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         select IRQ_DOMAIN_HIERARCHY
 508         help
 509           This driver supports the GPIO block within the APM X-Gene
 510           Standby Domain. Say yes here to enable the GPIO functionality.
 511
 512 config GPIO_XILINX
 513         tristate "Xilinx GPIO support"
 514         depends on OF_GPIO
 515         help
 516           Say yes here to support the Xilinx FPGA GPIO device
 517
 518 config GPIO_XLP
 519         tristate "Netlogic XLP GPIO support"
 520         depends on OF_GPIO && (CPU_XLP || ARCH_THUNDER2 || COMPILE_TEST)
 521         select GPIOLIB_IRQCHIP
 522         help
 523           This driver provides support for GPIO interface on Netlogic XLP MIPS64
 524           SoCs. Currently supported XLP variants are XLP8XX, XLP3XX, XLP2XX,
 525           XLP9XX and XLP5XX. The same GPIO controller block is also present in
 526           Cavium's ThunderX2 CN99XX SoCs.
 527
 528           If unsure, say N.
 529
 530 config GPIO_XTENSA
 531         bool "Xtensa GPIO32 support"
 532         depends on XTENSA
 533         depends on HAVE_XTENSA_GPIO32
 534         depends on !SMP
 535         help
 536           Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
 537           and EXPSTATE (output) ports
 538
 539 config GPIO_ZEVIO
 540         bool "LSI ZEVIO SoC memory mapped GPIOs"
 541         depends on ARM && OF_GPIO
 542         help
 543           Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
 544
 545 config GPIO_ZYNQ
 546         tristate "Xilinx Zynq GPIO support"
 547         depends on ARCH_ZYNQ || ARCH_ZYNQMP
 548         select GPIOLIB_IRQCHIP
 549         help
 550           Say yes here to support Xilinx Zynq GPIO controller.
 551
 552 config GPIO_ZX
 553         bool "ZTE ZX GPIO support"
 554         depends on ARCH_ZX || COMPILE_TEST
 555         select GPIOLIB_IRQCHIP
 556         help
 557           Say yes here to support the GPIO device on ZTE ZX SoCs.
 558
 559 config GPIO_LOONGSON1
 560         tristate "Loongson1 GPIO support"
 561         depends on MACH_LOONGSON32
 562         select GPIO_GENERIC
 563         help
 564           Say Y or M here to support GPIO on Loongson1 SoCs.
 565
 566 endmenu
 567
 568 menu "Port-mapped I/O GPIO drivers"
 569         depends on X86 # Unconditional I/O space access
 570
 571 config GPIO_104_DIO_48E
 572         tristate "ACCES 104-DIO-48E GPIO support"
 573         depends on PC104 && ISA_BUS_API
 574         select GPIOLIB_IRQCHIP
 575         help
 576           Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
 577           104-DIO-24E). The base port addresses for the devices may be
 578           configured via the base module parameter. The interrupt line numbers
 579           for the devices may be configured via the irq module parameter.
 580
 581 config GPIO_104_IDIO_16
 582         tristate "ACCES 104-IDIO-16 GPIO support"
 583         depends on PC104 && ISA_BUS_API
 584         select GPIOLIB_IRQCHIP
 585         help
 586           Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
 587           104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
 588           base port addresses for the devices may be configured via the base
 589           module parameter. The interrupt line numbers for the devices may be
 590           configured via the irq module parameter.
 591
 592 config GPIO_104_IDI_48
 593         tristate "ACCES 104-IDI-48 GPIO support"
 594         depends on PC104 && ISA_BUS_API
 595         select GPIOLIB_IRQCHIP
 596         help
 597           Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
 598           104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
 599           the devices may be configured via the base module parameter. The
 600           interrupt line numbers for the devices may be configured via the irq
 601           module parameter.
 602
 603 config GPIO_F7188X
 604         tristate "F71869, F71869A, F71882FG, F71889F and F81866 GPIO support"
 605         help
 606           This option enables support for GPIOs found on Fintek Super-I/O
 607           chips F71869, F71869A, F71882FG, F71889F and F81866.
