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"
324 depends on PCI && X86
328 Say yes here to support the GPIO functionality of a number of Intel
329 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
330 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
331 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
336 tristate "Intel IOP GPIO"
337 depends on ARCH_IOP32X || COMPILE_TEST
340 Say yes here to support the GPIO functionality of a number of Intel
346 bool "Intel IXP4xx GPIO"
347 depends on ARM # For <asm/mach-types.h>
348 depends on ARCH_IXP4XX
350 select GPIOLIB_IRQCHIP
351 select IRQ_DOMAIN_HIERARCHY
353 Say yes here to support the GPIO functionality of a number of Intel
354 IXP4xx series of chips.
358 tristate "Xylon LogiCVC GPIO support"
359 depends on MFD_SYSCON && OF
361 Say yes here to support GPIO functionality of the Xylon LogiCVC
362 programmable logic block.
365 bool "Loongson-2/3 GPIO support"
366 depends on CPU_LOONGSON2EF || CPU_LOONGSON64
368 driver for GPIO functionality on Loongson-2F/3A/3B processors.
371 tristate "NXP LPC18XX/43XX GPIO support"
372 default y if ARCH_LPC18XX
373 depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
374 select IRQ_DOMAIN_HIERARCHY
376 Select this option to enable GPIO driver for
377 NXP LPC18XX/43XX devices.
380 tristate "NXP LPC32XX GPIO support"
381 depends on OF_GPIO && (ARCH_LPC32XX || COMPILE_TEST)
383 Select this option to enable GPIO driver for
387 tristate "GPIO support for Fujitsu MB86S7x Platforms"
389 Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
392 tristate "MEN 16Z127 GPIO support"
396 Say yes here to support the MEN 16Z127 GPIO Controller
398 config GPIO_MM_LANTIQ
399 bool "Lantiq Memory mapped GPIOs"
400 depends on LANTIQ && SOC_XWAY
402 This enables support for memory mapped GPIOs on the External Bus Unit
403 (EBU) found on Lantiq SoCs. The gpios are output only as they are
404 created by attaching a 16bit latch to the bus.
408 depends on PPC_MPC52xx
411 bool "MPC512x/MPC8xxx/QorIQ GPIO support"
412 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
413 FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
418 Say Y here if you're going to use hardware that connects to the
419 MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
422 bool "Mediatek MT7621 GPIO Support"
423 depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
426 select GPIOLIB_IRQCHIP
428 Say yes here to support the Mediatek MT7621 SoC GPIO device
432 depends on PLAT_ORION || ARCH_MVEBU
434 select GENERIC_IRQ_CHIP
438 tristate "i.MX GPIO support"
439 depends on ARCH_MXC || COMPILE_TEST
441 select GENERIC_IRQ_CHIP
444 bool "Freescale MXS GPIO support" if COMPILE_TEST
445 depends on ARCH_MXS || COMPILE_TEST
446 default y if ARCH_MXS
448 select GENERIC_IRQ_CHIP
451 tristate "Cavium OCTEON GPIO"
452 depends on CAVIUM_OCTEON_SOC
455 Say yes here to support the on-chip GPIO lines on the OCTEON
459 tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
460 default y if ARCH_OMAP
462 select GENERIC_IRQ_CHIP
463 select GPIOLIB_IRQCHIP
465 Say yes here to enable GPIO support for TI OMAP SoCs.
468 tristate "PrimeCell PL061 GPIO support"
471 select GPIOLIB_IRQCHIP
473 Say yes here to support the PrimeCell PL061 GPIO device
475 config GPIO_PMIC_EIC_SPRD
476 tristate "Spreadtrum PMIC EIC support"
477 depends on MFD_SC27XX_PMIC || COMPILE_TEST
479 select GPIOLIB_IRQCHIP
481 Say yes here to support Spreadtrum PMIC EIC device.
484 bool "PXA GPIO support"
485 depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
487 Say yes here to support the PXA GPIO device
490 tristate "Renesas R-Car and RZ/G GPIO support"
491 depends on ARCH_RENESAS || COMPILE_TEST
492 select GPIOLIB_IRQCHIP
494 Say yes here to support GPIO on Renesas R-Car or RZ/G SoCs.
497 bool "RDA Micro GPIO controller support"
498 depends on ARCH_RDA || COMPILE_TEST
501 select GPIOLIB_IRQCHIP
503 Say Y here to support RDA Micro GPIO controller.
505 config GPIO_REALTEK_OTTO
506 tristate "Realtek Otto GPIO support"
507 depends on MACH_REALTEK_RTL
508 default MACH_REALTEK_RTL
510 select GPIOLIB_IRQCHIP
512 The GPIO controller on the Otto MIPS platform supports up to two
513 banks of 32 GPIOs, with edge triggered interrupts. The 32 GPIOs
514 are grouped in four 8-bit wide ports.
