1# SPDX-License-Identifier: GPL-2.0-only
   2#
   3# GPIO infrastructure and drivers
   4#
   5
   6menuconfig GPIOLIB
   7	bool "GPIO Support"
   8	help
   9	  This enables GPIO support through the generic GPIO library.
  10	  You only need to enable this if you also want to enable
  11	  one or more of the GPIO drivers below.
  12
  13	  If unsure, say N.
  14
  15if GPIOLIB
  16
  17config GPIOLIB_FASTPATH_LIMIT
  18	int "Maximum number of GPIOs for fast path"
  19	range 32 512
  20	default 512
  21	help
  22	  This adjusts the point at which certain APIs will switch from
  23	  using a stack allocated buffer to a dynamically allocated buffer.
  24
  25	  You shouldn't need to change this unless you really need to
  26	  optimize either stack space or performance. Change this carefully
  27	  since setting an incorrect value could cause stack corruption.
  28
  29config OF_GPIO
  30	def_bool y
  31	depends on OF
  32	depends on HAS_IOMEM
  33
  34config GPIO_ACPI
  35	def_bool y
  36	depends on ACPI
  37
  38config GPIOLIB_IRQCHIP
  39	select IRQ_DOMAIN
  40	bool
  41
  42config OF_GPIO_MM_GPIOCHIP
  43	bool
  44	help
  45	  This adds support for the legacy 'struct of_mm_gpio_chip' interface
  46	  from PowerPC. Existing drivers using this interface need to select
  47	  this symbol, but new drivers should use the generic gpio-regmap
  48	  infrastructure instead.
  49
  50config DEBUG_GPIO
  51	bool "Debug GPIO calls"
  52	depends on DEBUG_KERNEL
  53	help
  54	  Say Y here to add some extra checks and diagnostics to GPIO calls.
  55	  These checks help ensure that GPIOs have been properly initialized
  56	  before they are used, and that sleeping calls are not made from
  57	  non-sleeping contexts.  They can make bitbanged serial protocols
  58	  slower.  The diagnostics help catch the type of setup errors
  59	  that are most common when setting up new platforms or boards.
  60
  61config GPIO_SYSFS
  62	bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
  63	depends on SYSFS
  64	select GPIO_CDEV # We need to encourage the new ABI
  65	help
  66	  Say Y here to add the legacy sysfs interface for GPIOs.
  67
  68	  This ABI is deprecated. If you want to use GPIO from userspace,
  69	  use the character device /dev/gpiochipN with the appropriate
  70	  ioctl() operations instead.
  71
  72config GPIO_CDEV
  73	bool "Character device (/dev/gpiochipN) support" if EXPERT
 
  74	default y
  75	help
  76	  Say Y here to add the character device /dev/gpiochipN interface
  77	  for GPIOs. The character device allows userspace to control GPIOs
  78	  using ioctl() operations.
  79
  80	  Only say N if you are sure that the GPIO character device is not
  81	  required.
  82
  83	  If unsure, say Y.
  84
  85config GPIO_CDEV_V1
  86	bool "Support GPIO ABI Version 1"
  87	default y
  88	depends on GPIO_CDEV
  89	help
  90	  Say Y here to support version 1 of the GPIO CDEV ABI.
  91
  92	  This ABI version is deprecated.
  93	  Please use the latest ABI for new developments.
  94
  95	  If unsure, say Y.
  96
  97config GPIO_GENERIC
  98	depends on HAS_IOMEM # Only for IOMEM drivers
  99	tristate
 100
 101config GPIO_REGMAP
 102	select REGMAP
 103	tristate
 104
 105config GPIO_SWNODE_UNDEFINED
 106	bool
 107	help
 108	  This adds a special place holder for software nodes to contain an
 109	  undefined GPIO reference, this is primarily used by SPI to allow a
 110	  list of GPIO chip selects to mark a certain chip select as being
 111	  controlled the SPI device's internal chip select mechanism and not
 112	  a GPIO.
 113
 114# put drivers in the right section, in alphabetical order
 115
 116# This symbol is selected by both I2C and SPI expanders
 117config GPIO_MAX730X
 118	tristate
 119
 120config GPIO_IDIO_16
 121	tristate
 122	select REGMAP_IRQ
 123	select GPIOLIB_IRQCHIP
 124	select GPIO_REGMAP
 125	help
 126	  Enables support for the idio-16 library functions. The idio-16 library
 127	  provides functions to facilitate communication with devices within the
 128	  ACCES IDIO-16 family such as the 104-IDIO-16 and the PCI-IDIO-16.
 129
 130	  If built as a module its name will be gpio-idio-16.
 131
 132menu "Memory mapped GPIO drivers"
 133	depends on HAS_IOMEM
 134
 135config GPIO_74XX_MMIO
 136	tristate "GPIO driver for 74xx-ICs with MMIO access"
 137	depends on OF_GPIO
 138	select GPIO_GENERIC
 139	help
 140	  Say yes here to support GPIO functionality for 74xx-compatible ICs
 141	  with MMIO access. Compatible models include:
 142	    1 bit:	741G125 (Input), 741G74 (Output)
 143	    2 bits:	742G125 (Input), 7474 (Output)
 144	    4 bits:	74125 (Input), 74175 (Output)
 145	    6 bits:	74365 (Input), 74174 (Output)
 146	    8 bits:	74244 (Input), 74273 (Output)
 147	    16 bits:	741624 (Input), 7416374 (Output)
 148
 149config GPIO_ALTERA
 150	tristate "Altera GPIO"
 
 151	select GPIOLIB_IRQCHIP
 
 152	help
 153	  Say Y or M here to build support for the Altera PIO device.
 154
 155	  If driver is built as a module it will be called gpio-altera.
 156
 157config GPIO_AMDPT
 158	tristate "AMD Promontory GPIO support"
 159	depends on ACPI
 160	select GPIO_GENERIC
 161	help
 162	  Driver for GPIO functionality on Promontory IOHub.
 163	  Requires ACPI ASL code to enumerate as a platform device.
 164
 165config GPIO_ASPEED
 166	tristate "Aspeed GPIO support"
 167	depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
 168	select GPIOLIB_IRQCHIP
 169	help
 170	  Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.
 171
 172config GPIO_ASPEED_SGPIO
 173	bool "Aspeed SGPIO support"
 174	depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
 175	select GPIO_GENERIC
 176	select GPIOLIB_IRQCHIP
 177	help
 178	  Say Y here to support Aspeed AST2500 SGPIO functionality.
 179
 180config GPIO_ATH79
 181	tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
 182	default y if ATH79
 183	depends on ATH79 || COMPILE_TEST
 184	select GPIO_GENERIC
 185	select GPIOLIB_IRQCHIP
 186	help
 187	  Select this option to enable GPIO driver for
 188	  Atheros AR71XX/AR724X/AR913X SoC devices.
 189
 190config GPIO_RASPBERRYPI_EXP
 191	tristate "Raspberry Pi 3 GPIO Expander"
 192	default RASPBERRYPI_FIRMWARE
 193	depends on OF_GPIO
 194	# Make sure not 'y' when RASPBERRYPI_FIRMWARE is 'm'. This can only
 195	# happen when COMPILE_TEST=y, hence the added !RASPBERRYPI_FIRMWARE.
 196	depends on (ARCH_BCM2835 && RASPBERRYPI_FIRMWARE) || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
 197	help
 198	  Turn on GPIO support for the expander on Raspberry Pi 3 boards, using
 199	  the firmware mailbox to communicate with VideoCore on BCM283x chips.
 200
 201config GPIO_BCM_KONA
 202	bool "Broadcom Kona GPIO"
 203	depends on ARCH_BCM_MOBILE || COMPILE_TEST
 204	help
 205	  Turn on GPIO support for Broadcom "Kona" chips.
 206
 207config GPIO_BCM_XGS_IPROC
 208	tristate "BRCM XGS iProc GPIO support"
 209	depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
 210	select GPIO_GENERIC
 211	select GPIOLIB_IRQCHIP
 212	default ARCH_BCM_IPROC
 213	help
 214	  Say yes here to enable GPIO support for Broadcom XGS iProc SoCs.
 215
 216config GPIO_BRCMSTB
 217	tristate "BRCMSTB GPIO support"
 218	default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
 219	depends on OF_GPIO && (ARCH_BRCMSTB || ARCH_BCM2835 || BMIPS_GENERIC || COMPILE_TEST)
 220	select GPIO_GENERIC
 221	select IRQ_DOMAIN
 222	help
 223	  Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
 224
 225config GPIO_CADENCE
 226	tristate "Cadence GPIO support"
 227	depends on OF_GPIO
 228	select GPIO_GENERIC
 229	select GPIOLIB_IRQCHIP
 230	help
 231	  Say yes here to enable support for Cadence GPIO controller.
 232
 233config GPIO_CLPS711X
 234	tristate "CLPS711X GPIO support"
 235	depends on ARCH_CLPS711X || COMPILE_TEST
 236	select GPIO_GENERIC
 237	help
 238	  Say yes here to support GPIO on CLPS711X SoCs.
 239
 240config GPIO_DAVINCI
 241	tristate "TI Davinci/Keystone GPIO support"
 242	default y if ARCH_DAVINCI
 243	depends on ((ARM || ARM64) && (ARCH_DAVINCI || ARCH_KEYSTONE || ARCH_K3)) || COMPILE_TEST
 244	help
 245	  Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
 246
 247config GPIO_DWAPB
 248	tristate "Synopsys DesignWare APB GPIO driver"
 249	select GPIO_GENERIC
 250	select GPIOLIB_IRQCHIP
 251	help
 252	  Say Y or M here to build support for the Synopsys DesignWare APB
 253	  GPIO block.
 254
 255config GPIO_EIC_SPRD
 256	tristate "Spreadtrum EIC support"
 257	depends on ARCH_SPRD || COMPILE_TEST
 258	depends on OF_GPIO
 259	select GPIOLIB_IRQCHIP
 260	help
 261	  Say yes here to support Spreadtrum EIC device.
 262
 263config GPIO_EM
 264	tristate "Emma Mobile GPIO"
 265	depends on (ARCH_EMEV2 || COMPILE_TEST) && OF_GPIO
 266	help
 267	  Say yes here to support GPIO on Renesas Emma Mobile SoCs.
 268
 269config GPIO_EN7523
 270	tristate "Airoha GPIO support"
 271	depends on ARCH_AIROHA
 272	default ARCH_AIROHA
 273	select GPIO_GENERIC
 274	select GPIOLIB_IRQCHIP
 275	help
 276	  Say Y or M here to support the GPIO controller block on the
 277	  Airoha EN7523 SoC. It supports two banks of 32 GPIOs.
 278
 279config GPIO_EP93XX
 280	def_bool y
 281	depends on ARCH_EP93XX
 282	select GPIO_GENERIC
 283	select GPIOLIB_IRQCHIP
 284
 285config GPIO_EXAR
 286	tristate "Support for GPIO pins on XR17V352/354/358"
 287	depends on SERIAL_8250_EXAR
 288	select REGMAP_MMIO
 289	help
 290	  Selecting this option will enable handling of GPIO pins present
 291	  on Exar XR17V352/354/358 chips.