 608
 609           To compile this driver as a module, choose M here: the module will
 610           be called f7188x-gpio.
 611
 612 config GPIO_GPIO_MM
 613         tristate "Diamond Systems GPIO-MM GPIO support"
 614         depends on PC104 && ISA_BUS_API
 615         help
 616           Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
 617
 618           The Diamond Systems GPIO-MM device features 48 lines of digital I/O
 619           via the emulation of dual 82C55A PPI chips. This driver provides GPIO
 620           support for these 48 channels of digital I/O.
 621
 622           The base port addresses for the devices may be configured via the base
 623           array module parameter.
 624
 625 config GPIO_IT87
 626         tristate "IT87xx GPIO support"
 627         help
 628           Say yes here to support GPIO functionality of IT87xx Super I/O chips.
 629
 630           This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
 631           supports the IT8761E, IT8620E and IT8628E Super I/O chip as well.
 632
 633           To compile this driver as a module, choose M here: the module will
 634           be called gpio_it87
 635
 636 config GPIO_SCH
 637         tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
 638         depends on (X86 || COMPILE_TEST) && PCI
 639         select MFD_CORE
 640         select LPC_SCH
 641         help
 642           Say yes here to support GPIO interface on Intel Poulsbo SCH,
 643           Intel Tunnel Creek processor, Intel Centerton processor or
 644           Intel Quark X1000 SoC.
 645
 646           The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
 647           powered by the core power rail and are turned off during sleep
 648           modes (S3 and higher). The remaining four GPIOs are powered by
 649           the Intel SCH suspend power supply. These GPIOs remain
 650           active during S3. The suspend powered GPIOs can be used to wake the
 651           system from the Suspend-to-RAM state.
 652
 653           The Intel Tunnel Creek processor has 5 GPIOs powered by the
 654           core power rail and 9 from suspend power supply.
 655
 656           The Intel Centerton processor has a total of 30 GPIO pins.
 657           Twenty-one are powered by the core power rail and 9 from the
 658           suspend power supply.
 659
 660           The Intel Quark X1000 SoC has 2 GPIOs powered by the core
 661           power well and 6 from the suspend power well.
 662
 663 config GPIO_SCH311X
 664         tristate "SMSC SCH311x SuperI/O GPIO"
 665         help
 666           Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
 667           SCH3116 "Super I/O" chipsets.
 668
 669           To compile this driver as a module, choose M here: the module will
 670           be called gpio-sch311x.
 671
 672 config GPIO_TS5500
 673         tristate "TS-5500 DIO blocks and compatibles"
 674         depends on TS5500 || COMPILE_TEST
 675         help
 676           This driver supports Digital I/O exposed by pin blocks found on some
 677           Technologic Systems platforms. It includes, but is not limited to, 3
 678           blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
 679           LCD port.
 680
 681 config GPIO_WS16C48
 682         tristate "WinSystems WS16C48 GPIO support"
 683         depends on ISA_BUS_API
 684         select GPIOLIB_IRQCHIP
 685         help
 686           Enables GPIO support for the WinSystems WS16C48. The base port
 687           addresses for the devices may be configured via the base module
 688           parameter. The interrupt line numbers for the devices may be
 689           configured via the irq module parameter.
 690
 691 endmenu
 692
 693 menu "I2C GPIO expanders"
 694         depends on I2C
 695
 696 config GPIO_ADP5588
 697         tristate "ADP5588 I2C GPIO expander"
 698         help
 699           This option enables support for 18 GPIOs found
 700           on Analog Devices ADP5588 GPIO Expanders.
 701
 702 config GPIO_ADP5588_IRQ
 703         bool "Interrupt controller support for ADP5588"
 704         depends on GPIO_ADP5588=y
 705         help
 706           Say yes here to enable the adp5588 to be used as an interrupt
 707           controller. It requires the driver to be built in the kernel.