516 When built as a module, the module will be called realtek_otto_gpio.
521 A 32-bit single register GPIO fixed in/out implementation. This
522 can be used to represent any register as a set of GPIO signals.
524 config GPIO_SAMA5D2_PIOBU
525 tristate "SAMA5D2 PIOBU GPIO support"
526 depends on MFD_SYSCON
530 Say yes here to use the PIOBU pins as GPIOs.
532 PIOBU pins on the SAMA5D2 can be used as GPIOs.
533 The difference from regular GPIOs is that they
534 maintain their value during backup/self-refresh.
537 bool "SiFive GPIO support"
539 select IRQ_DOMAIN_HIERARCHY
541 select GPIOLIB_IRQCHIP
544 Say yes here to support the GPIO device on SiFive SoCs.
547 tristate "SIOX GPIO support"
549 select GPIOLIB_IRQCHIP
551 Say yes here to support SIOX I/O devices. These are units connected
552 via a SIOX bus and have a number of fixed-direction I/O lines.
554 config GPIO_SNPS_CREG
555 bool "Synopsys GPIO via CREG (Control REGisters) driver"
556 depends on ARC || COMPILE_TEST
559 This driver supports GPIOs via CREG on various Synopsys SoCs.
560 This is a single-register MMIO GPIO driver for complex cases
561 where only several fields in register belong to GPIO lines and
562 each GPIO line owns a field with different length and on/off value.
564 config GPIO_SPEAR_SPICS
565 bool "ST SPEAr13xx SPI Chip Select as GPIO support"
566 depends on PLAT_SPEAR
567 select GENERIC_IRQ_CHIP
569 Say yes here to support ST SPEAr SPI Chip Select as GPIO device
572 tristate "Spreadtrum GPIO support"
573 depends on ARCH_SPRD || COMPILE_TEST
575 select GPIOLIB_IRQCHIP
577 Say yes here to support Spreadtrum GPIO device.
580 bool "STA2x11/ConneXt GPIO support"
581 depends on MFD_STA2X11
582 select GENERIC_IRQ_CHIP
584 Say yes here to support the STA2x11/ConneXt GPIO device.
585 The GPIO module has 128 GPIO pins with alternate functions.
588 bool "XWAY STP GPIOs"
589 depends on SOC_XWAY || COMPILE_TEST
592 This enables support for the Serial To Parallel (STP) unit found on
593 XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
594 that can be up to 24 bit. This peripheral is aimed at driving leds.
595 Some of the gpios/leds can be auto updated by the soc with dsl and
599 tristate "GPIO based on SYSCON"
600 depends on MFD_SYSCON && OF
602 Say yes here to support GPIO functionality though SYSCON driver.
607 select GENERIC_IRQ_CHIP
611 tristate "NVIDIA Tegra GPIO support"
613 depends on ARCH_TEGRA || COMPILE_TEST
615 select GPIOLIB_IRQCHIP
616 select IRQ_DOMAIN_HIERARCHY
618 Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
621 tristate "NVIDIA Tegra186 GPIO support"
622 default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC
623 depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || COMPILE_TEST
625 select GPIOLIB_IRQCHIP
626 select IRQ_DOMAIN_HIERARCHY
628 Say yes here to support GPIO pins on NVIDIA Tegra186 SoCs.
631 tristate "TS-4800 DIO blocks and compatibles"
633 depends on SOC_IMX51 || COMPILE_TEST
636 This driver support TS-4800 FPGA GPIO controllers.
639 tristate "Cavium ThunderX/OCTEON-TX GPIO"
640 depends on ARCH_THUNDER || (64BIT && COMPILE_TEST)
642 select GPIOLIB_IRQCHIP
643 select IRQ_DOMAIN_HIERARCHY
644 select IRQ_FASTEOI_HIERARCHY_HANDLERS
646 Say yes here to support the on-chip GPIO lines on the ThunderX
647 and OCTEON-TX families of SoCs.
650 tristate "UniPhier GPIO support"
651 depends on ARCH_UNIPHIER || COMPILE_TEST
653 select IRQ_DOMAIN_HIERARCHY
655 Say yes here to support UniPhier GPIOs.
659 depends on ARCH_MXC && SOC_VF610
660 select GPIOLIB_IRQCHIP
662 Say yes here to support Vybrid vf610 GPIOs.
665 tristate "Toshiba Visconti GPIO support"
666 depends on ARCH_VISCONTI || COMPILE_TEST
668 select GPIOLIB_IRQCHIP
670 select IRQ_DOMAIN_HIERARCHY
672 Say yes here to support GPIO on Tohisba Visconti.
675 tristate "NEC VR4100 series General-purpose I/O Uint support"
676 depends on CPU_VR41XX
678 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
681 tristate "VIA VX855/VX875 GPIO"
682 depends on (X86 || COMPILE_TEST) && PCI
686 Support access to the VX855/VX875 GPIO lines through the gpio library.
688 This driver provides common support for accessing the device,
689 additional drivers must be enabled in order to use the
690 functionality of the device.
