drivers/gpio/Kconfig

   1 #
   2 # GPIO infrastructure and drivers
   3 #
   4
   5 config ARCH_HAVE_CUSTOM_GPIO_H
   6         bool
   7         help
   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
  11           strongly discouraged.
  12
  13 menuconfig GPIOLIB
  14         bool "GPIO Support"
  15         select ANON_INODES
  16         help
  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.
  20
  21           If unsure, say N.
  22
  23 if GPIOLIB
  24
  25 config OF_GPIO
  26         def_bool y
  27         depends on OF
  28         depends on HAS_IOMEM
  29
  30 config GPIO_ACPI
  31         def_bool y
  32         depends on ACPI
  33
  34 config GPIOLIB_IRQCHIP
  35         select IRQ_DOMAIN
  36         bool
  37
  38 config DEBUG_GPIO
  39         bool "Debug GPIO calls"
  40         depends on DEBUG_KERNEL
  41         help
  42           Say Y here to add some extra checks and diagnostics to GPIO calls.
  43           These checks help ensure that GPIOs have been properly initialized
  44           before they are used, and that sleeping calls are not made from
  45           non-sleeping contexts.  They can make bitbanged serial protocols
  46           slower.  The diagnostics help catch the type of setup errors
  47           that are most common when setting up new platforms or boards.
  48
  49 config GPIO_SYSFS
  50         bool "/sys/class/gpio/... (sysfs interface)"
  51         depends on SYSFS
  52         help
  53           Say Y here to add a sysfs interface for GPIOs.
  54
  55           This is mostly useful to work around omissions in a system's
  56           kernel support.  Those are common in custom and semicustom
  57           hardware assembled using standard kernels with a minimum of
  58           custom patches.  In those cases, userspace code may import
  59           a given GPIO from the kernel, if no kernel driver requested it.
  60
  61           Kernel drivers may also request that a particular GPIO be
  62           exported to userspace; this can be useful when debugging.
  63
  64 config GPIO_GENERIC
  65         depends on HAS_IOMEM # Only for IOMEM drivers
  66         tristate
  67
  68 # put drivers in the right section, in alphabetical order
  69
  70 # This symbol is selected by both I2C and SPI expanders
  71 config GPIO_MAX730X
  72         tristate
  73
  74 menu "Memory mapped GPIO drivers"
  75         depends on HAS_IOMEM
  76
  77 config GPIO_74XX_MMIO
  78         tristate "GPIO driver for 74xx-ICs with MMIO access"
  79         depends on OF_GPIO
  80         select GPIO_GENERIC
  81         help
  82           Say yes here to support GPIO functionality for 74xx-compatible ICs
  83           with MMIO access. Compatible models include:
  84             1 bit:      741G125 (Input), 741G74 (Output)
  85             2 bits:     742G125 (Input), 7474 (Output)
  86             4 bits:     74125 (Input), 74175 (Output)
  87             6 bits:     74365 (Input), 74174 (Output)
  88             8 bits:     74244 (Input), 74273 (Output)
  89             16 bits:    741624 (Input), 7416374 (Output)
  90
  91 config GPIO_ALTERA
  92         tristate "Altera GPIO"
  93         depends on OF_GPIO
  94         select GPIOLIB_IRQCHIP
  95         help
  96           Say Y or M here to build support for the Altera PIO device.
  97
  98           If driver is built as a module it will be called gpio-altera.
  99
 100 config GPIO_AMDPT
 101         tristate "AMD Promontory GPIO support"
 102         depends on ACPI
 103         select GPIO_GENERIC
 104         help
 105           driver for GPIO functionality on Promontory IOHub
 106           Require ACPI ASL code to enumerate as a platform device.
 107
 108 config GPIO_ASPEED
 109         tristate "Aspeed GPIO support"
 110         depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
 111         select GPIOLIB_IRQCHIP
 112         help
 113           Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.
 114
 115 config GPIO_ATH79
 116         tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
 117         default y if ATH79
 118         depends on ATH79 || COMPILE_TEST
 119         select GPIO_GENERIC
 120         select GPIOLIB_IRQCHIP
 121         help
 122           Select this option to enable GPIO driver for
 123           Atheros AR71XX/AR724X/AR913X SoC devices.
 124
 125 config GPIO_AXP209
 126         tristate "X-Powers AXP209 PMIC GPIO Support"
 127         depends on MFD_AXP20X
 128         help
 129           Say yes to enable GPIO support for the AXP209 PMIC
 130
 131 config GPIO_BCM_KONA
 132         bool "Broadcom Kona GPIO"
 133         depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
 134         help
 135           Turn on GPIO support for Broadcom "Kona" chips.
 136
 137 config GPIO_BRCMSTB
 138         tristate "BRCMSTB GPIO support"
 139         default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
 140         depends on OF_GPIO && (ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST)
 141         select GPIO_GENERIC
 142         select GPIOLIB_IRQCHIP
 143         help
 144           Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
 145
 146 config GPIO_CLPS711X
 147         tristate "CLPS711X GPIO support"
 148         depends on ARCH_CLPS711X || COMPILE_TEST
 149         select GPIO_GENERIC
 150         help
 151           Say yes here to support GPIO on CLPS711X SoCs.
 152
 153 config GPIO_DAVINCI
 154         bool "TI Davinci/Keystone GPIO support"
 155         default y if ARCH_DAVINCI
 156         depends on ARM && (ARCH_DAVINCI || ARCH_KEYSTONE)
 157         help
 158           Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
 159
 160 config GPIO_DWAPB
 161         tristate "Synopsys DesignWare APB GPIO driver"
