2 # GPIO infrastructure and drivers
5 config ARCH_HAVE_CUSTOM_GPIO_H
8 Selecting this config option from the architecture Kconfig allows
9 the architecture to provide a custom asm/gpio.h implementation
10 overriding the default implementations. New uses of this are
13 config ARCH_WANT_OPTIONAL_GPIOLIB
16 Select this config option from the architecture Kconfig, if
17 it is possible to use gpiolib on the architecture, but let the
18 user decide whether to actually build it or not.
19 Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
20 not depend on GPIOs being available, but rather let the user
21 decide whether he needs it or not.
23 config ARCH_REQUIRE_GPIOLIB
27 Platforms select gpiolib if they use this infrastructure
28 for all their GPIOs, usually starting with ones integrated
30 Selecting this from the architecture code will cause the gpiolib
31 code to always get built in.
36 depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB
38 This enables GPIO support through the generic GPIO library.
39 You only need to enable this, if you also want to enable
40 one or more of the GPIO drivers below.
58 config GPIOLIB_IRQCHIP
63 bool "Debug GPIO calls"
64 depends on DEBUG_KERNEL
66 Say Y here to add some extra checks and diagnostics to GPIO calls.
67 These checks help ensure that GPIOs have been properly initialized
68 before they are used, and that sleeping calls are not made from
69 non-sleeping contexts. They can make bitbanged serial protocols
70 slower. The diagnostics help catch the type of setup errors
71 that are most common when setting up new platforms or boards.
74 bool "/sys/class/gpio/... (sysfs interface)"
77 Say Y here to add a sysfs interface for GPIOs.
79 This is mostly useful to work around omissions in a system's
80 kernel support. Those are common in custom and semicustom
81 hardware assembled using standard kernels with a minimum of
82 custom patches. In those cases, userspace code may import
83 a given GPIO from the kernel, if no kernel driver requested it.
85 Kernel drivers may also request that a particular GPIO be
86 exported to userspace; this can be useful when debugging.
91 # put drivers in the right section, in alphabetical order
93 # This symbol is selected by both I2C and SPI expanders
97 menu "Memory mapped GPIO drivers"
100 tristate "GPIO driver for 74xx-ICs with MMIO access"
104 Say yes here to support GPIO functionality for 74xx-compatible ICs
105 with MMIO access. Compatible models include:
106 1 bit: 741G125 (Input), 741G74 (Output)
107 2 bits: 742G125 (Input), 7474 (Output)
108 4 bits: 74125 (Input), 74175 (Output)
109 6 bits: 74365 (Input), 74174 (Output)
110 8 bits: 74244 (Input), 74273 (Output)
111 16 bits: 741624 (Input), 7416374 (Output)
114 tristate "Altera GPIO"
116 select GPIOLIB_IRQCHIP
118 Say Y or M here to build support for the Altera PIO device.
120 If driver is built as a module it will be called gpio-altera.
123 tristate "AMD Promontory GPIO support"
126 driver for GPIO functionality on Promontory IOHub
127 Require ACPI ASL code to enumerate as a platform device.
130 bool "Broadcom Kona GPIO"
131 depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
133 Turn on GPIO support for Broadcom "Kona" chips.
136 tristate "BRCMSTB GPIO support"
137 default y if ARCH_BRCMSTB
138 depends on OF_GPIO && (ARCH_BRCMSTB || COMPILE_TEST)
140 select GPIOLIB_IRQCHIP
142 Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
145 tristate "CLPS711X GPIO support"
146 depends on ARCH_CLPS711X || COMPILE_TEST
149 Say yes here to support GPIO on CLPS711X SoCs.
152 bool "TI Davinci/Keystone GPIO support"
153 default y if ARCH_DAVINCI
154 depends on ARM && (ARCH_DAVINCI || ARCH_KEYSTONE)
156 Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
159 tristate "Synopsys DesignWare APB GPIO driver"
161 select GENERIC_IRQ_CHIP
163 Say Y or M here to build support for the Synopsys DesignWare APB
167 tristate "Emma Mobile GPIO"