 292
 293config GPIO_GE_FPGA
 294	bool "GE FPGA based GPIO"
 295	depends on GE_FPGA || COMPILE_TEST
 296	select GPIO_GENERIC
 297	help
 298	  Support for common GPIO functionality provided on some GE Single Board
 299	  Computers.
 300
 301	  This driver provides basic support (configure as input or output, read
 302	  and write pin state) for GPIO implemented in a number of GE single
 303	  board computers.
 304
 305config GPIO_FTGPIO010
 306	bool "Faraday FTGPIO010 GPIO"
 307	depends on OF_GPIO
 308	select GPIO_GENERIC
 309	select GPIOLIB_IRQCHIP
 310	default (ARCH_GEMINI || ARCH_MOXART)
 311	help
 312	  Support for common GPIOs from the Faraday FTGPIO010 IP core, found in
 313	  Cortina systems Gemini platforms, Moxa ART and others.
 314
 315config GPIO_GENERIC_PLATFORM
 316	tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
 317	select GPIO_GENERIC
 318	help
 319	  Say yes here to support basic platform_device memory-mapped GPIO controllers.
 320
 321config GPIO_GRANITERAPIDS
 322	tristate "Intel Granite Rapids-D vGPIO support"
 323	depends on X86 || COMPILE_TEST
 324	select GPIOLIB_IRQCHIP
 325	help
 326	  Select this to enable virtual GPIO support on platforms with the
 327	  following SoCs:
 328
 329	  - Intel Granite Rapids-D
 330
 331	  The driver enables basic GPIO functionality and implements interrupt
 332	  support. The virtual GPIO driver controls GPIO lines via a firmware
 333	  interface. The physical GPIO pins reside on device that is external
 334	  from the main SoC package, such as a BMC or a CPLD.
 335
 336	  To compile this driver as a module, choose M here: the module will
 337	  be called gpio-graniterapids.
 338
 339config GPIO_GRGPIO
 340	tristate "Aeroflex Gaisler GRGPIO support"
 341	depends on OF || COMPILE_TEST
 342	select GPIO_GENERIC
 343	select IRQ_DOMAIN
 344	help
 345	  Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
 346	  VHDL IP core library.
 347
 348config GPIO_HISI
 349	tristate "HiSilicon GPIO controller driver"
 350	depends on ARM64 || COMPILE_TEST
 351	select GPIO_GENERIC
 352	select GPIOLIB_IRQCHIP
 353	help
 354	  Say Y or M here to build support for the HiSilicon GPIO controller
 355	  driver GPIO block.
 356	  This GPIO controller supports double-edge interrupt and multi-core
 357	  concurrent access.
 358
 359config GPIO_HLWD
 360	tristate "Nintendo Wii (Hollywood) GPIO"
 361	depends on OF_GPIO
 362	select GPIO_GENERIC
 363	select GPIOLIB_IRQCHIP
 364	help
 365	  Select this to support the GPIO controller of the Nintendo Wii.
 366
 367	  If unsure, say N.
 368
 369config GPIO_ICH
 370	tristate "Intel ICH GPIO"
 371	depends on X86
 372	depends on LPC_ICH
 373	help
 374	  Say yes here to support the GPIO functionality of a number of Intel
 375	  ICH-based chipsets.  Currently supported devices: ICH6, ICH7, ICH8
 376	  ICH9, ICH10, Series 5/3400 (e.g. Ibex Peak), Series 6/C200 (e.g.
 377	  Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake).
 378
 379	  If unsure, say N.
 380
 381config GPIO_IMX_SCU
 382       def_bool y
 383       depends on IMX_SCU
 384
 385config GPIO_IXP4XX
 386	bool "Intel IXP4xx GPIO"
 387	depends on ARCH_IXP4XX
 388	depends on OF
 389	select GPIO_GENERIC
 390	select GPIOLIB_IRQCHIP
 391	select IRQ_DOMAIN_HIERARCHY
 392	help
 393	  Say yes here to support the GPIO functionality of a number of Intel
 394	  IXP4xx series of chips.
 395
 396	  If unsure, say N.
 397
 398config GPIO_LOGICVC
 399	tristate "Xylon LogiCVC GPIO support"
 400	depends on MFD_SYSCON && OF
 401	help
 402	  Say yes here to support GPIO functionality of the Xylon LogiCVC
 403	  programmable logic block.
 404
 405config GPIO_LOONGSON
 406	bool "Loongson-2/3 GPIO support"
 407	depends on CPU_LOONGSON2EF || CPU_LOONGSON64
 408	help
 409	  Driver for GPIO functionality on Loongson-2F/3A/3B processors.
 410
 411config GPIO_LOONGSON_64BIT
 412	tristate "Loongson 64 bit GPIO support"
 413	depends on LOONGARCH || COMPILE_TEST
 414	depends on OF_GPIO
 415	select GPIO_GENERIC
 416	help
 417	  Say yes here to support the GPIO functionality of a number of
 418	  Loongson series of chips. The Loongson GPIO controller supports
 419	  up to 60 GPIOS in total, 4 of which are dedicated GPIO pins, and
 420	  the remaining 56 are reused with other functions, with edge or
 421	  level triggered interrupts.
 422
 423config GPIO_LPC18XX
 424	tristate "NXP LPC18XX/43XX GPIO support"
 425	default y if ARCH_LPC18XX
 426	depends on OF_GPIO && (ARCH_LPC18XX || COMPILE_TEST)
 427	select IRQ_DOMAIN_HIERARCHY
 428	help
 429	  Select this option to enable GPIO driver for
 430	  NXP LPC18XX/43XX devices.
 431
 432config GPIO_LPC32XX
 433	tristate "NXP LPC32XX GPIO support"
 434	depends on OF_GPIO && (ARCH_LPC32XX || COMPILE_TEST)
 435	help
 436	  Select this option to enable GPIO driver for
 437	  NXP LPC32XX devices.
 438
 439config GPIO_MB86S7X
 440	tristate "GPIO support for Fujitsu MB86S7x Platforms"
 441	help
 442	  Say yes here to support the GPIO controller in Fujitsu MB86S70 SoCs.
 443
 444config GPIO_MENZ127
 445	tristate "MEN 16Z127 GPIO support"
 446	depends on MCB
 447	select GPIO_GENERIC
 448	help
 449	  Say yes here to support the MEN 16Z127 GPIO Controller.
 450
 451config GPIO_MM_LANTIQ
 452	bool "Lantiq Memory mapped GPIOs"
 453	depends on LANTIQ && SOC_XWAY
 454	select OF_GPIO_MM_GPIOCHIP
 455	help
 456	  This enables support for memory mapped GPIOs on the External Bus Unit
 457	  (EBU) found on Lantiq SoCs. The GPIOs are output only as they are
 458	  created by attaching a 16-bit latch to the bus.
 459
 460config GPIO_MPC5200
 461	def_bool y
 462	depends on PPC_MPC52xx
 463	select OF_GPIO_MM_GPIOCHIP
 464
 465config GPIO_MPC8XXX
 466	bool "MPC512x/MPC8xxx/QorIQ GPIO support"
 467	depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
 468		   FSL_SOC_BOOKE || PPC_86xx || ARCH_LAYERSCAPE || ARM || \
 469		   COMPILE_TEST
 470	select GPIO_GENERIC
 471	select IRQ_DOMAIN
 472	help
 473	  Say Y here if you're going to use hardware that connects to the
 474	  MPC512x/831x/834x/837x/8572/8610/QorIQ GPIOs.
 475
 476config GPIO_MT7621
 477	bool "Mediatek MT7621 GPIO Support"
 478	depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
 479	depends on OF_GPIO
 480	select GPIO_GENERIC
 481	select GPIOLIB_IRQCHIP
 482	help
 483	  Say yes here to support the Mediatek MT7621 SoC GPIO device.
 484
 485config GPIO_MVEBU
 486	bool "Marvell Orion and EBU GPIO support" if COMPILE_TEST
 487	depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
 488	default PLAT_ORION || ARCH_MVEBU
 489	select GENERIC_IRQ_CHIP
 490	select REGMAP_MMIO
 491
 492config GPIO_MXC
 493	tristate "i.MX GPIO support"
 494	depends on ARCH_MXC || COMPILE_TEST
 495	select GPIO_GENERIC
 496	select GENERIC_IRQ_CHIP
 497
 498config GPIO_MXS
 499	bool "Freescale MXS GPIO support" if COMPILE_TEST
 500	depends on ARCH_MXS || COMPILE_TEST
 501	default y if ARCH_MXS
 502	select GPIO_GENERIC
 503	select GENERIC_IRQ_CHIP
 504
 505config GPIO_NOMADIK
 506	bool "Nomadik GPIO driver"
 507	depends on ARCH_U8500 || ARCH_NOMADIK || MACH_EYEQ5 || COMPILE_TEST
 508	select GPIOLIB_IRQCHIP
 509	help
 510	  Say yes here to support the Nomadik SoC GPIO block. This block is also
 511	  used by the Mobileye EyeQ5 SoC.
