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 bool "Broadcom Virt GPIO"
199 depends on OF_GPIO && RASPBERRYPI_FIRMWARE && (ARCH_BCM2835 || COMPILE_TEST)
201 Turn on virtual GPIO support for Broadcom BCM283X chips.
204 tristate "BRCMSTB GPIO support"
205 default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
206 depends on OF_GPIO && (ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST)
210 Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
213 tristate "Cadence GPIO support"
216 select GPIOLIB_IRQCHIP
218 Say yes here to enable support for Cadence GPIO controller.
221 tristate "CLPS711X GPIO support"
222 depends on ARCH_CLPS711X || COMPILE_TEST
225 Say yes here to support GPIO on CLPS711X SoCs.
228 bool "TI Davinci/Keystone GPIO support"
229 default y if ARCH_DAVINCI
230 depends on (ARM || ARM64) && (ARCH_DAVINCI || ARCH_KEYSTONE || ARCH_K3)
232 Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
235 tristate "Synopsys DesignWare APB GPIO driver"
237 select GPIOLIB_IRQCHIP
239 Say Y or M here to build support for the Synopsys DesignWare APB
243 tristate "Spreadtrum EIC support"
244 depends on ARCH_SPRD || COMPILE_TEST
246 select GPIOLIB_IRQCHIP
248 Say yes here to support Spreadtrum EIC device.
251 tristate "Emma Mobile GPIO"
252 depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
254 Say yes here to support GPIO on Renesas Emma Mobile SoCs.
258 depends on ARCH_EP93XX
260 select GPIOLIB_IRQCHIP
263 tristate "Support for GPIO pins on XR17V352/354/358"
264 depends on SERIAL_8250_EXAR
267 Selecting this option will enable handling of GPIO pins present
268 on Exar XR17V352/354/358 chips.
271 bool "GE FPGA based GPIO"
275 Support for common GPIO functionality provided on some GE Single Board
278 This driver provides basic support (configure as input or output, read
279 and write pin state) for GPIO implemented in a number of GE single
282 config GPIO_FTGPIO010
283 bool "Faraday FTGPIO010 GPIO"
286 select GPIOLIB_IRQCHIP
287 default (ARCH_GEMINI || ARCH_MOXART)
289 Support for common GPIOs from the Faraday FTGPIO010 IP core, found in
290 Cortina systems Gemini platforms, Moxa ART and others.
292 config GPIO_GENERIC_PLATFORM
293 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
296 Say yes here to support basic platform_device memory-mapped GPIO controllers.
299 tristate "Aeroflex Gaisler GRGPIO support"
304 Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
305 VHDL IP core library.
308 tristate "HiSilicon GPIO controller driver"
309 depends on (ARM64 && ACPI) || COMPILE_TEST
311 select GPIOLIB_IRQCHIP
313 Say Y or M here to build support for the HiSilicon GPIO controller
315 This GPIO controller support double-edge interrupt and multi-core
319 tristate "Nintendo Wii (Hollywood) GPIO"
322 select GPIOLIB_IRQCHIP
324 Select this to support the GPIO controller of the Nintendo Wii.
329 tristate "Intel ICH GPIO"
333 Say yes here to support the GPIO functionality of a number of Intel
334 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
335 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
336 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
341 tristate "Intel IOP GPIO"
342 depends on ARCH_IOP32X || COMPILE_TEST
345 Say yes here to support the GPIO functionality of a number of Intel
351 bool "Intel IXP4xx GPIO"
352 depends on ARM # For <asm/mach-types.h>
353 depends on ARCH_IXP4XX
355 select GPIOLIB_IRQCHIP
356 select IRQ_DOMAIN_HIERARCHY
358 Say yes here to support the GPIO functionality of a number of Intel
359 IXP4xx series of chips.
363 tristate "Xylon LogiCVC GPIO support"
364 depends on MFD_SYSCON && OF
366 Say yes here to support GPIO functionality of the Xylon LogiCVC
367 programmable logic block.
370 bool "Loongson-2/3 GPIO support"
371 depends on CPU_LOONGSON2EF || CPU_LOONGSON64
373 driver for GPIO functionality on Loongson-2F/3A/3B processors.
376 tristate "NXP LPC18XX/43XX GPIO support"
377 default y if ARCH_LPC18XX
378 depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
379 select IRQ_DOMAIN_HIERARCHY
381 Select this option to enable GPIO driver for
382 NXP LPC18XX/43XX devices.
385 tristate "NXP LPC32XX GPIO support"
386 depends on OF_GPIO && (ARCH_LPC32XX || COMPILE_TEST)
388 Select this option to enable GPIO driver for
392 tristate "GPIO support for Fujitsu MB86S7x Platforms"
394 Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
397 tristate "MEN 16Z127 GPIO support"
401 Say yes here to support the MEN 16Z127 GPIO Controller
403 config GPIO_MM_LANTIQ
404 bool "Lantiq Memory mapped GPIOs"
405 depends on LANTIQ && SOC_XWAY
407 This enables support for memory mapped GPIOs on the External Bus Unit
408 (EBU) found on Lantiq SoCs. The gpios are output only as they are
409 created by attaching a 16bit latch to the bus.