 162         select GPIO_GENERIC
 163         select GENERIC_IRQ_CHIP
 164         help
 165           Say Y or M here to build support for the Synopsys DesignWare APB
 166           GPIO block.
 167
 168 config GPIO_EM
 169         tristate "Emma Mobile GPIO"
 170         depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
 171         help
 172           Say yes here to support GPIO on Renesas Emma Mobile SoCs.
 173
 174 config GPIO_EP93XX
 175         def_bool y
 176         depends on ARCH_EP93XX
 177         select GPIO_GENERIC
 178
 179 config GPIO_ETRAXFS
 180         bool "Axis ETRAX FS General I/O"
 181         depends on CRIS || COMPILE_TEST
 182         depends on OF_GPIO
 183         select GPIO_GENERIC
 184         select GPIOLIB_IRQCHIP
 185         help
 186           Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
 187
 188 config GPIO_EXAR
 189         tristate "Support for GPIO pins on XR17V352/354/358"
 190         depends on SERIAL_8250_EXAR
 191         help
 192           Selecting this option will enable handling of GPIO pins present
 193           on Exar XR17V352/354/358 chips.
 194
 195 config GPIO_GE_FPGA
 196         bool "GE FPGA based GPIO"
 197         depends on GE_FPGA
 198         select GPIO_GENERIC
 199         help
 200           Support for common GPIO functionality provided on some GE Single Board
 201           Computers.
 202
 203           This driver provides basic support (configure as input or output, read
 204           and write pin state) for GPIO implemented in a number of GE single
 205           board computers.
 206
 207 config GPIO_FTGPIO010
 208         bool "Faraday FTGPIO010 GPIO"
 209         depends on OF_GPIO
 210         select GPIO_GENERIC
 211         select GPIOLIB_IRQCHIP
 212         default (ARCH_GEMINI || ARCH_MOXART)
 213         help
 214           Support for common GPIOs from the Faraday FTGPIO010 IP core, found in
 215           Cortina systems Gemini platforms, Moxa ART and others.
 216
 217 config GPIO_GENERIC_PLATFORM
 218         tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
 219         select GPIO_GENERIC
 220         help
 221           Say yes here to support basic platform_device memory-mapped GPIO controllers.
 222
 223 config GPIO_GRGPIO
 224         tristate "Aeroflex Gaisler GRGPIO support"
 225         depends on OF_GPIO
 226         select GPIO_GENERIC
 227         select IRQ_DOMAIN
 228         help
 229           Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
 230           VHDL IP core library.
 231
 232 config GPIO_ICH
 233         tristate "Intel ICH GPIO"
 234         depends on PCI && X86
 235         select MFD_CORE
 236         select LPC_ICH
 237         help
 238           Say yes here to support the GPIO functionality of a number of Intel
 239           ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8
 240           ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg
 241           Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
 242
 243           If unsure, say N.
 244
 245 config GPIO_INGENIC
 246         tristate "Ingenic JZ47xx SoCs GPIO support"
 247         depends on OF
 248         depends on MACH_INGENIC || COMPILE_TEST
 249         select GPIOLIB_IRQCHIP
 250         help
 251           Say yes here to support the GPIO functionality present on the
 252           JZ4740 and JZ4780 SoCs from Ingenic.
 253
 254           If unsure, say N.
 255
 256 config GPIO_IOP
 257         tristate "Intel IOP GPIO"
 258         depends on ARCH_IOP32X || ARCH_IOP33X || COMPILE_TEST
 259         select GPIO_GENERIC
 260         help
 261           Say yes here to support the GPIO functionality of a number of Intel
 262           IOP32X or IOP33X.
 263
 264           If unsure, say N.
 265
 266 config GPIO_LOONGSON
 267         bool "Loongson-2/3 GPIO support"
 268         depends on CPU_LOONGSON2 || CPU_LOONGSON3
 269         help
 270           driver for GPIO functionality on Loongson-2F/3A/3B processors.
 271
 272 config GPIO_LPC18XX
 273         tristate "NXP LPC18XX/43XX GPIO support"
 274         default y if ARCH_LPC18XX
 275         depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
 276         help
 277           Select this option to enable GPIO driver for
 278           NXP LPC18XX/43XX devices.
 279
 280 config GPIO_LYNXPOINT
 281         tristate "Intel Lynxpoint GPIO support"
 282         depends on ACPI && X86
 283         select GPIOLIB_IRQCHIP
 284         help
 285           driver for GPIO functionality on Intel Lynxpoint PCH chipset
 286           Requires ACPI device enumeration code to set up a platform device.
 287
 288 config GPIO_MB86S7X
 289         bool "GPIO support for Fujitsu MB86S7x Platforms"
 290         depends on ARCH_MB86S7X || COMPILE_TEST
 291         help
 292           Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
 293
 294 config GPIO_MENZ127
 295         tristate "MEN 16Z127 GPIO support"
 296         depends on MCB
 297         select GPIO_GENERIC
 298         help
 299          Say yes here to support the MEN 16Z127 GPIO Controller
 300
 301 config GPIO_MM_LANTIQ
 302         bool "Lantiq Memory mapped GPIOs"
 303         depends on LANTIQ && SOC_XWAY
 304         help
 305           This enables support for memory mapped GPIOs on the External Bus Unit
 306           (EBU) found on Lantiq SoCs. The gpios are output only as they are
 307           created by attaching a 16bit latch to the bus.
 308
 309 config GPIO_MOCKUP
 310         tristate "GPIO Testing Driver"
 311         depends on GPIOLIB && SYSFS
 312         select GPIO_SYSFS
 313         select GPIOLIB_IRQCHIP
 314         select IRQ_WORK
 315         help
 316           This enables GPIO Testing driver, which provides a way to test GPIO
 317           subsystem through sysfs(or char device) and debugfs. GPIO_SYSFS
 318           must be selected for this test.
 319           User could use it through the script in
 320           tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in
 321           it.