 512
 513	  It handles up to 32 GPIOs per bank, that can all be interrupt sources.
 514	  It is deeply interconnected with the associated pinctrl driver as GPIO
 515	  registers handle muxing ("alternate functions") as well.
 516
 517config GPIO_NPCM_SGPIO
 518	bool "Nuvoton SGPIO support"
 519	depends on ARCH_NPCM || COMPILE_TEST
 520	select GPIOLIB_IRQCHIP
 521	help
 522	  Say Y here to support Nuvoton NPCM7XX/NPCM8XX SGPIO functionality.
 523
 524config GPIO_OCTEON
 525	tristate "Cavium OCTEON GPIO"
 526	depends on CAVIUM_OCTEON_SOC
 527	default y
 528	help
 529	  Say yes here to support the on-chip GPIO lines on the OCTEON
 530	  family of SOCs.
 531
 532config GPIO_OMAP
 533	tristate "TI OMAP GPIO support" if ARCH_OMAP2PLUS || COMPILE_TEST
 534	default y if ARCH_OMAP
 535	depends on ARM
 536	select GENERIC_IRQ_CHIP
 537	select GPIOLIB_IRQCHIP
 538	help
 539	  Say yes here to enable GPIO support for TI OMAP SoCs.
 540
 541config GPIO_PL061
 542	tristate "PrimeCell PL061 GPIO support"
 543	depends on ARM_AMBA
 544	select IRQ_DOMAIN
 545	select GPIOLIB_IRQCHIP
 546	help
 547	  Say yes here to support the PrimeCell PL061 GPIO device.
 548
 549config GPIO_POLARFIRE_SOC
 550	bool "Microchip FPGA GPIO support"
 551	select REGMAP_MMIO
 552	help
 553	  Say yes here to support the GPIO controllers on Microchip FPGAs.
 554
 555config GPIO_PXA
 556	bool "PXA GPIO support"
 557	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
 558	help
 559	  Say yes here to support the PXA GPIO device.
 560
 561config GPIO_RCAR
 562	tristate "Renesas R-Car and RZ/G GPIO support"
 563	depends on ARCH_RENESAS || COMPILE_TEST
 564	select GPIOLIB_IRQCHIP
 565	help
 566	  Say yes here to support GPIO on Renesas R-Car or RZ/G SoCs.
 567
 568config GPIO_RDA
 569	bool "RDA Micro GPIO controller support"
 570	depends on ARCH_RDA || COMPILE_TEST
 571	depends on OF_GPIO
 572	select GPIO_GENERIC
 573	select GPIOLIB_IRQCHIP
 574	help
 575	  Say Y here to support RDA Micro GPIO controller.
 576
 577config GPIO_REALTEK_OTTO
 578	tristate "Realtek Otto GPIO support"
 579	depends on MACH_REALTEK_RTL
 580	default MACH_REALTEK_RTL
 581	select GPIO_GENERIC
 582	select GPIOLIB_IRQCHIP
 583	help
 584	  The GPIO controller on the Otto MIPS platform supports up to two
 585	  banks of 32 GPIOs, with edge triggered interrupts. The 32 GPIOs
 586	  are grouped in four 8-bit wide ports.
 587
 588	  When built as a module, the module will be called realtek_otto_gpio.
 589
 590config GPIO_REG
 591	bool
 592	help
 593	  A 32-bit single register GPIO fixed in/out implementation.  This
 594	  can be used to represent any register as a set of GPIO signals.
 595
 596config GPIO_ROCKCHIP
 597	tristate "Rockchip GPIO support"
 598	depends on ARCH_ROCKCHIP || COMPILE_TEST
 599	select GENERIC_IRQ_CHIP
 600	select GPIOLIB_IRQCHIP
 601	default ARCH_ROCKCHIP
 602	help
 603	  Say yes here to support GPIO on Rockchip SoCs.
 604
 605config GPIO_RTD
 606	tristate "Realtek DHC GPIO support"
 607	depends on ARCH_REALTEK
 608	default y
 609	select GPIOLIB_IRQCHIP
 610	help
 611	  This option enables support for GPIOs found on Realtek DHC(Digital
 612	  Home Center) SoCs family, including RTD1295, RTD1315E, RTD1319,
 613	  RTD1319D, RTD1395, RTD1619 and RTD1619B.
 614
 615	  Say yes here to support GPIO functionality and GPIO interrupt on
 616	  Realtek DHC SoCs.
 617
 618config GPIO_SAMA5D2_PIOBU
 619	tristate "SAMA5D2 PIOBU GPIO support"
 620	depends on MFD_SYSCON
 621	depends on OF_GPIO
 622	depends on ARCH_AT91 || COMPILE_TEST
 623	select GPIO_SYSCON
 624	help
 625	  Say yes here to use the PIOBU pins as GPIOs.
 626
 627	  PIOBU pins on the SAMA5D2 can be used as GPIOs.
 628	  The difference from regular GPIOs is that they
 629	  maintain their value during backup/self-refresh.
 630
 631config GPIO_SIFIVE
 632	tristate "SiFive GPIO support"
 633	depends on OF_GPIO
 634	select IRQ_DOMAIN_HIERARCHY
 635	select GPIO_GENERIC
 636	select GPIOLIB_IRQCHIP
 637	select REGMAP_MMIO
 638	help
 639	  Say yes here to support the GPIO device on SiFive SoCs.
 640
 641config GPIO_SIOX
 642	tristate "SIOX GPIO support"
 643	depends on SIOX
 644	select GPIOLIB_IRQCHIP
 645	help
 646	  Say yes here to support SIOX I/O devices. These are units connected
 647	  via a SIOX bus and have a number of fixed-direction I/O lines.
 648
 649config GPIO_SNPS_CREG
 650	bool "Synopsys GPIO via CREG (Control REGisters) driver"
 651	depends on ARC || COMPILE_TEST
 652	depends on OF_GPIO
 653	help
 654	  This driver supports GPIOs via CREG on various Synopsys SoCs.
 655	  This is a single-register MMIO GPIO driver for complex cases
 656	  where only several fields in register belong to GPIO lines and
 657	  each GPIO line owns a field with different length and on/off value.
 658
 659config GPIO_SPEAR_SPICS
 660	bool "ST SPEAr13xx SPI Chip Select as GPIO support"
 661	depends on PLAT_SPEAR
 662	select GENERIC_IRQ_CHIP
 663	help
 664	  Say yes here to support ST SPEAr SPI Chip Select as GPIO device.
 665
 666config GPIO_SPRD
 667	tristate "Spreadtrum GPIO support"
 668	depends on ARCH_SPRD || COMPILE_TEST
 669	depends on OF_GPIO
 670	select GPIOLIB_IRQCHIP
 671	help
 672	  Say yes here to support Spreadtrum GPIO device.
 673
 674config GPIO_STP_XWAY
 675	bool "XWAY STP GPIOs"
 676	depends on SOC_XWAY || COMPILE_TEST
 677	depends on OF_GPIO
 678	help
 679	  This enables support for the Serial To Parallel (STP) unit found on
 680	  XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
 681	  that can be up to 24 bits. This peripheral is aimed at driving LEDs.
 682	  Some of the GPIOs/LEDs can be auto updated by the SoC with DSL and
 683	  phy status.
 684
 685config GPIO_SYSCON
 686	tristate "GPIO based on SYSCON"
 687	depends on MFD_SYSCON && OF
 688	help
 689	  Say yes here to support GPIO functionality though SYSCON driver.
 690
 691config GPIO_TANGIER
 692	tristate
 693	select GPIOLIB_IRQCHIP
 694	help
 695	  GPIO support for Intel Tangier and compatible platforms.
 696	  Currently supported:
 697	   - Elkhart Lake
 698	   - Merrifield
 699
 700	  If built as a module its name will be gpio-tangier.
 701
 702config GPIO_TB10X
 703	bool
 704	select GPIO_GENERIC
 705	select GENERIC_IRQ_CHIP
 706	select OF_GPIO
 707
 708config GPIO_TEGRA
 709	tristate "NVIDIA Tegra GPIO support"
 710	default ARCH_TEGRA
 711	depends on ARCH_TEGRA || COMPILE_TEST
 712	depends on OF_GPIO
 713	select GPIOLIB_IRQCHIP
 714	select IRQ_DOMAIN_HIERARCHY
 715	help
 716	  Say yes here to support GPIO pins on NVIDIA Tegra SoCs.
 717
 718config GPIO_TEGRA186
 719	tristate "NVIDIA Tegra186 GPIO support"
 720	default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || ARCH_TEGRA_234_SOC
 721	depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || ARCH_TEGRA_234_SOC || COMPILE_TEST
 722	depends on OF_GPIO
 723	select GPIOLIB_IRQCHIP
 724	select IRQ_DOMAIN_HIERARCHY
 725	help
 726	  Say yes here to support GPIO pins on NVIDIA Tegra186, 194 and 234 SoCs.
 727
 728config GPIO_TS4800
 729	tristate "TS-4800 DIO blocks and compatibles"
 730	depends on OF_GPIO
 731	depends on SOC_IMX51 || COMPILE_TEST
 732	select GPIO_GENERIC
 733	help
 734	  This driver support TS-4800 FPGA GPIO controllers.
 735
 736config GPIO_THUNDERX
 737	tristate "Cavium ThunderX/OCTEON-TX GPIO"
 738	depends on ARCH_THUNDER || (64BIT && COMPILE_TEST)
 739	depends on PCI_MSI
 740	select GPIOLIB_IRQCHIP
 741	select IRQ_DOMAIN_HIERARCHY
 742	select IRQ_FASTEOI_HIERARCHY_HANDLERS
 743	help
 744	  Say yes here to support the on-chip GPIO lines on the ThunderX
 745	  and OCTEON-TX families of SoCs.