 708
 709 config GPIO_ADNP
 710         tristate "Avionic Design N-bit GPIO expander"
 711         depends on OF_GPIO
 712         select GPIOLIB_IRQCHIP
 713         help
 714           This option enables support for N GPIOs found on Avionic Design
 715           I2C GPIO expanders. The register space will be extended by powers
 716           of two, so the controller will need to accommodate for that. For
 717           example: if a controller provides 48 pins, 6 registers will be
 718           enough to represent all pins, but the driver will assume a
 719           register layout for 64 pins (8 registers).
 720
 721 config GPIO_MAX7300
 722         tristate "Maxim MAX7300 GPIO expander"
 723         select GPIO_MAX730X
 724         help
 725           GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
 726
 727 config GPIO_MAX732X
 728         tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
 729         help
 730           Say yes here to support the MAX7319, MAX7320-7327 series of I2C
 731           Port Expanders. Each IO port on these chips has a fixed role of
 732           Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
 733           Input and Output (designed by 'P'). The combinations are listed
 734           below:
 735
 736           8 bits:       max7319 (8I), max7320 (8O), max7321 (8P),
 737                         max7322 (4I4O), max7323 (4P4O)
 738
 739           16 bits:      max7324 (8I8O), max7325 (8P8O),
 740                         max7326 (4I12O), max7327 (4P12O)
 741
 742           Board setup code must specify the model to use, and the start
 743           number for these GPIOs.
 744
 745 config GPIO_MAX732X_IRQ
 746         bool "Interrupt controller support for MAX732x"
 747         depends on GPIO_MAX732X=y
 748         select GPIOLIB_IRQCHIP
 749         help
 750           Say yes here to enable the max732x to be used as an interrupt
 751           controller. It requires the driver to be built in the kernel.
 752
 753 config GPIO_MC9S08DZ60
 754         bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
 755         depends on I2C=y && MACH_MX35_3DS
 756         help
 757           Select this to enable the MC9S08DZ60 GPIO driver
 758
 759 config GPIO_PCA953X
 760         tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
 761         help
 762           Say yes here to provide access to several register-oriented
 763           SMBus I/O expanders, made mostly by NXP or TI.  Compatible
 764           models include:
 765
 766           4 bits:       pca9536, pca9537
 767
 768           8 bits:       max7310, max7315, pca6107, pca9534, pca9538, pca9554,
 769                         pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
 770
 771           16 bits:      max7312, max7313, pca9535, pca9539, pca9555, pca9575,
 772                         tca6416
 773
 774           24 bits:      tca6424
 775
 776           40 bits:      pca9505, pca9698
 777
 778 config GPIO_PCA953X_IRQ
 779         bool "Interrupt controller support for PCA953x"
 780         depends on GPIO_PCA953X=y
 781         select GPIOLIB_IRQCHIP
 782         help
 783           Say yes here to enable the pca953x to be used as an interrupt
 784           controller. It requires the driver to be built in the kernel.
 785
 786 config GPIO_PCF857X
 787         tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
 788         select GPIOLIB_IRQCHIP
 789         select IRQ_DOMAIN
 790         help
 791           Say yes here to provide access to most "quasi-bidirectional" I2C
 792           GPIO expanders used for additional digital outputs or inputs.
 793           Most of these parts are from NXP, though TI is a second source for
 794           some of them.  Compatible models include:
 795
 796           8 bits:   pcf8574, pcf8574a, pca8574, pca8574a,
 797                     pca9670, pca9672, pca9674, pca9674a,
 798                     max7328, max7329
 799
 800           16 bits:  pcf8575, pcf8575c, pca8575,
 801                     pca9671, pca9673, pca9675
 802
 803           Your board setup code will need to declare the expanders in
 804           use, and assign numbers to the GPIOs they expose.  Those GPIOs
 805           can then be used from drivers and other kernel code, just like
 806           other GPIOs, but only accessible from task contexts.
 807
 808           This driver provides an in-kernel interface to those GPIOs using
 809           platform-neutral GPIO calls.
