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"
142 Say yes here to support the PrimeCell PL061 GPIO device
145 bool "PXA GPIO support"
146 depends on ARCH_PXA || ARCH_MMP
148 Say yes here to support the PXA GPIO device
151 bool "Xilinx GPIO support"
152 depends on PPC_OF || MICROBLAZE
154 Say yes here to support the Xilinx FPGA GPIO device
157 tristate "NEC VR4100 series General-purpose I/O Uint support"
158 depends on CPU_VR41XX
160 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
163 tristate "Intel SCH/TunnelCreek GPIO"
164 depends on PCI && X86
168 Say yes here to support GPIO interface on Intel Poulsbo SCH
169 or Intel Tunnel Creek processor.
170 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
171 powered by the core power rail and are turned off during sleep
172 modes (S3 and higher). The remaining four GPIOs are powered by
173 the Intel SCH suspend power supply. These GPIOs remain
174 active during S3. The suspend powered GPIOs can be used to wake the
175 system from the Suspend-to-RAM state.
176 The Intel Tunnel Creek processor has 5 GPIOs powered by the
177 core power rail and 9 from suspend power supply.
180 tristate "VIA VX855/VX875 GPIO"
185 Support access to the VX855/VX875 GPIO lines through the gpio library.
187 This driver provides common support for accessing the device,
188 additional drivers must be enabled in order to use the
189 functionality of the device.
191 comment "I2C GPIO expanders:"
194 tristate "Maxim MAX7300 GPIO expander"
198 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
201 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
204 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
205 Port Expanders. Each IO port on these chips has a fixed role of
206 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
207 Input and Output (designed by 'P'). The combinations are listed
210 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
211 max7322 (4I4O), max7323 (4P4O)
213 16 bits: max7324 (8I8O), max7325 (8P8O),
214 max7326 (4I12O), max7327 (4P12O)
216 Board setup code must specify the model to use, and the start
217 number for these GPIOs.
219 config GPIO_MAX732X_IRQ
220 bool "Interrupt controller support for MAX732x"
221 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
223 Say yes here to enable the max732x to be used as an interrupt
224 controller. It requires the driver to be built in the kernel.
227 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
230 Say yes here to provide access to several register-oriented
231 SMBus I/O expanders, made mostly by NXP or TI. Compatible
234 4 bits: pca9536, pca9537
236 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
239 16 bits: pca9535, pca9539, pca9555, tca6416
241 config GPIO_PCA953X_IRQ
242 bool "Interrupt controller support for PCA953x"
243 depends on GPIO_PCA953X=y
245 Say yes here to enable the pca953x to be used as an interrupt
246 controller. It requires the driver to be built in the kernel.
249 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
252 Say yes here to provide access to most "quasi-bidirectional" I2C
253 GPIO expanders used for additional digital outputs or inputs.
254 Most of these parts are from NXP, though TI is a second source for
255 some of them. Compatible models include:
257 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
258 pca9670, pca9672, pca9674, pca9674a,
261 16 bits: pcf8575, pcf8575c, pca8575,
262 pca9671, pca9673, pca9675
264 Your board setup code will need to declare the expanders in
265 use, and assign numbers to the GPIOs they expose. Those GPIOs
266 can then be used from drivers and other kernel code, just like
267 other GPIOs, but only accessible from task contexts.
269 This driver provides an in-kernel interface to those GPIOs using
270 platform-neutral GPIO calls.
273 bool "Semtech SX150x I2C GPIO expander"
277 Say yes here to provide support for Semtech SX150-series I2C
278 GPIO expanders. Compatible models include:
287 This enables support for the GPIOs found on the STMPE I/O
292 depends on MFD_TC3589X
294 This enables support for the GPIOs found on the TC3589X
298 tristate "TI TPS65912 GPIO"
299 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
301 This driver supports TPS65912 gpio chip
304 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
305 depends on TWL4030_CORE
307 Say yes here to access the GPIO signals of various multi-function
308 power management chips from Texas Instruments.
311 tristate "WM831x GPIOs"
312 depends on MFD_WM831X
314 Say yes here to access the GPIO signals of WM831x power management
315 chips from Wolfson Microelectronics.
318 tristate "WM8350 GPIOs"
319 depends on MFD_WM8350
321 Say yes here to access the GPIO signals of WM8350 power management
322 chips from Wolfson Microelectronics.
