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
93 depends on CPU_EXYNOS4210
104 config GPIO_PLAT_SAMSUNG
106 depends on SAMSUNG_GPIOLIB_4BIT
110 depends on CPU_S5PC100
114 depends on CPU_S5PV210
117 bool "PrimeCell PL061 GPIO support"
120 Say yes here to support the PrimeCell PL061 GPIO device
123 bool "Xilinx GPIO support"
124 depends on PPC_OF || MICROBLAZE
126 Say yes here to support the Xilinx FPGA GPIO device
129 tristate "NEC VR4100 series General-purpose I/O Uint support"
130 depends on CPU_VR41XX
132 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
135 tristate "Intel SCH/TunnelCreek GPIO"
136 depends on PCI && X86
140 Say yes here to support GPIO interface on Intel Poulsbo SCH
141 or Intel Tunnel Creek processor.
142 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
143 powered by the core power rail and are turned off during sleep
144 modes (S3 and higher). The remaining four GPIOs are powered by
145 the Intel SCH suspend power supply. These GPIOs remain
146 active during S3. The suspend powered GPIOs can be used to wake the
147 system from the Suspend-to-RAM state.
148 The Intel Tunnel Creek processor has 5 GPIOs powered by the
149 core power rail and 9 from suspend power supply.
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 config GPIO_PCA953X_IRQ
214 bool "Interrupt controller support for PCA953x"
215 depends on GPIO_PCA953X=y
217 Say yes here to enable the pca953x to be used as an interrupt
218 controller. It requires the driver to be built in the kernel.
221 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
224 Say yes here to provide access to most "quasi-bidirectional" I2C
225 GPIO expanders used for additional digital outputs or inputs.
226 Most of these parts are from NXP, though TI is a second source for
227 some of them. Compatible models include:
229 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
230 pca9670, pca9672, pca9674, pca9674a,
233 16 bits: pcf8575, pcf8575c, pca8575,
234 pca9671, pca9673, pca9675
236 Your board setup code will need to declare the expanders in
237 use, and assign numbers to the GPIOs they expose. Those GPIOs
238 can then be used from drivers and other kernel code, just like
239 other GPIOs, but only accessible from task contexts.
241 This driver provides an in-kernel interface to those GPIOs using
242 platform-neutral GPIO calls.
245 bool "Semtech SX150x I2C GPIO expander"
249 Say yes here to provide support for Semtech SX150-series I2C
250 GPIO expanders. Compatible models include:
259 This enables support for the GPIOs found on the STMPE I/O
264 depends on MFD_TC3589X
266 This enables support for the GPIOs found on the TC3589X
270 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
271 depends on TWL4030_CORE
273 Say yes here to access the GPIO signals of various multi-function
274 power management chips from Texas Instruments.
277 tristate "WM831x GPIOs"
278 depends on MFD_WM831X
280 Say yes here to access the GPIO signals of WM831x power management
281 chips from Wolfson Microelectronics.
284 tristate "WM8350 GPIOs"
285 depends on MFD_WM8350
287 Say yes here to access the GPIO signals of WM8350 power management
288 chips from Wolfson Microelectronics.
291 tristate "WM8994 GPIOs"
292 depends on MFD_WM8994
294 Say yes here to access the GPIO signals of WM8994 audio hub
295 CODECs from Wolfson Microelectronics.
298 tristate "GPIO Support for ADP5520 PMIC"
299 depends on PMIC_ADP5520
301 This option enables support for on-chip GPIO found
302 on Analog Devices ADP5520 PMICs.
305 tristate "ADP5588 I2C GPIO expander"
308 This option enables support for 18 GPIOs found
309 on Analog Devices ADP5588 GPIO Expanders.
311 config GPIO_ADP5588_IRQ
312 bool "Interrupt controller support for ADP5588"
313 depends on GPIO_ADP5588=y
315 Say yes here to enable the adp5588 to be used as an interrupt
316 controller. It requires the driver to be built in the kernel.
318 comment "PCI GPIO expanders:"
321 tristate "AMD CS5535/CS5536 GPIO support"
322 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
324 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
325 can be used for quite a number of things. The CS5535/6 is found on
326 AMD Geode and Lemote Yeeloong devices.
331 tristate "BT8XX GPIO abuser"
332 depends on PCI && VIDEO_BT848=n
334 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
335 as a cheap PCI GPIO card.
337 This chip can be found on Miro, Hauppauge and STB TV-cards.
339 The card needs to be physically altered for using it as a
340 GPIO card. For more information on how to build a GPIO card
341 from a BT8xx TV card, see the documentation file at
342 Documentation/bt8xxgpio.txt
347 bool "Intel Langwell/Penwell GPIO support"
348 depends on PCI && X86
350 Say Y here to support Intel Langwell/Penwell GPIO.
353 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
354 depends on PCI && X86
356 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
357 which is an IOH(Input/Output Hub) for x86 embedded processor.
358 This driver can access PCH GPIO device.
360 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
362 ML7223 IOH is for MP(Media Phone) use.
363 ML7223 is companion chip for Intel Atom E6xx series.
364 ML7223 is completely compatible for Intel EG20T PCH.
367 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
370 ML7213 is companion chip for Intel Atom E6xx series.
371 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
372 Hub) which is for IVI(In-Vehicle Infotainment) use.
373 This driver can access the IOH's GPIO device.
375 config GPIO_TIMBERDALE
376 bool "Support for timberdale GPIO IP"
377 depends on MFD_TIMBERDALE && HAS_IOMEM
379 Add support for the GPIO IP in the timberdale FPGA.
382 tristate "RDC R-321x GPIO support"
388 Support for the RDC R321x SoC GPIOs over southbridge
389 PCI configuration space.
391 comment "SPI GPIO expanders:"
394 tristate "Maxim MAX7301 GPIO expander"
395 depends on SPI_MASTER
398 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
401 tristate "Microchip MCP23Sxx I/O expander"
402 depends on SPI_MASTER
404 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
405 This provides a GPIO interface supporting inputs and outputs.
408 tristate "Freescale MC33880 high-side/low-side switch"
409 depends on SPI_MASTER
411 SPI driver for Freescale MC33880 high-side/low-side switch.
412 This provides GPIO interface supporting inputs and outputs.
415 tristate "74x164 serial-in/parallel-out 8-bits shift register"
416 depends on SPI_MASTER
418 Platform driver for 74x164 compatible serial-in/parallel-out
419 8-outputs shift registers. This driver can be used to provide access
420 to more gpio outputs.
422 comment "AC97 GPIO expanders:"
425 bool "Philips UCB1400 GPIO"
426 depends on UCB1400_CORE
428 This enables support for the Philips UCB1400 GPIO pins.
429 The UCB1400 is an AC97 audio codec.
431 comment "MODULbus GPIO expanders:"
434 tristate "Janz VMOD-TTL Digital IO Module"
435 depends on MFD_JANZ_CMODIO
437 This enables support for the Janz VMOD-TTL Digital IO module.
438 This driver provides support for driving the pins in output
439 mode only. Input mode is not supported.
442 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
443 depends on AB8500_CORE && BROKEN
445 Select this to enable the AB8500 IC GPIO driver
449 depends on MFD_TPS65910
451 Select this option to enable GPIO driver for the TPS65910