 810
 811 config GPIO_SX150X
 812         bool "Semtech SX150x I2C GPIO expander (deprecated)"
 813         depends on PINCTRL && I2C=y
 814         select PINCTRL_SX150X
 815         default n
 816         help
 817           Say yes here to provide support for Semtech SX150x-series I2C
 818           GPIO expanders. The GPIO driver was replaced by a Pinctrl version.
 819
 820 config GPIO_TPIC2810
 821         tristate "TPIC2810 8-Bit I2C GPO expander"
 822         help
 823           Say yes here to enable the GPO driver for the TI TPIC2810 chip.
 824
 825           To compile this driver as a module, choose M here: the module will
 826           be called gpio-tpic2810.
 827
 828 config GPIO_TS4900
 829         tristate "Technologic Systems FPGA I2C GPIO"
 830         depends on SOC_IMX6 || COMPILE_TEST
 831         select REGMAP_I2C
 832         help
 833           Say yes here to enabled the GPIO driver for Technologic's FPGA core.
 834           Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
 835
 836 endmenu
 837
 838 menu "MFD GPIO expanders"
 839
 840 config GPIO_ADP5520
 841         tristate "GPIO Support for ADP5520 PMIC"
 842         depends on PMIC_ADP5520
 843         help
 844           This option enables support for on-chip GPIO found
 845           on Analog Devices ADP5520 PMICs.
 846
 847 config GPIO_ALTERA_A10SR
 848         tristate "Altera Arria10 System Resource GPIO"
 849         depends on MFD_ALTERA_A10SR
 850         help
 851           Driver for Arria10 Development Kit GPIO expansion which
 852           includes reads of pushbuttons and DIP switches as well
 853           as writes to LEDs.
 854
 855 config GPIO_ARIZONA
 856         tristate "Wolfson Microelectronics Arizona class devices"
 857         depends on MFD_ARIZONA
 858         help
 859           Support for GPIOs on Wolfson Arizona class devices.
 860
 861 config GPIO_BD9571MWV
 862         tristate "ROHM BD9571 GPIO support"
 863         depends on MFD_BD9571MWV
 864         help
 865           Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
 866           available on the ROHM PMIC in total, both of which can also
 867           generate interrupts.
 868
 869           This driver can also be built as a module. If so, the module
 870           will be called gpio-bd9571mwv.
 871
 872 config GPIO_CRYSTAL_COVE
 873         tristate "GPIO support for Crystal Cove PMIC"
 874         depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
 875         select GPIOLIB_IRQCHIP
 876         help
 877           Support for GPIO pins on Crystal Cove PMIC.
 878
 879           Say Yes if you have a Intel SoC based tablet with Crystal Cove PMIC
 880           inside.
 881
 882           This driver can also be built as a module. If so, the module will be
 883           called gpio-crystalcove.
 884
 885 config GPIO_CS5535
 886         tristate "AMD CS5535/CS5536 GPIO support"
 887         depends on X86 || MIPS || COMPILE_TEST
 888         depends on MFD_CS5535
 889         help
 890           The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
 891           can be used for quite a number of things.  The CS5535/6 is found on
 892           AMD Geode and Lemote Yeeloong devices.
 893
 894           If unsure, say N.
 895
 896 config GPIO_DA9052
 897         tristate "Dialog DA9052 GPIO"
 898         depends on PMIC_DA9052
 899         help
 900           Say yes here to enable the GPIO driver for the DA9052 chip.
 901
 902 config GPIO_DA9055
 903         tristate "Dialog Semiconductor DA9055 GPIO"
 904         depends on MFD_DA9055
 905         help
 906           Say yes here to enable the GPIO driver for the DA9055 chip.
 907
 908           The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
 909           be controller by this driver.
 910
 911           If driver is built as a module it will be called gpio-da9055.
 912
 913 config GPIO_DLN2
 914         tristate "Diolan DLN2 GPIO support"
 915         depends on MFD_DLN2
 916         select GPIOLIB_IRQCHIP
 917
 918         help
 919           Select this option to enable GPIO driver for the Diolan DLN2
 920           board.
 921
 922           This driver can also be built as a module. If so, the module
 923           will be called gpio-dln2.
