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
74 comment "Memory mapped GPIO drivers:"
76 config GPIO_GENERIC_PLATFORM
77 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
80 Say yes here to support basic platform_device memory-mapped GPIO controllers.
83 tristate "IT8761E GPIO support"
85 Say yes here to support GPIO functionality of IT8761E super I/O chip.
89 depends on ARCH_EP93XX
94 depends on CPU_EXYNOS4210
100 select GENERIC_IRQ_CHIP
106 select GENERIC_IRQ_CHIP
108 config GPIO_PLAT_SAMSUNG
110 depends on SAMSUNG_GPIOLIB_4BIT
114 depends on CPU_S5PC100
118 depends on CPU_S5PV210
121 bool "PrimeCell PL061 GPIO support"
124 Say yes here to support the PrimeCell PL061 GPIO device
127 bool "Xilinx GPIO support"
128 depends on PPC_OF || MICROBLAZE
130 Say yes here to support the Xilinx FPGA GPIO device
133 tristate "NEC VR4100 series General-purpose I/O Uint support"
134 depends on CPU_VR41XX
136 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
139 tristate "Intel SCH/TunnelCreek GPIO"
140 depends on PCI && X86
144 Say yes here to support GPIO interface on Intel Poulsbo SCH
145 or Intel Tunnel Creek processor.
146 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
147 powered by the core power rail and are turned off during sleep
148 modes (S3 and higher). The remaining four GPIOs are powered by
149 the Intel SCH suspend power supply. These GPIOs remain
150 active during S3. The suspend powered GPIOs can be used to wake the
151 system from the Suspend-to-RAM state.
152 The Intel Tunnel Creek processor has 5 GPIOs powered by the
153 core power rail and 9 from suspend power supply.
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 config GPIO_PCA953X_IRQ
218 bool "Interrupt controller support for PCA953x"
219 depends on GPIO_PCA953X=y
221 Say yes here to enable the pca953x to be used as an interrupt
222 controller. It requires the driver to be built in the kernel.
225 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
228 Say yes here to provide access to most "quasi-bidirectional" I2C
229 GPIO expanders used for additional digital outputs or inputs.
230 Most of these parts are from NXP, though TI is a second source for
231 some of them. Compatible models include:
233 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
234 pca9670, pca9672, pca9674, pca9674a,
237 16 bits: pcf8575, pcf8575c, pca8575,
238 pca9671, pca9673, pca9675
240 Your board setup code will need to declare the expanders in
241 use, and assign numbers to the GPIOs they expose. Those GPIOs
242 can then be used from drivers and other kernel code, just like
243 other GPIOs, but only accessible from task contexts.
245 This driver provides an in-kernel interface to those GPIOs using
246 platform-neutral GPIO calls.
249 bool "Semtech SX150x I2C GPIO expander"
253 Say yes here to provide support for Semtech SX150-series I2C
254 GPIO expanders. Compatible models include:
263 This enables support for the GPIOs found on the STMPE I/O
268 depends on MFD_TC3589X
270 This enables support for the GPIOs found on the TC3589X
274 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
275 depends on TWL4030_CORE
277 Say yes here to access the GPIO signals of various multi-function
278 power management chips from Texas Instruments.
281 tristate "WM831x GPIOs"
282 depends on MFD_WM831X
284 Say yes here to access the GPIO signals of WM831x power management
285 chips from Wolfson Microelectronics.
288 tristate "WM8350 GPIOs"
289 depends on MFD_WM8350
291 Say yes here to access the GPIO signals of WM8350 power management
292 chips from Wolfson Microelectronics.
295 tristate "WM8994 GPIOs"
296 depends on MFD_WM8994
298 Say yes here to access the GPIO signals of WM8994 audio hub
299 CODECs from Wolfson Microelectronics.
302 tristate "GPIO Support for ADP5520 PMIC"
303 depends on PMIC_ADP5520
305 This option enables support for on-chip GPIO found
306 on Analog Devices ADP5520 PMICs.
