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 PPC_MPC52xx
103 tristate "Qualcomm MSM GPIO v1"
104 depends on GPIOLIB && ARCH_MSM
106 Say yes here to support the GPIO interface on ARM v6 based
107 Qualcomm MSM chips. Most of the pins on the MSM can be
108 selected for GPIO, and are controlled by this driver.
111 tristate "Qualcomm MSM GPIO v2"
112 depends on GPIOLIB && ARCH_MSM
114 Say yes here to support the GPIO interface on ARM v7 based
115 Qualcomm MSM chips. Most of the pins on the MSM can be
116 selected for GPIO, and are controlled by this driver.
122 select GENERIC_IRQ_CHIP
128 select GENERIC_IRQ_CHIP
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 bool "ST-Ericsson U300 COH 901 335/571 GPIO"
167 depends on GPIOLIB && ARCH_U300
169 Say yes here to support GPIO interface on ST-Ericsson U300.
170 The names of the two IP block variants supported are
171 COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
172 ports of 8 GPIO pins each.
175 tristate "VIA VX855/VX875 GPIO"
180 Support access to the VX855/VX875 GPIO lines through the gpio library.
182 This driver provides common support for accessing the device,
183 additional drivers must be enabled in order to use the
184 functionality of the device.
186 comment "I2C GPIO expanders:"
189 tristate "Maxim MAX7300 GPIO expander"
193 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
196 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
199 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
200 Port Expanders. Each IO port on these chips has a fixed role of
201 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
202 Input and Output (designed by 'P'). The combinations are listed
205 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
206 max7322 (4I4O), max7323 (4P4O)
208 16 bits: max7324 (8I8O), max7325 (8P8O),
209 max7326 (4I12O), max7327 (4P12O)
211 Board setup code must specify the model to use, and the start
212 number for these GPIOs.
214 config GPIO_MAX732X_IRQ
215 bool "Interrupt controller support for MAX732x"
216 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
218 Say yes here to enable the max732x to be used as an interrupt
219 controller. It requires the driver to be built in the kernel.
222 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
225 Say yes here to provide access to several register-oriented
226 SMBus I/O expanders, made mostly by NXP or TI. Compatible
229 4 bits: pca9536, pca9537
231 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
234 16 bits: pca9535, pca9539, pca9555, tca6416
236 config GPIO_PCA953X_IRQ
237 bool "Interrupt controller support for PCA953x"
238 depends on GPIO_PCA953X=y
240 Say yes here to enable the pca953x to be used as an interrupt
241 controller. It requires the driver to be built in the kernel.
244 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
247 Say yes here to provide access to most "quasi-bidirectional" I2C
248 GPIO expanders used for additional digital outputs or inputs.
249 Most of these parts are from NXP, though TI is a second source for
250 some of them. Compatible models include:
252 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
253 pca9670, pca9672, pca9674, pca9674a,
256 16 bits: pcf8575, pcf8575c, pca8575,
257 pca9671, pca9673, pca9675
259 Your board setup code will need to declare the expanders in
260 use, and assign numbers to the GPIOs they expose. Those GPIOs
261 can then be used from drivers and other kernel code, just like
262 other GPIOs, but only accessible from task contexts.
264 This driver provides an in-kernel interface to those GPIOs using
265 platform-neutral GPIO calls.
268 bool "Semtech SX150x I2C GPIO expander"
272 Say yes here to provide support for Semtech SX150-series I2C
273 GPIO expanders. Compatible models include:
282 This enables support for the GPIOs found on the STMPE I/O
287 depends on MFD_TC3589X
289 This enables support for the GPIOs found on the TC3589X
293 tristate "TI TPS65912 GPIO"
294 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
296 This driver supports TPS65912 gpio chip
299 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
300 depends on TWL4030_CORE
302 Say yes here to access the GPIO signals of various multi-function
303 power management chips from Texas Instruments.
306 tristate "WM831x GPIOs"
307 depends on MFD_WM831X
309 Say yes here to access the GPIO signals of WM831x power management
310 chips from Wolfson Microelectronics.
313 tristate "WM8350 GPIOs"
314 depends on MFD_WM8350
316 Say yes here to access the GPIO signals of WM8350 power management
317 chips from Wolfson Microelectronics.