 924
 925 config HTC_EGPIO
 926         bool "HTC EGPIO support"
 927         depends on GPIOLIB && ARM
 928         help
 929             This driver supports the CPLD egpio chip present on
 930             several HTC phones.  It provides basic support for input
 931             pins, output pins, and irqs.
 932
 933 config GPIO_JANZ_TTL
 934         tristate "Janz VMOD-TTL Digital IO Module"
 935         depends on MFD_JANZ_CMODIO
 936         help
 937           This enables support for the Janz VMOD-TTL Digital IO module.
 938           This driver provides support for driving the pins in output
 939           mode only. Input mode is not supported.
 940
 941 config GPIO_KEMPLD
 942         tristate "Kontron ETX / COMexpress GPIO"
 943         depends on MFD_KEMPLD
 944         help
 945           This enables support for the PLD GPIO interface on some Kontron ETX
 946           and COMexpress (ETXexpress) modules.
 947
 948           This driver can also be built as a module. If so, the module will be
 949           called gpio-kempld.
 950
 951 config GPIO_LP3943
 952         tristate "TI/National Semiconductor LP3943 GPIO expander"
 953         depends on MFD_LP3943
 954         help
 955           GPIO driver for LP3943 MFD.
 956           LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
 957           Open drain outputs are required for this usage.
 958
 959 config GPIO_LP873X
 960         tristate "TI LP873X GPO"
 961         depends on MFD_TI_LP873X
 962         help
 963           This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
 964           on LP873X PMICs.
 965
 966           This driver can also be built as a module. If so, the module will be
 967           called gpio-lp873x.
 968
 969 config GPIO_LP87565
 970         tristate "TI LP87565 GPIO"
 971         depends on MFD_TI_LP87565
 972         help
 973           This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
 974           on LP87565 PMICs.
 975
 976           This driver can also be built as a module. If so, the module will be
 977           called gpio-lp87565.
 978
 979 config GPIO_MAX77620
 980         tristate "GPIO support for PMIC MAX77620 and MAX20024"
 981         depends on MFD_MAX77620
 982         help
 983           GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
 984           MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
 985           driver also provides interrupt support for each of the gpios.
 986           Say yes here to enable the max77620 to be used as gpio controller.
 987
 988 config GPIO_MSIC
 989         bool "Intel MSIC mixed signal gpio support"
 990         depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC
 991         help
 992           Enable support for GPIO on intel MSIC controllers found in
 993           intel MID devices
 994
 995 config GPIO_PALMAS
 996         bool "TI PALMAS series PMICs GPIO"
 997         depends on MFD_PALMAS
 998         help
 999           Select this option to enable GPIO driver for the TI PALMAS
1000           series chip family.
1001
1002 config GPIO_RC5T583
1003         bool "RICOH RC5T583 GPIO"
1004         depends on MFD_RC5T583
1005         help
1006           Select this option to enable GPIO driver for the Ricoh RC5T583
1007           chip family.
1008           This driver provides the support for driving/reading the gpio pins
1009           of RC5T583 device through standard gpio library.
1010
1011 config GPIO_STMPE
1012         bool "STMPE GPIOs"
1013         depends on MFD_STMPE
1014         depends on OF_GPIO
1015         select GPIOLIB_IRQCHIP
1016         help
1017           This enables support for the GPIOs found on the STMPE I/O
1018           Expanders.
1019
1020 config GPIO_TC3589X
1021         bool "TC3589X GPIOs"
1022         depends on MFD_TC3589X
1023         depends on OF_GPIO
1024         select GPIOLIB_IRQCHIP
1025         help
1026           This enables support for the GPIOs found on the TC3589X
1027           I/O Expander.
1028
1029 config GPIO_TIMBERDALE
1030         bool "Support for timberdale GPIO IP"
1031         depends on MFD_TIMBERDALE
1032         ---help---
1033         Add support for the GPIO IP in the timberdale FPGA.
1034
1035 config GPIO_TPS65086
1036         tristate "TI TPS65086 GPO"
1037         depends on MFD_TPS65086
1038         help
1039           This driver supports the GPO on TI TPS65086x PMICs.
1040
1041 config GPIO_TPS65218
1042         tristate "TPS65218 GPIO"
1043         depends on MFD_TPS65218
1044         help
1045           Select this option to enable GPIO driver for the TPS65218
1046           chip family.