 746
 747config GPIO_UNIPHIER
 748	tristate "UniPhier GPIO support"
 749	depends on ARCH_UNIPHIER || COMPILE_TEST
 750	depends on OF_GPIO
 751	select IRQ_DOMAIN_HIERARCHY
 752	help
 753	  Say yes here to support UniPhier GPIOs.
 754
 755config GPIO_VF610
 756	bool "VF610 GPIO support"
 757	default y if SOC_VF610
 758	depends on ARCH_MXC || COMPILE_TEST
 759	select GPIOLIB_IRQCHIP
 760	help
 761	  Say yes here to support i.MX or Vybrid vf610 GPIOs.
 762
 763config GPIO_VISCONTI
 764	tristate "Toshiba Visconti GPIO support"
 765	depends on ARCH_VISCONTI || COMPILE_TEST
 766	depends on OF_GPIO
 767	select GPIOLIB_IRQCHIP
 768	select GPIO_GENERIC
 769	select IRQ_DOMAIN_HIERARCHY
 770	help
 771	  Say yes here to support GPIO on Tohisba Visconti.
 772
 773config GPIO_WCD934X
 774	tristate "Qualcomm Technologies Inc WCD9340/WCD9341 GPIO controller driver"
 775	depends on MFD_WCD934X && OF_GPIO
 776	help
 777         This driver is to support GPIO block found on the Qualcomm Technologies
 778	 Inc WCD9340/WCD9341 Audio Codec.
 779
 780config GPIO_XGENE
 781	bool "APM X-Gene GPIO controller support"
 782	depends on ARM64 && OF_GPIO
 783	help
 784	  This driver is to support the GPIO block within the APM X-Gene SoC
 785	  platform's generic flash controller. The GPIO pins are muxed with
 786	  the generic flash controller's address and data pins. Say yes
 787	  here to enable the GFC GPIO functionality.
 788
 789config GPIO_XGENE_SB
 790	tristate "APM X-Gene GPIO standby controller support"
 791	depends on (ARCH_XGENE || COMPILE_TEST)
 792	select GPIO_GENERIC
 793	select GPIOLIB_IRQCHIP
 794	select IRQ_DOMAIN_HIERARCHY
 795	help
 796	  This driver supports the GPIO block within the APM X-Gene
 797	  Standby Domain. Say yes here to enable the GPIO functionality.
 798
 799config GPIO_XILINX
 800	tristate "Xilinx GPIO support"
 801	select GPIOLIB_IRQCHIP
 
 802	help
 803	  Say yes here to support the Xilinx FPGA GPIO device.
 804
 805config GPIO_XLP
 806	tristate "Cavium ThunderX2 GPIO support"
 807	depends on ARCH_THUNDER2 || COMPILE_TEST
 808	select GPIOLIB_IRQCHIP
 809	help
 810	  This driver provides support for GPIO interface on Cavium's ThunderX2
 811	  CN99XX SoCs (Originally from Netlogic XLP).
 812
 813	  If unsure, say N.
 814
 815config GPIO_XTENSA
 816	bool "Xtensa GPIO32 support"
 817	depends on XTENSA
 818	depends on HAVE_XTENSA_GPIO32
 819	depends on !SMP
 820	help
 821	  Say yes here to support the Xtensa internal GPIO32 IMPWIRE (input)
 822	  and EXPSTATE (output) ports.
 823
 824config GPIO_ZEVIO
 825	bool "LSI ZEVIO SoC memory mapped GPIOs"
 826	depends on ARM
 827	help
 828	  Say yes here to support the GPIO controller in LSI ZEVIO SoCs.
 829
 830config GPIO_ZYNQ
 831	tristate "Xilinx Zynq GPIO support"
 832	depends on ARCH_ZYNQ || ARCH_ZYNQMP
 833	select GPIOLIB_IRQCHIP
 834	help
 835	  Say yes here to support Xilinx Zynq GPIO controller.
 836
 837config GPIO_ZYNQMP_MODEPIN
 838	tristate "ZynqMP ps-mode pin GPIO configuration driver"
 839	depends on ZYNQMP_FIRMWARE
 840	default ZYNQMP_FIRMWARE
 841	help
 842	  Say yes here to support the ZynqMP ps-mode pin GPIO configuration
 843	  driver.
 844
 845	  This ps-mode pin GPIO driver is based on GPIO framework. PS_MODE
 846	  is 4-bits boot mode pins. It sets and gets the status of
 847	  the ps-mode pin. Every pin can be configured as input/output.
 848
 849config GPIO_LOONGSON1
 850	tristate "Loongson1 GPIO support"
 851	depends on MACH_LOONGSON32
 852	select GPIO_GENERIC
 853	help
 854	  Say Y or M here to support GPIO on Loongson1 SoCs.
 855
 856config GPIO_AMD_FCH
 857	tristate "GPIO support for AMD Fusion Controller Hub (G-series SOCs)"
 858	help
 859	  This option enables driver for GPIO on AMD's Fusion Controller Hub,
 860	  as found on G-series SOCs (e.g. GX-412TC).
 861
 862	  Note: This driver doesn't register itself automatically, as it
 863	  needs to be provided with platform-specific configuration.
 864	  (See e.g. CONFIG_PCENGINES_APU2.)
 865
 866config GPIO_MSC313
 867	bool "MStar MSC313 GPIO support"
 868	depends on ARCH_MSTARV7
 869	default ARCH_MSTARV7
 870	select GPIOLIB_IRQCHIP
 871	select IRQ_DOMAIN_HIERARCHY
 872	help
 873	  Say Y here to support the main GPIO block on MStar/SigmaStar
 874	  ARMv7-based SoCs.
 875
 876config GPIO_IDT3243X
 877	tristate "IDT 79RC3243X GPIO support"
 878	depends on MIKROTIK_RB532 || COMPILE_TEST
 879	select GPIO_GENERIC
 880	select GPIOLIB_IRQCHIP
 881	help
 882	  Select this option to enable GPIO driver for
 883	  IDT 79RC3243X-based devices like Mikrotik RB532.
 884
 885	  To compile this driver as a module, choose M here: the module will
 886	  be called gpio-idt3243x.
 887
 888endmenu
 889
 890menu "Port-mapped I/O GPIO drivers"
 891	depends on X86 && HAS_IOPORT # I/O space access
 892
 893config GPIO_VX855
 894	tristate "VIA VX855/VX875 GPIO"
 895	depends on PCI
 896	select MFD_CORE
 897	select MFD_VX855
 898	help
 899	  Support access to the VX855/VX875 GPIO lines through the GPIO library.
 900
 901	  This driver provides common support for accessing the device.
 902	  Additional drivers must be enabled in order to use the
 903	  functionality of the device.
 904
 905config GPIO_I8255
 906	tristate
 907	select GPIO_REGMAP
 908	help
 909	  Enables support for the i8255 interface library functions. The i8255
 910	  interface library provides functions to facilitate communication with
 911	  interfaces compatible with the venerable Intel 8255 Programmable
 912	  Peripheral Interface (PPI). The Intel 8255 PPI chip was first released
 913	  in the early 1970s but compatible interfaces are nowadays typically
 914	  found embedded in larger VLSI processing chips and FPGA components.
 915
 916	  If built as a module its name will be gpio-i8255.
 917
 918config GPIO_104_DIO_48E
 919	tristate "ACCES 104-DIO-48E GPIO support"
 920	depends on PC104
 921	select ISA_BUS_API
 922	select REGMAP_MMIO
 923	select REGMAP_IRQ
 924	select GPIOLIB_IRQCHIP
 925	select GPIO_I8255
 926	select I8254
 927	help
 928	  Enables GPIO support for the ACCES 104-DIO-48E series (104-DIO-48E,
 929	  104-DIO-24E). The base port addresses for the devices may be
 930	  configured via the base module parameter. The interrupt line numbers
 931	  for the devices may be configured via the irq module parameter.
 932
 933config GPIO_104_IDIO_16
 934	tristate "ACCES 104-IDIO-16 GPIO support"
 935	depends on PC104
 936	select ISA_BUS_API
 937	select REGMAP_MMIO
 938	select GPIO_IDIO_16
 939	help
 940	  Enables GPIO support for the ACCES 104-IDIO-16 family (104-IDIO-16,
 941	  104-IDIO-16E, 104-IDO-16, 104-IDIO-8, 104-IDIO-8E, 104-IDO-8). The
 942	  base port addresses for the devices may be configured via the base
 943	  module parameter. The interrupt line numbers for the devices may be
 944	  configured via the irq module parameter.
 945
 946config GPIO_104_IDI_48
 947	tristate "ACCES 104-IDI-48 GPIO support"
 948	depends on PC104
 949	select ISA_BUS_API
 950	select REGMAP_MMIO
 951	select REGMAP_IRQ
 952	select GPIOLIB_IRQCHIP
 953	select GPIO_REGMAP
 954	help
 955	  Enables GPIO support for the ACCES 104-IDI-48 family (104-IDI-48A,
 956	  104-IDI-48AC, 104-IDI-48B, 104-IDI-48BC). The base port addresses for
 957	  the devices may be configured via the base module parameter. The
 958	  interrupt line numbers for the devices may be configured via the irq
 959	  module parameter.
 960
 961config GPIO_F7188X
 962	tristate "Fintek and Nuvoton Super-I/O GPIO support"
 963	help
 964	  This option enables support for GPIOs found on Fintek Super-I/O
 965	  chips F71869, F71869A, F71882FG, F71889F and F81866.
