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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
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
86config 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
98config GPIO_GENERIC
99 depends on HAS_IOMEM # Only for IOMEM drivers
100 tristate
101
102config GPIO_REGMAP
103 select REGMAP
104 tristate
105
106config 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
118config GPIO_MAX730X
119 tristate
120
121config 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
133menu "Memory mapped GPIO drivers"
134 depends on HAS_IOMEM
135
136config 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
150config 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
160config 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
168config 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
175config 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
183config 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
193config 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
204config 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
210config 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
219config 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
228config 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
236config 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
243config 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
250config 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
258config 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
266config 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
272config 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
282config GPIO_EP93XX
283 def_bool y
284 depends on ARCH_EP93XX
285 select GPIO_GENERIC
286 select GPIOLIB_IRQCHIP
287
288config 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
296config 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
308config 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
318config 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
324config 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
342config 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
351config 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
362config 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
372config 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
384config GPIO_IMX_SCU
385 def_bool y
386 depends on IMX_SCU
387
388config 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
401config 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
408config 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
414config 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
426config 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
435config 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
442config 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
447config 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
454config 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
463config GPIO_MPC5200
464 def_bool y
465 depends on PPC_MPC52xx
466 select OF_GPIO_MM_GPIOCHIP
467
468config 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
479config 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
488config 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
495config 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
501config 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
508config 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
520config 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
527config 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
535config 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
544config 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
552config 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
558config 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
565config 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
574config 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
587config 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
593config 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
602config 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
615config 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
628config 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
638config 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
646config 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
656config 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
663config 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
671config 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
682config 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
688config 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
699config GPIO_TB10X
700 bool
701 select GPIO_GENERIC
702 select GENERIC_IRQ_CHIP
703 select OF_GPIO
704
705config 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
715config 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
725config 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
733config 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
744config 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
752config 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
760config 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
770config 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
777config 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
786config 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
796config 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
803config 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
813config 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
822config 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
828config 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
835config 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
847config 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
854config 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
864config 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
874config 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
886endmenu
887
888menu "Port-mapped I/O GPIO drivers"
889 depends on X86 && HAS_IOPORT # I/O space access
890
891config 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
903config 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
916config 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
931config 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
944config 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
959config 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
969config 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
985config 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
997config 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
1024config 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
1033config 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
1042config 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
1058config 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
1071endmenu
1072
1073menu "I2C GPIO expanders"
1074 depends on I2C
1075
1076config 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
1088config 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
1098config 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
1109config 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
1116config 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
1122config 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
1140config 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
1148config 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
1168config 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
1176config 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
1184config 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
1209config 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
1217config 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
1225endmenu
1226
1227menu "MFD GPIO expanders"
1228
1229config 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
1236config 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
1243config 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
1251config 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
1257config 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
1267config 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
1279config 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
1290config 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
1300config 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
1313config 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
1324config 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
1330config 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
1341config 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
1353config 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
1361config 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
1372config 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
1380config 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
1390config 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
1402config 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
1410config 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
1420config 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
1430config 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
1436config 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
1446config 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
1453config 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
1460config 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
1468config 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
1477config 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
1489config 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
1498config 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
1507config 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
1513config 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
1525config 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
1531config 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
1538config 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
1554config 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
1561config 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
1568config GPIO_TPS65912
1569 tristate "TI TPS65912 GPIO"
1570 depends on MFD_TPS65912
1571 help
1572 This driver supports TPS65912 GPIO chip.
1573
1574config 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
1585config 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
1593config 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
1600config 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
1607config 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
1620config 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
1627config 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
1634config 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
1641endmenu
1642
1643menu "PCI GPIO expanders"
1644 depends on PCI
1645
1646config 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
1659config 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
1675config 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
1682config 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
1689config 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
1697config 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
1710config 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
1720config 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
1736config 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
1746config 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
1759config 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
1767config 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
1775endmenu
1776
1777menu "SPI GPIO expanders"
1778 depends on SPI_MASTER
1779
1780config 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
1788config 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
1798config 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
1804config 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
1810config 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
1816config 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
1822config 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
1831endmenu
1832
1833menu "USB GPIO expanders"
1834 depends on USB
1835
1836config 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
1847endmenu
1848
1849menu "Virtual GPIO drivers"
1850
1851config 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
1863config 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
1869config 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
1881config 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
1891config 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
1899endmenu
1900
1901menu "GPIO Debugging utilities"
1902
1903config 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
1918config 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
1930endmenu
1931
1932endif