413 depends on PPC_MPC52xx
416 bool "MPC512x/MPC8xxx/QorIQ GPIO support"
417 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
418 FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
423 Say Y here if you're going to use hardware that connects to the
424 MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
427 bool "Mediatek MT7621 GPIO Support"
428 depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
431 select GPIOLIB_IRQCHIP
433 Say yes here to support the Mediatek MT7621 SoC GPIO device
437 depends on PLAT_ORION || ARCH_MVEBU
439 select GENERIC_IRQ_CHIP
443 tristate "i.MX GPIO support"
444 depends on ARCH_MXC || COMPILE_TEST
446 select GENERIC_IRQ_CHIP
449 bool "Freescale MXS GPIO support" if COMPILE_TEST
450 depends on ARCH_MXS || COMPILE_TEST
451 default y if ARCH_MXS
453 select GENERIC_IRQ_CHIP
456 tristate "Cavium OCTEON GPIO"
457 depends on CAVIUM_OCTEON_SOC
460 Say yes here to support the on-chip GPIO lines on the OCTEON
464 tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
465 default y if ARCH_OMAP
467 select GENERIC_IRQ_CHIP
468 select GPIOLIB_IRQCHIP
470 Say yes here to enable GPIO support for TI OMAP SoCs.
473 tristate "PrimeCell PL061 GPIO support"
476 select GPIOLIB_IRQCHIP
478 Say yes here to support the PrimeCell PL061 GPIO device
480 config GPIO_PMIC_EIC_SPRD
481 tristate "Spreadtrum PMIC EIC support"
482 depends on MFD_SC27XX_PMIC || COMPILE_TEST
484 select GPIOLIB_IRQCHIP
486 Say yes here to support Spreadtrum PMIC EIC device.
489 tristate "PWM chip GPIO"
493 Turn on support for exposing a PWM chip as a GPIO
497 bool "PXA GPIO support"
498 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
500 Say yes here to support the PXA GPIO device
503 tristate "Renesas R-Car and RZ/G GPIO support"
504 depends on ARCH_RENESAS || COMPILE_TEST
505 select GPIOLIB_IRQCHIP
507 Say yes here to support GPIO on Renesas R-Car or RZ/G SoCs.
510 bool "RDA Micro GPIO controller support"
511 depends on ARCH_RDA || COMPILE_TEST
514 select GPIOLIB_IRQCHIP
516 Say Y here to support RDA Micro GPIO controller.
518 config GPIO_REALTEK_OTTO
519 tristate "Realtek Otto GPIO support"
520 depends on MACH_REALTEK_RTL
521 default MACH_REALTEK_RTL
523 select GPIOLIB_IRQCHIP
525 The GPIO controller on the Otto MIPS platform supports up to two
526 banks of 32 GPIOs, with edge triggered interrupts. The 32 GPIOs
527 are grouped in four 8-bit wide ports.
529 When built as a module, the module will be called realtek_otto_gpio.
534 A 32-bit single register GPIO fixed in/out implementation. This
535 can be used to represent any register as a set of GPIO signals.
538 tristate "Rockchip GPIO support"
539 depends on ARCH_ROCKCHIP || COMPILE_TEST
540 select GENERIC_IRQ_CHIP
541 select GPIOLIB_IRQCHIP
542 default ARCH_ROCKCHIP
544 Say yes here to support GPIO on Rockchip SoCs.
546 config GPIO_SAMA5D2_PIOBU
547 tristate "SAMA5D2 PIOBU GPIO support"
548 depends on MFD_SYSCON
552 Say yes here to use the PIOBU pins as GPIOs.
554 PIOBU pins on the SAMA5D2 can be used as GPIOs.
555 The difference from regular GPIOs is that they
556 maintain their value during backup/self-refresh.
559 bool "SiFive GPIO support"
561 select IRQ_DOMAIN_HIERARCHY
563 select GPIOLIB_IRQCHIP
566 Say yes here to support the GPIO device on SiFive SoCs.
569 tristate "SIOX GPIO support"
571 select GPIOLIB_IRQCHIP
573 Say yes here to support SIOX I/O devices. These are units connected
574 via a SIOX bus and have a number of fixed-direction I/O lines.
576 config GPIO_SNPS_CREG
577 bool "Synopsys GPIO via CREG (Control REGisters) driver"
578 depends on ARC || COMPILE_TEST
581 This driver supports GPIOs via CREG on various Synopsys SoCs.
582 This is a single-register MMIO GPIO driver for complex cases
583 where only several fields in register belong to GPIO lines and
584 each GPIO line owns a field with different length and on/off value.
586 config GPIO_SPEAR_SPICS
587 bool "ST SPEAr13xx SPI Chip Select as GPIO support"
588 depends on PLAT_SPEAR
589 select GENERIC_IRQ_CHIP
591 Say yes here to support ST SPEAr SPI Chip Select as GPIO device
594 tristate "Spreadtrum GPIO support"
595 depends on ARCH_SPRD || COMPILE_TEST
597 select GPIOLIB_IRQCHIP
599 Say yes here to support Spreadtrum GPIO device.
602 bool "STA2x11/ConneXt GPIO support"
603 depends on MFD_STA2X11
604 select GENERIC_IRQ_CHIP
606 Say yes here to support the STA2x11/ConneXt GPIO device.
607 The GPIO module has 128 GPIO pins with alternate functions.
610 bool "XWAY STP GPIOs"
611 depends on SOC_XWAY || COMPILE_TEST
614 This enables support for the Serial To Parallel (STP) unit found on
615 XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
616 that can be up to 24 bit. This peripheral is aimed at driving leds.
