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
96 config GPIO_PLAT_SAMSUNG
97 bool "Samsung SoCs GPIO library support"
98 default y if SAMSUNG_GPIOLIB_4BIT
101 Say yes here to support Samsung SoCs GPIO library
104 bool "Samsung S5PC100 GPIO library support"
105 default y if CPU_S5PC100
108 Say yes here to support Samsung S5PC100 SoCs GPIO library
111 bool "Samsung S5PV210/S5PC110 GPIO library support"
112 default y if CPU_S5PV210
115 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library
118 bool "PrimeCell PL061 GPIO support"
121 Say yes here to support the PrimeCell PL061 GPIO device
124 bool "Xilinx GPIO support"
125 depends on PPC_OF || MICROBLAZE
127 Say yes here to support the Xilinx FPGA GPIO device
130 tristate "NEC VR4100 series General-purpose I/O Uint support"
131 depends on CPU_VR41XX
133 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
136 tristate "Intel SCH/TunnelCreek GPIO"
137 depends on PCI && X86
141 Say yes here to support GPIO interface on Intel Poulsbo SCH
142 or Intel Tunnel Creek processor.
143 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
144 powered by the core power rail and are turned off during sleep
145 modes (S3 and higher). The remaining four GPIOs are powered by
146 the Intel SCH suspend power supply. These GPIOs remain
147 active during S3. The suspend powered GPIOs can be used to wake the
148 system from the Suspend-to-RAM state.
149 The Intel Tunnel Creek processor has 5 GPIOs powered by the
150 core power rail and 9 from suspend power supply.
152 This driver can also be built as a module. If so, the module
153 will be called sch-gpio.
156 tristate "VIA VX855/VX875 GPIO"
157 depends on MFD_SUPPORT && PCI
161 Support access to the VX855/VX875 GPIO lines through the gpio library.
163 This driver provides common support for accessing the device,
164 additional drivers must be enabled in order to use the
165 functionality of the device.
167 comment "I2C GPIO expanders:"
170 tristate "Maxim MAX7300 GPIO expander"
174 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
177 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
180 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
181 Port Expanders. Each IO port on these chips has a fixed role of
182 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
183 Input and Output (designed by 'P'). The combinations are listed
186 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
187 max7322 (4I4O), max7323 (4P4O)
189 16 bits: max7324 (8I8O), max7325 (8P8O),
190 max7326 (4I12O), max7327 (4P12O)
192 Board setup code must specify the model to use, and the start
193 number for these GPIOs.
195 config GPIO_MAX732X_IRQ
196 bool "Interrupt controller support for MAX732x"
197 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
199 Say yes here to enable the max732x to be used as an interrupt
200 controller. It requires the driver to be built in the kernel.
203 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
206 Say yes here to provide access to several register-oriented
207 SMBus I/O expanders, made mostly by NXP or TI. Compatible
210 4 bits: pca9536, pca9537
212 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
215 16 bits: pca9535, pca9539, pca9555, tca6416
217 This driver can also be built as a module. If so, the module
218 will be called pca953x.
220 config GPIO_PCA953X_IRQ
221 bool "Interrupt controller support for PCA953x"
222 depends on GPIO_PCA953X=y
224 Say yes here to enable the pca953x to be used as an interrupt
225 controller. It requires the driver to be built in the kernel.
228 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
231 Say yes here to provide access to most "quasi-bidirectional" I2C
232 GPIO expanders used for additional digital outputs or inputs.
233 Most of these parts are from NXP, though TI is a second source for
234 some of them. Compatible models include:
236 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
237 pca9670, pca9672, pca9674, pca9674a,
240 16 bits: pcf8575, pcf8575c, pca8575,
241 pca9671, pca9673, pca9675
243 Your board setup code will need to declare the expanders in
244 use, and assign numbers to the GPIOs they expose. Those GPIOs
245 can then be used from drivers and other kernel code, just like
246 other GPIOs, but only accessible from task contexts.
248 This driver provides an in-kernel interface to those GPIOs using
249 platform-neutral GPIO calls.
252 bool "Semtech SX150x I2C GPIO expander"
256 Say yes here to provide support for Semtech SX150-series I2C
257 GPIO expanders. Compatible models include:
266 This enables support for the GPIOs found on the STMPE I/O
271 depends on MFD_TC3589X
273 This enables support for the GPIOs found on the TC3589X
277 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
278 depends on TWL4030_CORE
280 Say yes here to access the GPIO signals of various multi-function
281 power management chips from Texas Instruments.
284 tristate "WM831x GPIOs"
285 depends on MFD_WM831X
287 Say yes here to access the GPIO signals of WM831x power management
288 chips from Wolfson Microelectronics.