1047
1048 config GPIO_TPS6586X
1049         bool "TPS6586X GPIO"
1050         depends on MFD_TPS6586X
1051         help
1052           Select this option to enable GPIO driver for the TPS6586X
1053           chip family.
1054
1055 config GPIO_TPS65910
1056         bool "TPS65910 GPIO"
1057         depends on MFD_TPS65910
1058         help
1059           Select this option to enable GPIO driver for the TPS65910
1060           chip family.
1061
1062 config GPIO_TPS65912
1063         tristate "TI TPS65912 GPIO"
1064         depends on MFD_TPS65912
1065         help
1066           This driver supports TPS65912 gpio chip
1067
1068 config GPIO_TWL4030
1069         tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1070         depends on TWL4030_CORE
1071         help
1072           Say yes here to access the GPIO signals of various multi-function
1073           power management chips from Texas Instruments.
1074
1075 config GPIO_TWL6040
1076         tristate "TWL6040 GPO"
1077         depends on TWL6040_CORE
1078         help
1079           Say yes here to access the GPO signals of twl6040
1080           audio chip from Texas Instruments.
1081
1082 config GPIO_UCB1400
1083         tristate "Philips UCB1400 GPIO"
1084         depends on UCB1400_CORE
1085         help
1086           This enables support for the Philips UCB1400 GPIO pins.
1087           The UCB1400 is an AC97 audio codec.
1088
1089 config GPIO_WHISKEY_COVE
1090         tristate "GPIO support for Whiskey Cove PMIC"
1091         depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1092         select GPIOLIB_IRQCHIP
1093         help
1094           Support for GPIO pins on Whiskey Cove PMIC.
1095
1096           Say Yes if you have a Intel SoC based tablet with Whiskey Cove PMIC
1097           inside.
1098
1099           This driver can also be built as a module. If so, the module will be
1100           called gpio-wcove.
1101
1102 config GPIO_WM831X
1103         tristate "WM831x GPIOs"
1104         depends on MFD_WM831X
1105         help
1106           Say yes here to access the GPIO signals of WM831x power management
1107           chips from Wolfson Microelectronics.
1108
1109 config GPIO_WM8350
1110         tristate "WM8350 GPIOs"
1111         depends on MFD_WM8350
1112         help
1113           Say yes here to access the GPIO signals of WM8350 power management
1114           chips from Wolfson Microelectronics.
1115
1116 config GPIO_WM8994
1117         tristate "WM8994 GPIOs"
1118         depends on MFD_WM8994
1119         help
1120           Say yes here to access the GPIO signals of WM8994 audio hub
1121           CODECs from Wolfson Microelectronics.
1122
1123 endmenu
1124
1125 menu "PCI GPIO expanders"
1126         depends on PCI
1127
1128 config GPIO_AMD8111
1129         tristate "AMD 8111 GPIO driver"
1130         depends on X86 || COMPILE_TEST
1131         help
1132           The AMD 8111 south bridge contains 32 GPIO pins which can be used.
1133
1134           Note, that usually system firmware/ACPI handles GPIO pins on their
1135           own and users might easily break their systems with uncarefull usage
1136           of this driver!
1137
1138           If unsure, say N
1139
1140 config GPIO_BT8XX
1141         tristate "BT8XX GPIO abuser"
1142         depends on VIDEO_BT848=n
1143         help
1144           The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1145           as a cheap PCI GPIO card.
1146
1147           This chip can be found on Miro, Hauppauge and STB TV-cards.
1148
1149           The card needs to be physically altered for using it as a
1150           GPIO card. For more information on how to build a GPIO card
1151           from a BT8xx TV card, see the documentation file at
1152           Documentation/bt8xxgpio.txt
1153
1154           If unsure, say N.
1155
1156 config GPIO_INTEL_MID
1157         bool "Intel MID GPIO support"
