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 && BROKEN
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"
141 select GENERIC_IRQ_CHIP
143 Say yes here to support the PrimeCell PL061 GPIO device
146 bool "PXA GPIO support"
147 depends on ARCH_PXA || ARCH_MMP
149 Say yes here to support the PXA GPIO device
152 bool "Xilinx GPIO support"
153 depends on PPC_OF || MICROBLAZE
155 Say yes here to support the Xilinx FPGA GPIO device
158 tristate "NEC VR4100 series General-purpose I/O Uint support"
159 depends on CPU_VR41XX
161 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
164 tristate "Intel SCH/TunnelCreek GPIO"
165 depends on PCI && X86
169 Say yes here to support GPIO interface on Intel Poulsbo SCH
170 or Intel Tunnel Creek processor.
171 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
172 powered by the core power rail and are turned off during sleep
173 modes (S3 and higher). The remaining four GPIOs are powered by
174 the Intel SCH suspend power supply. These GPIOs remain
175 active during S3. The suspend powered GPIOs can be used to wake the
176 system from the Suspend-to-RAM state.
177 The Intel Tunnel Creek processor has 5 GPIOs powered by the
178 core power rail and 9 from suspend power supply.
181 tristate "VIA VX855/VX875 GPIO"
186 Support access to the VX855/VX875 GPIO lines through the gpio library.
188 This driver provides common support for accessing the device,
189 additional drivers must be enabled in order to use the
190 functionality of the device.
192 comment "I2C GPIO expanders:"
195 tristate "Maxim MAX7300 GPIO expander"
199 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
202 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
205 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
206 Port Expanders. Each IO port on these chips has a fixed role of
207 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
208 Input and Output (designed by 'P'). The combinations are listed
211 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
212 max7322 (4I4O), max7323 (4P4O)
214 16 bits: max7324 (8I8O), max7325 (8P8O),
215 max7326 (4I12O), max7327 (4P12O)
217 Board setup code must specify the model to use, and the start
218 number for these GPIOs.
220 config GPIO_MAX732X_IRQ
221 bool "Interrupt controller support for MAX732x"
222 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
224 Say yes here to enable the max732x to be used as an interrupt
225 controller. It requires the driver to be built in the kernel.
228 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
231 Say yes here to provide access to several register-oriented
232 SMBus I/O expanders, made mostly by NXP or TI. Compatible
235 4 bits: pca9536, pca9537
237 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
240 16 bits: pca9535, pca9539, pca9555, tca6416
242 config GPIO_PCA953X_IRQ
243 bool "Interrupt controller support for PCA953x"
244 depends on GPIO_PCA953X=y
246 Say yes here to enable the pca953x to be used as an interrupt
247 controller. It requires the driver to be built in the kernel.
250 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
253 Say yes here to provide access to most "quasi-bidirectional" I2C
254 GPIO expanders used for additional digital outputs or inputs.
255 Most of these parts are from NXP, though TI is a second source for
256 some of them. Compatible models include:
258 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
259 pca9670, pca9672, pca9674, pca9674a,
262 16 bits: pcf8575, pcf8575c, pca8575,
263 pca9671, pca9673, pca9675
265 Your board setup code will need to declare the expanders in
266 use, and assign numbers to the GPIOs they expose. Those GPIOs
267 can then be used from drivers and other kernel code, just like
268 other GPIOs, but only accessible from task contexts.
270 This driver provides an in-kernel interface to those GPIOs using
271 platform-neutral GPIO calls.
274 bool "Semtech SX150x I2C GPIO expander"
278 Say yes here to provide support for Semtech SX150-series I2C
279 GPIO expanders. Compatible models include:
288 This enables support for the GPIOs found on the STMPE I/O
293 depends on MFD_TC3589X
295 This enables support for the GPIOs found on the TC3589X
299 tristate "TI TPS65912 GPIO"
300 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
302 This driver supports TPS65912 gpio chip
305 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
306 depends on TWL4030_CORE
308 Say yes here to access the GPIO signals of various multi-function
309 power management chips from Texas Instruments.
312 tristate "WM831x GPIOs"
313 depends on MFD_WM831X
315 Say yes here to access the GPIO signals of WM831x power management
316 chips from Wolfson Microelectronics.
319 tristate "WM8350 GPIOs"
320 depends on MFD_WM8350
322 Say yes here to access the GPIO signals of WM8350 power management
323 chips from Wolfson Microelectronics.