325 tristate "WM8994 GPIOs"
326 depends on MFD_WM8994
328 Say yes here to access the GPIO signals of WM8994 audio hub
329 CODECs from Wolfson Microelectronics.
332 tristate "GPIO Support for ADP5520 PMIC"
333 depends on PMIC_ADP5520
335 This option enables support for on-chip GPIO found
336 on Analog Devices ADP5520 PMICs.
339 tristate "ADP5588 I2C GPIO expander"
342 This option enables support for 18 GPIOs found
343 on Analog Devices ADP5588 GPIO Expanders.
345 config GPIO_ADP5588_IRQ
346 bool "Interrupt controller support for ADP5588"
347 depends on GPIO_ADP5588=y
349 Say yes here to enable the adp5588 to be used as an interrupt
350 controller. It requires the driver to be built in the kernel.
352 comment "PCI GPIO expanders:"
355 tristate "AMD CS5535/CS5536 GPIO support"
356 depends on PCI && X86 && MFD_CS5535
358 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
359 can be used for quite a number of things. The CS5535/6 is found on
360 AMD Geode and Lemote Yeeloong devices.
365 tristate "BT8XX GPIO abuser"
366 depends on PCI && VIDEO_BT848=n
368 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
369 as a cheap PCI GPIO card.
371 This chip can be found on Miro, Hauppauge and STB TV-cards.
373 The card needs to be physically altered for using it as a
374 GPIO card. For more information on how to build a GPIO card
375 from a BT8xx TV card, see the documentation file at
376 Documentation/bt8xxgpio.txt
381 bool "Intel Langwell/Penwell GPIO support"
382 depends on PCI && X86
384 Say Y here to support Intel Langwell/Penwell GPIO.
387 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
388 depends on PCI && X86
389 select GENERIC_IRQ_CHIP
391 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
392 which is an IOH(Input/Output Hub) for x86 embedded processor.
393 This driver can access PCH GPIO device.
395 This driver also can be used for LAPIS Semiconductor IOH(Input/
396 Output Hub), ML7223 and ML7831.
397 ML7223 IOH is for MP(Media Phone) use.
398 ML7831 IOH is for general purpose use.
399 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
400 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
403 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
405 select GENERIC_IRQ_CHIP
407 ML7213 is companion chip for Intel Atom E6xx series.
408 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
409 Hub) which is for IVI(In-Vehicle Infotainment) use.
410 This driver can access the IOH's GPIO device.
412 config GPIO_TIMBERDALE
413 bool "Support for timberdale GPIO IP"
414 depends on MFD_TIMBERDALE && HAS_IOMEM
416 Add support for the GPIO IP in the timberdale FPGA.
419 tristate "RDC R-321x GPIO support"
424 Support for the RDC R321x SoC GPIOs over southbridge
425 PCI configuration space.
427 comment "SPI GPIO expanders:"
430 tristate "Maxim MAX7301 GPIO expander"
431 depends on SPI_MASTER
434 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
437 tristate "Microchip MCP23xxx I/O expander"
438 depends on SPI_MASTER || I2C
440 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
442 This provides a GPIO interface supporting inputs and outputs.
445 tristate "Freescale MC33880 high-side/low-side switch"
446 depends on SPI_MASTER
448 SPI driver for Freescale MC33880 high-side/low-side switch.
449 This provides GPIO interface supporting inputs and outputs.
452 tristate "74x164 serial-in/parallel-out 8-bits shift register"
453 depends on SPI_MASTER
455 Platform driver for 74x164 compatible serial-in/parallel-out
456 8-outputs shift registers. This driver can be used to provide access
457 to more gpio outputs.
459 comment "AC97 GPIO expanders:"
462 bool "Philips UCB1400 GPIO"
463 depends on UCB1400_CORE
465 This enables support for the Philips UCB1400 GPIO pins.
466 The UCB1400 is an AC97 audio codec.
468 comment "MODULbus GPIO expanders:"
471 tristate "Janz VMOD-TTL Digital IO Module"
472 depends on MFD_JANZ_CMODIO
474 This enables support for the Janz VMOD-TTL Digital IO module.
475 This driver provides support for driving the pins in output
476 mode only. Input mode is not supported.
479 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
480 depends on AB8500_CORE && BROKEN
482 Select this to enable the AB8500 IC GPIO driver
486 depends on MFD_TPS65910
488 Select this option to enable GPIO driver for the TPS65910