693 tristate "Qualcomm Technologies Inc WCD9340/WCD9341 gpio controller driver"
694 depends on MFD_WCD934X && OF_GPIO
696 This driver is to support GPIO block found on the Qualcomm Technologies
697 Inc WCD9340/WCD9341 Audio Codec.
700 bool "APM X-Gene GPIO controller support"
701 depends on ARM64 && OF_GPIO
703 This driver is to support the GPIO block within the APM X-Gene SoC
704 platform's generic flash controller. The GPIO pins are muxed with
705 the generic flash controller's address and data pins. Say yes
706 here to enable the GFC GPIO functionality.
709 tristate "APM X-Gene GPIO standby controller support"
710 depends on (ARCH_XGENE || COMPILE_TEST)
712 select GPIOLIB_IRQCHIP
713 select IRQ_DOMAIN_HIERARCHY
715 This driver supports the GPIO block within the APM X-Gene
716 Standby Domain. Say yes here to enable the GPIO functionality.
719 tristate "Xilinx GPIO support"
720 select GPIOLIB_IRQCHIP
723 Say yes here to support the Xilinx FPGA GPIO device
726 tristate "Netlogic XLP GPIO support"
727 depends on OF_GPIO && (CPU_XLP || ARCH_THUNDER2 || COMPILE_TEST)
728 select GPIOLIB_IRQCHIP
730 This driver provides support for GPIO interface on Netlogic XLP MIPS64
731 SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
732 XLP9XX and XLP5XX. The same GPIO controller block is also present in
733 Cavium's ThunderX2 CN99XX SoCs.
738 bool "Xtensa GPIO32 support"
740 depends on HAVE_XTENSA_GPIO32
743 Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
744 and EXPSTATE (output) ports
747 bool "LSI ZEVIO SoC memory mapped GPIOs"
748 depends on ARM && OF_GPIO
750 Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
753 tristate "Xilinx Zynq GPIO support"
754 depends on ARCH_ZYNQ || ARCH_ZYNQMP
755 select GPIOLIB_IRQCHIP
757 Say yes here to support Xilinx Zynq GPIO controller.
759 config GPIO_LOONGSON1
760 tristate "Loongson1 GPIO support"
761 depends on MACH_LOONGSON32
764 Say Y or M here to support GPIO on Loongson1 SoCs.
767 tristate "GPIO support for AMD Fusion Controller Hub (G-series SOCs)"
769 This option enables driver for GPIO on AMDs Fusion Controller Hub,
770 as found on G-series SOCs (eg. GX-412TC)
772 Note: This driver doesn't registers itself automatically, as it
773 needs to be provided with platform specific configuration.
774 (See eg. CONFIG_PCENGINES_APU2.)
777 bool "MStar MSC313 GPIO support"
778 depends on ARCH_MSTARV7
780 select GPIOLIB_IRQCHIP
781 select IRQ_DOMAIN_HIERARCHY
783 Say Y here to support the main GPIO block on MStar/SigmaStar
788 menu "Port-mapped I/O GPIO drivers"
789 depends on X86 # Unconditional I/O space access
791 config GPIO_104_DIO_48E
792 tristate "ACCES 104-DIO-48E GPIO support"
795 select GPIOLIB_IRQCHIP
797 Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
798 104-DIO-24E). The base port addresses for the devices may be
799 configured via the base module parameter. The interrupt line numbers
800 for the devices may be configured via the irq module parameter.
802 config GPIO_104_IDIO_16
803 tristate "ACCES 104-IDIO-16 GPIO support"
806 select GPIOLIB_IRQCHIP
808 Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
809 104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
810 base port addresses for the devices may be configured via the base
811 module parameter. The interrupt line numbers for the devices may be
812 configured via the irq module parameter.
814 config GPIO_104_IDI_48
815 tristate "ACCES 104-IDI-48 GPIO support"
818 select GPIOLIB_IRQCHIP
820 Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
821 104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
822 the devices may be configured via the base module parameter. The
823 interrupt line numbers for the devices may be configured via the irq
827 tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support"
829 This option enables support for GPIOs found on Fintek Super-I/O
830 chips F71869, F71869A, F71882FG, F71889F and F81866.
832 To compile this driver as a module, choose M here: the module will
833 be called f7188x-gpio.