326 tristate "WM8994 GPIOs"
327 depends on MFD_WM8994
329 Say yes here to access the GPIO signals of WM8994 audio hub
330 CODECs from Wolfson Microelectronics.
333 tristate "GPIO Support for ADP5520 PMIC"
334 depends on PMIC_ADP5520
336 This option enables support for on-chip GPIO found
337 on Analog Devices ADP5520 PMICs.
340 tristate "ADP5588 I2C GPIO expander"
343 This option enables support for 18 GPIOs found
344 on Analog Devices ADP5588 GPIO Expanders.
346 config GPIO_ADP5588_IRQ
347 bool "Interrupt controller support for ADP5588"
348 depends on GPIO_ADP5588=y
350 Say yes here to enable the adp5588 to be used as an interrupt
351 controller. It requires the driver to be built in the kernel.
353 comment "PCI GPIO expanders:"
356 tristate "AMD CS5535/CS5536 GPIO support"
357 depends on PCI && X86 && MFD_CS5535
359 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
360 can be used for quite a number of things. The CS5535/6 is found on
361 AMD Geode and Lemote Yeeloong devices.
366 tristate "BT8XX GPIO abuser"
367 depends on PCI && VIDEO_BT848=n
369 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
370 as a cheap PCI GPIO card.
372 This chip can be found on Miro, Hauppauge and STB TV-cards.
374 The card needs to be physically altered for using it as a
375 GPIO card. For more information on how to build a GPIO card
376 from a BT8xx TV card, see the documentation file at
377 Documentation/bt8xxgpio.txt
382 bool "Intel Langwell/Penwell GPIO support"
383 depends on PCI && X86
385 Say Y here to support Intel Langwell/Penwell GPIO.
388 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
389 depends on PCI && X86
390 select GENERIC_IRQ_CHIP
392 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
393 which is an IOH(Input/Output Hub) for x86 embedded processor.
394 This driver can access PCH GPIO device.
396 This driver also can be used for LAPIS Semiconductor IOH(Input/
397 Output Hub), ML7223 and ML7831.
398 ML7223 IOH is for MP(Media Phone) use.
399 ML7831 IOH is for general purpose use.
400 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
401 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
404 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
406 select GENERIC_IRQ_CHIP
408 ML7213 is companion chip for Intel Atom E6xx series.
409 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
410 Hub) which is for IVI(In-Vehicle Infotainment) use.
411 This driver can access the IOH's GPIO device.
413 config GPIO_TIMBERDALE
414 bool "Support for timberdale GPIO IP"
415 depends on MFD_TIMBERDALE && HAS_IOMEM
417 Add support for the GPIO IP in the timberdale FPGA.
420 tristate "RDC R-321x GPIO support"
425 Support for the RDC R321x SoC GPIOs over southbridge
426 PCI configuration space.
428 comment "SPI GPIO expanders:"
431 tristate "Maxim MAX7301 GPIO expander"
432 depends on SPI_MASTER
435 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
438 tristate "Microchip MCP23xxx I/O expander"
439 depends on SPI_MASTER || I2C
441 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
443 This provides a GPIO interface supporting inputs and outputs.
446 tristate "Freescale MC33880 high-side/low-side switch"
447 depends on SPI_MASTER
449 SPI driver for Freescale MC33880 high-side/low-side switch.
450 This provides GPIO interface supporting inputs and outputs.
453 tristate "74x164 serial-in/parallel-out 8-bits shift register"
454 depends on SPI_MASTER
456 Platform driver for 74x164 compatible serial-in/parallel-out
457 8-outputs shift registers. This driver can be used to provide access
458 to more gpio outputs.
460 comment "AC97 GPIO expanders:"
463 bool "Philips UCB1400 GPIO"
464 depends on UCB1400_CORE
466 This enables support for the Philips UCB1400 GPIO pins.
467 The UCB1400 is an AC97 audio codec.
469 comment "MODULbus GPIO expanders:"
472 tristate "Janz VMOD-TTL Digital IO Module"
473 depends on MFD_JANZ_CMODIO
475 This enables support for the Janz VMOD-TTL Digital IO module.
476 This driver provides support for driving the pins in output
477 mode only. Input mode is not supported.
480 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
481 depends on AB8500_CORE && BROKEN
483 Select this to enable the AB8500 IC GPIO driver
487 depends on MFD_TPS65910
489 Select this option to enable GPIO driver for the TPS65910