168 depends on ARM && OF_GPIO
170 Say yes here to support GPIO on Renesas Emma Mobile SoCs.
174 depends on ARCH_EP93XX
178 bool "Axis ETRAX FS General I/O"
179 depends on CRIS || COMPILE_TEST
182 select GPIOLIB_IRQCHIP
184 Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
187 bool "GE FPGA based GPIO"
191 Support for common GPIO functionality provided on some GE Single Board
194 This driver provides basic support (configure as input or output, read
195 and write pin state) for GPIO implemented in a number of GE single
198 config GPIO_GENERIC_PLATFORM
199 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
202 Say yes here to support basic platform_device memory-mapped GPIO controllers.
205 tristate "Aeroflex Gaisler GRGPIO support"
210 Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
211 VHDL IP core library.
214 tristate "Intel ICH GPIO"
215 depends on PCI && X86
219 Say yes here to support the GPIO functionality of a number of Intel
220 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
221 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
222 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
227 tristate "Intel IOP GPIO"
228 depends on ARM && (ARCH_IOP32X || ARCH_IOP33X)
230 Say yes here to support the GPIO functionality of a number of Intel
236 bool "Loongson-2/3 GPIO support"
237 depends on CPU_LOONGSON2 || CPU_LOONGSON3
239 driver for GPIO functionality on Loongson-2F/3A/3B processors.
242 bool "NXP LPC18XX/43XX GPIO support"
243 default y if ARCH_LPC18XX
244 depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
246 Select this option to enable GPIO driver for
247 NXP LPC18XX/43XX devices.
249 config GPIO_LYNXPOINT
250 tristate "Intel Lynxpoint GPIO support"
251 depends on ACPI && X86
252 select GPIOLIB_IRQCHIP
254 driver for GPIO functionality on Intel Lynxpoint PCH chipset
255 Requires ACPI device enumeration code to set up a platform device.
258 bool "GPIO support for Fujitsu MB86S7x Platforms"
259 depends on ARCH_MB86S7X
261 Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
263 config GPIO_MM_LANTIQ
264 bool "Lantiq Memory mapped GPIOs"
265 depends on LANTIQ && SOC_XWAY
267 This enables support for memory mapped GPIOs on the External Bus Unit
268 (EBU) found on Lantiq SoCs. The gpios are output only as they are
269 created by attaching a 16bit latch to the bus.
272 bool "MOXART GPIO support"
273 depends on ARCH_MOXART
276 Select this option to enable GPIO driver for
277 MOXA ART SoC devices.
281 depends on PPC_MPC52xx
284 bool "MPC512x/MPC8xxx GPIO support"
285 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
286 FSL_SOC_BOOKE || PPC_86xx
288 Say Y here if you're going to use hardware that connects to the
289 MPC512x/831x/834x/837x/8572/8610 GPIOs.
293 depends on PLAT_ORION
295 select GENERIC_IRQ_CHIP
301 select GENERIC_IRQ_CHIP
307 select GENERIC_IRQ_CHIP
310 tristate "Cavium OCTEON GPIO"
311 depends on GPIOLIB && CAVIUM_OCTEON_SOC
314 Say yes here to support the on-chip GPIO lines on the OCTEON
318 tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
319 default y if ARCH_OMAP
321 select GENERIC_IRQ_CHIP
322 select GPIOLIB_IRQCHIP
324 Say yes here to enable GPIO support for TI OMAP SoCs.
327 bool "PrimeCell PL061 GPIO support"
330 select GPIOLIB_IRQCHIP
332 Say yes here to support the PrimeCell PL061 GPIO device
335 bool "PXA GPIO support"
336 depends on ARCH_PXA || ARCH_MMP
338 Say yes here to support the PXA GPIO device
341 tristate "Renesas R-Car GPIO"
342 depends on ARCH_SHMOBILE || COMPILE_TEST
343 select GPIOLIB_IRQCHIP
345 Say yes here to support GPIO on Renesas R-Car SoCs.
349 depends on PLAT_SAMSUNG
351 Legacy GPIO support. Use only for platforms without support for
354 config GPIO_SPEAR_SPICS
355 bool "ST SPEAr13xx SPI Chip Select as GPIO support"
356 depends on PLAT_SPEAR
357 select GENERIC_IRQ_CHIP
359 Say yes here to support ST SPEAr SPI Chip Select as GPIO device
362 bool "STA2x11/ConneXt GPIO support"
363 depends on MFD_STA2X11
364 select GENERIC_IRQ_CHIP
366 Say yes here to support the STA2x11/ConneXt GPIO device.
367 The GPIO module has 128 GPIO pins with alternate functions.
370 bool "XWAY STP GPIOs"
373 This enables support for the Serial To Parallel (STP) unit found on
374 XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
375 that can be up to 24 bit. This peripheral is aimed at driving leds.