 322
 323 config GPIO_MPC5200
 324         def_bool y
 325         depends on PPC_MPC52xx
 326
 327 config GPIO_MPC8XXX
 328         bool "MPC512x/MPC8xxx/QorIQ GPIO support"
 329         depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
 330                    FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
 331                    COMPILE_TEST
 332         select GPIO_GENERIC
 333         select IRQ_DOMAIN
 334         help
 335           Say Y here if you're going to use hardware that connects to the
 336           MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
 337
 338 config GPIO_MVEBU
 339         def_bool y
 340         depends on PLAT_ORION || ARCH_MVEBU
 341         depends on OF_GPIO
 342         select GENERIC_IRQ_CHIP
 343         select REGMAP_MMIO
 344
 345 config GPIO_MXC
 346         def_bool y
 347         depends on ARCH_MXC
 348         select GPIO_GENERIC
 349         select GENERIC_IRQ_CHIP
 350
 351 config GPIO_MXS
 352         def_bool y
 353         depends on ARCH_MXS
 354         select GPIO_GENERIC
 355         select GENERIC_IRQ_CHIP
 356
 357 config GPIO_OCTEON
 358         tristate "Cavium OCTEON GPIO"
 359         depends on GPIOLIB && CAVIUM_OCTEON_SOC
 360         default y
 361         help
 362           Say yes here to support the on-chip GPIO lines on the OCTEON
 363           family of SOCs.
 364
 365 config GPIO_OMAP
 366         tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
 367         default y if ARCH_OMAP
 368         depends on ARM
 369         select GENERIC_IRQ_CHIP
 370         select GPIOLIB_IRQCHIP
 371         help
 372           Say yes here to enable GPIO support for TI OMAP SoCs.
 373
 374 config GPIO_PL061
 375         bool "PrimeCell PL061 GPIO support"
 376         depends on ARM_AMBA
 377         select IRQ_DOMAIN
 378         select GPIOLIB_IRQCHIP
 379         help
 380           Say yes here to support the PrimeCell PL061 GPIO device
 381
 382 config GPIO_PXA
 383         bool "PXA GPIO support"
 384         depends on ARCH_PXA || ARCH_MMP
 385         help
 386           Say yes here to support the PXA GPIO device
 387
 388 config GPIO_RCAR
 389         tristate "Renesas R-Car GPIO"
 390         depends on ARCH_RENESAS || COMPILE_TEST
 391         select GPIOLIB_IRQCHIP
 392         help
 393           Say yes here to support GPIO on Renesas R-Car SoCs.
 394
 395 config GPIO_REG
 396         bool
 397         help
 398           A 32-bit single register GPIO fixed in/out implementation.  This
 399           can be used to represent any register as a set of GPIO signals.
 400
 401 config GPIO_SPEAR_SPICS
 402         bool "ST SPEAr13xx SPI Chip Select as GPIO support"
 403         depends on PLAT_SPEAR
 404         select GENERIC_IRQ_CHIP
 405         help
 406           Say yes here to support ST SPEAr SPI Chip Select as GPIO device
 407
 408 config GPIO_STA2X11
 409         bool "STA2x11/ConneXt GPIO support"
 410         depends on MFD_STA2X11
 411         select GENERIC_IRQ_CHIP
 412         help
 413           Say yes here to support the STA2x11/ConneXt GPIO device.
 414           The GPIO module has 128 GPIO pins with alternate functions.
 415
 416 config GPIO_STP_XWAY
 417         bool "XWAY STP GPIOs"
 418         depends on SOC_XWAY
 419         help
 420           This enables support for the Serial To Parallel (STP) unit found on
 421           XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
 422           that can be up to 24 bit. This peripheral is aimed at driving leds.
 423           Some of the gpios/leds can be auto updated by the soc with dsl and
 424           phy status.
 425
 426 config GPIO_SYSCON
 427         tristate "GPIO based on SYSCON"
 428         depends on MFD_SYSCON && OF
 429         help
 430           Say yes here to support GPIO functionality though SYSCON driver.
 431
 432 config GPIO_TB10X
 433         bool
 434         select GENERIC_IRQ_CHIP
 435         select OF_GPIO
 436
 437 config GPIO_TEGRA
 438         bool "NVIDIA Tegra GPIO support"
 439         default ARCH_TEGRA
 440         depends on ARCH_TEGRA || COMPILE_TEST
 441         depends on OF_GPIO
 442         help
 443           Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
 444
 445 config GPIO_TS4800
 446         tristate "TS-4800 DIO blocks and compatibles"
 447         depends on OF_GPIO
 448         depends on SOC_IMX51 || COMPILE_TEST
 449         select GPIO_GENERIC
 450         help
 451           This driver support TS-4800 FPGA GPIO controllers.
 452
 453 config GPIO_TZ1090
 454         bool "Toumaz Xenif TZ1090 GPIO support"
 455         depends on SOC_TZ1090
 456         select GENERIC_IRQ_CHIP
 457         default y
 458         help
 459           Say yes here to support Toumaz Xenif TZ1090 GPIOs.
 460
 461 config GPIO_TZ1090_PDC
 462         bool "Toumaz Xenif TZ1090 PDC GPIO support"
 463         depends on SOC_TZ1090
 464         default y
 465         help
 466           Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs.
 467
 468 config GPIO_VF610
 469         def_bool y
 470         depends on ARCH_MXC && SOC_VF610
 471         select GPIOLIB_IRQCHIP
 472         help
 473           Say yes here to support Vybrid vf610 GPIOs.
 474
 475 config GPIO_VR41XX
 476         tristate "NEC VR4100 series General-purpose I/O Uint support"
 477         depends on CPU_VR41XX
 478         help
 479           Say yes here to support the NEC VR4100 series General-purpose I/O Uint
 480
 481 config GPIO_VX855
 482         tristate "VIA VX855/VX875 GPIO"
 483         depends on (X86 || COMPILE_TEST) && PCI
 484         select MFD_CORE
 485         select MFD_VX855
 486         help
 487           Support access to the VX855/VX875 GPIO lines through the gpio library.
 488
 489           This driver provides common support for accessing the device,
 490           additional drivers must be enabled in order to use the
 491           functionality of the device.
