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
93 Say yes here to support Samsung Exynos4 series SoCs GPIO library
95 config GPIO_PLAT_SAMSUNG
96 bool "Samsung SoCs GPIO library support"
97 default y if SAMSUNG_GPIOLIB_4BIT
99 Say yes here to support Samsung SoCs GPIO library
102 bool "Samsung S5PC100 GPIO library support"
103 default y if CPU_S5PC100
105 Say yes here to support Samsung S5PC100 SoCs GPIO library
108 bool "Samsung S5PV210/S5PC110 GPIO library support"
109 default y if CPU_S5PV210
111 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library
114 bool "PrimeCell PL061 GPIO support"
117 Say yes here to support the PrimeCell PL061 GPIO device
120 bool "Xilinx GPIO support"
121 depends on PPC_OF || MICROBLAZE
123 Say yes here to support the Xilinx FPGA GPIO device
126 tristate "NEC VR4100 series General-purpose I/O Uint support"
127 depends on CPU_VR41XX
129 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
132 tristate "Intel SCH/TunnelCreek GPIO"
133 depends on PCI && X86
137 Say yes here to support GPIO interface on Intel Poulsbo SCH
138 or Intel Tunnel Creek processor.
139 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
140 powered by the core power rail and are turned off during sleep
141 modes (S3 and higher). The remaining four GPIOs are powered by
142 the Intel SCH suspend power supply. These GPIOs remain
143 active during S3. The suspend powered GPIOs can be used to wake the
144 system from the Suspend-to-RAM state.
145 The Intel Tunnel Creek processor has 5 GPIOs powered by the
146 core power rail and 9 from suspend power supply.
148 This driver can also be built as a module. If so, the module
149 will be called sch-gpio.
152 tristate "VIA VX855/VX875 GPIO"
153 depends on MFD_SUPPORT && PCI
157 Support access to the VX855/VX875 GPIO lines through the gpio library.
159 This driver provides common support for accessing the device,
160 additional drivers must be enabled in order to use the
161 functionality of the device.
163 comment "I2C GPIO expanders:"
166 tristate "Maxim MAX7300 GPIO expander"
170 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
173 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
176 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
177 Port Expanders. Each IO port on these chips has a fixed role of
178 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
179 Input and Output (designed by 'P'). The combinations are listed
182 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
183 max7322 (4I4O), max7323 (4P4O)
185 16 bits: max7324 (8I8O), max7325 (8P8O),
186 max7326 (4I12O), max7327 (4P12O)
188 Board setup code must specify the model to use, and the start
189 number for these GPIOs.
191 config GPIO_MAX732X_IRQ
192 bool "Interrupt controller support for MAX732x"
193 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
195 Say yes here to enable the max732x to be used as an interrupt
196 controller. It requires the driver to be built in the kernel.
199 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
202 Say yes here to provide access to several register-oriented
203 SMBus I/O expanders, made mostly by NXP or TI. Compatible
206 4 bits: pca9536, pca9537
208 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
211 16 bits: pca9535, pca9539, pca9555, tca6416
213 This driver can also be built as a module. If so, the module
214 will be called pca953x.
216 config GPIO_PCA953X_IRQ
217 bool "Interrupt controller support for PCA953x"
218 depends on GPIO_PCA953X=y
220 Say yes here to enable the pca953x to be used as an interrupt
221 controller. It requires the driver to be built in the kernel.
224 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
227 Say yes here to provide access to most "quasi-bidirectional" I2C
228 GPIO expanders used for additional digital outputs or inputs.
229 Most of these parts are from NXP, though TI is a second source for
230 some of them. Compatible models include:
232 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
233 pca9670, pca9672, pca9674, pca9674a,
236 16 bits: pcf8575, pcf8575c, pca8575,
237 pca9671, pca9673, pca9675
239 Your board setup code will need to declare the expanders in
240 use, and assign numbers to the GPIOs they expose. Those GPIOs
241 can then be used from drivers and other kernel code, just like
242 other GPIOs, but only accessible from task contexts.
244 This driver provides an in-kernel interface to those GPIOs using
245 platform-neutral GPIO calls.
248 bool "Semtech SX150x I2C GPIO expander"
252 Say yes here to provide support for Semtech SX150-series I2C
253 GPIO expanders. Compatible models include:
262 This enables support for the GPIOs found on the STMPE I/O
267 depends on MFD_TC3589X
269 This enables support for the GPIOs found on the TC3589X
273 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
274 depends on TWL4030_CORE
276 Say yes here to access the GPIO signals of various multi-function
277 power management chips from Texas Instruments.
280 tristate "WM831x GPIOs"
281 depends on MFD_WM831X
283 Say yes here to access the GPIO signals of WM831x power management
284 chips from Wolfson Microelectronics.