836 tristate "Diamond Systems GPIO-MM GPIO support"
840 Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
842 The Diamond Systems GPIO-MM device features 48 lines of digital I/O
843 via the emulation of dual 82C55A PPI chips. This driver provides GPIO
844 support for these 48 channels of digital I/O.
846 The base port addresses for the devices may be configured via the base
847 array module parameter.
850 tristate "IT87xx GPIO support"
852 Say yes here to support GPIO functionality of IT87xx Super I/O chips.
854 This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
855 supports the IT8761E, IT8613, IT8620E, and IT8628E Super I/O chips as
858 To compile this driver as a module, choose M here: the module will
862 tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
863 depends on (X86 || COMPILE_TEST) && ACPI
865 select GPIOLIB_IRQCHIP
867 Say yes here to support GPIO interface on Intel Poulsbo SCH,
868 Intel Tunnel Creek processor, Intel Centerton processor or
869 Intel Quark X1000 SoC.
871 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
872 powered by the core power rail and are turned off during sleep
873 modes (S3 and higher). The remaining four GPIOs are powered by
874 the Intel SCH suspend power supply. These GPIOs remain
875 active during S3. The suspend powered GPIOs can be used to wake the
876 system from the Suspend-to-RAM state.
878 The Intel Tunnel Creek processor has 5 GPIOs powered by the
879 core power rail and 9 from suspend power supply.
881 The Intel Centerton processor has a total of 30 GPIO pins.
882 Twenty-one are powered by the core power rail and 9 from the
883 suspend power supply.
885 The Intel Quark X1000 SoC has 2 GPIOs powered by the core
886 power well and 6 from the suspend power well.
889 tristate "SMSC SCH311x SuperI/O GPIO"
891 Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
892 SCH3116 "Super I/O" chipsets.
894 To compile this driver as a module, choose M here: the module will
895 be called gpio-sch311x.
898 tristate "TS-5500 DIO blocks and compatibles"
899 depends on TS5500 || COMPILE_TEST
901 This driver supports Digital I/O exposed by pin blocks found on some
902 Technologic Systems platforms. It includes, but is not limited to, 3
903 blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
907 tristate "Winbond Super I/O GPIO support"
910 This option enables support for GPIOs found on Winbond Super I/O
912 Currently, only W83627UHG (also known as Nuvoton NCT6627UD) is
915 You will need to provide a module parameter "gpios", or a
916 boot-time parameter "gpio_winbond.gpios" with a bitmask of GPIO
917 ports to enable (bit 0 is GPIO1, bit 1 is GPIO2, etc.).
919 To compile this driver as a module, choose M here: the module will
920 be called gpio-winbond.
923 tristate "WinSystems WS16C48 GPIO support"
925 select GPIOLIB_IRQCHIP
927 Enables GPIO support for the WinSystems WS16C48. The base port
928 addresses for the devices may be configured via the base module
929 parameter. The interrupt line numbers for the devices may be
930 configured via the irq module parameter.
934 menu "I2C GPIO expanders"
938 tristate "ADP5588 I2C GPIO expander"
940 This option enables support for 18 GPIOs found
941 on Analog Devices ADP5588 GPIO Expanders.
943 config GPIO_ADP5588_IRQ
944 bool "Interrupt controller support for ADP5588"
945 depends on GPIO_ADP5588=y
946 select GPIOLIB_IRQCHIP
948 Say yes here to enable the adp5588 to be used as an interrupt
949 controller. It requires the driver to be built in the kernel.
952 tristate "Avionic Design N-bit GPIO expander"
954 select GPIOLIB_IRQCHIP
956 This option enables support for N GPIOs found on Avionic Design
957 I2C GPIO expanders. The register space will be extended by powers
958 of two, so the controller will need to accommodate for that. For
959 example: if a controller provides 48 pins, 6 registers will be
960 enough to represent all pins, but the driver will assume a
961 register layout for 64 pins (8 registers).
964 tristate "Gateworks PLD GPIO Expander"
967 Say yes here to provide access to the Gateworks I2C PLD GPIO
968 Expander. This is used at least on the Cambria GW2358-4.
971 tristate "Maxim MAX7300 GPIO expander"
974 GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
977 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
979 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
980 Port Expanders. Each IO port on these chips has a fixed role of
981 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
982 Input and Output (designed by 'P'). The combinations are listed
985 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
986 max7322 (4I4O), max7323 (4P4O)
988 16 bits: max7324 (8I8O), max7325 (8P8O),
989 max7326 (4I12O), max7327 (4P12O)
991 Board setup code must specify the model to use, and the start
992 number for these GPIOs.
994 config GPIO_MAX732X_IRQ
995 bool "Interrupt controller support for MAX732x"
996 depends on GPIO_MAX732X=y
997 select GPIOLIB_IRQCHIP
999 Say yes here to enable the max732x to be used as an interrupt
1000 controller. It requires the driver to be built in the kernel.