 492
 493 config GPIO_XGENE
 494         bool "APM X-Gene GPIO controller support"
 495         depends on ARM64 && OF_GPIO
 496         help
 497           This driver is to support the GPIO block within the APM X-Gene SoC
 498           platform's generic flash controller. The GPIO pins are muxed with
 499           the generic flash controller's address and data pins. Say yes
 500           here to enable the GFC GPIO functionality.
 501
 502 config GPIO_XGENE_SB
 503         tristate "APM X-Gene GPIO standby controller support"
 504         depends on ARCH_XGENE && OF_GPIO
 505         select GPIO_GENERIC
 506         select GPIOLIB_IRQCHIP
 507         help
 508           This driver supports the GPIO block within the APM X-Gene
 509           Standby Domain. Say yes here to enable the GPIO functionality.
 510
 511 config GPIO_XILINX
 512         tristate "Xilinx GPIO support"
 513         depends on OF_GPIO
 514         help
 515           Say yes here to support the Xilinx FPGA GPIO device
 516
 517 config GPIO_XLP
 518         tristate "Netlogic XLP GPIO support"
 519         depends on OF_GPIO && (CPU_XLP || ARCH_THUNDER2 || COMPILE_TEST)
 520         select GPIOLIB_IRQCHIP
 521         help
 522           This driver provides support for GPIO interface on Netlogic XLP MIPS64
 523           SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
 524           XLP9XX and XLP5XX. The same GPIO controller block is also present in
 525           Cavium's ThunderX2 CN99XX SoCs.
 526
 527           If unsure, say N.
 528
 529 config GPIO_XTENSA
 530         bool "Xtensa GPIO32 support"
 531         depends on XTENSA
 532         depends on HAVE_XTENSA_GPIO32
 533         depends on !SMP
 534         help
 535           Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
 536           and EXPSTATE (output) ports
 537
 538 config GPIO_ZEVIO
 539         bool "LSI ZEVIO SoC memory mapped GPIOs"
 540         depends on ARM && OF_GPIO
 541         help
 542           Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
 543
 544 config GPIO_ZYNQ
 545         tristate "Xilinx Zynq GPIO support"
 546         depends on ARCH_ZYNQ || ARCH_ZYNQMP
 547         select GPIOLIB_IRQCHIP
 548         help
 549           Say yes here to support Xilinx Zynq GPIO controller.
 550
 551 config GPIO_ZX
 552         bool "ZTE ZX GPIO support"
 553         depends on ARCH_ZX || COMPILE_TEST
 554         select GPIOLIB_IRQCHIP
 555         help
 556           Say yes here to support the GPIO device on ZTE ZX SoCs.
 557
 558 config GPIO_LOONGSON1
 559         tristate "Loongson1 GPIO support"
 560         depends on MACH_LOONGSON32
 561         select GPIO_GENERIC
 562         help
 563           Say Y or M here to support GPIO on Loongson1 SoCs.
 564
 565 endmenu
 566
 567 menu "Port-mapped I/O GPIO drivers"
 568         depends on X86 # Unconditional I/O space access
 569
 570 config GPIO_104_DIO_48E
 571         tristate "ACCES 104-DIO-48E GPIO support"
 572         depends on PC104 && ISA_BUS_API
 573         select GPIOLIB_IRQCHIP
 574         help
 575           Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
 576           104-DIO-24E). The base port addresses for the devices may be
 577           configured via the base module parameter. The interrupt line numbers
 578           for the devices may be configured via the irq module parameter.
 579
 580 config GPIO_104_IDIO_16
 581         tristate "ACCES 104-IDIO-16 GPIO support"
 582         depends on PC104 && ISA_BUS_API
 583         select GPIOLIB_IRQCHIP
 584         help
 585           Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
 586           104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
 587           base port addresses for the devices may be configured via the base
 588           module parameter. The interrupt line numbers for the devices may be
 589           configured via the irq module parameter.
 590
 591 config GPIO_104_IDI_48
 592         tristate "ACCES 104-IDI-48 GPIO support"
 593         depends on PC104 && ISA_BUS_API
 594         select GPIOLIB_IRQCHIP
 595         help
 596           Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
 597           104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
 598           the devices may be configured via the base module parameter. The
 599           interrupt line numbers for the devices may be configured via the irq
 600           module parameter.
 601
 602 config GPIO_F7188X
 603         tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support"
 604         help
 605           This option enables support for GPIOs found on Fintek Super-I/O
 606           chips F71869, F71869A, F71882FG, F71889F and F81866.
 607
 608           To compile this driver as a module, choose M here: the module will
 609           be called f7188x-gpio.
 610
 611 config GPIO_GPIO_MM
 612         tristate "Diamond Systems GPIO-MM GPIO support"
 613         depends on PC104 && ISA_BUS_API
 614         help
 615           Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
 616
 617           The Diamond Systems GPIO-MM device features 48 lines of digital I/O
 618           via the emulation of dual 82C55A PPI chips. This driver provides GPIO
 619           support for these 48 channels of digital I/O.
 620
 621           The base port addresses for the devices may be configured via the base
 622           array module parameter.
 623
 624 config GPIO_IT87
 625         tristate "IT87xx GPIO support"
 626         help
 627           Say yes here to support GPIO functionality of IT87xx Super I/O chips.
 628
 629           This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
 630           supports the IT8761E, IT8620E and IT8628E Super I/O chip as well.