320 tristate "WM8994 GPIOs"
321 depends on MFD_WM8994
323 Say yes here to access the GPIO signals of WM8994 audio hub
324 CODECs from Wolfson Microelectronics.
327 tristate "GPIO Support for ADP5520 PMIC"
328 depends on PMIC_ADP5520
330 This option enables support for on-chip GPIO found
331 on Analog Devices ADP5520 PMICs.
334 tristate "ADP5588 I2C GPIO expander"
337 This option enables support for 18 GPIOs found
338 on Analog Devices ADP5588 GPIO Expanders.
340 config GPIO_ADP5588_IRQ
341 bool "Interrupt controller support for ADP5588"
342 depends on GPIO_ADP5588=y
344 Say yes here to enable the adp5588 to be used as an interrupt
345 controller. It requires the driver to be built in the kernel.
347 comment "PCI GPIO expanders:"
350 tristate "AMD CS5535/CS5536 GPIO support"
351 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
353 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
354 can be used for quite a number of things. The CS5535/6 is found on
355 AMD Geode and Lemote Yeeloong devices.
360 tristate "BT8XX GPIO abuser"
361 depends on PCI && VIDEO_BT848=n
363 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
364 as a cheap PCI GPIO card.
366 This chip can be found on Miro, Hauppauge and STB TV-cards.
368 The card needs to be physically altered for using it as a
369 GPIO card. For more information on how to build a GPIO card
370 from a BT8xx TV card, see the documentation file at
371 Documentation/bt8xxgpio.txt
376 bool "Intel Langwell/Penwell GPIO support"
377 depends on PCI && X86
379 Say Y here to support Intel Langwell/Penwell GPIO.
382 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
383 depends on PCI && X86
384 select GENERIC_IRQ_CHIP
386 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
387 which is an IOH(Input/Output Hub) for x86 embedded processor.
388 This driver can access PCH GPIO device.
390 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
392 ML7223 IOH is for MP(Media Phone) use.
393 ML7223 is companion chip for Intel Atom E6xx series.
394 ML7223 is completely compatible for Intel EG20T PCH.
397 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
399 select GENERIC_IRQ_CHIP
401 ML7213 is companion chip for Intel Atom E6xx series.
402 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
403 Hub) which is for IVI(In-Vehicle Infotainment) use.
404 This driver can access the IOH's GPIO device.
406 config GPIO_TIMBERDALE
407 bool "Support for timberdale GPIO IP"
408 depends on MFD_TIMBERDALE && HAS_IOMEM
410 Add support for the GPIO IP in the timberdale FPGA.
413 tristate "RDC R-321x GPIO support"
418 Support for the RDC R321x SoC GPIOs over southbridge
419 PCI configuration space.
421 comment "SPI GPIO expanders:"
424 tristate "Maxim MAX7301 GPIO expander"
425 depends on SPI_MASTER
428 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
431 tristate "Microchip MCP23xxx I/O expander"
432 depends on SPI_MASTER || I2C
434 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
436 This provides a GPIO interface supporting inputs and outputs.
439 tristate "Freescale MC33880 high-side/low-side switch"
440 depends on SPI_MASTER
442 SPI driver for Freescale MC33880 high-side/low-side switch.
443 This provides GPIO interface supporting inputs and outputs.
446 tristate "74x164 serial-in/parallel-out 8-bits shift register"
447 depends on SPI_MASTER
449 Platform driver for 74x164 compatible serial-in/parallel-out
450 8-outputs shift registers. This driver can be used to provide access
451 to more gpio outputs.
453 comment "AC97 GPIO expanders:"
456 bool "Philips UCB1400 GPIO"
457 depends on UCB1400_CORE
459 This enables support for the Philips UCB1400 GPIO pins.
460 The UCB1400 is an AC97 audio codec.
462 comment "MODULbus GPIO expanders:"
465 tristate "Janz VMOD-TTL Digital IO Module"
466 depends on MFD_JANZ_CMODIO
468 This enables support for the Janz VMOD-TTL Digital IO module.
469 This driver provides support for driving the pins in output
470 mode only. Input mode is not supported.
473 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
474 depends on AB8500_CORE && BROKEN
476 Select this to enable the AB8500 IC GPIO driver
480 depends on MFD_TPS65910
482 Select this option to enable GPIO driver for the TPS65910