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
99 select GENERIC_IRQ_CHIP
105 config GPIO_PLAT_SAMSUNG
107 depends on SAMSUNG_GPIOLIB_4BIT
111 depends on CPU_S5PC100
115 depends on CPU_S5PV210
118 bool "PrimeCell PL061 GPIO support"
121 Say yes here to support the PrimeCell PL061 GPIO device
124 bool "Xilinx GPIO support"
125 depends on PPC_OF || MICROBLAZE
127 Say yes here to support the Xilinx FPGA GPIO device
130 tristate "NEC VR4100 series General-purpose I/O Uint support"
131 depends on CPU_VR41XX
133 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
136 tristate "Intel SCH/TunnelCreek GPIO"
137 depends on PCI && X86
141 Say yes here to support GPIO interface on Intel Poulsbo SCH
142 or Intel Tunnel Creek processor.
143 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
144 powered by the core power rail and are turned off during sleep
145 modes (S3 and higher). The remaining four GPIOs are powered by
146 the Intel SCH suspend power supply. These GPIOs remain
147 active during S3. The suspend powered GPIOs can be used to wake the
148 system from the Suspend-to-RAM state.
149 The Intel Tunnel Creek processor has 5 GPIOs powered by the
150 core power rail and 9 from suspend power supply.
153 tristate "VIA VX855/VX875 GPIO"
154 depends on MFD_SUPPORT && PCI
158 Support access to the VX855/VX875 GPIO lines through the gpio library.
160 This driver provides common support for accessing the device,
161 additional drivers must be enabled in order to use the
162 functionality of the device.
164 comment "I2C GPIO expanders:"
167 tristate "Maxim MAX7300 GPIO expander"
171 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
174 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
177 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
178 Port Expanders. Each IO port on these chips has a fixed role of
179 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
180 Input and Output (designed by 'P'). The combinations are listed
183 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
184 max7322 (4I4O), max7323 (4P4O)
186 16 bits: max7324 (8I8O), max7325 (8P8O),
187 max7326 (4I12O), max7327 (4P12O)
189 Board setup code must specify the model to use, and the start
190 number for these GPIOs.
192 config GPIO_MAX732X_IRQ
193 bool "Interrupt controller support for MAX732x"
194 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
196 Say yes here to enable the max732x to be used as an interrupt
197 controller. It requires the driver to be built in the kernel.
200 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
203 Say yes here to provide access to several register-oriented
204 SMBus I/O expanders, made mostly by NXP or TI. Compatible
207 4 bits: pca9536, pca9537
209 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
212 16 bits: pca9535, pca9539, pca9555, tca6416
214 config GPIO_PCA953X_IRQ
215 bool "Interrupt controller support for PCA953x"
216 depends on GPIO_PCA953X=y
218 Say yes here to enable the pca953x to be used as an interrupt
219 controller. It requires the driver to be built in the kernel.
222 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
225 Say yes here to provide access to most "quasi-bidirectional" I2C
226 GPIO expanders used for additional digital outputs or inputs.
227 Most of these parts are from NXP, though TI is a second source for
228 some of them. Compatible models include:
230 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
231 pca9670, pca9672, pca9674, pca9674a,
234 16 bits: pcf8575, pcf8575c, pca8575,
235 pca9671, pca9673, pca9675
237 Your board setup code will need to declare the expanders in
238 use, and assign numbers to the GPIOs they expose. Those GPIOs
239 can then be used from drivers and other kernel code, just like
240 other GPIOs, but only accessible from task contexts.
242 This driver provides an in-kernel interface to those GPIOs using
243 platform-neutral GPIO calls.
246 bool "Semtech SX150x I2C GPIO expander"
250 Say yes here to provide support for Semtech SX150-series I2C
251 GPIO expanders. Compatible models include:
260 This enables support for the GPIOs found on the STMPE I/O
265 depends on MFD_TC3589X
267 This enables support for the GPIOs found on the TC3589X
271 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
272 depends on TWL4030_CORE
274 Say yes here to access the GPIO signals of various multi-function
275 power management chips from Texas Instruments.
278 tristate "WM831x GPIOs"
279 depends on MFD_WM831X
281 Say yes here to access the GPIO signals of WM831x power management
282 chips from Wolfson Microelectronics.
