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
104 depends on PPC_MPC52xx
110 select GENERIC_IRQ_CHIP
116 select GENERIC_IRQ_CHIP
118 config GPIO_PLAT_SAMSUNG
120 depends on SAMSUNG_GPIOLIB_4BIT
124 depends on CPU_S5PC100
128 depends on CPU_S5PV210
131 bool "PrimeCell PL061 GPIO support"
134 Say yes here to support the PrimeCell PL061 GPIO device
137 bool "Xilinx GPIO support"
138 depends on PPC_OF || MICROBLAZE
140 Say yes here to support the Xilinx FPGA GPIO device
143 tristate "NEC VR4100 series General-purpose I/O Uint support"
144 depends on CPU_VR41XX
146 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
149 tristate "Intel SCH/TunnelCreek GPIO"
150 depends on PCI && X86
154 Say yes here to support GPIO interface on Intel Poulsbo SCH
155 or Intel Tunnel Creek processor.
156 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
157 powered by the core power rail and are turned off during sleep
158 modes (S3 and higher). The remaining four GPIOs are powered by
159 the Intel SCH suspend power supply. These GPIOs remain
160 active during S3. The suspend powered GPIOs can be used to wake the
161 system from the Suspend-to-RAM state.
162 The Intel Tunnel Creek processor has 5 GPIOs powered by the
163 core power rail and 9 from suspend power supply.
166 tristate "VIA VX855/VX875 GPIO"
167 depends on MFD_SUPPORT && PCI
171 Support access to the VX855/VX875 GPIO lines through the gpio library.
173 This driver provides common support for accessing the device,
174 additional drivers must be enabled in order to use the
175 functionality of the device.
177 comment "I2C GPIO expanders:"
180 tristate "Maxim MAX7300 GPIO expander"
184 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
187 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
190 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
191 Port Expanders. Each IO port on these chips has a fixed role of
192 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
193 Input and Output (designed by 'P'). The combinations are listed
196 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
197 max7322 (4I4O), max7323 (4P4O)
199 16 bits: max7324 (8I8O), max7325 (8P8O),
200 max7326 (4I12O), max7327 (4P12O)
202 Board setup code must specify the model to use, and the start
203 number for these GPIOs.
205 config GPIO_MAX732X_IRQ
206 bool "Interrupt controller support for MAX732x"
207 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
209 Say yes here to enable the max732x to be used as an interrupt
210 controller. It requires the driver to be built in the kernel.
213 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
216 Say yes here to provide access to several register-oriented
217 SMBus I/O expanders, made mostly by NXP or TI. Compatible
220 4 bits: pca9536, pca9537
222 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
225 16 bits: pca9535, pca9539, pca9555, tca6416
227 config GPIO_PCA953X_IRQ
228 bool "Interrupt controller support for PCA953x"
229 depends on GPIO_PCA953X=y
231 Say yes here to enable the pca953x to be used as an interrupt
232 controller. It requires the driver to be built in the kernel.
235 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
238 Say yes here to provide access to most "quasi-bidirectional" I2C
239 GPIO expanders used for additional digital outputs or inputs.
240 Most of these parts are from NXP, though TI is a second source for
241 some of them. Compatible models include:
243 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
244 pca9670, pca9672, pca9674, pca9674a,
247 16 bits: pcf8575, pcf8575c, pca8575,
248 pca9671, pca9673, pca9675
250 Your board setup code will need to declare the expanders in
251 use, and assign numbers to the GPIOs they expose. Those GPIOs
252 can then be used from drivers and other kernel code, just like
253 other GPIOs, but only accessible from task contexts.
255 This driver provides an in-kernel interface to those GPIOs using
256 platform-neutral GPIO calls.
259 bool "Semtech SX150x I2C GPIO expander"
263 Say yes here to provide support for Semtech SX150-series I2C
264 GPIO expanders. Compatible models include:
273 This enables support for the GPIOs found on the STMPE I/O
278 depends on MFD_TC3589X
280 This enables support for the GPIOs found on the TC3589X
284 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
285 depends on TWL4030_CORE
287 Say yes here to access the GPIO signals of various multi-function
288 power management chips from Texas Instruments.
