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
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"
91 Say yes here to support GPIO functionality of IT8761E super I/O chip.
95 depends on ARCH_EP93XX
100 depends on CPU_EXYNOS4210
106 select GENERIC_IRQ_CHIP
112 select GENERIC_IRQ_CHIP
114 config GPIO_PLAT_SAMSUNG
116 depends on SAMSUNG_GPIOLIB_4BIT
120 depends on CPU_S5PC100
124 depends on CPU_S5PV210
127 bool "PrimeCell PL061 GPIO support"
130 Say yes here to support the PrimeCell PL061 GPIO device
133 bool "Xilinx GPIO support"
134 depends on PPC_OF || MICROBLAZE
136 Say yes here to support the Xilinx FPGA GPIO device
139 tristate "NEC VR4100 series General-purpose I/O Uint support"
140 depends on CPU_VR41XX
142 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
145 tristate "Intel SCH/TunnelCreek GPIO"
146 depends on PCI && X86
150 Say yes here to support GPIO interface on Intel Poulsbo SCH
151 or Intel Tunnel Creek processor.
152 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
153 powered by the core power rail and are turned off during sleep
154 modes (S3 and higher). The remaining four GPIOs are powered by
155 the Intel SCH suspend power supply. These GPIOs remain
156 active during S3. The suspend powered GPIOs can be used to wake the
157 system from the Suspend-to-RAM state.
158 The Intel Tunnel Creek processor has 5 GPIOs powered by the
159 core power rail and 9 from suspend power supply.
162 tristate "VIA VX855/VX875 GPIO"
163 depends on MFD_SUPPORT && PCI
167 Support access to the VX855/VX875 GPIO lines through the gpio library.
169 This driver provides common support for accessing the device,
170 additional drivers must be enabled in order to use the
171 functionality of the device.
173 comment "I2C GPIO expanders:"
176 tristate "Maxim MAX7300 GPIO expander"
180 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
183 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
186 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
187 Port Expanders. Each IO port on these chips has a fixed role of
188 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
189 Input and Output (designed by 'P'). The combinations are listed
192 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
193 max7322 (4I4O), max7323 (4P4O)
195 16 bits: max7324 (8I8O), max7325 (8P8O),
196 max7326 (4I12O), max7327 (4P12O)
198 Board setup code must specify the model to use, and the start
199 number for these GPIOs.
201 config GPIO_MAX732X_IRQ
202 bool "Interrupt controller support for MAX732x"
203 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
205 Say yes here to enable the max732x to be used as an interrupt
206 controller. It requires the driver to be built in the kernel.
209 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
212 Say yes here to provide access to several register-oriented
213 SMBus I/O expanders, made mostly by NXP or TI. Compatible
216 4 bits: pca9536, pca9537
218 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
221 16 bits: pca9535, pca9539, pca9555, tca6416
223 config GPIO_PCA953X_IRQ
224 bool "Interrupt controller support for PCA953x"
225 depends on GPIO_PCA953X=y
227 Say yes here to enable the pca953x to be used as an interrupt
228 controller. It requires the driver to be built in the kernel.
231 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
234 Say yes here to provide access to most "quasi-bidirectional" I2C
235 GPIO expanders used for additional digital outputs or inputs.
236 Most of these parts are from NXP, though TI is a second source for
237 some of them. Compatible models include:
239 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
240 pca9670, pca9672, pca9674, pca9674a,
243 16 bits: pcf8575, pcf8575c, pca8575,
244 pca9671, pca9673, pca9675
246 Your board setup code will need to declare the expanders in
247 use, and assign numbers to the GPIOs they expose. Those GPIOs
248 can then be used from drivers and other kernel code, just like
249 other GPIOs, but only accessible from task contexts.
251 This driver provides an in-kernel interface to those GPIOs using
252 platform-neutral GPIO calls.
255 bool "Semtech SX150x I2C GPIO expander"
259 Say yes here to provide support for Semtech SX150-series I2C
260 GPIO expanders. Compatible models include:
269 This enables support for the GPIOs found on the STMPE I/O
274 depends on MFD_TC3589X
276 This enables support for the GPIOs found on the TC3589X
280 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
281 depends on TWL4030_CORE
283 Say yes here to access the GPIO signals of various multi-function
284 power management chips from Texas Instruments.
287 tristate "WM831x GPIOs"
288 depends on MFD_WM831X
290 Say yes here to access the GPIO signals of WM831x power management
291 chips from Wolfson Microelectronics.
