2 # GPIO infrastructure and drivers
5 config ARCH_WANT_OPTIONAL_GPIOLIB
8 Select this config option from the architecture Kconfig, if
9 it is possible to use gpiolib on the architecture, but let the
10 user decide whether to actually build it or not.
11 Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
12 not depend on GPIOs being available, but rather let the user
13 decide whether he needs it or not.
15 config ARCH_REQUIRE_GPIOLIB
19 Platforms select gpiolib if they use this infrastructure
20 for all their GPIOs, usually starting with ones integrated
22 Selecting this from the architecture code will cause the gpiolib
23 code to always get built in.
29 depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB
32 This enables GPIO support through the generic GPIO library.
33 You only need to enable this, if you also want to enable
34 one or more of the GPIO drivers below.
41 bool "Debug GPIO calls"
42 depends on DEBUG_KERNEL
44 Say Y here to add some extra checks and diagnostics to GPIO calls.
45 These checks help ensure that GPIOs have been properly initialized
46 before they are used, and that sleeping calls are not made from
47 non-sleeping contexts. They can make bitbanged serial protocols
48 slower. The diagnostics help catch the type of setup errors
49 that are most common when setting up new platforms or boards.
52 bool "/sys/class/gpio/... (sysfs interface)"
53 depends on SYSFS && EXPERIMENTAL
55 Say Y here to add a sysfs interface for GPIOs.
57 This is mostly useful to work around omissions in a system's
58 kernel support. Those are common in custom and semicustom
59 hardware assembled using standard kernels with a minimum of
60 custom patches. In those cases, userspace code may import
61 a given GPIO from the kernel, if no kernel driver requested it.
63 Kernel drivers may also request that a particular GPIO be
64 exported to userspace; this can be useful when debugging.
69 # put drivers in the right section, in alphabetical order
72 tristate "Dialog DA9052 GPIO"
73 depends on PMIC_DA9052 && BROKEN
75 Say yes here to enable the GPIO driver for the DA9052 chip.
80 comment "Memory mapped GPIO drivers:"
82 config GPIO_GENERIC_PLATFORM
83 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
86 Say yes here to support basic platform_device memory-mapped GPIO controllers.
89 tristate "IT8761E GPIO support"
90 depends on X86 # unconditional access to IO space.
92 Say yes here to support GPIO functionality of IT8761E super I/O chip.
96 depends on ARCH_EP93XX
100 bool "Lantiq Memory mapped GPIOs"
101 depends on LANTIQ && SOC_XWAY
103 This enables support for memory mapped GPIOs on the External Bus Unit
104 (EBU) found on Lantiq SoCs. The gpios are output only as they are
105 created by attaching a 16bit latch to the bus.
109 depends on PPC_MPC52xx
112 bool "MPC512x/MPC8xxx GPIO support"
113 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
114 FSL_SOC_BOOKE || PPC_86xx
116 Say Y here if you're going to use hardware that connects to the
117 MPC512x/831x/834x/837x/8572/8610 GPIOs.
120 tristate "Qualcomm MSM GPIO v1"
121 depends on GPIOLIB && ARCH_MSM
123 Say yes here to support the GPIO interface on ARM v6 based
124 Qualcomm MSM chips. Most of the pins on the MSM can be
125 selected for GPIO, and are controlled by this driver.
128 tristate "Qualcomm MSM GPIO v2"
129 depends on GPIOLIB && ARCH_MSM
131 Say yes here to support the GPIO interface on ARM v7 based
132 Qualcomm MSM chips. Most of the pins on the MSM can be
133 selected for GPIO, and are controlled by this driver.
139 select GENERIC_IRQ_CHIP
145 select GENERIC_IRQ_CHIP
148 bool "PrimeCell PL061 GPIO support"
150 select GENERIC_IRQ_CHIP
152 Say yes here to support the PrimeCell PL061 GPIO device
155 bool "PXA GPIO support"
156 depends on ARCH_PXA || ARCH_MMP
158 Say yes here to support the PXA GPIO device
161 bool "Xilinx GPIO support"
162 depends on PPC_OF || MICROBLAZE
164 Say yes here to support the Xilinx FPGA GPIO device
167 tristate "NEC VR4100 series General-purpose I/O Uint support"
168 depends on CPU_VR41XX
170 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
173 tristate "Intel SCH/TunnelCreek GPIO"
174 depends on PCI && X86
178 Say yes here to support GPIO interface on Intel Poulsbo SCH
179 or Intel Tunnel Creek processor.