309 tristate "ADP5588 I2C GPIO expander"
312 This option enables support for 18 GPIOs found
313 on Analog Devices ADP5588 GPIO Expanders.
315 config GPIO_ADP5588_IRQ
316 bool "Interrupt controller support for ADP5588"
317 depends on GPIO_ADP5588=y
319 Say yes here to enable the adp5588 to be used as an interrupt
320 controller. It requires the driver to be built in the kernel.
322 comment "PCI GPIO expanders:"
325 tristate "AMD CS5535/CS5536 GPIO support"
326 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
328 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
329 can be used for quite a number of things. The CS5535/6 is found on
330 AMD Geode and Lemote Yeeloong devices.
335 tristate "BT8XX GPIO abuser"
336 depends on PCI && VIDEO_BT848=n
338 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
339 as a cheap PCI GPIO card.
341 This chip can be found on Miro, Hauppauge and STB TV-cards.
343 The card needs to be physically altered for using it as a
344 GPIO card. For more information on how to build a GPIO card
345 from a BT8xx TV card, see the documentation file at
346 Documentation/bt8xxgpio.txt
351 bool "Intel Langwell/Penwell GPIO support"
352 depends on PCI && X86
354 Say Y here to support Intel Langwell/Penwell GPIO.
357 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
358 depends on PCI && X86
360 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
361 which is an IOH(Input/Output Hub) for x86 embedded processor.
362 This driver can access PCH GPIO device.
364 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
366 ML7223 IOH is for MP(Media Phone) use.
367 ML7223 is companion chip for Intel Atom E6xx series.
368 ML7223 is completely compatible for Intel EG20T PCH.
371 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
374 ML7213 is companion chip for Intel Atom E6xx series.
375 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
376 Hub) which is for IVI(In-Vehicle Infotainment) use.
377 This driver can access the IOH's GPIO device.
379 config GPIO_TIMBERDALE
380 bool "Support for timberdale GPIO IP"
381 depends on MFD_TIMBERDALE && HAS_IOMEM
383 Add support for the GPIO IP in the timberdale FPGA.
386 tristate "RDC R-321x GPIO support"
392 Support for the RDC R321x SoC GPIOs over southbridge
393 PCI configuration space.
395 comment "SPI GPIO expanders:"
398 tristate "Maxim MAX7301 GPIO expander"
399 depends on SPI_MASTER
402 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
405 tristate "Microchip MCP23Sxx I/O expander"
406 depends on SPI_MASTER
408 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
409 This provides a GPIO interface supporting inputs and outputs.
412 tristate "Freescale MC33880 high-side/low-side switch"
413 depends on SPI_MASTER
415 SPI driver for Freescale MC33880 high-side/low-side switch.
416 This provides GPIO interface supporting inputs and outputs.
419 tristate "74x164 serial-in/parallel-out 8-bits shift register"
420 depends on SPI_MASTER
422 Platform driver for 74x164 compatible serial-in/parallel-out
423 8-outputs shift registers. This driver can be used to provide access
424 to more gpio outputs.
426 comment "AC97 GPIO expanders:"
429 bool "Philips UCB1400 GPIO"
430 depends on UCB1400_CORE
432 This enables support for the Philips UCB1400 GPIO pins.
433 The UCB1400 is an AC97 audio codec.
435 comment "MODULbus GPIO expanders:"
438 tristate "Janz VMOD-TTL Digital IO Module"
439 depends on MFD_JANZ_CMODIO
441 This enables support for the Janz VMOD-TTL Digital IO module.
442 This driver provides support for driving the pins in output
443 mode only. Input mode is not supported.
446 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
447 depends on AB8500_CORE && BROKEN
449 Select this to enable the AB8500 IC GPIO driver
453 depends on MFD_TPS65910
455 Select this option to enable GPIO driver for the TPS65910