376 Some of the gpios/leds can be auto updated by the soc with dsl and
380 tristate "GPIO based on SYSCON"
381 depends on MFD_SYSCON && OF
383 Say yes here to support GPIO functionality though SYSCON driver.
387 select GENERIC_IRQ_CHIP
391 bool "Toumaz Xenif TZ1090 GPIO support"
392 depends on SOC_TZ1090
393 select GENERIC_IRQ_CHIP
396 Say yes here to support Toumaz Xenif TZ1090 GPIOs.
398 config GPIO_TZ1090_PDC
399 bool "Toumaz Xenif TZ1090 PDC GPIO support"
400 depends on SOC_TZ1090
403 Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs.
407 depends on ARCH_MXC && SOC_VF610
408 select GPIOLIB_IRQCHIP
410 Say yes here to support Vybrid vf610 GPIOs.
413 tristate "NEC VR4100 series General-purpose I/O Uint support"
414 depends on CPU_VR41XX
416 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
419 tristate "VIA VX855/VX875 GPIO"
424 Support access to the VX855/VX875 GPIO lines through the gpio library.
426 This driver provides common support for accessing the device,
427 additional drivers must be enabled in order to use the
428 functionality of the device.
431 bool "APM X-Gene GPIO controller support"
432 depends on ARM64 && OF_GPIO
434 This driver is to support the GPIO block within the APM X-Gene SoC
435 platform's generic flash controller. The GPIO pins are muxed with
436 the generic flash controller's address and data pins. Say yes
437 here to enable the GFC GPIO functionality.
440 tristate "APM X-Gene GPIO standby controller support"
441 depends on ARCH_XGENE && OF_GPIO
444 This driver supports the GPIO block within the APM X-Gene
445 Standby Domain. Say yes here to enable the GPIO functionality.
448 tristate "Xilinx GPIO support"
451 Say yes here to support the Xilinx FPGA GPIO device
454 tristate "Netlogic XLP GPIO support"
455 depends on CPU_XLP && OF_GPIO
456 select GPIOLIB_IRQCHIP
458 This driver provides support for GPIO interface on Netlogic XLP MIPS64
459 SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
465 bool "Xtensa GPIO32 support"
467 depends on HAVE_XTENSA_GPIO32
470 Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
471 and EXPSTATE (output) ports
474 bool "LSI ZEVIO SoC memory mapped GPIOs"
475 depends on ARM && OF_GPIO
477 Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
480 tristate "Xilinx Zynq GPIO support"
481 depends on ARCH_ZYNQ || ARCH_ZYNQMP
482 select GPIOLIB_IRQCHIP
484 Say yes here to support Xilinx Zynq GPIO controller.
488 menu "Port-mapped I/O GPIO drivers"
491 config GPIO_104_IDIO_16
492 tristate "ACCES 104-IDIO-16 GPIO support"
495 Enables GPIO support for the ACCES 104-IDIO-16 family.
498 tristate "F71869, F71869A, F71882FG and F71889F GPIO support"
501 This option enables support for GPIOs found on Fintek Super-I/O
502 chips F71869, F71869A, F71882FG and F71889F.
504 To compile this driver as a module, choose M here: the module will
505 be called f7188x-gpio.
508 tristate "IT87xx GPIO support"
509 depends on X86 # unconditional access to IO space.
511 Say yes here to support GPIO functionality of IT87xx Super I/O chips.
513 This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
514 supports the IT8761E Super I/O chip as well.
516 To compile this driver as a module, choose M here: the module will
520 tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
521 depends on PCI && X86
525 Say yes here to support GPIO interface on Intel Poulsbo SCH,
526 Intel Tunnel Creek processor, Intel Centerton processor or
527 Intel Quark X1000 SoC.
529 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
530 powered by the core power rail and are turned off during sleep
531 modes (S3 and higher). The remaining four GPIOs are powered by
532 the Intel SCH suspend power supply. These GPIOs remain
533 active during S3. The suspend powered GPIOs can be used to wake the
534 system from the Suspend-to-RAM state.
536 The Intel Tunnel Creek processor has 5 GPIOs powered by the
537 core power rail and 9 from suspend power supply.
