to use, and the start
1003 number for these GPIOs.
1005 config GPIO_MAX732X_IRQ
1006 bool "Interrupt controller support for MAX732x"
1007 depends on GPIO_MAX732X=y
1008 select GPIOLIB_IRQCHIP
1010 Say yes here to enable the max732x to be used as an interrupt
1011 controller. It requires the driver to be built in the kernel.
1013 config GPIO_MC9S08DZ60
1014 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
1015 depends on I2C=y && MACH_MX35_3DS
1017 Select this to enable the MC9S08DZ60 GPIO driver
1020 tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
1023 Say yes here to provide access to several register-oriented
1024 SMBus I/O expanders, made mostly by NXP or TI. Compatible
1027 4 bits: pca9536, pca9537
1029 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554,
1030 pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
1032 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
1037 40 bits: pca9505, pca9698
1039 config GPIO_PCA953X_IRQ
1040 bool "Interrupt controller support for PCA953x"
1041 depends on GPIO_PCA953X
1042 select GPIOLIB_IRQCHIP
1044 Say yes here to enable the pca953x to be used as an interrupt
1045 controller. It requires the driver to be built in the kernel.
1048 tristate "PCA9570 4-Bit I2C GPO expander"
1050 Say yes here to enable the GPO driver for the NXP PCA9570 chip.
1052 To compile this driver as a module, choose M here: the module will
1053 be called gpio-pca9570.
1056 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
1057 select GPIOLIB_IRQCHIP
1060 Say yes here to provide access to most "quasi-bidirectional" I2C
1061 GPIO expanders used for additional digital outputs or inputs.
1062 Most of these parts are from NXP, though TI is a second source for
1063 some of them. Compatible models include:
1065 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
1066 pca9670, pca9672, pca9674, pca9674a,
1069 16 bits: pcf8575, pcf8575c, pca8575,
1070 pca9671, pca9673, pca9675
1072 Your board setup code will need to declare the expanders in
1073 use, and assign numbers to the GPIOs they expose. Those GPIOs
1074 can then be used from drivers and other kernel code, just like
1075 other GPIOs, but only accessible from task contexts.
1077 This driver provides an in-kernel interface to those GPIOs using
1078 platform-neutral GPIO calls.
1080 config GPIO_TPIC2810
1081 tristate "TPIC2810 8-Bit I2C GPO expander"
1083 Say yes here to enable the GPO driver for the TI TPIC2810 chip.
1085 To compile this driver as a module, choose M here: the module will
1086 be called gpio-tpic2810.
1089 tristate "Technologic Systems FPGA I2C GPIO"
1090 depends on SOC_IMX6 || COMPILE_TEST
1093 Say yes here to enabled the GPIO driver for Technologic's FPGA core.
1094 Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
1098 menu "MFD GPIO expanders"
1101 tristate "GPIO Support for ADP5520 PMIC"
1102 depends on PMIC_ADP5520
1104 This option enables support for on-chip GPIO found
1105 on Analog Devices ADP5520 PMICs.
1107 config GPIO_ALTERA_A10SR
1108 tristate "Altera Arria10 System Resource GPIO"
1109 depends on MFD_ALTERA_A10SR
1111 Driver for Arria10 Development Kit GPIO expansion which
1112 includes reads of pushbuttons and DIP switches as well
1116 tristate "Wolfson Microelectronics Arizona class devices"
1117 depends on MFD_ARIZONA
1119 Support for GPIOs on Wolfson Arizona class devices.
1122 tristate "ROHM BD70528 GPIO support"
1123 depends on MFD_ROHM_BD70528
1125 Support for GPIOs on ROHM BD70528 PMIC. There are four GPIOs
1126 available on the ROHM PMIC in total. The GPIOs can also
1127 generate interrupts.
1129 This driver can also be built as a module. If so, the module
1130 will be called gpio-bd70528.