294 tristate "WM8350 GPIOs"
295 depends on MFD_WM8350
297 Say yes here to access the GPIO signals of WM8350 power management
298 chips from Wolfson Microelectronics.
301 tristate "WM8994 GPIOs"
302 depends on MFD_WM8994
304 Say yes here to access the GPIO signals of WM8994 audio hub
305 CODECs from Wolfson Microelectronics.
308 tristate "GPIO Support for ADP5520 PMIC"
309 depends on PMIC_ADP5520
311 This option enables support for on-chip GPIO found
312 on Analog Devices ADP5520 PMICs.
315 tristate "ADP5588 I2C GPIO expander"
318 This option enables support for 18 GPIOs found
319 on Analog Devices ADP5588 GPIO Expanders.
321 config GPIO_ADP5588_IRQ
322 bool "Interrupt controller support for ADP5588"
323 depends on GPIO_ADP5588=y
325 Say yes here to enable the adp5588 to be used as an interrupt
326 controller. It requires the driver to be built in the kernel.
328 comment "PCI GPIO expanders:"
331 tristate "AMD CS5535/CS5536 GPIO support"
332 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
334 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
335 can be used for quite a number of things. The CS5535/6 is found on
336 AMD Geode and Lemote Yeeloong devices.
341 tristate "BT8XX GPIO abuser"
342 depends on PCI && VIDEO_BT848=n
344 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
345 as a cheap PCI GPIO card.
347 This chip can be found on Miro, Hauppauge and STB TV-cards.
349 The card needs to be physically altered for using it as a
350 GPIO card. For more information on how to build a GPIO card
351 from a BT8xx TV card, see the documentation file at
352 Documentation/bt8xxgpio.txt
357 bool "Intel Langwell/Penwell GPIO support"
358 depends on PCI && X86
360 Say Y here to support Intel Langwell/Penwell GPIO.
363 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
364 depends on PCI && X86
366 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
367 which is an IOH(Input/Output Hub) for x86 embedded processor.
368 This driver can access PCH GPIO device.
370 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
372 ML7223 IOH is for MP(Media Phone) use.
373 ML7223 is companion chip for Intel Atom E6xx series.
374 ML7223 is completely compatible for Intel EG20T PCH.
377 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
380 ML7213 is companion chip for Intel Atom E6xx series.
381 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
382 Hub) which is for IVI(In-Vehicle Infotainment) use.
383 This driver can access the IOH's GPIO device.
385 config GPIO_TIMBERDALE
386 bool "Support for timberdale GPIO IP"
387 depends on MFD_TIMBERDALE && HAS_IOMEM
389 Add support for the GPIO IP in the timberdale FPGA.
392 tristate "RDC R-321x GPIO support"
398 Support for the RDC R321x SoC GPIOs over southbridge
399 PCI configuration space.
401 comment "SPI GPIO expanders:"
404 tristate "Maxim MAX7301 GPIO expander"
405 depends on SPI_MASTER
408 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
411 tristate "Microchip MCP23Sxx I/O expander"
412 depends on SPI_MASTER
414 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
415 This provides a GPIO interface supporting inputs and outputs.
418 tristate "Freescale MC33880 high-side/low-side switch"
419 depends on SPI_MASTER
421 SPI driver for Freescale MC33880 high-side/low-side switch.
422 This provides GPIO interface supporting inputs and outputs.
425 tristate "74x164 serial-in/parallel-out 8-bits shift register"
426 depends on SPI_MASTER
428 Platform driver for 74x164 compatible serial-in/parallel-out
429 8-outputs shift registers. This driver can be used to provide access
430 to more gpio outputs.
432 comment "AC97 GPIO expanders:"
435 bool "Philips UCB1400 GPIO"
436 depends on UCB1400_CORE
438 This enables support for the Philips UCB1400 GPIO pins.
439 The UCB1400 is an AC97 audio codec.
441 comment "MODULbus GPIO expanders:"
444 tristate "Janz VMOD-TTL Digital IO Module"
445 depends on MFD_JANZ_CMODIO
447 This enables support for the Janz VMOD-TTL Digital IO module.
448 This driver provides support for driving the pins in output
449 mode only. Input mode is not supported.
452 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
453 depends on AB8500_CORE && BROKEN
455 Select this to enable the AB8500 IC GPIO driver
459 depends on MFD_TPS65910
461 Select this option to enable GPIO driver for the TPS65910