1002 config GPIO_MC9S08DZ60
1003 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
1004 depends on I2C=y && MACH_MX35_3DS
1006 Select this to enable the MC9S08DZ60 GPIO driver
1009 tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
1012 Say yes here to provide access to several register-oriented
1013 SMBus I/O expanders, made mostly by NXP or TI. Compatible
1016 4 bits: pca9536, pca9537
1018 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554,
1019 pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
1021 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
1026 40 bits: pca9505, pca9698
1028 config GPIO_PCA953X_IRQ
1029 bool "Interrupt controller support for PCA953x"
1030 depends on GPIO_PCA953X
1031 select GPIOLIB_IRQCHIP
1033 Say yes here to enable the pca953x to be used as an interrupt
1034 controller. It requires the driver to be built in the kernel.
1037 tristate "PCA9570 4-Bit I2C GPO expander"
1039 Say yes here to enable the GPO driver for the NXP PCA9570 chip.
1041 To compile this driver as a module, choose M here: the module will
1042 be called gpio-pca9570.
1045 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
1046 select GPIOLIB_IRQCHIP
1049 Say yes here to provide access to most "quasi-bidirectional" I2C
1050 GPIO expanders used for additional digital outputs or inputs.
1051 Most of these parts are from NXP, though TI is a second source for
1052 some of them. Compatible models include:
1054 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
1055 pca9670, pca9672, pca9674, pca9674a,
1058 16 bits: pcf8575, pcf8575c, pca8575,
1059 pca9671, pca9673, pca9675
1061 Your board setup code will need to declare the expanders in
1062 use, and assign numbers to the GPIOs they expose. Those GPIOs
1063 can then be used from drivers and other kernel code, just like
1064 other GPIOs, but only accessible from task contexts.
1066 This driver provides an in-kernel interface to those GPIOs using
1067 platform-neutral GPIO calls.
1069 config GPIO_TPIC2810
1070 tristate "TPIC2810 8-Bit I2C GPO expander"
1072 Say yes here to enable the GPO driver for the TI TPIC2810 chip.
1074 To compile this driver as a module, choose M here: the module will
1075 be called gpio-tpic2810.
1078 tristate "Technologic Systems FPGA I2C GPIO"
1079 depends on SOC_IMX6 || COMPILE_TEST
1082 Say yes here to enabled the GPIO driver for Technologic's FPGA core.
1083 Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
1087 menu "MFD GPIO expanders"
1090 tristate "GPIO Support for ADP5520 PMIC"
1091 depends on PMIC_ADP5520
1093 This option enables support for on-chip GPIO found
1094 on Analog Devices ADP5520 PMICs.
1096 config GPIO_ALTERA_A10SR
1097 tristate "Altera Arria10 System Resource GPIO"
1098 depends on MFD_ALTERA_A10SR
1100 Driver for Arria10 Development Kit GPIO expansion which
1101 includes reads of pushbuttons and DIP switches as well
1105 tristate "Wolfson Microelectronics Arizona class devices"
1106 depends on MFD_ARIZONA
1108 Support for GPIOs on Wolfson Arizona class devices.
1111 tristate "ROHM BD70528 GPIO support"
1112 depends on MFD_ROHM_BD70528
1114 Support for GPIOs on ROHM BD70528 PMIC. There are four GPIOs
1115 available on the ROHM PMIC in total. The GPIOs can also
1116 generate interrupts.
1118 This driver can also be built as a module. If so, the module
1119 will be called gpio-bd70528.
1122 tristate "ROHM BD71828 GPIO support"
1123 depends on MFD_ROHM_BD71828
1125 Support for GPIOs on ROHM BD71828 PMIC. There are three GPIOs
1126 available on the ROHM PMIC in total. The GPIOs are limited to
1127 outputs only and pins must be configured to GPIO outputs by
1128 OTP. Enable this only if you want to use these pins as outputs.
1130 This driver can also be built as a module. If so, the module
1131 will be called gpio-bd71828.
1133 config GPIO_BD9571MWV
1134 tristate "ROHM BD9571 GPIO support"
1135 depends on MFD_BD9571MWV
1137 Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
1138 available on the ROHM PMIC in total, both of which can also
1139 generate interrupts.
1141 This driver can also be built as a module. If so, the module
1142 will be called gpio-bd9571mwv.
1144 config GPIO_CRYSTAL_COVE
1145 tristate "GPIO support for Crystal Cove PMIC"
1146 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
1147 select GPIOLIB_IRQCHIP
1149 Support for GPIO pins on Crystal Cove PMIC.
1151 Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
1154 This driver can also be built as a module. If so, the module will be
1155 called gpio-crystalcove.