617 Some of the gpios/leds can be auto updated by the soc with dsl and
621 tristate "GPIO based on SYSCON"
622 depends on MFD_SYSCON && OF
624 Say yes here to support GPIO functionality though SYSCON driver.
629 select GENERIC_IRQ_CHIP
633 tristate "NVIDIA Tegra GPIO support"
635 depends on ARCH_TEGRA || COMPILE_TEST
637 select GPIOLIB_IRQCHIP
638 select IRQ_DOMAIN_HIERARCHY
640 Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
643 tristate "NVIDIA Tegra186 GPIO support"
644 default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC
645 depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || COMPILE_TEST
647 select GPIOLIB_IRQCHIP
648 select IRQ_DOMAIN_HIERARCHY
650 Say yes here to support GPIO pins on NVIDIA Tegra186 SoCs.
653 tristate "TS-4800 DIO blocks and compatibles"
655 depends on SOC_IMX51 || COMPILE_TEST
658 This driver support TS-4800 FPGA GPIO controllers.
661 tristate "Cavium ThunderX/OCTEON-TX GPIO"
662 depends on ARCH_THUNDER || (64BIT && COMPILE_TEST)
664 select GPIOLIB_IRQCHIP
665 select IRQ_DOMAIN_HIERARCHY
666 select IRQ_FASTEOI_HIERARCHY_HANDLERS
668 Say yes here to support the on-chip GPIO lines on the ThunderX
669 and OCTEON-TX families of SoCs.
672 tristate "UniPhier GPIO support"
673 depends on ARCH_UNIPHIER || COMPILE_TEST
675 select IRQ_DOMAIN_HIERARCHY
677 Say yes here to support UniPhier GPIOs.
681 depends on ARCH_MXC && SOC_VF610
682 select GPIOLIB_IRQCHIP
684 Say yes here to support Vybrid vf610 GPIOs.
687 tristate "Toshiba Visconti GPIO support"
688 depends on ARCH_VISCONTI || COMPILE_TEST
690 select GPIOLIB_IRQCHIP
692 select IRQ_DOMAIN_HIERARCHY
694 Say yes here to support GPIO on Tohisba Visconti.
697 tristate "NEC VR4100 series General-purpose I/O Uint support"
698 depends on CPU_VR41XX
700 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
703 tristate "VIA VX855/VX875 GPIO"
704 depends on (X86 || COMPILE_TEST) && PCI
708 Support access to the VX855/VX875 GPIO lines through the gpio library.
710 This driver provides common support for accessing the device,
711 additional drivers must be enabled in order to use the
712 functionality of the device.
715 tristate "Qualcomm Technologies Inc WCD9340/WCD9341 gpio controller driver"
716 depends on MFD_WCD934X && OF_GPIO
718 This driver is to support GPIO block found on the Qualcomm Technologies
719 Inc WCD9340/WCD9341 Audio Codec.
722 bool "APM X-Gene GPIO controller support"
723 depends on ARM64 && OF_GPIO
725 This driver is to support the GPIO block within the APM X-Gene SoC
726 platform's generic flash controller. The GPIO pins are muxed with
727 the generic flash controller's address and data pins. Say yes
728 here to enable the GFC GPIO functionality.
731 tristate "APM X-Gene GPIO standby controller support"
732 depends on (ARCH_XGENE || COMPILE_TEST)
734 select GPIOLIB_IRQCHIP
735 select IRQ_DOMAIN_HIERARCHY
737 This driver supports the GPIO block within the APM X-Gene
738 Standby Domain. Say yes here to enable the GPIO functionality.
741 tristate "Xilinx GPIO support"
742 select GPIOLIB_IRQCHIP
745 Say yes here to support the Xilinx FPGA GPIO device
748 tristate "Netlogic XLP GPIO support"
749 depends on OF_GPIO && (CPU_XLP || ARCH_THUNDER2 || COMPILE_TEST)
750 select GPIOLIB_IRQCHIP
752 This driver provides support for GPIO interface on Netlogic XLP MIPS64
753 SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
754 XLP9XX and XLP5XX. The same GPIO controller block is also present in
755 Cavium's ThunderX2 CN99XX SoCs.
760 bool "Xtensa GPIO32 support"
762 depends on HAVE_XTENSA_GPIO32
765 Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
766 and EXPSTATE (output) ports
769 bool "LSI ZEVIO SoC memory mapped GPIOs"
770 depends on ARM && OF_GPIO
772 Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
775 tristate "Xilinx Zynq GPIO support"
776 depends on ARCH_ZYNQ || ARCH_ZYNQMP
777 select GPIOLIB_IRQCHIP
779 Say yes here to support Xilinx Zynq GPIO controller.
781 config GPIO_LOONGSON1
782 tristate "Loongson1 GPIO support"
783 depends on MACH_LOONGSON32
786 Say Y or M here to support GPIO on Loongson1 SoCs.
789 tristate "GPIO support for AMD Fusion Controller Hub (G-series SOCs)"
791 This option enables driver for GPIO on AMDs Fusion Controller Hub,
792 as found on G-series SOCs (eg. GX-412TC)
794 Note: This driver doesn't registers itself automatically, as it
795 needs to be provided with platform specific configuration.