291 tristate "WM831x GPIOs"
292 depends on MFD_WM831X
294 Say yes here to access the GPIO signals of WM831x power management
295 chips from Wolfson Microelectronics.
298 tristate "WM8350 GPIOs"
299 depends on MFD_WM8350
301 Say yes here to access the GPIO signals of WM8350 power management
302 chips from Wolfson Microelectronics.
305 tristate "WM8994 GPIOs"
306 depends on MFD_WM8994
308 Say yes here to access the GPIO signals of WM8994 audio hub
309 CODECs from Wolfson Microelectronics.
312 tristate "GPIO Support for ADP5520 PMIC"
313 depends on PMIC_ADP5520
315 This option enables support for on-chip GPIO found
316 on Analog Devices ADP5520 PMICs.
319 tristate "ADP5588 I2C GPIO expander"
322 This option enables support for 18 GPIOs found
323 on Analog Devices ADP5588 GPIO Expanders.
325 config GPIO_ADP5588_IRQ
326 bool "Interrupt controller support for ADP5588"
327 depends on GPIO_ADP5588=y
329 Say yes here to enable the adp5588 to be used as an interrupt
330 controller. It requires the driver to be built in the kernel.
332 comment "PCI GPIO expanders:"
335 tristate "AMD CS5535/CS5536 GPIO support"
336 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
338 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
339 can be used for quite a number of things. The CS5535/6 is found on
340 AMD Geode and Lemote Yeeloong devices.
345 tristate "BT8XX GPIO abuser"
346 depends on PCI && VIDEO_BT848=n
348 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
349 as a cheap PCI GPIO card.
351 This chip can be found on Miro, Hauppauge and STB TV-cards.
353 The card needs to be physically altered for using it as a
354 GPIO card. For more information on how to build a GPIO card
355 from a BT8xx TV card, see the documentation file at
356 Documentation/bt8xxgpio.txt
361 bool "Intel Langwell/Penwell GPIO support"
362 depends on PCI && X86
364 Say Y here to support Intel Langwell/Penwell GPIO.
367 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
368 depends on PCI && X86
370 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
371 which is an IOH(Input/Output Hub) for x86 embedded processor.
372 This driver can access PCH GPIO device.
374 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
376 ML7223 IOH is for MP(Media Phone) use.
377 ML7223 is companion chip for Intel Atom E6xx series.
378 ML7223 is completely compatible for Intel EG20T PCH.
381 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
384 ML7213 is companion chip for Intel Atom E6xx series.
385 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
386 Hub) which is for IVI(In-Vehicle Infotainment) use.
387 This driver can access the IOH's GPIO device.
389 config GPIO_TIMBERDALE
390 bool "Support for timberdale GPIO IP"
391 depends on MFD_TIMBERDALE && HAS_IOMEM
393 Add support for the GPIO IP in the timberdale FPGA.
396 tristate "RDC R-321x GPIO support"
402 Support for the RDC R321x SoC GPIOs over southbridge
403 PCI configuration space.
405 comment "SPI GPIO expanders:"
408 tristate "Maxim MAX7301 GPIO expander"
409 depends on SPI_MASTER
412 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
415 tristate "Microchip MCP23xxx I/O expander"
416 depends on SPI_MASTER || I2C
418 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
420 This provides a GPIO interface supporting inputs and outputs.
423 tristate "Freescale MC33880 high-side/low-side switch"
424 depends on SPI_MASTER
426 SPI driver for Freescale MC33880 high-side/low-side switch.
427 This provides GPIO interface supporting inputs and outputs.
430 tristate "74x164 serial-in/parallel-out 8-bits shift register"
431 depends on SPI_MASTER
433 Platform driver for 74x164 compatible serial-in/parallel-out
434 8-outputs shift registers. This driver can be used to provide access
435 to more gpio outputs.
437 comment "AC97 GPIO expanders:"
440 bool "Philips UCB1400 GPIO"
441 depends on UCB1400_CORE
443 This enables support for the Philips UCB1400 GPIO pins.
444 The UCB1400 is an AC97 audio codec.
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