291 tristate "WM8350 GPIOs"
292 depends on MFD_WM8350
294 Say yes here to access the GPIO signals of WM8350 power management
295 chips from Wolfson Microelectronics.
298 tristate "WM8994 GPIOs"
299 depends on MFD_WM8994
301 Say yes here to access the GPIO signals of WM8994 audio hub
302 CODECs from Wolfson Microelectronics.
305 tristate "GPIO Support for ADP5520 PMIC"
306 depends on PMIC_ADP5520
308 This option enables support for on-chip GPIO found
309 on Analog Devices ADP5520 PMICs.
311 To compile this driver as a module, choose M here: the module will
312 be called adp5520-gpio.
315 tristate "ADP5588 I2C GPIO expander"
318 This option enables support for 18 GPIOs found
319 on Analog Devices ADP5588 GPIO Expanders.
320 To compile this driver as a module, choose M here: the module will be
323 config GPIO_ADP5588_IRQ
324 bool "Interrupt controller support for ADP5588"
325 depends on GPIO_ADP5588=y
327 Say yes here to enable the adp5588 to be used as an interrupt
328 controller. It requires the driver to be built in the kernel.
330 comment "PCI GPIO expanders:"
333 tristate "AMD CS5535/CS5536 GPIO support"
334 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
336 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
337 can be used for quite a number of things. The CS5535/6 is found on
338 AMD Geode and Lemote Yeeloong devices.
343 tristate "BT8XX GPIO abuser"
344 depends on PCI && VIDEO_BT848=n
346 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
347 as a cheap PCI GPIO card.
349 This chip can be found on Miro, Hauppauge and STB TV-cards.
351 The card needs to be physically altered for using it as a
352 GPIO card. For more information on how to build a GPIO card
353 from a BT8xx TV card, see the documentation file at
354 Documentation/bt8xxgpio.txt
359 bool "Intel Langwell/Penwell GPIO support"
360 depends on PCI && X86
362 Say Y here to support Intel Langwell/Penwell GPIO.
365 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
366 depends on PCI && X86
368 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
369 which is an IOH(Input/Output Hub) for x86 embedded processor.
370 This driver can access PCH GPIO device.
372 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
374 ML7223 IOH is for MP(Media Phone) use.
375 ML7223 is companion chip for Intel Atom E6xx series.
376 ML7223 is completely compatible for Intel EG20T PCH.
379 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
382 ML7213 is companion chip for Intel Atom E6xx series.
383 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
384 Hub) which is for IVI(In-Vehicle Infotainment) use.
385 This driver can access the IOH's GPIO device.
387 config GPIO_TIMBERDALE
388 bool "Support for timberdale GPIO IP"
389 depends on MFD_TIMBERDALE && HAS_IOMEM
391 Add support for the GPIO IP in the timberdale FPGA.
394 tristate "RDC R-321x GPIO support"
400 Support for the RDC R321x SoC GPIOs over southbridge
401 PCI configuration space.
403 comment "SPI GPIO expanders:"
406 tristate "Maxim MAX7301 GPIO expander"
407 depends on SPI_MASTER
410 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
413 tristate "Microchip MCP23Sxx I/O expander"
414 depends on SPI_MASTER
416 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
417 This provides a GPIO interface supporting inputs and outputs.
420 tristate "Freescale MC33880 high-side/low-side switch"
421 depends on SPI_MASTER
423 SPI driver for Freescale MC33880 high-side/low-side switch.
424 This provides GPIO interface supporting inputs and outputs.
427 tristate "74x164 serial-in/parallel-out 8-bits shift register"
428 depends on SPI_MASTER
430 Platform driver for 74x164 compatible serial-in/parallel-out
431 8-outputs shift registers. This driver can be used to provide access
432 to more gpio outputs.
434 comment "AC97 GPIO expanders:"
437 bool "Philips UCB1400 GPIO"
438 depends on UCB1400_CORE
440 This enables support for the Philips UCB1400 GPIO pins.
441 The UCB1400 is an AC97 audio codec.
443 To compile this driver as a module, choose M here: the
444 module will be called ucb1400_gpio.
446 comment "MODULbus GPIO expanders:"
449 tristate "Janz VMOD-TTL Digital IO Module"
450 depends on MFD_JANZ_CMODIO
452 This enables support for the Janz VMOD-TTL Digital IO module.
453 This driver provides support for driving the pins in output
454 mode only. Input mode is not supported.
457 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
458 depends on AB8500_CORE && BROKEN
460 Select this to enable the AB8500 IC GPIO driver
464 depends on MFD_TPS65910
466 Select this option to enable GPIO driver for the TPS65910