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 bool "MPC512x/MPC8xxx GPIO support"
104 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
105 FSL_SOC_BOOKE || PPC_86xx
107 Say Y here if you're going to use hardware that connects to the
108 MPC512x/831x/834x/837x/8572/8610 GPIOs.
111 tristate "Qualcomm MSM GPIO v1"
112 depends on GPIOLIB && ARCH_MSM
114 Say yes here to support the GPIO interface on ARM v6 based
115 Qualcomm MSM chips. Most of the pins on the MSM can be
116 selected for GPIO, and are controlled by this driver.
119 tristate "Qualcomm MSM GPIO v2"
120 depends on GPIOLIB && ARCH_MSM
122 Say yes here to support the GPIO interface on ARM v7 based
123 Qualcomm MSM chips. Most of the pins on the MSM can be
124 selected for GPIO, and are controlled by this driver.
130 select GENERIC_IRQ_CHIP
136 select GENERIC_IRQ_CHIP
139 bool "PrimeCell PL061 GPIO support"
142 Say yes here to support the PrimeCell PL061 GPIO device
145 bool "Xilinx GPIO support"
146 depends on PPC_OF || MICROBLAZE
148 Say yes here to support the Xilinx FPGA GPIO device
151 tristate "NEC VR4100 series General-purpose I/O Uint support"
152 depends on CPU_VR41XX
154 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
157 tristate "Intel SCH/TunnelCreek GPIO"
158 depends on PCI && X86
162 Say yes here to support GPIO interface on Intel Poulsbo SCH
163 or Intel Tunnel Creek processor.
164 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
165 powered by the core power rail and are turned off during sleep
166 modes (S3 and higher). The remaining four GPIOs are powered by
167 the Intel SCH suspend power supply. These GPIOs remain
168 active during S3. The suspend powered GPIOs can be used to wake the
169 system from the Suspend-to-RAM state.
170 The Intel Tunnel Creek processor has 5 GPIOs powered by the
171 core power rail and 9 from suspend power supply.
174 bool "ST-Ericsson U300 COH 901 335/571 GPIO"
175 depends on GPIOLIB && ARCH_U300
177 Say yes here to support GPIO interface on ST-Ericsson U300.
178 The names of the two IP block variants supported are
179 COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
180 ports of 8 GPIO pins each.
183 tristate "VIA VX855/VX875 GPIO"
188 Support access to the VX855/VX875 GPIO lines through the gpio library.
190 This driver provides common support for accessing the device,
191 additional drivers must be enabled in order to use the
192 functionality of the device.
194 comment "I2C GPIO expanders:"
197 tristate "Maxim MAX7300 GPIO expander"
201 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
204 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
207 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
208 Port Expanders. Each IO port on these chips has a fixed role of
209 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
210 Input and Output (designed by 'P'). The combinations are listed
213 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
214 max7322 (4I4O), max7323 (4P4O)
216 16 bits: max7324 (8I8O), max7325 (8P8O),
217 max7326 (4I12O), max7327 (4P12O)
219 Board setup code must specify the model to use, and the start
220 number for these GPIOs.
222 config GPIO_MAX732X_IRQ
223 bool "Interrupt controller support for MAX732x"
224 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
226 Say yes here to enable the max732x to be used as an interrupt
227 controller. It requires the driver to be built in the kernel.
230 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
233 Say yes here to provide access to several register-oriented
234 SMBus I/O expanders, made mostly by NXP or TI. Compatible
237 4 bits: pca9536, pca9537
239 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
242 16 bits: pca9535, pca9539, pca9555, tca6416
244 config GPIO_PCA953X_IRQ
245 bool "Interrupt controller support for PCA953x"
246 depends on GPIO_PCA953X=y
248 Say yes here to enable the pca953x to be used as an interrupt
249 controller. It requires the driver to be built in the kernel.
252 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
255 Say yes here to provide access to most "quasi-bidirectional" I2C
256 GPIO expanders used for additional digital outputs or inputs.
257 Most of these parts are from NXP, though TI is a second source for
258 some of them. Compatible models include:
260 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
261 pca9670, pca9672, pca9674, pca9674a,
264 16 bits: pcf8575, pcf8575c, pca8575,
265 pca9671, pca9673, pca9675
267 Your board setup code will need to declare the expanders in
268 use, and assign numbers to the GPIOs they expose. Those GPIOs
269 can then be used from drivers and other kernel code, just like
270 other GPIOs, but only accessible from task contexts.
272 This driver provides an in-kernel interface to those GPIOs using
273 platform-neutral GPIO calls.
276 bool "Semtech SX150x I2C GPIO expander"
280 Say yes here to provide support for Semtech SX150-series I2C
281 GPIO expanders. Compatible models include:
290 This enables support for the GPIOs found on the STMPE I/O
295 depends on MFD_TC3589X
297 This enables support for the GPIOs found on the TC3589X
301 tristate "TI TPS65912 GPIO"
302 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
304 This driver supports TPS65912 gpio chip
307 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
308 depends on TWL4030_CORE
310 Say yes here to access the GPIO signals of various multi-function
311 power management chips from Texas Instruments.