796 (See eg. CONFIG_PCENGINES_APU2.)
799 bool "MStar MSC313 GPIO support"
800 depends on ARCH_MSTARV7
802 select GPIOLIB_IRQCHIP
803 select IRQ_DOMAIN_HIERARCHY
805 Say Y here to support the main GPIO block on MStar/SigmaStar
809 tristate "IDT 79RC3243X GPIO support"
810 depends on MIKROTIK_RB532 || COMPILE_TEST
812 select GPIOLIB_IRQCHIP
814 Select this option to enable GPIO driver for
815 IDT 79RC3243X based devices like Mikrotik RB532.
817 To compile this driver as a module, choose M here: the module will
818 be called gpio-idt3243x.
822 menu "Port-mapped I/O GPIO drivers"
823 depends on X86 # Unconditional I/O space access
825 config GPIO_104_DIO_48E
826 tristate "ACCES 104-DIO-48E GPIO support"
829 select GPIOLIB_IRQCHIP
831 Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
832 104-DIO-24E). The base port addresses for the devices may be
833 configured via the base module parameter. The interrupt line numbers
834 for the devices may be configured via the irq module parameter.
836 config GPIO_104_IDIO_16
837 tristate "ACCES 104-IDIO-16 GPIO support"
840 select GPIOLIB_IRQCHIP
842 Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
843 104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
844 base port addresses for the devices may be configured via the base
845 module parameter. The interrupt line numbers for the devices may be
846 configured via the irq module parameter.
848 config GPIO_104_IDI_48
849 tristate "ACCES 104-IDI-48 GPIO support"
852 select GPIOLIB_IRQCHIP
854 Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
855 104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
856 the devices may be configured via the base module parameter. The
857 interrupt line numbers for the devices may be configured via the irq
861 tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support"
863 This option enables support for GPIOs found on Fintek Super-I/O
864 chips F71869, F71869A, F71882FG, F71889F and F81866.
866 To compile this driver as a module, choose M here: the module will
867 be called f7188x-gpio.
870 tristate "Diamond Systems GPIO-MM GPIO support"
874 Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
876 The Diamond Systems GPIO-MM device features 48 lines of digital I/O
877 via the emulation of dual 82C55A PPI chips. This driver provides GPIO
878 support for these 48 channels of digital I/O.
880 The base port addresses for the devices may be configured via the base
881 array module parameter.
884 tristate "IT87xx GPIO support"
886 Say yes here to support GPIO functionality of IT87xx Super I/O chips.
888 This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
889 supports the IT8761E, IT8613, IT8620E, and IT8628E Super I/O chips as
892 To compile this driver as a module, choose M here: the module will
896 tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
897 depends on (X86 || COMPILE_TEST) && ACPI
899 select GPIOLIB_IRQCHIP
901 Say yes here to support GPIO interface on Intel Poulsbo SCH,
902 Intel Tunnel Creek processor, Intel Centerton processor or
903 Intel Quark X1000 SoC.
905 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
906 powered by the core power rail and are turned off during sleep
907 modes (S3 and higher). The remaining four GPIOs are powered by
908 the Intel SCH suspend power supply. These GPIOs remain
909 active during S3. The suspend powered GPIOs can be used to wake the
910 system from the Suspend-to-RAM state.
912 The Intel Tunnel Creek processor has 5 GPIOs powered by the
913 core power rail and 9 from suspend power supply.
915 The Intel Centerton processor has a total of 30 GPIO pins.
916 Twenty-one are powered by the core power rail and 9 from the
917 suspend power supply.
919 The Intel Quark X1000 SoC has 2 GPIOs powered by the core
920 power well and 6 from the suspend power well.
923 tristate "SMSC SCH311x SuperI/O GPIO"
925 Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
926 SCH3116 "Super I/O" chipsets.
928 To compile this driver as a module, choose M here: the module will
929 be called gpio-sch311x.
932 tristate "TS-5500 DIO blocks and compatibles"
933 depends on TS5500 || COMPILE_TEST
935 This driver supports Digital I/O exposed by pin blocks found on some
936 Technologic Systems platforms. It includes, but is not limited to, 3
937 blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
941 tristate "Winbond Super I/O GPIO support"
944 This option enables support for GPIOs found on Winbond Super I/O
946 Currently, only W83627UHG (also known as Nuvoton NCT6627UD) is
949 You will need to provide a module parameter "gpios", or a
950 boot-time parameter "gpio_winbond.gpios" with a bitmask of GPIO
951 ports to enable (bit 0 is GPIO1, bit 1 is GPIO2, etc.).
953 To compile this driver as a module, choose M here: the module will
954 be called gpio-winbond.
957 tristate "WinSystems WS16C48 GPIO support"
959 select GPIOLIB_IRQCHIP
961 Enables GPIO support for the WinSystems WS16C48. The base port
962 addresses for the devices may be configured via the base module
963 parameter. The interrupt line numbers for the devices may be
964 configured via the irq module parameter.
968 menu "I2C GPIO expanders"
972 tristate "ADP5588 I2C GPIO expander"
974 This option enables support for 18 GPIOs found
975 on Analog Devices ADP5588 GPIO Expanders.