1158 tristate "AMD CS5535/CS5536 GPIO support"
1159 depends on X86 || MIPS || COMPILE_TEST
1160 depends on MFD_CS5535
1162 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
1163 can be used for quite a number of things. The CS5535/6 is found on
1164 AMD Geode and Lemote Yeeloong devices.
1169 tristate "Dialog DA9052 GPIO"
1170 depends on PMIC_DA9052
1172 Say yes here to enable the GPIO driver for the DA9052 chip.
1175 tristate "Dialog Semiconductor DA9055 GPIO"
1176 depends on MFD_DA9055
1178 Say yes here to enable the GPIO driver for the DA9055 chip.
1180 The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
1181 be controller by this driver.
1183 If driver is built as a module it will be called gpio-da9055.
1186 tristate "Diolan DLN2 GPIO support"
1188 select GPIOLIB_IRQCHIP
1191 Select this option to enable GPIO driver for the Diolan DLN2
1194 This driver can also be built as a module. If so, the module
1195 will be called gpio-dln2.
1198 bool "HTC EGPIO support"
1201 This driver supports the CPLD egpio chip present on
1202 several HTC phones. It provides basic support for input
1203 pins, output pins, and irqs.
1205 config GPIO_JANZ_TTL
1206 tristate "Janz VMOD-TTL Digital IO Module"
1207 depends on MFD_JANZ_CMODIO
1209 This enables support for the Janz VMOD-TTL Digital IO module.
1210 This driver provides support for driving the pins in output
1211 mode only. Input mode is not supported.
1214 tristate "Kontron ETX / COMexpress GPIO"
1215 depends on MFD_KEMPLD
1217 This enables support for the PLD GPIO interface on some Kontron ETX
1218 and COMexpress (ETXexpress) modules.
1220 This driver can also be built as a module. If so, the module will be
1224 tristate "TI/National Semiconductor LP3943 GPIO expander"
1225 depends on MFD_LP3943
1227 GPIO driver for LP3943 MFD.
1228 LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
1229 Open drain outputs are required for this usage.
1232 tristate "TI LP873X GPO"
1233 depends on MFD_TI_LP873X
1235 This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
1238 This driver can also be built as a module. If so, the module will be
1242 tristate "TI LP87565 GPIO"
1243 depends on MFD_TI_LP87565
1245 This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
1248 This driver can also be built as a module. If so, the module will be
1249 called gpio-lp87565.
1252 tristate "Cirrus Logic Madera class codecs"
1253 depends on PINCTRL_MADERA
1255 Support for GPIOs on Cirrus Logic Madera class codecs.
1257 config GPIO_MAX77620
1258 tristate "GPIO support for PMIC MAX77620 and MAX20024"
1259 depends on MFD_MAX77620
1260 select GPIOLIB_IRQCHIP
1262 GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
1263 MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
1264 driver also provides interrupt support for each of the gpios.
1265 Say yes here to enable the max77620 to be used as gpio controller.
1267 config GPIO_MAX77650
1268 tristate "Maxim MAX77650/77651 GPIO support"
1269 depends on MFD_MAX77650
1271 GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
1272 These chips have a single pin that can be configured as GPIO.
1275 bool "TI PALMAS series PMICs GPIO"
1276 depends on MFD_PALMAS
1278 Select this option to enable GPIO driver for the TI PALMAS
1282 bool "RICOH RC5T583 GPIO"
1283 depends on MFD_RC5T583
1285 Select this option to enable GPIO driver for the Ricoh RC5T583
1287 This driver provides the support for driving/reading the gpio pins
1288 of RC5T583 device through standard gpio library.
1290 config GPIO_SL28CPLD
1291 tristate "Kontron sl28cpld GPIO support"
1292 depends on MFD_SL28CPLD || COMPILE_TEST
1294 select GPIOLIB_IRQCHIP
1297 This enables support for the GPIOs found on the Kontron sl28 CPLD.
1299 This driver can also be built as a module. If so, the module will be
1300 called gpio-sl28cpld.
1304 depends on MFD_STMPE
1306 select GPIOLIB_IRQCHIP
1308 This enables support for the GPIOs found on the STMPE I/O
1312 bool "TC3589X GPIOs"
1313 depends on MFD_TC3589X
1315 select GPIOLIB_IRQCHIP
1317 This enables support for the GPIOs found on the TC3589X
1320 config GPIO_TIMBERDALE
1321 bool "Support for timberdale GPIO IP"
1322 depends on MFD_TIMBERDALE
1324 Add support for the GPIO IP in the timberdale FPGA.
1326 config GPIO_TPS65086
1327 tristate "TI TPS65086 GPO"