314 tristate "WM831x GPIOs"
315 depends on MFD_WM831X
317 Say yes here to access the GPIO signals of WM831x power management
318 chips from Wolfson Microelectronics.
321 tristate "WM8350 GPIOs"
322 depends on MFD_WM8350
324 Say yes here to access the GPIO signals of WM8350 power management
325 chips from Wolfson Microelectronics.
328 tristate "WM8994 GPIOs"
329 depends on MFD_WM8994
331 Say yes here to access the GPIO signals of WM8994 audio hub
332 CODECs from Wolfson Microelectronics.
335 tristate "GPIO Support for ADP5520 PMIC"
336 depends on PMIC_ADP5520
338 This option enables support for on-chip GPIO found
339 on Analog Devices ADP5520 PMICs.
342 tristate "ADP5588 I2C GPIO expander"
345 This option enables support for 18 GPIOs found
346 on Analog Devices ADP5588 GPIO Expanders.
348 config GPIO_ADP5588_IRQ
349 bool "Interrupt controller support for ADP5588"
350 depends on GPIO_ADP5588=y
352 Say yes here to enable the adp5588 to be used as an interrupt
353 controller. It requires the driver to be built in the kernel.
355 comment "PCI GPIO expanders:"
358 tristate "AMD CS5535/CS5536 GPIO support"
359 depends on PCI && X86 && MFD_CS5535
361 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
362 can be used for quite a number of things. The CS5535/6 is found on
363 AMD Geode and Lemote Yeeloong devices.
368 tristate "BT8XX GPIO abuser"
369 depends on PCI && VIDEO_BT848=n
371 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
372 as a cheap PCI GPIO card.
374 This chip can be found on Miro, Hauppauge and STB TV-cards.
376 The card needs to be physically altered for using it as a
377 GPIO card. For more information on how to build a GPIO card
378 from a BT8xx TV card, see the documentation file at
379 Documentation/bt8xxgpio.txt
384 bool "Intel Langwell/Penwell GPIO support"
385 depends on PCI && X86
387 Say Y here to support Intel Langwell/Penwell GPIO.
390 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
391 depends on PCI && X86
392 select GENERIC_IRQ_CHIP
394 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
395 which is an IOH(Input/Output Hub) for x86 embedded processor.
396 This driver can access PCH GPIO device.
398 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
400 ML7223 IOH is for MP(Media Phone) use.
401 ML7223 is companion chip for Intel Atom E6xx series.
402 ML7223 is completely compatible for Intel EG20T PCH.
405 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
407 select GENERIC_IRQ_CHIP
409 ML7213 is companion chip for Intel Atom E6xx series.
410 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
411 Hub) which is for IVI(In-Vehicle Infotainment) use.
412 This driver can access the IOH's GPIO device.
414 config GPIO_TIMBERDALE
415 bool "Support for timberdale GPIO IP"
416 depends on MFD_TIMBERDALE && HAS_IOMEM
418 Add support for the GPIO IP in the timberdale FPGA.
421 tristate "RDC R-321x GPIO support"
426 Support for the RDC R321x SoC GPIOs over southbridge
427 PCI configuration space.
429 comment "SPI GPIO expanders:"
432 tristate "Maxim MAX7301 GPIO expander"
433 depends on SPI_MASTER
436 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
439 tristate "Microchip MCP23xxx I/O expander"
440 depends on SPI_MASTER || I2C
442 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
444 This provides a GPIO interface supporting inputs and outputs.
447 tristate "Freescale MC33880 high-side/low-side switch"
448 depends on SPI_MASTER
450 SPI driver for Freescale MC33880 high-side/low-side switch.
451 This provides GPIO interface supporting inputs and outputs.
454 tristate "74x164 serial-in/parallel-out 8-bits shift register"
455 depends on SPI_MASTER
457 Platform driver for 74x164 compatible serial-in/parallel-out
458 8-outputs shift registers. This driver can be used to provide access
459 to more gpio outputs.
461 comment "AC97 GPIO expanders:"
464 bool "Philips UCB1400 GPIO"
465 depends on UCB1400_CORE
467 This enables support for the Philips UCB1400 GPIO pins.
468 The UCB1400 is an AC97 audio codec.
470 comment "MODULbus GPIO expanders:"
473 tristate "Janz VMOD-TTL Digital IO Module"
474 depends on MFD_JANZ_CMODIO
476 This enables support for the Janz VMOD-TTL Digital IO module.
477 This driver provides support for driving the pins in output
478 mode only. Input mode is not supported.
481 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
482 depends on AB8500_CORE && BROKEN
484 Select this to enable the AB8500 IC GPIO driver
488 depends on MFD_TPS65910
490 Select this option to enable GPIO driver for the TPS65910