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.
66 # put drivers in the right section, in alphabetical order
71 comment "Memory mapped GPIO drivers:"
73 config GPIO_BASIC_MMIO_CORE
76 Provides core functionality for basic memory-mapped GPIO controllers.
78 config GPIO_BASIC_MMIO
79 tristate "Basic memory-mapped GPIO controllers support"
80 select GPIO_BASIC_MMIO_CORE
82 Say yes here to support basic memory-mapped GPIO controllers.
85 tristate "IT8761E GPIO support"
87 Say yes here to support GPIO functionality of IT8761E super I/O chip.
90 bool "Samsung Exynos4 GPIO library support"
91 default y if CPU_EXYNOS4210
94 Say yes here to support Samsung Exynos4 series SoCs GPIO library
100 config GPIO_PLAT_SAMSUNG
101 bool "Samsung SoCs GPIO library support"
102 default y if SAMSUNG_GPIOLIB_4BIT
105 Say yes here to support Samsung SoCs GPIO library
108 bool "Samsung S5PC100 GPIO library support"
109 default y if CPU_S5PC100
112 Say yes here to support Samsung S5PC100 SoCs GPIO library
115 bool "Samsung S5PV210/S5PC110 GPIO library support"
116 default y if CPU_S5PV210
119 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library
122 bool "PrimeCell PL061 GPIO support"
125 Say yes here to support the PrimeCell PL061 GPIO device
128 bool "Xilinx GPIO support"
129 depends on PPC_OF || MICROBLAZE
131 Say yes here to support the Xilinx FPGA GPIO device
134 tristate "NEC VR4100 series General-purpose I/O Uint support"
135 depends on CPU_VR41XX
137 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
140 tristate "Intel SCH/TunnelCreek GPIO"
141 depends on PCI && X86
145 Say yes here to support GPIO interface on Intel Poulsbo SCH
146 or Intel Tunnel Creek processor.
147 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
148 powered by the core power rail and are turned off during sleep
149 modes (S3 and higher). The remaining four GPIOs are powered by
150 the Intel SCH suspend power supply. These GPIOs remain
151 active during S3. The suspend powered GPIOs can be used to wake the
152 system from the Suspend-to-RAM state.
153 The Intel Tunnel Creek processor has 5 GPIOs powered by the
154 core power rail and 9 from suspend power supply.
156 This driver can also be built as a module. If so, the module
157 will be called sch-gpio.
160 tristate "VIA VX855/VX875 GPIO"
161 depends on MFD_SUPPORT && PCI
165 Support access to the VX855/VX875 GPIO lines through the gpio library.
167 This driver provides common support for accessing the device,
168 additional drivers must be enabled in order to use the
169 functionality of the device.
171 comment "I2C GPIO expanders:"
174 tristate "Maxim MAX7300 GPIO expander"
178 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
181 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
184 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
185 Port Expanders. Each IO port on these chips has a fixed role of
186 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
187 Input and Output (designed by 'P'). The combinations are listed
190 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
191 max7322 (4I4O), max7323 (4P4O)
193 16 bits: max7324 (8I8O), max7325 (8P8O),
194 max7326 (4I12O), max7327 (4P12O)
196 Board setup code must specify the model to use, and the start
197 number for these GPIOs.
199 config GPIO_MAX732X_IRQ
200 bool "Interrupt controller support for MAX732x"
201 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
203 Say yes here to enable the max732x to be used as an interrupt
204 controller. It requires the driver to be built in the kernel.
207 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
210 Say yes here to provide access to several register-oriented
211 SMBus I/O expanders, made mostly by NXP or TI. Compatible
214 4 bits: pca9536, pca9537
216 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
219 16 bits: pca9535, pca9539, pca9555, tca6416
221 This driver can also be built as a module. If so, the module
222 will be called pca953x.
224 config GPIO_PCA953X_IRQ
225 bool "Interrupt controller support for PCA953x"
226 depends on GPIO_PCA953X=y
228 Say yes here to enable the pca953x to be used as an interrupt
229 controller. It requires the driver to be built in the kernel.
232 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
235 Say yes here to provide access to most "quasi-bidirectional" I2C
236 GPIO expanders used for additional digital outputs or inputs.
237 Most of these parts are from NXP, though TI is a second source for
238 some of them. Compatible models include:
240 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
241 pca9670, pca9672, pca9674, pca9674a,
244 16 bits: pcf8575, pcf8575c, pca8575,
245 pca9671, pca9673, pca9675
247 Your board setup code will need to declare the expanders in
248 use, and assign numbers to the GPIOs they expose. Those GPIOs
249 can then be used from drivers and other kernel code, just like
250 other GPIOs, but only accessible from task contexts.
252 This driver provides an in-kernel interface to those GPIOs using
253 platform-neutral GPIO calls.
256 bool "Semtech SX150x I2C GPIO expander"
260 Say yes here to provide support for Semtech SX150-series I2C
261 GPIO expanders. Compatible models include:
270 This enables support for the GPIOs found on the STMPE I/O
275 depends on MFD_TC3589X
277 This enables support for the GPIOs found on the TC3589X
281 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
282 depends on TWL4030_CORE
284 Say yes here to access the GPIO signals of various multi-function
285 power management chips from Texas Instruments.