 966	  As well as Nuvoton Super-I/O chip NCT6126D.
 967
 968	  To compile this driver as a module, choose M here: the module will
 969	  be called f7188x-gpio.
 970
 971config GPIO_GPIO_MM
 972	tristate "Diamond Systems GPIO-MM GPIO support"
 973	depends on PC104
 974	select ISA_BUS_API
 975	select REGMAP_MMIO
 976	select GPIO_I8255
 977	help
 978	  Enables GPIO support for the Diamond Systems GPIO-MM and GPIO-MM-12.
 979
 980	  The Diamond Systems GPIO-MM device features 48 lines of digital I/O
 981	  via the emulation of dual 82C55A PPI chips. This driver provides GPIO
 982	  support for these 48 channels of digital I/O.
 983
 984	  The base port addresses for the devices may be configured via the base
 985	  array module parameter.
 986
 987config GPIO_IT87
 988	tristate "IT87xx GPIO support"
 989	help
 990	  Say yes here to support GPIO functionality of IT87xx Super I/O chips.
 991
 992	  This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and
 993	  supports the IT8761E, IT8613, IT8620E, and IT8628E Super I/O chips as
 994	  well.
 995
 996	  To compile this driver as a module, choose M here: the module will
 997	  be called gpio_it87.
 998
 999config GPIO_SCH
1000	tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO"
1001	depends on (X86 || COMPILE_TEST) && ACPI
1002	depends on LPC_SCH
1003	select GPIOLIB_IRQCHIP
1004	help
1005	  Say yes here to support GPIO interface on Intel Poulsbo SCH,
1006	  Intel Tunnel Creek processor, Intel Centerton processor or
1007	  Intel Quark X1000 SoC.
1008
1009	  The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
1010	  powered by the core power rail and are turned off during sleep
1011	  modes (S3 and higher). The remaining four GPIOs are powered by
1012	  the Intel SCH suspend power supply. These GPIOs remain
1013	  active during S3. The suspend-powered GPIOs can be used to wake the
1014	  system from the Suspend-to-RAM state.
1015
1016	  The Intel Tunnel Creek processor has 5 GPIOs powered by the
1017	  core power rail and 9 from suspend power supply.
1018
1019	  The Intel Centerton processor has a total of 30 GPIO pins.
1020	  Twenty-one are powered by the core power rail and 9 from the
1021	  suspend power supply.
1022
1023	  The Intel Quark X1000 SoC has 2 GPIOs powered by the core
1024	  power well and 6 from the suspend power well.
1025
1026config GPIO_SCH311X
1027	tristate "SMSC SCH311x SuperI/O GPIO"
1028	help
1029	  Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and
1030	  SCH3116 "Super I/O" chipsets.
1031
1032	  To compile this driver as a module, choose M here: the module will
1033	  be called gpio-sch311x.
1034
1035config GPIO_TS5500
1036	tristate "TS-5500 DIO blocks and compatibles"
1037	depends on TS5500 || COMPILE_TEST
1038	help
1039	  This driver supports Digital I/O exposed by pin blocks found on some
1040	  Technologic Systems platforms. It includes, but is not limited to, 3
1041	  blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600
1042	  LCD port.
1043
1044config GPIO_WINBOND
1045	tristate "Winbond Super I/O GPIO support"
1046	select ISA_BUS_API
1047	help
1048	  This option enables support for GPIOs found on Winbond Super I/O
1049	  chips.
1050	  Currently, only W83627UHG (also known as Nuvoton NCT6627UD) is
1051	  supported.
1052
1053	  You will need to provide a module parameter "gpios", or a
1054	  boot-time parameter "gpio_winbond.gpios" with a bitmask of GPIO
1055	  ports to enable (bit 0 is GPIO1, bit 1 is GPIO2, etc.).
1056
1057	  To compile this driver as a module, choose M here: the module will
1058	  be called gpio-winbond.
1059
1060config GPIO_WS16C48
1061	tristate "WinSystems WS16C48 GPIO support"
1062	select ISA_BUS_API
1063	select REGMAP_IRQ
1064	select REGMAP_MMIO
1065	select GPIOLIB_IRQCHIP
1066	select GPIO_REGMAP
1067	help
1068	  Enables GPIO support for the WinSystems WS16C48. The base port
1069	  addresses for the devices may be configured via the base module
1070	  parameter. The interrupt line numbers for the devices may be
1071	  configured via the irq module parameter.
1072
1073endmenu
1074
1075menu "I2C GPIO expanders"
1076	depends on I2C
1077
1078config GPIO_ADNP
1079	tristate "Avionic Design N-bit GPIO expander"
1080	depends on OF_GPIO
1081	select GPIOLIB_IRQCHIP
1082	help
1083	  This option enables support for N GPIOs found on Avionic Design
1084	  I2C GPIO expanders. The register space will be extended by powers
1085	  of two, so the controller will need to accommodate for that. For
1086	  example: if a controller provides 48 pins, 6 registers will be
1087	  enough to represent all pins, but the driver will assume a
1088	  register layout for 64 pins (8 registers).
1089
1090config GPIO_FXL6408
1091	tristate "FXL6408 I2C GPIO expander"
1092	select GPIO_REGMAP
1093	select REGMAP_I2C
1094	help
1095	  GPIO driver for Fairchild Semiconductor FXL6408 GPIO expander.
1096
1097	  To compile this driver as a module, choose M here: the module will
1098	  be called gpio-fxl6408.
1099
1100config GPIO_DS4520
1101	tristate "DS4520 I2C GPIO expander"
1102	select REGMAP_I2C
1103	select GPIO_REGMAP
1104	help
1105	  GPIO driver for ADI DS4520 I2C-based GPIO expander.
1106	  Say yes here to enable the GPIO driver for the ADI DS4520 chip.
1107
1108	  To compile this driver as a module, choose M here: the module will
1109	  be called gpio-ds4520.
1110
1111config GPIO_GW_PLD
1112	tristate "Gateworks PLD GPIO Expander"
1113	depends on OF_GPIO
1114	help
1115	  Say yes here to provide access to the Gateworks I2C PLD GPIO
1116	  Expander. This is used at least on the Cambria GW2358-4.
1117
1118config GPIO_MAX7300
1119	tristate "Maxim MAX7300 GPIO expander"
1120	select GPIO_MAX730X
1121	help
1122	  GPIO driver for Maxim MAX7300 I2C-based GPIO expander.
1123
1124config GPIO_MAX732X
1125	tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
1126	help
1127	  Say yes here to support the MAX7319, MAX7320-7327 series of I2C
1128	  Port Expanders. Each IO port on these chips has a fixed role of
1129	  Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
1130	  Input and Output (designed by 'P'). The combinations are listed
1131	  below:
1132
1133	  8 bits:       max7319 (8I), max7320 (8O), max7321 (8P),
1134	                max7322 (4I4O), max7323 (4P4O)
1135
1136	  16 bits:      max7324 (8I8O), max7325 (8P8O),
1137	                max7326 (4I12O), max7327 (4P12O)
1138
1139	  Board setup code must specify the model to use, and the start
1140	  number for these GPIOs.
1141
1142config GPIO_MAX732X_IRQ
1143	bool "Interrupt controller support for MAX732x"
1144	depends on GPIO_MAX732X=y
1145	select GPIOLIB_IRQCHIP
1146	help
1147	  Say yes here to enable the max732x to be used as an interrupt
1148	  controller. It requires the driver to be built in the kernel.
1149
1150config GPIO_PCA953X
1151	tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports"
1152	select REGMAP_I2C
1153	help
1154	  Say yes here to provide access to several register-oriented
1155	  SMBus I/O expanders, made mostly by NXP or TI.  Compatible
1156	  models include:
1157
1158	  4 bits:       pca9536, pca9537
1159
1160	  8 bits:       max7310, max7315, pca6107, pca9534, pca9538, pca9554,
1161	                pca9556, pca9557, pca9574, tca6408, tca9554, xra1202
1162
1163	  16 bits:      max7312, max7313, pca9535, pca9539, pca9555, pca9575,
1164	                tca6416
1165
1166	  24 bits:      tca6424
1167
1168	  40 bits:      pca9505, pca9698
1169
1170config GPIO_PCA953X_IRQ
1171	bool "Interrupt controller support for PCA953x"
1172	depends on GPIO_PCA953X
1173	select GPIOLIB_IRQCHIP
1174	help
1175	  Say yes here to enable the pca953x to be used as an interrupt
1176	  controller.
1177
1178config GPIO_PCA9570
1179	tristate "PCA9570 4-Bit I2C GPO expander"
1180	help
1181	  Say yes here to enable the GPO driver for the NXP PCA9570 chip.
1182
1183	  To compile this driver as a module, choose M here: the module will
1184	  be called gpio-pca9570.
1185
1186config GPIO_PCF857X
1187	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
1188	select GPIOLIB_IRQCHIP
1189	select IRQ_DOMAIN
1190	help
1191	  Say yes here to provide access to most "quasi-bidirectional" I2C
1192	  GPIO expanders used for additional digital outputs or inputs.
1193	  Most of these parts are from NXP, though TI is a second source for
1194	  some of them.  Compatible models include:
1195
1196	  8 bits:   pcf8574, pcf8574a, pca8574, pca8574a,
1197	            pca9670, pca9672, pca9674, pca9674a,
1198	            max7328, max7329
1199
1200	  16 bits:  pcf8575, pcf8575c, pca8575,
1201	            pca9671, pca9673, pca9675
1202
1203	  Your board setup code will need to declare the expanders in
1204	  use, and assign numbers to the GPIOs they expose.  Those GPIOs
1205	  can then be used from drivers and other kernel code, just like
1206	  other GPIOs, but only accessible from task contexts.
1207
1208	  This driver provides an in-kernel interface to those GPIOs using
1209	  platform-neutral GPIO calls.