287 tristate "WM8350 GPIOs"
288 depends on MFD_WM8350
290 Say yes here to access the GPIO signals of WM8350 power management
291 chips from Wolfson Microelectronics.
294 tristate "WM8994 GPIOs"
295 depends on MFD_WM8994
297 Say yes here to access the GPIO signals of WM8994 audio hub
298 CODECs from Wolfson Microelectronics.
301 tristate "GPIO Support for ADP5520 PMIC"
302 depends on PMIC_ADP5520
304 This option enables support for on-chip GPIO found
305 on Analog Devices ADP5520 PMICs.
307 To compile this driver as a module, choose M here: the module will
308 be called adp5520-gpio.
311 tristate "ADP5588 I2C GPIO expander"
314 This option enables support for 18 GPIOs found
315 on Analog Devices ADP5588 GPIO Expanders.
316 To compile this driver as a module, choose M here: the module will be
319 config GPIO_ADP5588_IRQ
320 bool "Interrupt controller support for ADP5588"
321 depends on GPIO_ADP5588=y
323 Say yes here to enable the adp5588 to be used as an interrupt
324 controller. It requires the driver to be built in the kernel.
326 comment "PCI GPIO expanders:"
329 tristate "AMD CS5535/CS5536 GPIO support"
330 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
332 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
333 can be used for quite a number of things. The CS5535/6 is found on
334 AMD Geode and Lemote Yeeloong devices.
339 tristate "BT8XX GPIO abuser"
340 depends on PCI && VIDEO_BT848=n
342 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
343 as a cheap PCI GPIO card.
345 This chip can be found on Miro, Hauppauge and STB TV-cards.
347 The card needs to be physically altered for using it as a
348 GPIO card. For more information on how to build a GPIO card
349 from a BT8xx TV card, see the documentation file at
350 Documentation/bt8xxgpio.txt
355 bool "Intel Langwell/Penwell GPIO support"
356 depends on PCI && X86
358 Say Y here to support Intel Langwell/Penwell GPIO.
361 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
362 depends on PCI && X86
364 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
365 which is an IOH(Input/Output Hub) for x86 embedded processor.
366 This driver can access PCH GPIO device.
368 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
370 ML7223 IOH is for MP(Media Phone) use.
371 ML7223 is companion chip for Intel Atom E6xx series.
372 ML7223 is completely compatible for Intel EG20T PCH.
375 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
378 ML7213 is companion chip for Intel Atom E6xx series.
379 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
380 Hub) which is for IVI(In-Vehicle Infotainment) use.
381 This driver can access the IOH's GPIO device.
383 config GPIO_TIMBERDALE
384 bool "Support for timberdale GPIO IP"
385 depends on MFD_TIMBERDALE && HAS_IOMEM
387 Add support for the GPIO IP in the timberdale FPGA.
390 tristate "RDC R-321x GPIO support"
396 Support for the RDC R321x SoC GPIOs over southbridge
397 PCI configuration space.
399 comment "SPI GPIO expanders:"
402 tristate "Maxim MAX7301 GPIO expander"
403 depends on SPI_MASTER
406 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
409 tristate "Microchip MCP23Sxx I/O expander"
410 depends on SPI_MASTER
412 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
413 This provides a GPIO interface supporting inputs and outputs.
416 tristate "Freescale MC33880 high-side/low-side switch"
417 depends on SPI_MASTER
419 SPI driver for Freescale MC33880 high-side/low-side switch.
420 This provides GPIO interface supporting inputs and outputs.
423 tristate "74x164 serial-in/parallel-out 8-bits shift register"
424 depends on SPI_MASTER
426 Platform driver for 74x164 compatible serial-in/parallel-out
427 8-outputs shift registers. This driver can be used to provide access
428 to more gpio outputs.
430 comment "AC97 GPIO expanders:"
433 bool "Philips UCB1400 GPIO"
434 depends on UCB1400_CORE
436 This enables support for the Philips UCB1400 GPIO pins.
437 The UCB1400 is an AC97 audio codec.
439 To compile this driver as a module, choose M here: the
440 module will be called ucb1400_gpio.
442 comment "MODULbus GPIO expanders:"
445 tristate "Janz VMOD-TTL Digital IO Module"
446 depends on MFD_JANZ_CMODIO
448 This enables support for the Janz VMOD-TTL Digital IO module.
449 This driver provides support for driving the pins in output
450 mode only. Input mode is not supported.
453 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
454 depends on AB8500_CORE && BROKEN
456 Select this to enable the AB8500 IC GPIO driver
460 depends on MFD_TPS65910
462 Select this option to enable GPIO driver for the TPS65910