288 tristate "WM831x GPIOs"
289 depends on MFD_WM831X
291 Say yes here to access the GPIO signals of WM831x power management
292 chips from Wolfson Microelectronics.
295 tristate "WM8350 GPIOs"
296 depends on MFD_WM8350
298 Say yes here to access the GPIO signals of WM8350 power management
299 chips from Wolfson Microelectronics.
302 tristate "WM8994 GPIOs"
303 depends on MFD_WM8994
305 Say yes here to access the GPIO signals of WM8994 audio hub
306 CODECs from Wolfson Microelectronics.
309 tristate "GPIO Support for ADP5520 PMIC"
310 depends on PMIC_ADP5520
312 This option enables support for on-chip GPIO found
313 on Analog Devices ADP5520 PMICs.
315 To compile this driver as a module, choose M here: the module will
316 be called adp5520-gpio.
319 tristate "ADP5588 I2C GPIO expander"
322 This option enables support for 18 GPIOs found
323 on Analog Devices ADP5588 GPIO Expanders.
324 To compile this driver as a module, choose M here: the module will be
327 config GPIO_ADP5588_IRQ
328 bool "Interrupt controller support for ADP5588"
329 depends on GPIO_ADP5588=y
331 Say yes here to enable the adp5588 to be used as an interrupt
332 controller. It requires the driver to be built in the kernel.
334 comment "PCI GPIO expanders:"
337 tristate "AMD CS5535/CS5536 GPIO support"
338 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
340 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
341 can be used for quite a number of things. The CS5535/6 is found on
342 AMD Geode and Lemote Yeeloong devices.
347 tristate "BT8XX GPIO abuser"
348 depends on PCI && VIDEO_BT848=n
350 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
351 as a cheap PCI GPIO card.
353 This chip can be found on Miro, Hauppauge and STB TV-cards.
355 The card needs to be physically altered for using it as a
356 GPIO card. For more information on how to build a GPIO card
357 from a BT8xx TV card, see the documentation file at
358 Documentation/bt8xxgpio.txt
363 bool "Intel Langwell/Penwell GPIO support"
364 depends on PCI && X86
366 Say Y here to support Intel Langwell/Penwell GPIO.
369 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
370 depends on PCI && X86
372 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
373 which is an IOH(Input/Output Hub) for x86 embedded processor.
374 This driver can access PCH GPIO device.
376 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
378 ML7223 IOH is for MP(Media Phone) use.
379 ML7223 is companion chip for Intel Atom E6xx series.
380 ML7223 is completely compatible for Intel EG20T PCH.
383 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
386 ML7213 is companion chip for Intel Atom E6xx series.
387 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
388 Hub) which is for IVI(In-Vehicle Infotainment) use.
389 This driver can access the IOH's GPIO device.
391 config GPIO_TIMBERDALE
392 bool "Support for timberdale GPIO IP"
393 depends on MFD_TIMBERDALE && HAS_IOMEM
395 Add support for the GPIO IP in the timberdale FPGA.
398 tristate "RDC R-321x GPIO support"
404 Support for the RDC R321x SoC GPIOs over southbridge
405 PCI configuration space.
407 comment "SPI GPIO expanders:"
410 tristate "Maxim MAX7301 GPIO expander"
411 depends on SPI_MASTER
414 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
417 tristate "Microchip MCP23Sxx I/O expander"
418 depends on SPI_MASTER
420 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
421 This provides a GPIO interface supporting inputs and outputs.
424 tristate "Freescale MC33880 high-side/low-side switch"
425 depends on SPI_MASTER
427 SPI driver for Freescale MC33880 high-side/low-side switch.
428 This provides GPIO interface supporting inputs and outputs.
431 tristate "74x164 serial-in/parallel-out 8-bits shift register"
432 depends on SPI_MASTER
434 Platform driver for 74x164 compatible serial-in/parallel-out
435 8-outputs shift registers. This driver can be used to provide access
436 to more gpio outputs.
438 comment "AC97 GPIO expanders:"
441 bool "Philips UCB1400 GPIO"
442 depends on UCB1400_CORE
444 This enables support for the Philips UCB1400 GPIO pins.
445 The UCB1400 is an AC97 audio codec.
447 To compile this driver as a module, choose M here: the
448 module will be called ucb1400_gpio.
450 comment "MODULbus GPIO expanders:"
453 tristate "Janz VMOD-TTL Digital IO Module"
454 depends on MFD_JANZ_CMODIO
456 This enables support for the Janz VMOD-TTL Digital IO module.
457 This driver provides support for driving the pins in output
458 mode only. Input mode is not supported.
461 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
462 depends on AB8500_CORE && BROKEN
464 Select this to enable the AB8500 IC GPIO driver
468 depends on MFD_TPS65910
470 Select this option to enable GPIO driver for the TPS65910