1210
1211config GPIO_TPIC2810
1212	tristate "TPIC2810 8-Bit I2C GPO expander"
1213	help
1214	  Say yes here to enable the GPO driver for the TI TPIC2810 chip.
1215
1216	  To compile this driver as a module, choose M here: the module will
1217	  be called gpio-tpic2810.
1218
1219config GPIO_TS4900
1220	tristate "Technologic Systems FPGA I2C GPIO"
1221	depends on SOC_IMX6 || COMPILE_TEST
1222	select REGMAP_I2C
1223	help
1224	  Say yes here to enabled the GPIO driver for Technologic's FPGA core.
1225	  Series supported include TS-4100, TS-4900, TS-7970 and TS-7990.
1226
1227endmenu
1228
1229menu "MFD GPIO expanders"
1230
1231config GPIO_ADP5520
1232	tristate "GPIO Support for ADP5520 PMIC"
1233	depends on PMIC_ADP5520
1234	help
1235	  This option enables support for on-chip GPIO found
1236	  on Analog Devices ADP5520 PMICs.
1237
1238config GPIO_ADP5585
1239	tristate "GPIO Support for ADP5585"
1240	depends on MFD_ADP5585
1241	help
1242	  This option enables support for the GPIO function found in the Analog
1243	  Devices ADP5585.
1244
1245config GPIO_ALTERA_A10SR
1246	tristate "Altera Arria10 System Resource GPIO"
1247	depends on MFD_ALTERA_A10SR
1248	help
1249	  Driver for Arria10 Development Kit GPIO expansion which
1250	  includes reads of pushbuttons and DIP switches as well
1251	  as writes to LEDs.
1252
1253config GPIO_ARIZONA
1254	tristate "Wolfson Microelectronics Arizona class devices"
1255	depends on MFD_ARIZONA
1256	help
1257	  Support for GPIOs on Wolfson Arizona class devices.
1258
1259config GPIO_BD71815
1260	tristate "ROHM BD71815 PMIC GPIO support"
1261	depends on MFD_ROHM_BD71828
1262	help
1263	  Support for GPO(s) on ROHM BD71815 PMIC. There are two GPOs
1264	  available on the ROHM PMIC.
1265
1266	  This driver can also be built as a module. If so, the module
1267	  will be called gpio-bd71815.
1268
1269config GPIO_BD71828
1270	tristate "ROHM BD71828 GPIO support"
1271	depends on MFD_ROHM_BD71828
1272	help
1273	  Support for GPIOs on ROHM BD71828 PMIC. There are three GPIOs
1274	  available on the ROHM PMIC in total. The GPIOs are limited to
1275	  outputs only and pins must be configured to GPIO outputs by
1276	  OTP. Enable this only if you want to use these pins as outputs.
1277
1278	  This driver can also be built as a module. If so, the module
1279	  will be called gpio-bd71828.
1280
1281config GPIO_BD9571MWV
1282	tristate "ROHM BD9571 GPIO support"
1283	depends on MFD_BD9571MWV
1284	help
1285	  Support for GPIOs on ROHM BD9571 PMIC. There are two GPIOs
1286	  available on the ROHM PMIC in total, both of which can also
1287	  generate interrupts.
1288
1289	  This driver can also be built as a module. If so, the module
1290	  will be called gpio-bd9571mwv.
1291
1292config GPIO_CGBC
1293	tristate "Congatec Board Controller GPIO support"
1294	depends on MFD_CGBC
1295	help
1296	  Select this option to enable GPIO support for the Congatec Board
1297	  Controller.
1298
1299	  This driver can also be built as a module. If so, the module will be
1300	  called gpio-cgbc.
1301
1302config GPIO_CROS_EC
1303	tristate "ChromeOS EC GPIO support"
1304	depends on CROS_EC
1305	help
1306	  GPIO driver for the ChromeOS Embedded Controller (EC). GPIOs
1307	  cannot be set unless the system is unlocked.
1308
1309	  This driver can also be built as a module. If so, the module
1310	  will be called gpio-cros-ec.
1311
1312config GPIO_CRYSTAL_COVE
1313	tristate "GPIO support for Crystal Cove PMIC"
1314	depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC
1315	select GPIOLIB_IRQCHIP
1316	help
1317	  Support for GPIO pins on Crystal Cove PMIC.
1318
1319	  Say Yes if you have a Intel SoC-based tablet with Crystal Cove PMIC
1320	  inside.
1321
1322	  This driver can also be built as a module. If so, the module will be
1323	  called gpio-crystalcove.
1324
1325config GPIO_CS5535
1326	tristate "AMD CS5535/CS5536 GPIO support"
1327	depends on X86 || MIPS || COMPILE_TEST
1328	depends on MFD_CS5535
1329	help
1330	  The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
1331	  can be used for quite a number of things.  The CS5535/6 is found on
1332	  AMD Geode and Lemote Yeeloong devices.
1333
1334	  If unsure, say N.
1335
1336config GPIO_DA9052
1337	tristate "Dialog DA9052 GPIO"
1338	depends on PMIC_DA9052
1339	help
1340	  Say yes here to enable the GPIO driver for the DA9052 chip.
1341
1342config GPIO_DA9055
1343	tristate "Dialog Semiconductor DA9055 GPIO"
1344	depends on MFD_DA9055
1345	help
1346	  Say yes here to enable the GPIO driver for the DA9055 chip.
1347
1348	  The Dialog DA9055 PMIC chip has 3 GPIO pins that can be
1349	  be controlled by this driver.
1350
1351	  If driver is built as a module it will be called gpio-da9055.
1352
1353config GPIO_DLN2
1354	tristate "Diolan DLN2 GPIO support"
1355	depends on MFD_DLN2
1356	select GPIOLIB_IRQCHIP
1357
1358	help
1359	  Select this option to enable GPIO driver for the Diolan DLN2
1360	  board.
1361
1362	  This driver can also be built as a module. If so, the module
1363	  will be called gpio-dln2.
1364
1365config HTC_EGPIO
1366	bool "HTC EGPIO support"
1367	depends on ARM
1368	help
1369	  This driver supports the CPLD egpio chip present on
1370	  several HTC phones.  It provides basic support for input
1371	  pins, output pins, and IRQs.
1372
1373config GPIO_ELKHARTLAKE
1374	tristate "Intel Elkhart Lake PSE GPIO support"
1375	depends on X86 || COMPILE_TEST
1376	select GPIO_TANGIER
1377	help
1378	  Select this option to enable GPIO support for Intel Elkhart Lake
1379	  PSE GPIO IP.
1380
1381	  To compile this driver as a module, choose M here: the module will
1382	  be called gpio-elkhartlake.
1383
1384config GPIO_JANZ_TTL
1385	tristate "Janz VMOD-TTL Digital IO Module"
1386	depends on MFD_JANZ_CMODIO
1387	help
1388	  This enables support for the Janz VMOD-TTL Digital IO module.
1389	  This driver provides support for driving the pins in output
1390	  mode only. Input mode is not supported.
1391
1392config GPIO_KEMPLD
1393	tristate "Kontron ETX / COMexpress GPIO"
1394	depends on MFD_KEMPLD
1395	help
1396	  This enables support for the PLD GPIO interface on some Kontron ETX
1397	  and COMexpress (ETXexpress) modules.
1398
1399	  This driver can also be built as a module. If so, the module will be
1400	  called gpio-kempld.
1401
1402config GPIO_LJCA
1403	tristate "INTEL La Jolla Cove Adapter GPIO support"
1404	depends on USB_LJCA
1405	select GPIOLIB_IRQCHIP
1406	default USB_LJCA
1407	help
1408	  Select this option to enable GPIO driver for the INTEL
1409	  La Jolla Cove Adapter (LJCA) board.
1410
1411	  This driver can also be built as a module. If so, the module
1412	  will be called gpio-ljca.
1413
1414config GPIO_LP3943
1415	tristate "TI/National Semiconductor LP3943 GPIO expander"
1416	depends on MFD_LP3943
1417	help
1418	  GPIO driver for LP3943 MFD.
1419	  LP3943 can be used as a GPIO expander which provides up to 16 GPIOs.
1420	  Open drain outputs are required for this usage.
1421
1422config GPIO_LP873X
1423	tristate "TI LP873X GPO"
1424	depends on MFD_TI_LP873X
1425	help
1426	  This driver supports the GPO on TI Lp873x PMICs. 2 GPOs are present
1427	  on LP873X PMICs.
1428
1429	  This driver can also be built as a module. If so, the module will be
1430	  called gpio-lp873x.
1431
1432config GPIO_LP87565
1433	tristate "TI LP87565 GPIO"
1434	depends on MFD_TI_LP87565
1435	help
1436	  This driver supports the GPIO on TI Lp873565 PMICs. 3 GPIOs are present
1437	  on LP87565 PMICs.
1438
1439	  This driver can also be built as a module. If so, the module will be
1440	  called gpio-lp87565.
1441
1442config GPIO_MADERA
1443	tristate "Cirrus Logic Madera class codecs"
1444	depends on PINCTRL_MADERA
1445	help
1446	  Support for GPIOs on Cirrus Logic Madera class codecs.
1447
1448config GPIO_MAX77620
1449	tristate "GPIO support for PMIC MAX77620 and MAX20024"
1450	depends on MFD_MAX77620
1451	select GPIOLIB_IRQCHIP
1452	help
1453	  GPIO driver for MAX77620 and MAX20024 PMIC from Maxim Semiconductor.
1454	  MAX77620 PMIC has 8 pins that can be configured as GPIOs. The
1455	  driver also provides interrupt support for each of the GPIOs.