 631
 632           To compile this driver as a module, choose M here: the module will
 633           be called gpio_it87
 634
 635 config GPIO_SCH
 636         tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
 637         depends on (X86 || COMPILE_TEST) && PCI
 638         select MFD_CORE
 639         select LPC_SCH
 640         help
 641           Say yes here to support GPIO interface on Intel Poulsbo SCH,
 642           Intel Tunnel Creek processor, Intel Centerton processor or
 643           Intel Quark X1000 SoC.
 644
 645           The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
 646           powered by the core power rail and are turned off during sleep
 647           modes (S3 and higher). The remaining four GPIOs are powered by
 648           the Intel SCH suspend power supply. These GPIOs remain
 649           active during S3. The suspend powered GPIOs can be used to wake the
 650           system from the Suspend-to-RAM state.
 651
 652           The Intel Tunnel Creek processor has 5 GPIOs powered by the
 653           core power rail and 9 from suspend power supply.
 654
 655           The Intel Centerton processor has a total of 30 GPIO pins.
 656           Twenty-one are powered by the core power rail and 9 from the
 657           suspend power supply.
 658
 659           The Intel Quark X1000 SoC has 2 GPIOs powered by the core
 660           power well and 6 from the suspend power well.
 661
 662 config GPIO_SCH311X
 663         tristate "SMSC SCH311x SuperI/O GPIO"
 664         help
 665           Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
 666           SCH3116 "Super I/O" chipsets.
 667
 668           To compile this driver as a module, choose M here: the module will
 669           be called gpio-sch311x.
 670
 671 config GPIO_TS5500
 672         tristate "TS-5500 DIO blocks and compatibles"
 673         depends on TS5500 || COMPILE_TEST
 674         help
 675           This driver supports Digital I/O exposed by pin blocks found on some
 676           Technologic Systems platforms. It includes, but is not limited to, 3
 677           blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
 678           LCD port.
 679
 680 config GPIO_WS16C48
 681         tristate "WinSystems WS16C48 GPIO support"
 682         depends on ISA_BUS_API
 683         select GPIOLIB_IRQCHIP
 684         help
 685           Enables GPIO support for the WinSystems WS16C48. The base port
 686           addresses for the devices may be configured via the base module
 687           parameter. The interrupt line numbers for the devices may be
 688           configured via the irq module parameter.
 689
 690 endmenu
 691
 692 menu "I2C GPIO expanders"
 693         depends on I2C
 694
 695 config GPIO_ADP5588
 696         tristate "ADP5588 I2C GPIO expander"
 697         help
 698           This option enables support for 18 GPIOs found
 699           on Analog Devices ADP5588 GPIO Expanders.
 700
 701 config GPIO_ADP5588_IRQ
 702         bool "Interrupt controller support for ADP5588"
 703         depends on GPIO_ADP5588=y
 704         help
 705           Say yes here to enable the adp5588 to be used as an interrupt
 706           controller. It requires the driver to be built in the kernel.
 707
 708 config GPIO_ADNP
 709         tristate "Avionic Design N-bit GPIO expander"
 710         depends on OF_GPIO
 711         select GPIOLIB_IRQCHIP
 712         help
 713           This option enables support for N GPIOs found on Avionic Design
 714           I2C GPIO expanders. The register space will be extended by powers
 715           of two, so the controller will need to accommodate for that. For
 716           example: if a controller provides 48 pins, 6 registers will be
 717           enough to represent all pins, but the driver will assume a
 718           register layout for 64 pins (8 registers).
 719
 720 config GPIO_MAX7300
 721         tristate "Maxim MAX7300 GPIO expander"
 722         select GPIO_MAX730X
 723         help
 724           GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
 725
 726 config GPIO_MAX732X
 727         tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
 728         help
 729           Say yes here to support the MAX7319, MAX7320-7327 series of I2C
 730           Port Expanders. Each IO port on these chips has a fixed role of
 731           Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
 732           Input and Output (designed by 'P'). The combinations are listed
 733           below:
 734
 735           8 bits:       max7319 (8I), max7320 (8O), max7321 (8P),
 736                         max7322 (4I4O), max7323 (4P4O)
 737
 738           16 bits:      max7324 (8I8O), max7325 (8P8O),
 739                         max7326 (4I12O), max7327 (4P12O)
 740
 741           Board setup code must specify the model to use, and the start
 742           number for these GPIOs.
 743
 744 config GPIO_MAX732X_IRQ
 745         bool "Interrupt controller support for MAX732x"
 746         depends on GPIO_MAX732X=y
 747         select GPIOLIB_IRQCHIP
 748         help
 749           Say yes here to enable the max732x to be used as an interrupt
 750           controller. It requires the driver to be built in the kernel.
 751
 752 config GPIO_MC9S08DZ60
 753         bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
 754         depends on I2C=y && MACH_MX35_3DS
 755         help
 756           Select this to enable the MC9S08DZ60 GPIO driver
 757
 758 config GPIO_PCA953X
 759         tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
 760         help
 761           Say yes here to provide access to several register-oriented
 762           SMBus I/O expanders, made mostly by NXP or TI.  Compatible
 763           models include:
 764
 765           4 bits:       pca9536, pca9537
 766
 767           8 bits:       max7310, max7315, pca6107, pca9534, pca9538, pca9554,
 768                         pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
 769
 770           16 bits:      max7312, max7313, pca9535, pca9539, pca9555, pca9575,
 771                         tca6416
 772
 773           24 bits:      tca6424
 774
 775           40 bits:      pca9505, pca9698
 776
 777 config GPIO_PCA953X_IRQ
 778         bool "Interrupt controller support for PCA953x"
 779         depends on GPIO_PCA953X=y
 780         select GPIOLIB_IRQCHIP
 781         help
 782           Say yes here to enable the pca953x to be used as an interrupt
 783           controller. It requires the driver to be built in the kernel.
