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