285 tristate "WM8350 GPIOs"
286 depends on MFD_WM8350
288 Say yes here to access the GPIO signals of WM8350 power management
289 chips from Wolfson Microelectronics.
292 tristate "WM8994 GPIOs"
293 depends on MFD_WM8994
295 Say yes here to access the GPIO signals of WM8994 audio hub
296 CODECs from Wolfson Microelectronics.
299 tristate "GPIO Support for ADP5520 PMIC"
300 depends on PMIC_ADP5520
302 This option enables support for on-chip GPIO found
303 on Analog Devices ADP5520 PMICs.
306 tristate "ADP5588 I2C GPIO expander"
309 This option enables support for 18 GPIOs found
310 on Analog Devices ADP5588 GPIO Expanders.
312 config GPIO_ADP5588_IRQ
313 bool "Interrupt controller support for ADP5588"
314 depends on GPIO_ADP5588=y
316 Say yes here to enable the adp5588 to be used as an interrupt
317 controller. It requires the driver to be built in the kernel.
319 comment "PCI GPIO expanders:"
322 tristate "AMD CS5535/CS5536 GPIO support"
323 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
325 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
326 can be used for quite a number of things. The CS5535/6 is found on
327 AMD Geode and Lemote Yeeloong devices.
332 tristate "BT8XX GPIO abuser"
333 depends on PCI && VIDEO_BT848=n
335 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
336 as a cheap PCI GPIO card.
338 This chip can be found on Miro, Hauppauge and STB TV-cards.
340 The card needs to be physically altered for using it as a
341 GPIO card. For more information on how to build a GPIO card
342 from a BT8xx TV card, see the documentation file at
343 Documentation/bt8xxgpio.txt
348 bool "Intel Langwell/Penwell GPIO support"
349 depends on PCI && X86
351 Say Y here to support Intel Langwell/Penwell GPIO.
354 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
355 depends on PCI && X86
357 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
358 which is an IOH(Input/Output Hub) for x86 embedded processor.
359 This driver can access PCH GPIO device.
361 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
363 ML7223 IOH is for MP(Media Phone) use.
364 ML7223 is companion chip for Intel Atom E6xx series.
365 ML7223 is completely compatible for Intel EG20T PCH.
368 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
371 ML7213 is companion chip for Intel Atom E6xx series.
372 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
373 Hub) which is for IVI(In-Vehicle Infotainment) use.
374 This driver can access the IOH's GPIO device.
376 config GPIO_TIMBERDALE
377 bool "Support for timberdale GPIO IP"
378 depends on MFD_TIMBERDALE && HAS_IOMEM
380 Add support for the GPIO IP in the timberdale FPGA.
383 tristate "RDC R-321x GPIO support"
389 Support for the RDC R321x SoC GPIOs over southbridge
390 PCI configuration space.
392 comment "SPI GPIO expanders:"
395 tristate "Maxim MAX7301 GPIO expander"
396 depends on SPI_MASTER
399 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
402 tristate "Microchip MCP23Sxx I/O expander"
403 depends on SPI_MASTER
405 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
406 This provides a GPIO interface supporting inputs and outputs.
409 tristate "Freescale MC33880 high-side/low-side switch"
410 depends on SPI_MASTER
412 SPI driver for Freescale MC33880 high-side/low-side switch.
413 This provides GPIO interface supporting inputs and outputs.
416 tristate "74x164 serial-in/parallel-out 8-bits shift register"
417 depends on SPI_MASTER
419 Platform driver for 74x164 compatible serial-in/parallel-out
420 8-outputs shift registers. This driver can be used to provide access
421 to more gpio outputs.
423 comment "AC97 GPIO expanders:"
426 bool "Philips UCB1400 GPIO"
427 depends on UCB1400_CORE
429 This enables support for the Philips UCB1400 GPIO pins.
430 The UCB1400 is an AC97 audio codec.
432 comment "MODULbus GPIO expanders:"
435 tristate "Janz VMOD-TTL Digital IO Module"
436 depends on MFD_JANZ_CMODIO
438 This enables support for the Janz VMOD-TTL Digital IO module.
439 This driver provides support for driving the pins in output
440 mode only. Input mode is not supported.
443 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
444 depends on AB8500_CORE && BROKEN
446 Select this to enable the AB8500 IC GPIO driver
450 depends on MFD_TPS65910
452 Select this option to enable GPIO driver for the TPS65910