 784
 785 config GPIO_PCF857X
 786         tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
 787         select GPIOLIB_IRQCHIP
 788         select IRQ_DOMAIN
 789         help
 790           Say yes here to provide access to most "quasi-bidirectional" I2C
 791           GPIO expanders used for additional digital outputs or inputs.
 792           Most of these parts are from NXP, though TI is a second source for
 793           some of them.  Compatible models include:
 794
 795           8 bits:   pcf8574, pcf8574a, pca8574, pca8574a,
 796                     pca9670, pca9672, pca9674, pca9674a,
 797                     max7328, max7329
 798
 799           16 bits:  pcf8575, pcf8575c, pca8575,
 800                     pca9671, pca9673, pca9675
 801
 802           Your board setup code will need to declare the expanders in
 803           use, and assign numbers to the GPIOs they expose.  Those GPIOs
 804           can then be used from drivers and other kernel code, just like
 805           other GPIOs, but only accessible from task contexts.
 806
 807           This driver provides an in-kernel interface to those GPIOs using
 808           platform-neutral GPIO calls.
 809
 810 config GPIO_SX150X
 811         bool "Semtech SX150x I2C GPIO expander (deprecated)"
 812         depends on PINCTRL && I2C=y
 813         select PINCTRL_SX150X
 814         default n
 815         help
 816           Say yes here to provide support for Semtech SX150x-series I2C
 817           GPIO expanders. The GPIO driver was replaced by a Pinctrl version.
 818
 819 config GPIO_TPIC2810
 820         tristate "TPIC2810 8-Bit I2C GPO expander"
 821         help
 822           Say yes here to enable the GPO driver for the TI TPIC2810 chip.
 823
 824           To compile this driver as a module, choose M here: the module will
 825           be called gpio-tpic2810.
 826
 827 config GPIO_TS4900
 828         tristate "Technologic Systems FPGA I2C GPIO"
 829         depends on SOC_IMX6 || COMPILE_TEST
 830         select REGMAP_I2C
 831         help
 832           Say yes here to enabled the GPIO driver for Technologic's FPGA core.
 833           Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
 834
 835 endmenu
 836
 837 menu "MFD GPIO expanders"
 838
 839 config GPIO_ADP5520
 840         tristate "GPIO Support for ADP5520 PMIC"
 841         depends on PMIC_ADP5520
 842         help
 843           This option enables support for on-chip GPIO found
 844           on Analog Devices ADP5520 PMICs.
 845
 846 config GPIO_ALTERA_A10SR
 847         tristate "Altera Arria10 System Resource GPIO"
 848         depends on MFD_ALTERA_A10SR
 849         help
 850           Driver for Arria10 Development Kit GPIO expansion which
 851           includes reads of pushbuttons and DIP switches as well
 852           as writes to LEDs.
 853
 854 config GPIO_ARIZONA
 855         tristate "Wolfson Microelectronics Arizona class devices"
 856         depends on MFD_ARIZONA
 857         help
 858           Support for GPIOs on Wolfson Arizona class devices.
 859
 860 config GPIO_BD9571MWV
 861         tristate "ROHM BD9571 GPIO support"
 862         depends on MFD_BD9571MWV
 863         help
 864           Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
 865           available on the ROHM PMIC in total, both of which can also
 866           generate interrupts.
 867
 868           This driver can also be built as a module. If so, the module
 869           will be called gpio-bd9571mwv.
 870
 871 config GPIO_CRYSTAL_COVE
 872         tristate "GPIO support for Crystal Cove PMIC"
 873         depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
 874         select GPIOLIB_IRQCHIP
 875         help
 876           Support for GPIO pins on Crystal Cove PMIC.
 877
 878           Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
 879           inside.
 880
 881           This driver can also be built as a module. If so, the module will be
 882           called gpio-crystalcove.
 883
 884 config GPIO_CS5535
 885         tristate "AMD CS5535/CS5536 GPIO support"
 886         depends on X86 || MIPS || COMPILE_TEST
 887         depends on MFD_CS5535
 888         help
 889           The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
 890           can be used for quite a number of things.  The CS5535/6 is found on
 891           AMD Geode and Lemote Yeeloong devices.
 892
 893           If unsure, say N.
 894
 895 config GPIO_DA9052
 896         tristate "Dialog DA9052 GPIO"
 897         depends on PMIC_DA9052
 898         help
 899           Say yes here to enable the GPIO driver for the DA9052 chip.
 900
 901 config GPIO_DA9055
 902         tristate "Dialog Semiconductor DA9055 GPIO"
 903         depends on MFD_DA9055
 904         help
 905           Say yes here to enable the GPIO driver for the DA9055 chip.
 906
 907           The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
 908           be controller by this driver.
 909
 910           If driver is built as a module it will be called gpio-da9055.
 911
 912 config GPIO_DLN2
 913         tristate "Diolan DLN2 GPIO support"
 914         depends on MFD_DLN2
 915         select GPIOLIB_IRQCHIP
 916
 917         help
 918           Select this option to enable GPIO driver for the Diolan DLN2
 919           board.
 920
 921           This driver can also be built as a module. If so, the module
 922           will be called gpio-dln2.
 923
 924 config HTC_EGPIO
 925         bool "HTC EGPIO support"
 926         depends on GPIOLIB && ARM
 927         help
 928             This driver supports the CPLD egpio chip present on
 929             several HTC phones.  It provides basic support for input
 930             pins, output pins, and irqs.
 931
 932 config GPIO_JANZ_TTL
 933         tristate "Janz VMOD-TTL Digital IO Module"
 934         depends on MFD_JANZ_CMODIO
 935         help
 936           This enables support for the Janz VMOD-TTL Digital IO module.
 937           This driver provides support for driving the pins in output
 938           mode only. Input mode is not supported.