1328 depends on MFD_TPS65086
1330 This driver supports the GPO on TI TPS65086x PMICs.
1332 config GPIO_TPS65218
1333 tristate "TPS65218 GPIO"
1334 depends on MFD_TPS65218
1336 Select this option to enable GPIO driver for the TPS65218
1339 config GPIO_TPS6586X
1340 bool "TPS6586X GPIO"
1341 depends on MFD_TPS6586X
1343 Select this option to enable GPIO driver for the TPS6586X
1346 config GPIO_TPS65910
1347 bool "TPS65910 GPIO"
1348 depends on MFD_TPS65910
1350 Select this option to enable GPIO driver for the TPS65910
1353 config GPIO_TPS65912
1354 tristate "TI TPS65912 GPIO"
1355 depends on MFD_TPS65912
1357 This driver supports TPS65912 gpio chip
1359 config GPIO_TPS68470
1360 bool "TPS68470 GPIO"
1361 depends on MFD_TPS68470
1363 Select this option to enable GPIO driver for the TPS68470
1365 There are 7 GPIOs and few sensor related GPIOs supported
1366 by the TPS68470. While the 7 GPIOs can be configured as
1367 input or output as appropriate, the sensor related GPIOs
1368 are "output only" GPIOs.
1370 This driver config is bool, as the GPIO functionality
1371 of the TPS68470 must be available before dependent
1375 tristate "TQ-Systems QTMX86 GPIO"
1376 depends on MFD_TQMX86 || COMPILE_TEST
1377 select GPIOLIB_IRQCHIP
1379 This driver supports GPIO on the TQMX86 IO controller.
1382 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1383 depends on TWL4030_CORE
1385 Say yes here to access the GPIO signals of various multi-function
1386 power management chips from Texas Instruments.
1389 tristate "TWL6040 GPO"
1390 depends on TWL6040_CORE
1392 Say yes here to access the GPO signals of twl6040
1393 audio chip from Texas Instruments.
1396 tristate "Philips UCB1400 GPIO"
1397 depends on UCB1400_CORE
1399 This enables support for the Philips UCB1400 GPIO pins.
1400 The UCB1400 is an AC97 audio codec.
1402 config GPIO_WHISKEY_COVE
1403 tristate "GPIO support for Whiskey Cove PMIC"
1404 depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1405 select GPIOLIB_IRQCHIP
1407 Support for GPIO pins on Whiskey Cove PMIC.
1409 Say Yes if you have a Intel SoC based tablet with Whiskey Cove PMIC
1412 This driver can also be built as a module. If so, the module will be
1416 tristate "WM831x GPIOs"
1417 depends on MFD_WM831X
1419 Say yes here to access the GPIO signals of WM831x power management
1420 chips from Wolfson Microelectronics.
1423 tristate "WM8350 GPIOs"
1424 depends on MFD_WM8350
1426 Say yes here to access the GPIO signals of WM8350 power management
1427 chips from Wolfson Microelectronics.
1430 tristate "WM8994 GPIOs"
1431 depends on MFD_WM8994
1433 Say yes here to access the GPIO signals of WM8994 audio hub
1434 CODECs from Wolfson Microelectronics.
1438 menu "PCI GPIO expanders"
1442 tristate "AMD 8111 GPIO driver"
1443 depends on X86 || COMPILE_TEST
1445 The AMD 8111 south bridge contains 32 GPIO pins which can be used.
1447 Note, that usually system firmware/ACPI handles GPIO pins on their
1448 own and users might easily break their systems with uncarefull usage
1454 tristate "BT8XX GPIO abuser"
1455 depends on VIDEO_BT848=n
1457 The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1458 as a cheap PCI GPIO card.
1460 This chip can be found on Miro, Hauppauge and STB TV-cards.
1462 The card needs to be physically altered for using it as a
1463 GPIO card. For more information on how to build a GPIO card
1464 from a BT8xx TV card, see the documentation file at
1465 Documentation/driver-api/gpio/bt8xxgpio.rst
1469 config GPIO_MERRIFIELD
1470 tristate "Intel Merrifield GPIO support"
1471 depends on X86_INTEL_MID
1472 select GPIOLIB_IRQCHIP
1474 Say Y here to support Intel Merrifield GPIO.
1477 tristate "Mellanox BlueField SoC GPIO"
1478 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1481 Say Y here if you want GPIO support on Mellanox BlueField SoC.
1484 tristate "Mellanox BlueField 2 SoC GPIO"
1485 depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1488 Say Y here if you want GPIO support on Mellanox BlueField 2 SoC.