977 config GPIO_ADP5588_IRQ
978 bool "Interrupt controller support for ADP5588"
979 depends on GPIO_ADP5588=y
980 select GPIOLIB_IRQCHIP
982 Say yes here to enable the adp5588 to be used as an interrupt
983 controller. It requires the driver to be built in the kernel.
986 tristate "Avionic Design N-bit GPIO expander"
988 select GPIOLIB_IRQCHIP
990 This option enables support for N GPIOs found on Avionic Design
991 I2C GPIO expanders. The register space will be extended by powers
992 of two, so the controller will need to accommodate for that. For
993 example: if a controller provides 48 pins, 6 registers will be
994 enough to represent all pins, but the driver will assume a
995 register layout for 64 pins (8 registers).
998 tristate "Gateworks PLD GPIO Expander"
1001 Say yes here to provide access to the Gateworks I2C PLD GPIO
1002 Expander. This is used at least on the Cambria GW2358-4.
1005 tristate "Maxim MAX7300 GPIO expander"
1008 GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
1011 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
1013 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
1014 Port Expanders. Each IO port on these chips has a fixed role of
1015 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
1016 Input and Output (designed by 'P'). The combinations are listed
1019 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
1020 max7322 (4I4O), max7323 (4P4O)
1022 16 bits: max7324 (8I8O), max7325 (8P8O),
1023 max7326 (4I12O), max7327 (4P12O)
1025 Board setup code must specify the model to use, and the start
1026 number for these GPIOs.
1028 config GPIO_MAX732X_IRQ
1029 bool "Interrupt controller support for MAX732x"
1030 depends on GPIO_MAX732X=y
1031 select GPIOLIB_IRQCHIP
1033 Say yes here to enable the max732x to be used as an interrupt
1034 controller. It requires the driver to be built in the kernel.
1037 tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
1040 Say yes here to provide access to several register-oriented
1041 SMBus I/O expanders, made mostly by NXP or TI. Compatible
1044 4 bits: pca9536, pca9537
1046 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554,
1047 pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
1049 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
1054 40 bits: pca9505, pca9698
1056 config GPIO_PCA953X_IRQ
1057 bool "Interrupt controller support for PCA953x"
1058 depends on GPIO_PCA953X
1059 select GPIOLIB_IRQCHIP
1061 Say yes here to enable the pca953x to be used as an interrupt
1062 controller. It requires the driver to be built in the kernel.
1065 tristate "PCA9570 4-Bit I2C GPO expander"
1067 Say yes here to enable the GPO driver for the NXP PCA9570 chip.
1069 To compile this driver as a module, choose M here: the module will
1070 be called gpio-pca9570.
1073 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
1074 select GPIOLIB_IRQCHIP
1077 Say yes here to provide access to most "quasi-bidirectional" I2C
1078 GPIO expanders used for additional digital outputs or inputs.
1079 Most of these parts are from NXP, though TI is a second source for
1080 some of them. Compatible models include:
1082 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
1083 pca9670, pca9672, pca9674, pca9674a,
1086 16 bits: pcf8575, pcf8575c, pca8575,
1087 pca9671, pca9673, pca9675
1089 Your board setup code will need to declare the expanders in
1090 use, and assign numbers to the GPIOs they expose. Those GPIOs
1091 can then be used from drivers and other kernel code, just like
1092 other GPIOs, but only accessible from task contexts.
1094 This driver provides an in-kernel interface to those GPIOs using
1095 platform-neutral GPIO calls.
1097 config GPIO_TPIC2810
1098 tristate "TPIC2810 8-Bit I2C GPO expander"
1100 Say yes here to enable the GPO driver for the TI TPIC2810 chip.
1102 To compile this driver as a module, choose M here: the module will
1103 be called gpio-tpic2810.
1106 tristate "Technologic Systems FPGA I2C GPIO"
1107 depends on SOC_IMX6 || COMPILE_TEST
1110 Say yes here to enabled the GPIO driver for Technologic's FPGA core.
1111 Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
1115 menu "MFD GPIO expanders"
1118 tristate "GPIO Support for ADP5520 PMIC"
1119 depends on PMIC_ADP5520
1121 This option enables support for on-chip GPIO found
1122 on Analog Devices ADP5520 PMICs.
1124 config GPIO_ALTERA_A10SR
1125 tristate "Altera Arria10 System Resource GPIO"
1126 depends on MFD_ALTERA_A10SR
1128 Driver for Arria10 Development Kit GPIO expansion which
1129 includes reads of pushbuttons and DIP switches as well
1133 tristate "Wolfson Microelectronics Arizona class devices"
1134 depends on MFD_ARIZONA
1136 Support for GPIOs on Wolfson Arizona class devices.
1139 tristate "ROHM BD70528 GPIO support"
1140 depends on MFD_ROHM_BD70528
1142 Support for GPIOs on ROHM BD70528 PMIC. There are four GPIOs
1143 available on the ROHM PMIC in total. The GPIOs can also
1144 generate interrupts.
1146 This driver can also be built as a module. If so, the module
1147 will be called gpio-bd70528.
1150 tristate "ROHM BD71815 PMIC GPIO support"
1151 depends on MFD_ROHM_BD71828
1153 Support for GPO(s) on ROHM BD71815 PMIC. There are two GPOs
1154 available on the ROHM PMIC.
1156 This driver can also be built as a module. If so, the module
1157 will be called gpio-bd71815.