180 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
181 powered by the core power rail and are turned off during sleep
182 modes (S3 and higher). The remaining four GPIOs are powered by
183 the Intel SCH suspend power supply. These GPIOs remain
184 active during S3. The suspend powered GPIOs can be used to wake the
185 system from the Suspend-to-RAM state.
186 The Intel Tunnel Creek processor has 5 GPIOs powered by the
187 core power rail and 9 from suspend power supply.
190 tristate "VIA VX855/VX875 GPIO"
195 Support access to the VX855/VX875 GPIO lines through the gpio library.
197 This driver provides common support for accessing the device,
198 additional drivers must be enabled in order to use the
199 functionality of the device.
202 bool "GE FPGA based GPIO"
205 Support for common GPIO functionality provided on some GE Single Board
208 This driver provides basic support (configure as input or output, read
209 and write pin state) for GPIO implemented in a number of GE single
212 comment "I2C GPIO expanders:"
215 tristate "Maxim MAX7300 GPIO expander"
219 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
222 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
225 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
226 Port Expanders. Each IO port on these chips has a fixed role of
227 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
228 Input and Output (designed by 'P'). The combinations are listed
231 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
232 max7322 (4I4O), max7323 (4P4O)
234 16 bits: max7324 (8I8O), max7325 (8P8O),
235 max7326 (4I12O), max7327 (4P12O)
237 Board setup code must specify the model to use, and the start
238 number for these GPIOs.
240 config GPIO_MAX732X_IRQ
241 bool "Interrupt controller support for MAX732x"
242 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
244 Say yes here to enable the max732x to be used as an interrupt
245 controller. It requires the driver to be built in the kernel.
247 config GPIO_MC9S08DZ60
248 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
249 depends on I2C && MACH_MX35_3DS
251 Select this to enable the MC9S08DZ60 GPIO driver
254 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
257 Say yes here to provide access to several register-oriented
258 SMBus I/O expanders, made mostly by NXP or TI. Compatible
261 4 bits: pca9536, pca9537
263 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
266 16 bits: pca9535, pca9539, pca9555, tca6416
268 config GPIO_PCA953X_IRQ
269 bool "Interrupt controller support for PCA953x"
270 depends on GPIO_PCA953X=y
272 Say yes here to enable the pca953x to be used as an interrupt
273 controller. It requires the driver to be built in the kernel.
276 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
279 Say yes here to provide access to most "quasi-bidirectional" I2C
280 GPIO expanders used for additional digital outputs or inputs.
281 Most of these parts are from NXP, though TI is a second source for
282 some of them. Compatible models include:
284 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
285 pca9670, pca9672, pca9674, pca9674a,
288 16 bits: pcf8575, pcf8575c, pca8575,
289 pca9671, pca9673, pca9675
291 Your board setup code will need to declare the expanders in
292 use, and assign numbers to the GPIOs they expose. Those GPIOs
293 can then be used from drivers and other kernel code, just like
294 other GPIOs, but only accessible from task contexts.
296 This driver provides an in-kernel interface to those GPIOs using
297 platform-neutral GPIO calls.
300 bool "Semtech SX150x I2C GPIO expander"
304 Say yes here to provide support for Semtech SX150-series I2C
305 GPIO expanders. Compatible models include:
314 This enables support for the GPIOs found on the STMPE I/O
318 bool "XWAY STP GPIOs"
321 This enables support for the Serial To Parallel (STP) unit found on
322 XWAY SoC. The STP allows the SoC to drive a shift registers cascade,
323 that can be up to 24 bit. This peripheral is aimed at driving leds.
324 Some of the gpios/leds can be auto updated by the soc with dsl and
329 depends on MFD_TC3589X
331 This enables support for the GPIOs found on the TC3589X
335 tristate "TI TPS65912 GPIO"
336 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
338 This driver supports TPS65912 gpio chip
341 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
342 depends on TWL4030_CORE
344 Say yes here to access the GPIO signals of various multi-function
345 power management chips from Texas Instruments.
348 tristate "WM831x GPIOs"
349 depends on MFD_WM831X
351 Say yes here to access the GPIO signals of WM831x power management
352 chips from Wolfson Microelectronics.
355 tristate "WM8350 GPIOs"
356 depends on MFD_WM8350
358 Say yes here to access the GPIO signals of WM8350 power management
359 chips from Wolfson Microelectronics.