539 The Intel Centerton processor has a total of 30 GPIO pins.
540 Twenty-one are powered by the core power rail and 9 from the
541 suspend power supply.
543 The Intel Quark X1000 SoC has 2 GPIOs powered by the core
544 power well and 6 from the suspend power well.
547 tristate "SMSC SCH311x SuperI/O GPIO"
549 Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
550 SCH3116 "Super I/O" chipsets.
552 To compile this driver as a module, choose M here: the module will
553 be called gpio-sch311x.
556 tristate "TS-5500 DIO blocks and compatibles"
557 depends on TS5500 || COMPILE_TEST
559 This driver supports Digital I/O exposed by pin blocks found on some
560 Technologic Systems platforms. It includes, but is not limited to, 3
561 blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
566 menu "I2C GPIO expanders"
570 tristate "ADP5588 I2C GPIO expander"
573 This option enables support for 18 GPIOs found
574 on Analog Devices ADP5588 GPIO Expanders.
576 config GPIO_ADP5588_IRQ
577 bool "Interrupt controller support for ADP5588"
578 depends on GPIO_ADP5588=y
580 Say yes here to enable the adp5588 to be used as an interrupt
581 controller. It requires the driver to be built in the kernel.
584 tristate "Avionic Design N-bit GPIO expander"
585 depends on I2C && OF_GPIO
586 select GPIOLIB_IRQCHIP
588 This option enables support for N GPIOs found on Avionic Design
589 I2C GPIO expanders. The register space will be extended by powers
590 of two, so the controller will need to accommodate for that. For
591 example: if a controller provides 48 pins, 6 registers will be
592 enough to represent all pins, but the driver will assume a
593 register layout for 64 pins (8 registers).
596 tristate "Maxim MAX7300 GPIO expander"
600 GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
603 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
606 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
607 Port Expanders. Each IO port on these chips has a fixed role of
608 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
609 Input and Output (designed by 'P'). The combinations are listed
612 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
613 max7322 (4I4O), max7323 (4P4O)
615 16 bits: max7324 (8I8O), max7325 (8P8O),
616 max7326 (4I12O), max7327 (4P12O)
618 Board setup code must specify the model to use, and the start
619 number for these GPIOs.
621 config GPIO_MAX732X_IRQ
622 bool "Interrupt controller support for MAX732x"
623 depends on GPIO_MAX732X=y
624 select GPIOLIB_IRQCHIP
626 Say yes here to enable the max732x to be used as an interrupt
627 controller. It requires the driver to be built in the kernel.
629 config GPIO_MC9S08DZ60
630 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
631 depends on I2C=y && MACH_MX35_3DS
633 Select this to enable the MC9S08DZ60 GPIO driver
636 tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
639 Say yes here to provide access to several register-oriented
640 SMBus I/O expanders, made mostly by NXP or TI. Compatible
643 4 bits: pca9536, pca9537
645 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554,
646 pca9556, pca9557, pca9574, tca6408, xra1202
648 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575,
653 40 bits: pca9505, pca9698
655 config GPIO_PCA953X_IRQ
656 bool "Interrupt controller support for PCA953x"
657 depends on GPIO_PCA953X=y
658 select GPIOLIB_IRQCHIP
660 Say yes here to enable the pca953x to be used as an interrupt
661 controller. It requires the driver to be built in the kernel.
664 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
666 select GPIOLIB_IRQCHIP
669 Say yes here to provide access to most "quasi-bidirectional" I2C
670 GPIO expanders used for additional digital outputs or inputs.
671 Most of these parts are from NXP, though TI is a second source for
672 some of them. Compatible models include:
674 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
675 pca9670, pca9672, pca9674, pca9674a,
678 16 bits: pcf8575, pcf8575c, pca8575,
679 pca9671, pca9673, pca9675
681 Your board setup code will need to declare the expanders in
682 use, and assign numbers to the GPIOs they expose. Those GPIOs
683 can then be used from drivers and other kernel code, just like
684 other GPIOs, but only accessible from task contexts.
686 This driver provides an in-kernel interface to those GPIOs using
687 platform-neutral GPIO calls.
690 bool "Semtech SX150x I2C GPIO expander"
692 select GPIOLIB_IRQCHIP
695 Say yes here to provide support for Semtech SX150-series I2C
696 GPIO expanders. Compatible models include:
703 menu "MFD GPIO expanders"
706 tristate "GPIO Support for ADP5520 PMIC"
707 depends on PMIC_ADP5520
709 This option enables support for on-chip GPIO found
710 on Analog Devices ADP5520 PMICs.