1160 tristate "ROHM BD71828 GPIO support"
1161 depends on MFD_ROHM_BD71828
1163 Support for GPIOs on ROHM BD71828 PMIC. There are three GPIOs
1164 available on the ROHM PMIC in total. The GPIOs are limited to
1165 outputs only and pins must be configured to GPIO outputs by
1166 OTP. Enable this only if you want to use these pins as outputs.
1168 This driver can also be built as a module. If so, the module
1169 will be called gpio-bd71828.
1171 config GPIO_BD9571MWV
1172 tristate "ROHM BD9571 GPIO support"
1173 depends on MFD_BD9571MWV
1175 Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
1176 available on the ROHM PMIC in total, both of which can also
1177 generate interrupts.
1179 This driver can also be built as a module. If so, the module
1180 will be called gpio-bd9571mwv.
1182 config GPIO_CRYSTAL_COVE
1183 tristate "GPIO support for Crystal Cove PMIC"
1184 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
1185 select GPIOLIB_IRQCHIP
1187 Support for GPIO pins on Crystal Cove PMIC.
1189 Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
1192 This driver can also be built as a module. If so, the module will be
1193 called gpio-crystalcove.
1196 tristate "AMD CS5535/CS5536 GPIO support"
1197 depends on X86 || MIPS || COMPILE_TEST
1198 depends on MFD_CS5535
1200 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
1201 can be used for quite a number of things. The CS5535/6 is found on
1202 AMD Geode and Lemote Yeeloong devices.
1207 tristate "Dialog DA9052 GPIO"
1208 depends on PMIC_DA9052
1210 Say yes here to enable the GPIO driver for the DA9052 chip.
1213 tristate "Dialog Semiconductor DA9055 GPIO"
1214 depends on MFD_DA9055
1216 Say yes here to enable the GPIO driver for the DA9055 chip.
1218 The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
1219 be controller by this driver.
1221 If driver is built as a module it will be called gpio-da9055.
1224 tristate "Diolan DLN2 GPIO support"
1226 select GPIOLIB_IRQCHIP
1229 Select this option to enable GPIO driver for the Diolan DLN2
1232 This driver can also be built as a module. If so, the module
1233 will be called gpio-dln2.
1236 bool "HTC EGPIO support"
1239 This driver supports the CPLD egpio chip present on
1240 several HTC phones. It provides basic support for input
1241 pins, output pins, and irqs.
1244 tristate "GPIO FSM support"
1246 The GPIO FSM driver allows the creation of state machines for
1247 manipulating GPIOs (both real and virtual), with state transitions
1248 triggered by GPIO edges or delays.
1252 config GPIO_JANZ_TTL
1253 tristate "Janz VMOD-TTL Digital IO Module"
1254 depends on MFD_JANZ_CMODIO
1256 This enables support for the Janz VMOD-TTL Digital IO module.
1257 This driver provides support for driving the pins in output
1258 mode only. Input mode is not supported.
1261 tristate "Kontron ETX / COMexpress GPIO"
1262 depends on MFD_KEMPLD
1264 This enables support for the PLD GPIO interface on some Kontron ETX
1265 and COMexpress (ETXexpress) modules.
1267 This driver can also be built as a module. If so, the module will be
1271 tristate "TI/National Semiconductor LP3943 GPIO expander"
1272 depends on MFD_LP3943
1274 GPIO driver for LP3943 MFD.
1275 LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
1276 Open drain outputs are required for this usage.
1279 tristate "TI LP873X GPO"
1280 depends on MFD_TI_LP873X
1282 This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
1285 This driver can also be built as a module. If so, the module will be
1289 tristate "TI LP87565 GPIO"
1290 depends on MFD_TI_LP87565
1292 This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
1295 This driver can also be built as a module. If so, the module will be
1296 called gpio-lp87565.
1299 tristate "Cirrus Logic Madera class codecs"
1300 depends on PINCTRL_MADERA
1302 Support for GPIOs on Cirrus Logic Madera class codecs.
1304 config GPIO_MAX77620
1305 tristate "GPIO support for PMIC MAX77620 and MAX20024"
1306 depends on MFD_MAX77620
1307 select GPIOLIB_IRQCHIP
1309 GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
1310 MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
1311 driver also provides interrupt support for each of the gpios.
1312 Say yes here to enable the max77620 to be used as gpio controller.
1314 config GPIO_MAX77650
1315 tristate "Maxim MAX77650/77651 GPIO support"
1316 depends on MFD_MAX77650
1318 GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
1319 These chips have a single pin that can be configured as GPIO.
1322 bool "TI PALMAS series PMICs GPIO"
1323 depends on MFD_PALMAS
1325 Select this option to enable GPIO driver for the TI PALMAS
1329 bool "RICOH RC5T583 GPIO"
1330 depends on MFD_RC5T583
1332 Select this option to enable GPIO driver for the Ricoh RC5T583
1334 This driver provides the support for driving/reading the gpio pins
1335 of RC5T583 device through standard gpio library.
1337 config GPIO_SL28CPLD
1338 tristate "Kontron sl28cpld GPIO support"
1339 depends on MFD_SL28CPLD || COMPILE_TEST
1341 select GPIOLIB_IRQCHIP
1344 This enables support for the GPIOs found on the Kontron sl28 CPLD.
1346 This driver can also be built as a module. If so, the module will be
1347 called gpio-sl28cpld.