1133 tristate "ROHM BD71815 PMIC GPIO support"
1134 depends on MFD_ROHM_BD71828
1136 Support for GPO(s) on ROHM BD71815 PMIC. There are two GPOs
1137 available on the ROHM PMIC.
1139 This driver can also be built as a module. If so, the module
1140 will be called gpio-bd71815.
1143 tristate "ROHM BD71828 GPIO support"
1144 depends on MFD_ROHM_BD71828
1146 Support for GPIOs on ROHM BD71828 PMIC. There are three GPIOs
1147 available on the ROHM PMIC in total. The GPIOs are limited to
1148 outputs only and pins must be configured to GPIO outputs by
1149 OTP. Enable this only if you want to use these pins as outputs.
1151 This driver can also be built as a module. If so, the module
1152 will be called gpio-bd71828.
1154 config GPIO_BD9571MWV
1155 tristate "ROHM BD9571 GPIO support"
1156 depends on MFD_BD9571MWV
1158 Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
1159 available on the ROHM PMIC in total, both of which can also
1160 generate interrupts.
1162 This driver can also be built as a module. If so, the module
1163 will be called gpio-bd9571mwv.
1165 config GPIO_CRYSTAL_COVE
1166 tristate "GPIO support for Crystal Cove PMIC"
1167 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
1168 select GPIOLIB_IRQCHIP
1170 Support for GPIO pins on Crystal Cove PMIC.
1172 Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
1175 This driver can also be built as a module. If so, the module will be
1176 called gpio-crystalcove.
1179 tristate "AMD CS5535/CS5536 GPIO support"
1180 depends on X86 || MIPS || COMPILE_TEST
1181 depends on MFD_CS5535
1183 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
1184 can be used for quite a number of things. The CS5535/6 is found on
1185 AMD Geode and Lemote Yeeloong devices.
1190 tristate "Dialog DA9052 GPIO"
1191 depends on PMIC_DA9052
1193 Say yes here to enable the GPIO driver for the DA9052 chip.
1196 tristate "Dialog Semiconductor DA9055 GPIO"
1197 depends on MFD_DA9055
1199 Say yes here to enable the GPIO driver for the DA9055 chip.
1201 The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
1202 be controller by this driver.
1204 If driver is built as a module it will be called gpio-da9055.
1207 tristate "Diolan DLN2 GPIO support"
1209 select GPIOLIB_IRQCHIP
1212 Select this option to enable GPIO driver for the Diolan DLN2
1215 This driver can also be built as a module. If so, the module
1216 will be called gpio-dln2.
1219 bool "HTC EGPIO support"
1222 This driver supports the CPLD egpio chip present on
1223 several HTC phones. It provides basic support for input
1224 pins, output pins, and irqs.
1226 config GPIO_JANZ_TTL
1227 tristate "Janz VMOD-TTL Digital IO Module"
1228 depends on MFD_JANZ_CMODIO
1230 This enables support for the Janz VMOD-TTL Digital IO module.
1231 This driver provides support for driving the pins in output
1232 mode only. Input mode is not supported.
1235 tristate "Kontron ETX / COMexpress GPIO"
1236 depends on MFD_KEMPLD
1238 This enables support for the PLD GPIO interface on some Kontron ETX
1239 and COMexpress (ETXexpress) modules.
1241 This driver can also be built as a module. If so, the module will be
1245 tristate "TI/National Semiconductor LP3943 GPIO expander"
1246 depends on MFD_LP3943
1248 GPIO driver for LP3943 MFD.
1249 LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
1250 Open drain outputs are required for this usage.
1253 tristate "TI LP873X GPO"
1254 depends on MFD_TI_LP873X
1256 This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
1259 This driver can also be built as a module. If so, the module will be
1263 tristate "TI LP87565 GPIO"
1264 depends on MFD_TI_LP87565
1266 This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
1269 This driver can also be built as a module. If so, the module will be
1270 called gpio-lp87565.