 939
 940 config GPIO_KEMPLD
 941         tristate "Kontron ETX / COMexpress GPIO"
 942         depends on MFD_KEMPLD
 943         help
 944           This enables support for the PLD GPIO interface on some Kontron ETX
 945           and COMexpress (ETXexpress) modules.
 946
 947           This driver can also be built as a module. If so, the module will be
 948           called gpio-kempld.
 949
 950 config GPIO_LP3943
 951         tristate "TI/National Semiconductor LP3943 GPIO expander"
 952         depends on MFD_LP3943
 953         help
 954           GPIO driver for LP3943 MFD.
 955           LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
 956           Open drain outputs are required for this usage.
 957
 958 config GPIO_LP873X
 959         tristate "TI LP873X GPO"
 960         depends on MFD_TI_LP873X
 961         help
 962           This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
 963           on LP873X PMICs.
 964
 965           This driver can also be built as a module. If so, the module will be
 966           called gpio-lp873x.
 967
 968 config GPIO_LP87565
 969         tristate "TI LP87565 GPIO"
 970         depends on MFD_TI_LP87565
 971         help
 972           This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
 973           on LP87565 PMICs.
 974
 975           This driver can also be built as a module. If so, the module will be
 976           called gpio-lp87565.
 977
 978 config GPIO_MAX77620
 979         tristate "GPIO support for PMIC MAX77620 and MAX20024"
 980         depends on MFD_MAX77620
 981         help
 982           GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
 983           MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
 984           driver also provides interrupt support for each of the gpios.
 985           Say yes here to enable the max77620 to be used as gpio controller.
 986
 987 config GPIO_MSIC
 988         bool "Intel MSIC mixed signal gpio support"
 989         depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC
 990         help
 991           Enable support for GPIO on intel MSIC controllers found in
 992           intel MID devices
 993
 994 config GPIO_PALMAS
 995         bool "TI PALMAS series PMICs GPIO"
 996         depends on MFD_PALMAS
 997         help
 998           Select this option to enable GPIO driver for the TI PALMAS
 999           series chip family.
1000
1001 config GPIO_RC5T583
1002         bool "RICOH RC5T583 GPIO"
1003         depends on MFD_RC5T583
1004         help
1005           Select this option to enable GPIO driver for the Ricoh RC5T583
1006           chip family.
1007           This driver provides the support for driving/reading the gpio pins
1008           of RC5T583 device through standard gpio library.
1009
1010 config GPIO_STMPE
1011         bool "STMPE GPIOs"
1012         depends on MFD_STMPE
1013         depends on OF_GPIO
1014         select GPIOLIB_IRQCHIP
1015         help
1016           This enables support for the GPIOs found on the STMPE I/O
1017           Expanders.
1018
1019 config GPIO_TC3589X
1020         bool "TC3589X GPIOs"
1021         depends on MFD_TC3589X
1022         depends on OF_GPIO
1023         select GPIOLIB_IRQCHIP
1024         help
1025           This enables support for the GPIOs found on the TC3589X
1026           I/O Expander.
1027
1028 config GPIO_TIMBERDALE
1029         bool "Support for timberdale GPIO IP"
1030         depends on MFD_TIMBERDALE
1031         ---help---
1032         Add support for the GPIO IP in the timberdale FPGA.
1033
1034 config GPIO_TPS65086
1035         tristate "TI TPS65086 GPO"
1036         depends on MFD_TPS65086
1037         help
1038           This driver supports the GPO on TI TPS65086x PMICs.
1039
1040 config GPIO_TPS65218
1041         tristate "TPS65218 GPIO"
1042         depends on MFD_TPS65218
1043         help
1044           Select this option to enable GPIO driver for the TPS65218
1045           chip family.
1046
1047 config GPIO_TPS6586X
1048         bool "TPS6586X GPIO"
1049         depends on MFD_TPS6586X
1050         help
1051           Select this option to enable GPIO driver for the TPS6586X
1052           chip family.
1053
1054 config GPIO_TPS65910
1055         bool "TPS65910 GPIO"
1056         depends on MFD_TPS65910
1057         help
1058           Select this option to enable GPIO driver for the TPS65910
1059           chip family.
1060
1061 config GPIO_TPS65912
1062         tristate "TI TPS65912 GPIO"
1063         depends on MFD_TPS65912
1064         help
1065           This driver supports TPS65912 gpio chip
1066
1067 config GPIO_TWL4030
1068         tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1069         depends on TWL4030_CORE
1070         help
1071           Say yes here to access the GPIO signals of various multi-function
1072           power management chips from Texas Instruments.
1073
1074 config GPIO_TWL6040
1075         tristate "TWL6040 GPO"
1076         depends on TWL6040_CORE
1077         help
1078           Say yes here to access the GPO signals of twl6040
1079           audio chip from Texas Instruments.
1080
1081 config GPIO_UCB1400
1082         tristate "Philips UCB1400 GPIO"
1083         depends on UCB1400_CORE
1084         help
1085           This enables support for the Philips UCB1400 GPIO pins.
1086           The UCB1400 is an AC97 audio codec.
1087
1088 config GPIO_WHISKEY_COVE
1089         tristate "GPIO support for Whiskey Cove PMIC"
1090         depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1091         select GPIOLIB_IRQCHIP
1092         help
1093           Support for GPIO pins on Whiskey Cove PMIC.
1094
1095           Say Yes if you have a Intel SoC based tablet with Whiskey Cove PMIC
1096           inside.
1097
1098           This driver can also be built as a module. If so, the module will be
1099           called gpio-wcove.
1100
1101 config GPIO_WM831X
1102         tristate "WM831x GPIOs"
1103         depends on MFD_WM831X
1104         help
1105           Say yes here to access the GPIO signals of WM831x power management
1106           chips from Wolfson Microelectronics.