713 tristate "Wolfson Microelectronics Arizona class devices"
714 depends on MFD_ARIZONA
716 Support for GPIOs on Wolfson Arizona class devices.
718 config GPIO_CRYSTAL_COVE
719 tristate "GPIO support for Crystal Cove PMIC"
720 depends on INTEL_SOC_PMIC
721 select GPIOLIB_IRQCHIP
723 Support for GPIO pins on Crystal Cove PMIC.
725 Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
728 This driver can also be built as a module. If so, the module will be
729 called gpio-crystalcove.
732 tristate "AMD CS5535/CS5536 GPIO support"
733 depends on MFD_CS5535
735 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
736 can be used for quite a number of things. The CS5535/6 is found on
737 AMD Geode and Lemote Yeeloong devices.
742 tristate "Dialog DA9052 GPIO"
743 depends on PMIC_DA9052
745 Say yes here to enable the GPIO driver for the DA9052 chip.
748 tristate "Dialog Semiconductor DA9055 GPIO"
749 depends on MFD_DA9055
751 Say yes here to enable the GPIO driver for the DA9055 chip.
753 The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
754 be controller by this driver.
756 If driver is built as a module it will be called gpio-da9055.
759 tristate "Diolan DLN2 GPIO support"
761 select GPIOLIB_IRQCHIP
764 Select this option to enable GPIO driver for the Diolan DLN2
767 This driver can also be built as a module. If so, the module
768 will be called gpio-dln2.
771 tristate "Janz VMOD-TTL Digital IO Module"
772 depends on MFD_JANZ_CMODIO
774 This enables support for the Janz VMOD-TTL Digital IO module.
775 This driver provides support for driving the pins in output
776 mode only. Input mode is not supported.
779 tristate "Kontron ETX / COMexpress GPIO"
780 depends on MFD_KEMPLD
782 This enables support for the PLD GPIO interface on some Kontron ETX
783 and COMexpress (ETXexpress) modules.
785 This driver can also be built as a module. If so, the module will be
789 tristate "TI/National Semiconductor LP3943 GPIO expander"
790 depends on MFD_LP3943
792 GPIO driver for LP3943 MFD.
793 LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
794 Open drain outputs are required for this usage.
797 bool "Intel MSIC mixed signal gpio support"
798 depends on MFD_INTEL_MSIC
800 Enable support for GPIO on intel MSIC controllers found in
804 bool "TI PALMAS series PMICs GPIO"
805 depends on MFD_PALMAS
807 Select this option to enable GPIO driver for the TI PALMAS
811 bool "RICOH RC5T583 GPIO"
812 depends on MFD_RC5T583
814 Select this option to enable GPIO driver for the Ricoh RC5T583
816 This driver provides the support for driving/reading the gpio pins
817 of RC5T583 device through standard gpio library.
823 select GPIOLIB_IRQCHIP
825 This enables support for the GPIOs found on the STMPE I/O
830 depends on MFD_TC3589X
832 select GPIOLIB_IRQCHIP
834 This enables support for the GPIOs found on the TC3589X
837 config GPIO_TIMBERDALE
838 bool "Support for timberdale GPIO IP"
839 depends on MFD_TIMBERDALE
841 Add support for the GPIO IP in the timberdale FPGA.
845 depends on MFD_TPS6586X
847 Select this option to enable GPIO driver for the TPS6586X
852 depends on MFD_TPS65910
854 Select this option to enable GPIO driver for the TPS65910
858 tristate "TI TPS65912 GPIO"
859 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
861 This driver supports TPS65912 gpio chip
864 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
865 depends on TWL4030_CORE
867 Say yes here to access the GPIO signals of various multi-function
868 power management chips from Texas Instruments.
871 tristate "TWL6040 GPO"
872 depends on TWL6040_CORE
874 Say yes here to access the GPO signals of twl6040
875 audio chip from Texas Instruments.
878 tristate "Philips UCB1400 GPIO"
879 depends on UCB1400_CORE
881 This enables support for the Philips UCB1400 GPIO pins.
882 The UCB1400 is an AC97 audio codec.
885 tristate "WM831x GPIOs"
886 depends on MFD_WM831X
888 Say yes here to access the GPIO signals of WM831x power management
889 chips from Wolfson Microelectronics.