1273 tristate "Cirrus Logic Madera class codecs"
1274 depends on PINCTRL_MADERA
1276 Support for GPIOs on Cirrus Logic Madera class codecs.
1278 config GPIO_MAX77620
1279 tristate "GPIO support for PMIC MAX77620 and MAX20024"
1280 depends on MFD_MAX77620
1281 select GPIOLIB_IRQCHIP
1283 GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
1284 MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
1285 driver also provides interrupt support for each of the gpios.
1286 Say yes here to enable the max77620 to be used as gpio controller.
1288 config GPIO_MAX77650
1289 tristate "Maxim MAX77650/77651 GPIO support"
1290 depends on MFD_MAX77650
1292 GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
1293 These chips have a single pin that can be configured as GPIO.
1296 bool "TI PALMAS series PMICs GPIO"
1297 depends on MFD_PALMAS
1299 Select this option to enable GPIO driver for the TI PALMAS
1303 bool "RICOH RC5T583 GPIO"
1304 depends on MFD_RC5T583
1306 Select this option to enable GPIO driver for the Ricoh RC5T583
1308 This driver provides the support for driving/reading the gpio pins
1309 of RC5T583 device through standard gpio library.
1311 config GPIO_SL28CPLD
1312 tristate "Kontron sl28cpld GPIO support"
1313 depends on MFD_SL28CPLD || COMPILE_TEST
1315 select GPIOLIB_IRQCHIP
1318 This enables support for the GPIOs found on the Kontron sl28 CPLD.
1320 This driver can also be built as a module. If so, the module will be
1321 called gpio-sl28cpld.
1325 depends on MFD_STMPE
1327 select GPIOLIB_IRQCHIP
1329 This enables support for the GPIOs found on the STMPE I/O
1333 bool "TC3589X GPIOs"
1334 depends on MFD_TC3589X
1336 select GPIOLIB_IRQCHIP
1338 This enables support for the GPIOs found on the TC3589X
1341 config GPIO_TIMBERDALE
1342 bool "Support for timberdale GPIO IP"
1343 depends on MFD_TIMBERDALE
1345 Add support for the GPIO IP in the timberdale FPGA.
1347 config GPIO_TPS65086
1348 tristate "TI TPS65086 GPO"
1349 depends on MFD_TPS65086
1351 This driver supports the GPO on TI TPS65086x PMICs.
1353 config GPIO_TPS65218
1354 tristate "TPS65218 GPIO"
1355 depends on MFD_TPS65218
1357 Select this option to enable GPIO driver for the TPS65218
1360 config GPIO_TPS6586X
1361 bool "TPS6586X GPIO"
1362 depends on MFD_TPS6586X
1364 Select this option to enable GPIO driver for the TPS6586X
1367 config GPIO_TPS65910
1368 bool "TPS65910 GPIO"
1369 depends on MFD_TPS65910
1371 Select this option to enable GPIO driver for the TPS65910
1374 config GPIO_TPS65912
1375 tristate "TI TPS65912 GPIO"
1376 depends on MFD_TPS65912
1378 This driver supports TPS65912 gpio chip
1380 config GPIO_TPS68470
1381 bool "TPS68470 GPIO"
1382 depends on INTEL_SKL_INT3472
1384 Select this option to enable GPIO driver for the TPS68470
1386 There are 7 GPIOs and few sensor related GPIOs supported
1387 by the TPS68470. While the 7 GPIOs can be configured as
1388 input or output as appropriate, the sensor related GPIOs
1389 are "output only" GPIOs.
1391 This driver config is bool, as the GPIO functionality
1392 of the TPS68470 must be available before dependent
1396 tristate "TQ-Systems QTMX86 GPIO"
1397 depends on MFD_TQMX86 || COMPILE_TEST
1398 depends on HAS_IOPORT_MAP
1399 select GPIOLIB_IRQCHIP
1401 This driver supports GPIO on the TQMX86 IO controller.
1404 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1405 depends on TWL4030_CORE
1407 Say yes here to access the GPIO signals of various multi-function
1408 power management chips from Texas Instruments.