1456	  Say yes here to enable the max77620 to be used as GPIO controller.
1457
1458config GPIO_MAX77650
1459	tristate "Maxim MAX77650/77651 GPIO support"
1460	depends on MFD_MAX77650
1461	help
1462	  GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
1463	  These chips have a single pin that can be configured as GPIO.
1464
1465config GPIO_PALMAS
1466	bool "TI PALMAS series PMICs GPIO"
1467	depends on MFD_PALMAS
1468	help
1469	  Select this option to enable GPIO driver for the TI PALMAS
1470	  series chip family.
1471
1472config GPIO_PMIC_EIC_SPRD
1473	tristate "Spreadtrum PMIC EIC support"
1474	depends on MFD_SC27XX_PMIC || COMPILE_TEST
1475	depends on OF_GPIO
1476	select GPIOLIB_IRQCHIP
1477	help
1478	  Say yes here to support Spreadtrum PMIC EIC device.
1479
1480config GPIO_RC5T583
1481	bool "RICOH RC5T583 GPIO"
1482	depends on MFD_RC5T583
1483	help
1484	  Select this option to enable GPIO driver for the Ricoh RC5T583
1485	  chip family.
1486	  This driver provides the support for driving/reading the GPIO pins
1487	  of RC5T583 device through standard GPIO library.
1488
1489config GPIO_SL28CPLD
1490	tristate "Kontron sl28cpld GPIO support"
1491	depends on MFD_SL28CPLD || COMPILE_TEST
1492	select GPIO_REGMAP
1493	select GPIOLIB_IRQCHIP
1494	select REGMAP_IRQ
1495	help
1496	  This enables support for the GPIOs found on the Kontron sl28 CPLD.
1497
1498	  This driver can also be built as a module. If so, the module will be
1499	  called gpio-sl28cpld.
1500
1501config GPIO_STMPE
1502	bool "STMPE GPIOs"
1503	depends on MFD_STMPE
1504	depends on OF_GPIO
1505	select GPIOLIB_IRQCHIP
1506	help
1507	  This enables support for the GPIOs found on the STMPE I/O
1508	  Expanders.
1509
1510config GPIO_TC3589X
1511	bool "TC3589X GPIOs"
1512	depends on MFD_TC3589X
1513	depends on OF_GPIO
1514	select GPIOLIB_IRQCHIP
1515	help
1516	  This enables support for the GPIOs found on the TC3589X
1517	  I/O Expander.
1518
1519config GPIO_TIMBERDALE
1520	bool "Support for timberdale GPIO IP"
1521	depends on MFD_TIMBERDALE
1522	help
1523	Add support for the GPIO IP in the timberdale FPGA.
1524
1525config GPIO_TN48M_CPLD
1526	tristate "Delta Networks TN48M switch CPLD GPIO driver"
1527	depends on MFD_TN48M_CPLD
1528	select GPIO_REGMAP
1529	help
1530	  This enables support for the GPIOs found on the Delta
1531	  Networks TN48M switch Lattice CPLD. It provides 12 pins in total,
1532	  they are input-only or output-only type.
1533
1534	  This driver can also be built as a module. If so, the
1535	  module will be called gpio-tn48m.
1536
1537config GPIO_TPS65086
1538	tristate "TI TPS65086 GPO"
1539	depends on MFD_TPS65086
1540	help
1541	  This driver supports the GPO on TI TPS65086x PMICs.
1542
1543config GPIO_TPS65218
1544	tristate "TPS65218 GPIO"
1545	depends on MFD_TPS65218
1546	help
1547	  Select this option to enable GPIO driver for the TPS65218
1548	  chip family.
1549
1550config GPIO_TPS65219
1551	tristate "TPS65219 GPIO"
1552	depends on MFD_TPS65219
1553	default MFD_TPS65219
1554	help
1555	  Select this option to enable GPIO driver for the TPS65219 chip
1556	  family.
1557	  GPIO0 is statically configured as either input or output prior to
1558	  Linux boot. It is used for MULTI_DEVICE_ENABLE function. This setting
1559	  is statically configured by NVM. GPIO0 can't be used as a generic
1560	  GPIO. It's either a GPO when MULTI_DEVICE_EN=0 or a GPI when
1561	  MULTI_DEVICE_EN=1.
1562
1563	  This driver can also be built as a module. If so, the module will be
1564	  called gpio_tps65219.
1565
1566config GPIO_TPS6586X
1567	bool "TPS6586X GPIO"
1568	depends on MFD_TPS6586X
1569	help
1570	  Select this option to enable GPIO driver for the TPS6586X
1571	  chip family.
1572
1573config GPIO_TPS65910
1574	bool "TPS65910 GPIO"
1575	depends on MFD_TPS65910
1576	help
1577	  Select this option to enable GPIO driver for the TPS65910
1578	  chip family.
1579
1580config GPIO_TPS65912
1581	tristate "TI TPS65912 GPIO"
1582	depends on MFD_TPS65912
1583	help
1584	  This driver supports TPS65912 GPIO chip.
1585
1586config GPIO_TPS68470
1587	tristate "TPS68470 GPIO"
1588	depends on INTEL_SKL_INT3472
1589	help
1590	  Select this option to enable GPIO driver for the TPS68470
1591	  chip family.
1592	  There are 7 GPIOs and few sensor-related GPIOs supported
1593	  by the TPS68470. While the 7 GPIOs can be configured as
1594	  input or output as appropriate, the sensor related GPIOs
1595	  are "output only" GPIOs.
1596
1597config GPIO_TQMX86
1598	tristate "TQ-Systems TQMx86 GPIO"
1599	depends on MFD_TQMX86 || COMPILE_TEST
1600	depends on HAS_IOPORT_MAP
1601	select GPIOLIB_IRQCHIP
1602	help
1603	  This driver supports GPIO on the TQMX86 IO controller.
1604
1605config GPIO_TWL4030
1606	tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
1607	depends on TWL4030_CORE
1608	help
1609	  Say yes here to access the GPIO signals of various multi-function
1610	  power management chips from Texas Instruments.
1611
1612config GPIO_TWL6040
1613	tristate "TWL6040 GPO"
1614	depends on TWL6040_CORE
1615	help
1616	  Say yes here to access the GPO signals of twl6040
1617	  audio chip from Texas Instruments.
1618
1619config GPIO_WHISKEY_COVE
1620	tristate "GPIO support for Whiskey Cove PMIC"
1621	depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC_BXTWC
1622	select GPIOLIB_IRQCHIP
1623	help
1624	  Support for GPIO pins on Whiskey Cove PMIC.
1625
1626	  Say Yes if you have an Intel SoC-based tablet with Whiskey Cove PMIC
1627	  inside.
1628
1629	  This driver can also be built as a module. If so, the module will be
1630	  called gpio-wcove.
1631
1632config GPIO_WM831X
1633	tristate "WM831x GPIOs"
1634	depends on MFD_WM831X
1635	help
1636	  Say yes here to access the GPIO signals of WM831x power management
1637	  chips from Wolfson Microelectronics.
1638
1639config GPIO_WM8350
1640	tristate "WM8350 GPIOs"
1641	depends on MFD_WM8350
1642	help
1643	  Say yes here to access the GPIO signals of WM8350 power management
1644	  chips from Wolfson Microelectronics.
1645
1646config GPIO_WM8994
1647	tristate "WM8994 GPIOs"
1648	depends on MFD_WM8994
1649	help
1650	  Say yes here to access the GPIO signals of WM8994 audio hub
1651	  CODECs from Wolfson Microelectronics.
1652
1653endmenu
1654
1655menu "PCI GPIO expanders"
1656	depends on PCI
1657
1658config GPIO_AMD8111
1659	tristate "AMD 8111 GPIO driver"
1660	depends on X86 || COMPILE_TEST
1661	depends on HAS_IOPORT_MAP
1662	help
1663	  The AMD 8111 southbridge contains 32 GPIO pins which can be used.
1664
1665	  Note that usually system firmware/ACPI handles GPIO pins on their
1666	  own and users might easily break their systems with uncareful usage
1667	  of this driver!
1668
1669	  If unsure, say N
1670
1671config GPIO_BT8XX
1672	tristate "BT8XX GPIO abuser"
1673	depends on VIDEO_BT848=n
1674	help
1675	  The BT8xx frame grabber chip has 24 GPIO pins that can be abused
1676	  as a cheap PCI GPIO card.
1677
1678	  This chip can be found on Miro, Hauppauge and STB TV-cards.
1679
1680	  The card needs to be physically altered for using it as a
1681	  GPIO card. For more information on how to build a GPIO card
1682	  from a BT8xx TV card, see the documentation file at
1683	  Documentation/driver-api/gpio/bt8xxgpio.rst
1684
1685	  If unsure, say N.
1686
1687config GPIO_MERRIFIELD
1688	tristate "Intel Merrifield GPIO support"
1689	depends on X86_INTEL_MID
1690	select GPIO_TANGIER
1691	help
1692	  Say Y here to support Intel Merrifield GPIO.
1693
1694config GPIO_MLXBF
1695	tristate "Mellanox BlueField SoC GPIO"
1696	depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1697	select GPIO_GENERIC
1698	help
1699	  Say Y here if you want GPIO support on Mellanox BlueField SoC.
1700
1701config GPIO_MLXBF2
1702	tristate "Mellanox BlueField 2 SoC GPIO"
1703	depends on (MELLANOX_PLATFORM && ARM64 && ACPI) || (64BIT && COMPILE_TEST)
1704	select GPIO_GENERIC
1705	select GPIOLIB_IRQCHIP
1706	help
1707	  Say Y here if you want GPIO support on Mellanox BlueField 2 SoC.
1708
1709config GPIO_MLXBF3
1710	tristate "Mellanox BlueField 3 SoC GPIO"
1711	depends on (MELLANOX_PLATFORM && ARM64) || COMPILE_TEST
1712	select GPIO_GENERIC
1713	select GPIOLIB_IRQCHIP
1714	help
1715	  Say Y if you want GPIO support on Mellanox BlueField 3 SoC.
1716	  This GPIO controller supports interrupt handling and enables the
1717	  manipulation of certain GPIO pins.