1491 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1492 depends on X86 || COMPILE_TEST
1493 select GENERIC_IRQ_CHIP
1495 ML7213 is companion chip for Intel Atom E6xx series.
1496 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
1497 Hub) which is for IVI(In-Vehicle Infotainment) use.
1498 This driver can access the IOH's GPIO device.
1501 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
1502 depends on X86_32 || MIPS || COMPILE_TEST
1503 select GENERIC_IRQ_CHIP
1505 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
1506 which is an IOH(Input/Output Hub) for x86 embedded processor.
1507 This driver can access PCH GPIO device.
1509 This driver also can be used for LAPIS Semiconductor IOH(Input/
1510 Output Hub), ML7223 and ML7831.
1511 ML7223 IOH is for MP(Media Phone) use.
1512 ML7831 IOH is for general purpose use.
1513 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1514 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1516 config GPIO_PCI_IDIO_16
1517 tristate "ACCES PCI-IDIO-16 GPIO support"
1518 select GPIOLIB_IRQCHIP
1520 Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1521 generated when any of the inputs change state (low to high or high to
1522 low). Input filter control is not supported by this driver, and the
1523 input filters are deactivated by this driver.
1525 config GPIO_PCIE_IDIO_24
1526 tristate "ACCES PCIe-IDIO-24 GPIO support"
1527 select GPIOLIB_IRQCHIP
1529 Enables GPIO support for the ACCES PCIe-IDIO-24 family (PCIe-IDIO-24,
1530 PCIe-IDI-24, PCIe-IDO-24, PCIe-IDIO-12). An interrupt is generated
1531 when any of the inputs change state (low to high or high to low).
1532 Input filter control is not supported by this driver, and the input
1533 filters are deactivated by this driver.
1536 tristate "RDC R-321x GPIO support"
1540 Support for the RDC R321x SoC GPIOs over southbridge
1541 PCI configuration space.
1543 config GPIO_SODAVILLE
1544 bool "Intel Sodaville GPIO support"
1545 depends on X86 && OF
1547 select GENERIC_IRQ_CHIP
1549 Say Y here to support Intel Sodaville GPIO.
1553 menu "SPI GPIO expanders"
1554 depends on SPI_MASTER
1557 tristate "74x164 serial-in/parallel-out 8-bits shift register"
1560 Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1561 shift registers. This driver can be used to provide access
1562 to more gpio outputs.
1564 config GPIO_MAX3191X
1565 tristate "Maxim MAX3191x industrial serializer"
1568 GPIO driver for Maxim MAX31910, MAX31911, MAX31912, MAX31913,
1569 MAX31953 and MAX31963 industrial serializer, a daisy-chainable
1570 chip to make 8 digital 24V inputs available via SPI. Supports
1571 CRC checksums to guard against electromagnetic interference,
1572 as well as undervoltage and overtemperature detection.
1575 tristate "Maxim MAX7301 GPIO expander"
1578 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1581 tristate "Freescale MC33880 high-side/low-side switch"
1583 SPI driver for Freescale MC33880 high-side/low-side switch.
1584 This provides GPIO interface supporting inputs and outputs.
1587 tristate "Generic parallel-in/serial-out shift register"
1589 GPIO driver for SPI compatible parallel-in/serial-out shift
1590 registers. These are input only devices.
1593 tristate "EXAR XRA1403 16-bit GPIO expander"
1596 GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1599 tristate "Turris Mox Moxtet bus GPIO expander"
1602 Say yes here if you are building for the Turris Mox router.
1603 This is the driver needed for configuring the GPIOs via the Moxtet
1604 bus. For example the Mox module with SFP cage needs this driver
1605 so that phylink can use corresponding GPIOs.
1609 menu "USB GPIO expanders"
1612 config GPIO_VIPERBOARD
1613 tristate "Viperboard GPIO a & b support"
1614 depends on MFD_VIPERBOARD
1616 Say yes here to access the GPIO signals of Nano River
1617 Technologies Viperboard. There are two GPIO chips on the
1618 board: gpioa and gpiob.
1619 See viperboard API specification and Nano
1620 River Tech's viperboard.h for detailed meaning
1621 of the module parameters.
1625 menu "Virtual GPIO drivers"
1627 config GPIO_AGGREGATOR
1628 tristate "GPIO Aggregator"
1630 Say yes here to enable the GPIO Aggregator, which provides a way to
1631 aggregate existing GPIO lines into a new virtual GPIO chip.
1632 This can serve the following purposes:
1633 - Assign permissions for a collection of GPIO lines to a user,
1634 - Export a collection of GPIO lines to a virtual machine,
1635 - Provide a generic driver for a GPIO-operated device in an
1636 industrial control context, to be operated from userspace using
1637 the GPIO chardev interface.
1640 tristate "GPIO Testing Driver"
1643 This enables GPIO Testing driver, which provides a way to test GPIO
1644 subsystem through sysfs (or char device) and debugfs.
1645 User could use it through the script in
1646 tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in