1411 tristate "TWL6040 GPO"
1412 depends on TWL6040_CORE
1414 Say yes here to access the GPO signals of twl6040
1415 audio chip from Texas Instruments.
1418 tristate "Philips UCB1400 GPIO"
1419 depends on UCB1400_CORE
1421 This enables support for the Philips UCB1400 GPIO pins.
1422 The UCB1400 is an AC97 audio codec.
1424 config GPIO_WHISKEY_COVE
1425 tristate "GPIO support for Whiskey Cove PMIC"
1426 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1427 select GPIOLIB_IRQCHIP
1429 Support for GPIO pins on Whiskey Cove PMIC.
1431 Say Yes if you have a Intel SoC based tablet with Whiskey Cove PMIC
1434 This driver can also be built as a module. If so, the module will be
1438 tristate "WM831x GPIOs"
1439 depends on MFD_WM831X
1441 Say yes here to access the GPIO signals of WM831x power management
1442 chips from Wolfson Microelectronics.
1445 tristate "WM8350 GPIOs"
1446 depends on MFD_WM8350
1448 Say yes here to access the GPIO signals of WM8350 power management
1449 chips from Wolfson Microelectronics.
1452 tristate "WM8994 GPIOs"
1453 depends on MFD_WM8994
1455 Say yes here to access the GPIO signals of WM8994 audio hub
1456 CODECs from Wolfson Microelectronics.
1460 menu "PCI GPIO expanders"
1464 tristate "AMD 8111 GPIO driver"
1465 depends on X86 || COMPILE_TEST
1466 depends on HAS_IOPORT_MAP
1468 The AMD 8111 south bridge contains 32 GPIO pins which can be used.
1470 Note, that usually system firmware/ACPI handles GPIO pins on their
1471 own and users might easily break their systems with uncarefull usage
1477 tristate "BT8XX GPIO abuser"
1478 depends on VIDEO_BT848=n
1480 The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1481 as a cheap PCI GPIO card.
1483 This chip can be found on Miro, Hauppauge and STB TV-cards.
1485 The card needs to be physically altered for using it as a
1486 GPIO card. For more information on how to build a GPIO card
1487 from a BT8xx TV card, see the documentation file at
1488 Documentation/driver-api/gpio/bt8xxgpio.rst
1492 config GPIO_MERRIFIELD
1493 tristate "Intel Merrifield GPIO support"
1494 depends on X86_INTEL_MID
1495 select GPIOLIB_IRQCHIP
1497 Say Y here to support Intel Merrifield GPIO.
1500 tristate "Mellanox BlueField SoC GPIO"
1501 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1504 Say Y here if you want GPIO support on Mellanox BlueField SoC.
1507 tristate "Mellanox BlueField 2 SoC GPIO"
1508 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1511 Say Y here if you want GPIO support on Mellanox BlueField 2 SoC.
1514 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1515 depends on X86 || COMPILE_TEST
1516 select GENERIC_IRQ_CHIP
1518 ML7213 is companion chip for Intel Atom E6xx series.
1519 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
1520 Hub) which is for IVI(In-Vehicle Infotainment) use.
1521 This driver can access the IOH's GPIO device.
1524 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
1525 depends on X86_32 || MIPS || COMPILE_TEST
1526 select GENERIC_IRQ_CHIP
1528 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
1529 which is an IOH(Input/Output Hub) for x86 embedded processor.
1530 This driver can access PCH GPIO device.
1532 This driver also can be used for LAPIS Semiconductor IOH(Input/
1533 Output Hub), ML7223 and ML7831.
1534 ML7223 IOH is for MP(Media Phone) use.
1535 ML7831 IOH is for general purpose use.
1536 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1537 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1539 config GPIO_PCI_IDIO_16
1540 tristate "ACCES PCI-IDIO-16 GPIO support"
1541 select GPIOLIB_IRQCHIP
1543 Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1544 generated when any of the inputs change state (low to high or high to
1545 low). Input filter control is not supported by this driver, and the
1546 input filters are deactivated by this driver.