1351 depends on MFD_STMPE
1353 select GPIOLIB_IRQCHIP
1355 This enables support for the GPIOs found on the STMPE I/O
1359 bool "TC3589X GPIOs"
1360 depends on MFD_TC3589X
1362 select GPIOLIB_IRQCHIP
1364 This enables support for the GPIOs found on the TC3589X
1367 config GPIO_TIMBERDALE
1368 bool "Support for timberdale GPIO IP"
1369 depends on MFD_TIMBERDALE
1371 Add support for the GPIO IP in the timberdale FPGA.
1373 config GPIO_TPS65086
1374 tristate "TI TPS65086 GPO"
1375 depends on MFD_TPS65086
1377 This driver supports the GPO on TI TPS65086x PMICs.
1379 config GPIO_TPS65218
1380 tristate "TPS65218 GPIO"
1381 depends on MFD_TPS65218
1383 Select this option to enable GPIO driver for the TPS65218
1386 config GPIO_TPS6586X
1387 bool "TPS6586X GPIO"
1388 depends on MFD_TPS6586X
1390 Select this option to enable GPIO driver for the TPS6586X
1393 config GPIO_TPS65910
1394 bool "TPS65910 GPIO"
1395 depends on MFD_TPS65910
1397 Select this option to enable GPIO driver for the TPS65910
1400 config GPIO_TPS65912
1401 tristate "TI TPS65912 GPIO"
1402 depends on MFD_TPS65912
1404 This driver supports TPS65912 gpio chip
1406 config GPIO_TPS68470
1407 bool "TPS68470 GPIO"
1408 depends on INTEL_SKL_INT3472
1410 Select this option to enable GPIO driver for the TPS68470
1412 There are 7 GPIOs and few sensor related GPIOs supported
1413 by the TPS68470. While the 7 GPIOs can be configured as
1414 input or output as appropriate, the sensor related GPIOs
1415 are "output only" GPIOs.
1417 This driver config is bool, as the GPIO functionality
1418 of the TPS68470 must be available before dependent
1422 tristate "TQ-Systems QTMX86 GPIO"
1423 depends on MFD_TQMX86 || COMPILE_TEST
1424 depends on HAS_IOPORT_MAP
1425 select GPIOLIB_IRQCHIP
1427 This driver supports GPIO on the TQMX86 IO controller.
1430 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1431 depends on TWL4030_CORE
1433 Say yes here to access the GPIO signals of various multi-function
1434 power management chips from Texas Instruments.
1437 tristate "TWL6040 GPO"
1438 depends on TWL6040_CORE
1440 Say yes here to access the GPO signals of twl6040
1441 audio chip from Texas Instruments.
1444 tristate "Philips UCB1400 GPIO"
1445 depends on UCB1400_CORE
1447 This enables support for the Philips UCB1400 GPIO pins.
1448 The UCB1400 is an AC97 audio codec.
1450 config GPIO_WHISKEY_COVE
1451 tristate "GPIO support for Whiskey Cove PMIC"
1452 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1453 select GPIOLIB_IRQCHIP
1455 Support for GPIO pins on Whiskey Cove PMIC.
1457 Say Yes if you have a Intel SoC based tablet with Whiskey Cove PMIC
1460 This driver can also be built as a module. If so, the module will be
1464 tristate "WM831x GPIOs"
1465 depends on MFD_WM831X
1467 Say yes here to access the GPIO signals of WM831x power management
1468 chips from Wolfson Microelectronics.
1471 tristate "WM8350 GPIOs"
1472 depends on MFD_WM8350
1474 Say yes here to access the GPIO signals of WM8350 power management
1475 chips from Wolfson Microelectronics.
1478 tristate "WM8994 GPIOs"
1479 depends on MFD_WM8994
1481 Say yes here to access the GPIO signals of WM8994 audio hub
1482 CODECs from Wolfson Microelectronics.
1486 menu "PCI GPIO expanders"
1490 tristate "AMD 8111 GPIO driver"
1491 depends on X86 || COMPILE_TEST
1492 depends on HAS_IOPORT_MAP
1494 The AMD 8111 south bridge contains 32 GPIO pins which can be used.
1496 Note, that usually system firmware/ACPI handles GPIO pins on their
1497 own and users might easily break their systems with uncarefull usage
1503 tristate "BT8XX GPIO abuser"
1504 depends on VIDEO_BT848=n
1506 The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1507 as a cheap PCI GPIO card.
1509 This chip can be found on Miro, Hauppauge and STB TV-cards.
1511 The card needs to be physically altered for using it as a
1512 GPIO card. For more information on how to build a GPIO card
1513 from a BT8xx TV card, see the documentation file at
1514 Documentation/driver-api/gpio/bt8xxgpio.rst
1518 config GPIO_MERRIFIELD
1519 tristate "Intel Merrifield GPIO support"
1520 depends on X86_INTEL_MID
1521 select GPIOLIB_IRQCHIP
1523 Say Y here to support Intel Merrifield GPIO.
1526 tristate "Mellanox BlueField SoC GPIO"
1527 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1530 Say Y here if you want GPIO support on Mellanox BlueField SoC.