1158         depends on X86_INTEL_MID
1159         select GPIOLIB_IRQCHIP
1160         help
1161           Say Y here to support Intel MID GPIO.
1162
1163 config GPIO_MERRIFIELD
1164         tristate "Intel Merrifield GPIO support"
1165         depends on X86_INTEL_MID
1166         select GPIOLIB_IRQCHIP
1167         help
1168           Say Y here to support Intel Merrifield GPIO.
1169
1170 config GPIO_ML_IOH
1171         tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1172         depends on X86 || COMPILE_TEST
1173         select GENERIC_IRQ_CHIP
1174         help
1175           ML7213 is companion chip for Intel Atom E6xx series.
1176           This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
1177           Hub) which is for IVI(In-Vehicle Infotainment) use.
1178           This driver can access the IOH's GPIO device.
1179
1180 config GPIO_PCH
1181         tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
1182         depends on X86_32 || MIPS || COMPILE_TEST
1183         select GENERIC_IRQ_CHIP
1184         help
1185           This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
1186           which is an IOH(Input/Output Hub) for x86 embedded processor.
1187           This driver can access PCH GPIO device.
1188
1189           This driver also can be used for LAPIS Semiconductor IOH(Input/
1190           Output Hub), ML7223 and ML7831.
1191           ML7223 IOH is for MP(Media Phone) use.
1192           ML7831 IOH is for general purpose use.
1193           ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1194           ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1195
1196 config GPIO_PCI_IDIO_16
1197         tristate "ACCES PCI-IDIO-16 GPIO support"
1198         select GPIOLIB_IRQCHIP
1199         help
1200           Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1201           generated when any of the inputs change state (low to high or high to
1202           low). Input filter control is not supported by this driver, and the
1203           input filters are deactivated by this driver.
1204
1205 config GPIO_RDC321X
1206         tristate "RDC R-321x GPIO support"
1207         select MFD_CORE
1208         select MFD_RDC321X
1209         help
1210           Support for the RDC R321x SoC GPIOs over southbridge
1211           PCI configuration space.
1212
1213 config GPIO_SODAVILLE
1214         bool "Intel Sodaville GPIO support"
1215         depends on X86 && OF
1216         select GPIO_GENERIC
1217         select GENERIC_IRQ_CHIP
1218         help
1219           Say Y here to support Intel Sodaville GPIO.
1220
1221 endmenu
1222
1223 menu "SPI GPIO expanders"
1224         depends on SPI_MASTER
1225
1226 config GPIO_74X164
1227         tristate "74x164 serial-in/parallel-out 8-bits shift register"
1228         depends on OF_GPIO
1229         help
1230           Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1231           shift registers. This driver can be used to provide access
1232           to more gpio outputs.
1233
1234 config GPIO_MAX7301
1235         tristate "Maxim MAX7301 GPIO expander"
1236         select GPIO_MAX730X
1237         help
1238           GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1239
1240 config GPIO_MC33880
1241         tristate "Freescale MC33880 high-side/low-side switch"
1242         help
1243           SPI driver for Freescale MC33880 high-side/low-side switch.
1244           This provides GPIO interface supporting inputs and outputs.
1245
1246 config GPIO_PISOSR
1247         tristate "Generic parallel-in/serial-out shift register"
1248         help
1249           GPIO driver for SPI compatible parallel-in/serial-out shift
1250           registers. These are input only devices.
1251
1252 config GPIO_XRA1403
1253         tristate "EXAR XRA1403 16-bit GPIO expander"
1254         select REGMAP_SPI
1255         help
1256           GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1257
1258 endmenu
1259
1260 menu "USB GPIO expanders"
1261         depends on USB
1262
1263 config GPIO_VIPERBOARD
1264         tristate "Viperboard GPIO a & b support"
1265         depends on MFD_VIPERBOARD
1266         help
1267           Say yes here to access the GPIO signals of Nano River
1268           Technologies Viperboard. There are two GPIO chips on the
1269           board: gpioa and gpiob.
1270           See viperboard API specification and Nano
1271           River Tech's viperboard.h for detailed meaning
1272           of the module parameters.
1273
1274 endmenu
1275
1276 endif