1107
1108 config GPIO_WM8350
1109         tristate "WM8350 GPIOs"
1110         depends on MFD_WM8350
1111         help
1112           Say yes here to access the GPIO signals of WM8350 power management
1113           chips from Wolfson Microelectronics.
1114
1115 config GPIO_WM8994
1116         tristate "WM8994 GPIOs"
1117         depends on MFD_WM8994
1118         help
1119           Say yes here to access the GPIO signals of WM8994 audio hub
1120           CODECs from Wolfson Microelectronics.
1121
1122 endmenu
1123
1124 menu "PCI GPIO expanders"
1125         depends on PCI
1126
1127 config GPIO_AMD8111
1128         tristate "AMD 8111 GPIO driver"
1129         depends on X86 || COMPILE_TEST
1130         help
1131           The AMD 8111 south bridge contains 32 GPIO pins which can be used.
1132
1133           Note, that usually system firmware/ACPI handles GPIO pins on their
1134           own and users might easily break their systems with uncarefull usage
1135           of this driver!
1136
1137           If unsure, say N
1138
1139 config GPIO_BT8XX
1140         tristate "BT8XX GPIO abuser"
1141         depends on VIDEO_BT848=n
1142         help
1143           The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1144           as a cheap PCI GPIO card.
1145
1146           This chip can be found on Miro, Hauppauge and STB TV-cards.
1147
1148           The card needs to be physically altered for using it as a
1149           GPIO card. For more information on how to build a GPIO card
1150           from a BT8xx TV card, see the documentation file at
1151           Documentation/bt8xxgpio.txt
1152
1153           If unsure, say N.
1154
1155 config GPIO_INTEL_MID
1156         bool "Intel MID GPIO support"
1157         depends on X86_INTEL_MID
1158         select GPIOLIB_IRQCHIP
1159         help
1160           Say Y here to support Intel MID GPIO.
1161
1162 config GPIO_MERRIFIELD
1163         tristate "Intel Merrifield GPIO support"
1164         depends on X86_INTEL_MID
1165         select GPIOLIB_IRQCHIP
1166         help
1167           Say Y here to support Intel Merrifield GPIO.
1168
1169 config GPIO_ML_IOH
1170         tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1171         depends on X86 || COMPILE_TEST
1172         select GENERIC_IRQ_CHIP
1173         help
1174           ML7213 is companion chip for Intel Atom E6xx series.
1175           This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
1176           Hub) which is for IVI(In-Vehicle Infotainment) use.
1177           This driver can access the IOH's GPIO device.
1178
1179 config GPIO_PCH
1180         tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
1181         depends on X86_32 || MIPS || COMPILE_TEST
1182         select GENERIC_IRQ_CHIP
1183         help
1184           This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
1185           which is an IOH(Input/Output Hub) for x86 embedded processor.
1186           This driver can access PCH GPIO device.
1187
1188           This driver also can be used for LAPIS Semiconductor IOH(Input/
1189           Output Hub), ML7223 and ML7831.
1190           ML7223 IOH is for MP(Media Phone) use.
1191           ML7831 IOH is for general purpose use.
1192           ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1193           ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1194
1195 config GPIO_PCI_IDIO_16
1196         tristate "ACCES PCI-IDIO-16 GPIO support"
1197         select GPIOLIB_IRQCHIP
1198         help
1199           Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1200           generated when any of the inputs change state (low to high or high to
1201           low). Input filter control is not supported by this driver, and the
1202           input filters are deactivated by this driver.
1203
1204 config GPIO_RDC321X
1205         tristate "RDC R-321x GPIO support"
1206         select MFD_CORE
1207         select MFD_RDC321X
1208         help
1209           Support for the RDC R321x SoC GPIOs over southbridge
1210           PCI configuration space.
1211
1212 config GPIO_SODAVILLE
1213         bool "Intel Sodaville GPIO support"
1214         depends on X86 && OF
1215         select GPIO_GENERIC
1216         select GENERIC_IRQ_CHIP
1217         help
1218           Say Y here to support Intel Sodaville GPIO.
1219
1220 endmenu
1221
1222 menu "SPI GPIO expanders"
1223         depends on SPI_MASTER
1224
1225 config GPIO_74X164
1226         tristate "74x164 serial-in/parallel-out 8-bits shift register"
1227         depends on OF_GPIO
1228         help
1229           Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1230           shift registers. This driver can be used to provide access
1231           to more gpio outputs.
1232
1233 config GPIO_MAX7301
1234         tristate "Maxim MAX7301 GPIO expander"
1235         select GPIO_MAX730X
1236         help
1237           GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1238
1239 config GPIO_MC33880
1240         tristate "Freescale MC33880 high-side/low-side switch"
1241         help
1242           SPI driver for Freescale MC33880 high-side/low-side switch.
1243           This provides GPIO interface supporting inputs and outputs.
1244
1245 config GPIO_PISOSR
1246         tristate "Generic parallel-in/serial-out shift register"
1247         help
1248           GPIO driver for SPI compatible parallel-in/serial-out shift
1249           registers. These are input only devices.
1250
1251 config GPIO_XRA1403
1252         tristate "EXAR XRA1403 16-bit GPIO expander"
1253         select REGMAP_SPI
1254         help
1255           GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1256
1257 endmenu
1258
1259 menu "USB GPIO expanders"
1260         depends on USB
1261
1262 config GPIO_VIPERBOARD
1263         tristate "Viperboard GPIO a & b support"
1264         depends on MFD_VIPERBOARD
1265         help
1266           Say yes here to access the GPIO signals of Nano River
1267           Technologies Viperboard. There are two GPIO chips on the
1268           board: gpioa and gpiob.
1269           See viperboard API specification and Nano
1270           River Tech's viperboard.h for detailed meaning
1271           of the module parameters.
1272
1273 endmenu
1274
1275 endif