1718	  This controller should be used in parallel with pinctrl-mlxbf3 to
1719	  control the desired GPIOs.
1720	  This driver can also be built as a module called mlxbf3-gpio.
1721
1722config GPIO_ML_IOH
1723	tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
1724	depends on X86 || COMPILE_TEST
1725	select GENERIC_IRQ_CHIP
1726	help
1727	  ML7213 is companion chip for Intel Atom E6xx series.
1728	  This driver can be used for OKI SEMICONDUCTOR ML7213 IOH (Input/Output
1729	  Hub) which is for IVI (In-Vehicle Infotainment) use.
1730	  This driver can access the IOH's GPIO device.
1731
1732config GPIO_PCH
1733	tristate "Intel EG20T PCH/LAPIS Semiconductor IOH (ML7223/ML7831) GPIO"
1734	depends on X86_32 || MIPS || COMPILE_TEST
1735	select GENERIC_IRQ_CHIP
1736	help
1737	  This driver is for PCH (Platform Controller Hub) GPIO of Intel Topcliff,
1738	  which is an IOH (Input/Output Hub) for x86 embedded processor.
1739	  This driver can access PCH GPIO device.
1740
1741	  This driver also can be used for LAPIS Semiconductor IOH (Input/
1742	  Output Hub), ML7223 and ML7831.
1743	  ML7223 IOH is for MP (Media Phone) use.
1744	  ML7831 IOH is for general purpose use.
1745	  ML7223/ML7831 is companion chip for Intel Atom E6xx series.
1746	  ML7223/ML7831 is completely compatible for Intel EG20T PCH.
1747
1748config GPIO_PCI_IDIO_16
1749	tristate "ACCES PCI-IDIO-16 GPIO support"
1750	select REGMAP_MMIO
1751	select GPIO_IDIO_16
1752	help
1753	  Enables GPIO support for the ACCES PCI-IDIO-16. An interrupt is
1754	  generated when any of the inputs change state (low to high or high to
1755	  low). Input filter control is not supported by this driver, and the
1756	  input filters are deactivated by this driver.
1757
1758config GPIO_PCIE_IDIO_24
1759	tristate "ACCES PCIe-IDIO-24 GPIO support"
1760	select REGMAP_IRQ
1761	select REGMAP_MMIO
1762	select GPIOLIB_IRQCHIP
1763	select GPIO_REGMAP
1764	help
1765	  Enables GPIO support for the ACCES PCIe-IDIO-24 family (PCIe-IDIO-24,
1766	  PCIe-IDI-24, PCIe-IDO-24, PCIe-IDIO-12). An interrupt is generated
1767	  when any of the inputs change state (low to high or high to low).
1768	  Input filter control is not supported by this driver, and the input
1769	  filters are deactivated by this driver.
1770
1771config GPIO_RDC321X
1772	tristate "RDC R-321x GPIO support"
1773	select MFD_CORE
1774	select MFD_RDC321X
1775	help
1776	  Support for the RDC R321x SoC GPIOs over southbridge
1777	  PCI configuration space.
1778
1779config GPIO_SODAVILLE
1780	bool "Intel Sodaville GPIO support"
1781	depends on X86 && OF
1782	select GPIO_GENERIC
1783	select GENERIC_IRQ_CHIP
1784	help
1785	  Say Y here to support Intel Sodaville GPIO.
1786
1787endmenu
1788
1789menu "SPI GPIO expanders"
1790	depends on SPI_MASTER
1791
1792config GPIO_74X164
1793	tristate "74x164 serial-in/parallel-out 8-bits shift register"
1794	depends on OF_GPIO
1795	help
1796	  Driver for 74x164 compatible serial-in/parallel-out 8-outputs
1797	  shift registers. This driver can be used to provide access
1798	  to more GPIO outputs.
1799
1800config GPIO_MAX3191X
1801	tristate "Maxim MAX3191x industrial serializer"
1802	select CRC8
1803	help
1804	  GPIO driver for Maxim MAX31910, MAX31911, MAX31912, MAX31913,
1805	  MAX31953 and MAX31963 industrial serializer, a daisy-chainable
1806	  chip to make 8 digital 24V inputs available via SPI.  Supports
1807	  CRC checksums to guard against electromagnetic interference,
1808	  as well as undervoltage and overtemperature detection.
1809
1810config GPIO_MAX7301
1811	tristate "Maxim MAX7301 GPIO expander"
1812	select GPIO_MAX730X
1813	help
1814	  GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
1815
1816config GPIO_MC33880
1817	tristate "Freescale MC33880 high-side/low-side switch"
1818	help
1819	  SPI driver for Freescale MC33880 high-side/low-side switch.
1820	  This provides GPIO interface supporting inputs and outputs.
1821
1822config GPIO_PISOSR
1823	tristate "Generic parallel-in/serial-out shift register"
1824	help
1825	  GPIO driver for SPI compatible parallel-in/serial-out shift
1826	  registers. These are input only devices.
1827
1828config GPIO_XRA1403
1829	tristate "EXAR XRA1403 16-bit GPIO expander"
1830	select REGMAP_SPI
1831	help
1832	  GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander.
1833
1834config GPIO_MOXTET
1835	tristate "Turris Mox Moxtet bus GPIO expander"
1836	depends on MOXTET
1837	help
1838	  Say yes here if you are building for the Turris Mox router.
1839	  This is the driver needed for configuring the GPIOs via the Moxtet
1840	  bus. For example the Mox module with SFP cage needs this driver
1841	  so that phylink can use corresponding GPIOs.
1842
1843endmenu
1844
1845menu "USB GPIO expanders"
1846	depends on USB
1847
1848config GPIO_VIPERBOARD
1849	tristate "Viperboard GPIO a & b support"
1850	depends on MFD_VIPERBOARD
1851	help
1852	  Say yes here to access the GPIO signals of Nano River
1853	  Technologies Viperboard. There are two GPIO chips on the
1854	  board: gpioa and gpiob.
1855	  See viperboard API specification and Nano
1856	  River Tech's viperboard.h for detailed meaning
1857	  of the module parameters.
1858
1859config GPIO_MPSSE
1860	tristate "FTDI MPSSE GPIO support"
1861	select GPIOLIB_IRQCHIP
1862	help
1863	  GPIO driver for FTDI's MPSSE interface. These can do input and
1864	  output. Each MPSSE provides 16 IO pins.
1865
1866endmenu
1867
1868menu "Virtual GPIO drivers"
1869
1870config GPIO_AGGREGATOR
1871	tristate "GPIO Aggregator"
1872	help
1873	  Say yes here to enable the GPIO Aggregator, which provides a way to
1874	  aggregate existing GPIO lines into a new virtual GPIO chip.
1875	  This can serve the following purposes:
1876	    - Assign permissions for a collection of GPIO lines to a user,
1877	    - Export a collection of GPIO lines to a virtual machine,
1878	    - Provide a generic driver for a GPIO-operated device in an
1879	      industrial control context, to be operated from userspace using
1880	      the GPIO chardev interface.
1881
1882config GPIO_LATCH
1883	tristate "GPIO latch driver"
1884	help
1885	  Say yes here to enable a driver for GPIO multiplexers based on latches
1886	  connected to other GPIOs.
1887
1888config GPIO_MOCKUP
1889	tristate "GPIO Testing Driver (DEPRECATED)"
1890	select IRQ_SIM
1891	help
1892	  This module is DEPRECATED. Please consider using gpio-sim instead.
1893
1894	  This enables GPIO Testing driver, which provides a way to test GPIO
1895	  subsystem through sysfs (or char device) and debugfs.
1896	  User could use it through the script in
1897	  tools/testing/selftests/gpio/gpio-mockup.sh. Reference the usage in
1898	  it.
1899
1900config GPIO_VIRTIO
1901	tristate "VirtIO GPIO support"
1902	depends on VIRTIO
1903	select GPIOLIB_IRQCHIP
1904	help
1905	  Say Y here to enable guest support for virtio-based GPIO controllers.
1906
1907	  These virtual GPIOs can be routed to real GPIOs or attached to
1908	  simulators on the host (like QEMU).
1909
1910config GPIO_SIM
1911	tristate "GPIO Simulator Module"
1912	select IRQ_SIM
1913	select CONFIGFS_FS
1914	help
1915	  This enables the GPIO simulator - a configfs-based GPIO testing
1916	  driver.
1917
1918endmenu
1919
1920menu "GPIO Debugging utilities"
1921
1922config GPIO_SLOPPY_LOGIC_ANALYZER
1923	tristate "Sloppy GPIO logic analyzer"
1924	depends on (GPIOLIB || COMPILE_TEST) && CPUSETS && DEBUG_FS && EXPERT
1925	help
1926	  This option enables support for a sloppy logic analyzer using polled
1927	  GPIOs. Use the 'tools/gpio/gpio-sloppy-logic-analyzer' script with
1928	  this driver. The script will make it easier to use and will also
1929	  isolate a CPU for the polling task. Note that this is a last resort
1930	  analyzer which can be affected by latencies, non-deterministic code
1931	  paths, or NMIs. However, for e.g. remote development, it may be useful
1932	  to get a first view and aid further debugging.
1933
1934	  If this driver is built as a module it will be called
1935	  'gpio-sloppy-logic-analyzer'.
1936
1937config GPIO_VIRTUSER
1938	tristate "GPIO Virtual User Testing Module"
1939	select DEBUG_FS
1940	select CONFIGFS_FS
1941	select IRQ_WORK
1942	help
1943	  Say Y here to enable the configurable, configfs-based virtual GPIO
1944	  consumer testing driver.
1945
1946	  This driver is aimed as a helper in spotting any regressions in
1947	  hot-unplug handling in GPIOLIB.
1948
1949endmenu
1950
1951endif