892 tristate "WM8350 GPIOs"
893 depends on MFD_WM8350
895 Say yes here to access the GPIO signals of WM8350 power management
896 chips from Wolfson Microelectronics.
899 tristate "WM8994 GPIOs"
900 depends on MFD_WM8994
902 Say yes here to access the GPIO signals of WM8994 audio hub
903 CODECs from Wolfson Microelectronics.
907 menu "PCI GPIO expanders"
911 tristate "AMD 8111 GPIO driver"
914 The AMD 8111 south bridge contains 32 GPIO pins which can be used.
916 Note, that usually system firmware/ACPI handles GPIO pins on their
917 own and users might easily break their systems with uncarefull usage
923 tristate "BT8XX GPIO abuser"
924 depends on PCI && VIDEO_BT848=n
926 The BT8xx frame grabber chip has 24 GPIO pins that can be abused
927 as a cheap PCI GPIO card.
929 This chip can be found on Miro, Hauppauge and STB TV-cards.
931 The card needs to be physically altered for using it as a
932 GPIO card. For more information on how to build a GPIO card
933 from a BT8xx TV card, see the documentation file at
934 Documentation/bt8xxgpio.txt
938 config GPIO_INTEL_MID
939 bool "Intel Mid GPIO support"
940 depends on PCI && X86
941 select GPIOLIB_IRQCHIP
943 Say Y here to support Intel Mid GPIO.
946 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
948 select GENERIC_IRQ_CHIP
950 ML7213 is companion chip for Intel Atom E6xx series.
951 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
952 Hub) which is for IVI(In-Vehicle Infotainment) use.
953 This driver can access the IOH's GPIO device.
956 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
957 depends on PCI && (X86_32 || COMPILE_TEST)
958 select GENERIC_IRQ_CHIP
960 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
961 which is an IOH(Input/Output Hub) for x86 embedded processor.
962 This driver can access PCH GPIO device.
964 This driver also can be used for LAPIS Semiconductor IOH(Input/
965 Output Hub), ML7223 and ML7831.
966 ML7223 IOH is for MP(Media Phone) use.
967 ML7831 IOH is for general purpose use.
968 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
969 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
972 tristate "RDC R-321x GPIO support"
977 Support for the RDC R321x SoC GPIOs over southbridge
978 PCI configuration space.
980 config GPIO_SODAVILLE
981 bool "Intel Sodaville GPIO support"
982 depends on X86 && PCI && OF
984 select GENERIC_IRQ_CHIP
986 Say Y here to support Intel Sodaville GPIO.
990 menu "SPI GPIO expanders"
991 depends on SPI_MASTER
994 tristate "74x164 serial-in/parallel-out 8-bits shift register"
995 depends on SPI_MASTER && OF
997 Driver for 74x164 compatible serial-in/parallel-out 8-outputs
998 shift registers. This driver can be used to provide access
999 to more gpio outputs.
1002 tristate "Maxim MAX7301 GPIO expander"
1003 depends on SPI_MASTER
1006 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1008 config GPIO_MCP23S08
1009 tristate "Microchip MCP23xxx I/O expander"
1010 depends on (SPI_MASTER && !I2C) || I2C
1012 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
1014 This provides a GPIO interface supporting inputs and outputs.
1015 The I2C versions of the chips can be used as interrupt-controller.
1018 tristate "Freescale MC33880 high-side/low-side switch"
1019 depends on SPI_MASTER
1021 SPI driver for Freescale MC33880 high-side/low-side switch.
1022 This provides GPIO interface supporting inputs and outputs.
1025 bool "ZTE ZX GPIO support"
1026 select GPIOLIB_IRQCHIP
1028 Say yes here to support the GPIO device on ZTE ZX SoCs.
1032 menu "USB GPIO expanders"
1035 config GPIO_VIPERBOARD
1036 tristate "Viperboard GPIO a & b support"
1037 depends on MFD_VIPERBOARD && USB
1039 Say yes here to access the GPIO signals of Nano River
1040 Technologies Viperboard. There are two GPIO chips on the
1041 board: gpioa and gpiob.
1042 See viperboard API specification and Nano
1043 River Tech's viperboard.h for detailed meaning
1044 of the module parameters.