362 tristate "WM8994 GPIOs"
363 depends on MFD_WM8994
365 Say yes here to access the GPIO signals of WM8994 audio hub
366 CODECs from Wolfson Microelectronics.
369 tristate "GPIO Support for ADP5520 PMIC"
370 depends on PMIC_ADP5520
372 This option enables support for on-chip GPIO found
373 on Analog Devices ADP5520 PMICs.
376 tristate "ADP5588 I2C GPIO expander"
379 This option enables support for 18 GPIOs found
380 on Analog Devices ADP5588 GPIO Expanders.
382 config GPIO_ADP5588_IRQ
383 bool "Interrupt controller support for ADP5588"
384 depends on GPIO_ADP5588=y
386 Say yes here to enable the adp5588 to be used as an interrupt
387 controller. It requires the driver to be built in the kernel.
389 comment "PCI GPIO expanders:"
392 tristate "AMD CS5535/CS5536 GPIO support"
393 depends on PCI && X86 && MFD_CS5535
395 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
396 can be used for quite a number of things. The CS5535/6 is found on
397 AMD Geode and Lemote Yeeloong devices.
402 tristate "BT8XX GPIO abuser"
403 depends on PCI && VIDEO_BT848=n
405 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
406 as a cheap PCI GPIO card.
408 This chip can be found on Miro, Hauppauge and STB TV-cards.
410 The card needs to be physically altered for using it as a
411 GPIO card. For more information on how to build a GPIO card
412 from a BT8xx TV card, see the documentation file at
413 Documentation/bt8xxgpio.txt
418 bool "Intel Langwell/Penwell GPIO support"
419 depends on PCI && X86
421 Say Y here to support Intel Langwell/Penwell GPIO.
424 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
425 depends on PCI && X86
426 select GENERIC_IRQ_CHIP
428 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
429 which is an IOH(Input/Output Hub) for x86 embedded processor.
430 This driver can access PCH GPIO device.
432 This driver also can be used for LAPIS Semiconductor IOH(Input/
433 Output Hub), ML7223 and ML7831.
434 ML7223 IOH is for MP(Media Phone) use.
435 ML7831 IOH is for general purpose use.
436 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
437 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
440 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
442 select GENERIC_IRQ_CHIP
444 ML7213 is companion chip for Intel Atom E6xx series.
445 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
446 Hub) which is for IVI(In-Vehicle Infotainment) use.
447 This driver can access the IOH's GPIO device.
449 config GPIO_SODAVILLE
450 bool "Intel Sodaville GPIO support"
451 depends on X86 && PCI && OF
453 select GENERIC_IRQ_CHIP
455 Say Y here to support Intel Sodaville GPIO.
457 config GPIO_TIMBERDALE
458 bool "Support for timberdale GPIO IP"
459 depends on MFD_TIMBERDALE && HAS_IOMEM
461 Add support for the GPIO IP in the timberdale FPGA.
464 tristate "RDC R-321x GPIO support"
469 Support for the RDC R321x SoC GPIOs over southbridge
470 PCI configuration space.
472 comment "SPI GPIO expanders:"
475 tristate "Maxim MAX7301 GPIO expander"
476 depends on SPI_MASTER
479 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
482 tristate "Microchip MCP23xxx I/O expander"
483 depends on SPI_MASTER || I2C
485 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
487 This provides a GPIO interface supporting inputs and outputs.
490 tristate "Freescale MC33880 high-side/low-side switch"
491 depends on SPI_MASTER
493 SPI driver for Freescale MC33880 high-side/low-side switch.
494 This provides GPIO interface supporting inputs and outputs.
497 tristate "74x164 serial-in/parallel-out 8-bits shift register"
498 depends on SPI_MASTER
500 Platform driver for 74x164 compatible serial-in/parallel-out
501 8-outputs shift registers. This driver can be used to provide access
502 to more gpio outputs.
504 comment "AC97 GPIO expanders:"
507 bool "Philips UCB1400 GPIO"
508 depends on UCB1400_CORE
510 This enables support for the Philips UCB1400 GPIO pins.
511 The UCB1400 is an AC97 audio codec.
513 comment "MODULbus GPIO expanders:"
516 tristate "Janz VMOD-TTL Digital IO Module"
517 depends on MFD_JANZ_CMODIO
519 This enables support for the Janz VMOD-TTL Digital IO module.
520 This driver provides support for driving the pins in output
521 mode only. Input mode is not supported.
524 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
525 depends on AB8500_CORE && BROKEN
527 Select this to enable the AB8500 IC GPIO driver
531 depends on MFD_TPS65910
533 Select this option to enable GPIO driver for the TPS65910