1548 config GPIO_PCIE_IDIO_24
1549 tristate "ACCES PCIe-IDIO-24 GPIO support"
1550 select GPIOLIB_IRQCHIP
1552 Enables GPIO support for the ACCES PCIe-IDIO-24 family (PCIe-IDIO-24,
1553 PCIe-IDI-24, PCIe-IDO-24, PCIe-IDIO-12). An interrupt is generated
1554 when any of the inputs change state (low to high or high to low).
1555 Input filter control is not supported by this driver, and the input
1556 filters are deactivated by this driver.
1559 tristate "RDC R-321x GPIO support"
1563 Support for the RDC R321x SoC GPIOs over southbridge
1564 PCI configuration space.
1566 config GPIO_SODAVILLE
1567 bool "Intel Sodaville GPIO support"
1568 depends on X86 && OF
1570 select GENERIC_IRQ_CHIP
1572 Say Y here to support Intel Sodaville GPIO.
1576 menu "SPI GPIO expanders"
1577 depends on SPI_MASTER
1580 tristate "74x164 serial-in/parallel-out 8-bits shift register"
1583 Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1584 shift registers. This driver can be used to provide access
1585 to more gpio outputs.
1587 config GPIO_MAX3191X
1588 tristate "Maxim MAX3191x industrial serializer"
1591 GPIO driver for Maxim MAX31910, MAX31911, MAX31912, MAX31913,
1592 MAX31953 and MAX31963 industrial serializer, a daisy-chainable
1593 chip to make 8 digital 24V inputs available via SPI. Supports
1594 CRC checksums to guard against electromagnetic interference,
1595 as well as undervoltage and overtemperature detection.
1598 tristate "Maxim MAX7301 GPIO expander"
1601 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1604 tristate "Freescale MC33880 high-side/low-side switch"
1606 SPI driver for Freescale MC33880 high-side/low-side switch.
1607 This provides GPIO interface supporting inputs and outputs.
1610 tristate "Generic parallel-in/serial-out shift register"
1612 GPIO driver for SPI compatible parallel-in/serial-out shift
1613 registers. These are input only devices.
1616 tristate "EXAR XRA1403 16-bit GPIO expander"
1619 GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1622 tristate "Turris Mox Moxtet bus GPIO expander"
1625 Say yes here if you are building for the Turris Mox router.
1626 This is the driver needed for configuring the GPIOs via the Moxtet
1627 bus. For example the Mox module with SFP cage needs this driver
1628 so that phylink can use corresponding GPIOs.
1632 menu "USB GPIO expanders"
1635 config GPIO_VIPERBOARD
1636 tristate "Viperboard GPIO a & b support"
1637 depends on MFD_VIPERBOARD
1639 Say yes here to access the GPIO signals of Nano River
1640 Technologies Viperboard. There are two GPIO chips on the
1641 board: gpioa and gpiob.
1642 See viperboard API specification and Nano
1643 River Tech's viperboard.h for detailed meaning
1644 of the module parameters.
1648 menu "Virtual GPIO drivers"
1650 config GPIO_AGGREGATOR
1651 tristate "GPIO Aggregator"
1653 Say yes here to enable the GPIO Aggregator, which provides a way to
1654 aggregate existing GPIO lines into a new virtual GPIO chip.
1655 This can serve the following purposes:
1656 - Assign permissions for a collection of GPIO lines to a user,
1657 - Export a collection of GPIO lines to a virtual machine,
1658 - Provide a generic driver for a GPIO-operated device in an
1659 industrial control context, to be operated from userspace using
1660 the GPIO chardev interface.
1663 tristate "GPIO Testing Driver"
1666 This enables GPIO Testing driver, which provides a way to test GPIO
1667 subsystem through sysfs (or char device) and debugfs.
1668 User could use it through the script in
1669 tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in