1533 tristate "Mellanox BlueField 2 SoC GPIO"
1534 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1537 Say Y here if you want GPIO support on Mellanox BlueField 2 SoC.
1540 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1541 depends on X86 || COMPILE_TEST
1542 select GENERIC_IRQ_CHIP
1544 ML7213 is companion chip for Intel Atom E6xx series.
1545 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
1546 Hub) which is for IVI(In-Vehicle Infotainment) use.
1547 This driver can access the IOH's GPIO device.
1550 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
1551 depends on X86_32 || MIPS || COMPILE_TEST
1552 select GENERIC_IRQ_CHIP
1554 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
1555 which is an IOH(Input/Output Hub) for x86 embedded processor.
1556 This driver can access PCH GPIO device.
1558 This driver also can be used for LAPIS Semiconductor IOH(Input/
1559 Output Hub), ML7223 and ML7831.
1560 ML7223 IOH is for MP(Media Phone) use.
1561 ML7831 IOH is for general purpose use.
1562 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1563 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1565 config GPIO_PCI_IDIO_16
1566 tristate "ACCES PCI-IDIO-16 GPIO support"
1567 select GPIOLIB_IRQCHIP
1569 Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1570 generated when any of the inputs change state (low to high or high to
1571 low). Input filter control is not supported by this driver, and the
1572 input filters are deactivated by this driver.
1574 config GPIO_PCIE_IDIO_24
1575 tristate "ACCES PCIe-IDIO-24 GPIO support"
1576 select GPIOLIB_IRQCHIP
1578 Enables GPIO support for the ACCES PCIe-IDIO-24 family (PCIe-IDIO-24,
1579 PCIe-IDI-24, PCIe-IDO-24, PCIe-IDIO-12). An interrupt is generated
1580 when any of the inputs change state (low to high or high to low).
1581 Input filter control is not supported by this driver, and the input
1582 filters are deactivated by this driver.
1585 tristate "RDC R-321x GPIO support"
1589 Support for the RDC R321x SoC GPIOs over southbridge
1590 PCI configuration space.
1592 config GPIO_SODAVILLE
1593 bool "Intel Sodaville GPIO support"
1594 depends on X86 && OF
1596 select GENERIC_IRQ_CHIP
1598 Say Y here to support Intel Sodaville GPIO.
1602 menu "SPI GPIO expanders"
1603 depends on SPI_MASTER
1606 tristate "74x164 serial-in/parallel-out 8-bits shift register"
1609 Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1610 shift registers. This driver can be used to provide access
1611 to more gpio outputs.
1613 config GPIO_MAX3191X
1614 tristate "Maxim MAX3191x industrial serializer"
1617 GPIO driver for Maxim MAX31910, MAX31911, MAX31912, MAX31913,
1618 MAX31953 and MAX31963 industrial serializer, a daisy-chainable
1619 chip to make 8 digital 24V inputs available via SPI. Supports
1620 CRC checksums to guard against electromagnetic interference,
1621 as well as undervoltage and overtemperature detection.
1624 tristate "Maxim MAX7301 GPIO expander"
1627 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1630 tristate "Freescale MC33880 high-side/low-side switch"
1632 SPI driver for Freescale MC33880 high-side/low-side switch.
1633 This provides GPIO interface supporting inputs and outputs.
1636 tristate "Generic parallel-in/serial-out shift register"
1638 GPIO driver for SPI compatible parallel-in/serial-out shift
1639 registers. These are input only devices.
1642 tristate "EXAR XRA1403 16-bit GPIO expander"
1645 GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1648 tristate "Turris Mox Moxtet bus GPIO expander"
1651 Say yes here if you are building for the Turris Mox router.
1652 This is the driver needed for configuring the GPIOs via the Moxtet
1653 bus. For example the Mox module with SFP cage needs this driver
1654 so that phylink can use corresponding GPIOs.
1658 menu "USB GPIO expanders"
1661 config GPIO_VIPERBOARD
1662 tristate "Viperboard GPIO a & b support"
1663 depends on MFD_VIPERBOARD
1665 Say yes here to access the GPIO signals of Nano River
1666 Technologies Viperboard. There are two GPIO chips on the
1667 board: gpioa and gpiob.
1668 See viperboard API specification and Nano
1669 River Tech's viperboard.h for detailed meaning
1670 of the module parameters.
1674 menu "Virtual GPIO drivers"
1676 config GPIO_AGGREGATOR
1677 tristate "GPIO Aggregator"
1679 Say yes here to enable the GPIO Aggregator, which provides a way to
1680 aggregate existing GPIO lines into a new virtual GPIO chip.
1681 This can serve the following purposes:
1682 - Assign permissions for a collection of GPIO lines to a user,
1683 - Export a collection of GPIO lines to a virtual machine,
1684 - Provide a generic driver for a GPIO-operated device in an
1685 industrial control context, to be operated from userspace using
1686 the GPIO chardev interface.
1689 tristate "GPIO Testing Driver"
1692 This enables GPIO Testing driver, which provides a way to test GPIO
1693 subsystem through sysfs (or char device) and debugfs.
1694 User could use it through the script in
1695 tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in
1699 tristate "VirtIO GPIO support"
1702 Say Y here to enable guest support for virtio-based GPIO controllers.
1704 These virtual GPIOs can be routed to real GPIOs or attached to
1705 simulators on the host (like QEMU).