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"
90 depends on X86 # unconditional access to IO space.
92 Say yes here to support GPIO functionality of IT8761E super I/O chip.
96 depends on ARCH_EP93XX
101 depends on PPC_MPC52xx
104 bool "MPC512x/MPC8xxx GPIO support"
105 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
106 FSL_SOC_BOOKE || PPC_86xx
108 Say Y here if you're going to use hardware that connects to the
109 MPC512x/831x/834x/837x/8572/8610 GPIOs.
112 tristate "Qualcomm MSM GPIO v1"
113 depends on GPIOLIB && ARCH_MSM
115 Say yes here to support the GPIO interface on ARM v6 based
116 Qualcomm MSM chips. Most of the pins on the MSM can be
117 selected for GPIO, and are controlled by this driver.
120 tristate "Qualcomm MSM GPIO v2"
121 depends on GPIOLIB && ARCH_MSM
123 Say yes here to support the GPIO interface on ARM v7 based
124 Qualcomm MSM chips. Most of the pins on the MSM can be
125 selected for GPIO, and are controlled by this driver.
131 select GENERIC_IRQ_CHIP
137 select GENERIC_IRQ_CHIP
140 bool "PrimeCell PL061 GPIO support"
142 select GENERIC_IRQ_CHIP
144 Say yes here to support the PrimeCell PL061 GPIO device
147 bool "PXA GPIO support"
148 depends on ARCH_PXA || ARCH_MMP
150 Say yes here to support the PXA GPIO device
153 bool "Xilinx GPIO support"
154 depends on PPC_OF || MICROBLAZE
156 Say yes here to support the Xilinx FPGA GPIO device
159 tristate "NEC VR4100 series General-purpose I/O Uint support"
160 depends on CPU_VR41XX
162 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
165 tristate "Intel SCH/TunnelCreek GPIO"
166 depends on PCI && X86
170 Say yes here to support GPIO interface on Intel Poulsbo SCH
171 or Intel Tunnel Creek processor.
172 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
173 powered by the core power rail and are turned off during sleep
174 modes (S3 and higher). The remaining four GPIOs are powered by
175 the Intel SCH suspend power supply. These GPIOs remain
176 active during S3. The suspend powered GPIOs can be used to wake the
177 system from the Suspend-to-RAM state.
178 The Intel Tunnel Creek processor has 5 GPIOs powered by the
179 core power rail and 9 from suspend power supply.
182 tristate "VIA VX855/VX875 GPIO"
187 Support access to the VX855/VX875 GPIO lines through the gpio library.
189 This driver provides common support for accessing the device,
190 additional drivers must be enabled in order to use the
191 functionality of the device.
194 bool "GE FPGA based GPIO"
197 Support for common GPIO functionality provided on some GE Single Board
200 This driver provides basic support (configure as input or output, read
201 and write pin state) for GPIO implemented in a number of GE single
204 comment "I2C GPIO expanders:"
207 tristate "Maxim MAX7300 GPIO expander"
211 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
214 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
217 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
218 Port Expanders. Each IO port on these chips has a fixed role of
219 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
220 Input and Output (designed by 'P'). The combinations are listed
223 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
224 max7322 (4I4O), max7323 (4P4O)
226 16 bits: max7324 (8I8O), max7325 (8P8O),
227 max7326 (4I12O), max7327 (4P12O)
229 Board setup code must specify the model to use, and the start
230 number for these GPIOs.
232 config GPIO_MAX732X_IRQ
233 bool "Interrupt controller support for MAX732x"
234 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
236 Say yes here to enable the max732x to be used as an interrupt
237 controller. It requires the driver to be built in the kernel.
239 config GPIO_MC9S08DZ60
240 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
241 depends on I2C && MACH_MX35_3DS
243 Select this to enable the MC9S08DZ60 GPIO driver
246 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
249 Say yes here to provide access to several register-oriented
250 SMBus I/O expanders, made mostly by NXP or TI. Compatible
253 4 bits: pca9536, pca9537
255 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
258 16 bits: pca9535, pca9539, pca9555, tca6416
260 config GPIO_PCA953X_IRQ
261 bool "Interrupt controller support for PCA953x"
262 depends on GPIO_PCA953X=y
264 Say yes here to enable the pca953x to be used as an interrupt
265 controller. It requires the driver to be built in the kernel.
268 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
271 Say yes here to provide access to most "quasi-bidirectional" I2C
272 GPIO expanders used for additional digital outputs or inputs.
273 Most of these parts are from NXP, though TI is a second source for
274 some of them. Compatible models include:
276 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
277 pca9670, pca9672, pca9674, pca9674a,
280 16 bits: pcf8575, pcf8575c, pca8575,
281 pca9671, pca9673, pca9675
283 Your board setup code will need to declare the expanders in
284 use, and assign numbers to the GPIOs they expose. Those GPIOs
285 can then be used from drivers and other kernel code, just like
286 other GPIOs, but only accessible from task contexts.
288 This driver provides an in-kernel interface to those GPIOs using
289 platform-neutral GPIO calls.
292 bool "Semtech SX150x I2C GPIO expander"
296 Say yes here to provide support for Semtech SX150-series I2C
297 GPIO expanders. Compatible models include:
306 This enables support for the GPIOs found on the STMPE I/O
311 depends on MFD_TC3589X
313 This enables support for the GPIOs found on the TC3589X
317 tristate "TI TPS65912 GPIO"
318 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
320 This driver supports TPS65912 gpio chip
323 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
324 depends on TWL4030_CORE
326 Say yes here to access the GPIO signals of various multi-function
327 power management chips from Texas Instruments.
330 tristate "WM831x GPIOs"
331 depends on MFD_WM831X
333 Say yes here to access the GPIO signals of WM831x power management
334 chips from Wolfson Microelectronics.
337 tristate "WM8350 GPIOs"
338 depends on MFD_WM8350
340 Say yes here to access the GPIO signals of WM8350 power management
341 chips from Wolfson Microelectronics.
344 tristate "WM8994 GPIOs"
345 depends on MFD_WM8994
347 Say yes here to access the GPIO signals of WM8994 audio hub
348 CODECs from Wolfson Microelectronics.
351 tristate "GPIO Support for ADP5520 PMIC"
352 depends on PMIC_ADP5520
354 This option enables support for on-chip GPIO found
355 on Analog Devices ADP5520 PMICs.
358 tristate "ADP5588 I2C GPIO expander"
361 This option enables support for 18 GPIOs found
362 on Analog Devices ADP5588 GPIO Expanders.
364 config GPIO_ADP5588_IRQ
365 bool "Interrupt controller support for ADP5588"
366 depends on GPIO_ADP5588=y
368 Say yes here to enable the adp5588 to be used as an interrupt
369 controller. It requires the driver to be built in the kernel.
371 comment "PCI GPIO expanders:"
374 tristate "AMD CS5535/CS5536 GPIO support"
375 depends on PCI && X86 && MFD_CS5535
377 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
378 can be used for quite a number of things. The CS5535/6 is found on
379 AMD Geode and Lemote Yeeloong devices.
384 tristate "BT8XX GPIO abuser"
385 depends on PCI && VIDEO_BT848=n
387 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
388 as a cheap PCI GPIO card.
390 This chip can be found on Miro, Hauppauge and STB TV-cards.
392 The card needs to be physically altered for using it as a
393 GPIO card. For more information on how to build a GPIO card
394 from a BT8xx TV card, see the documentation file at
395 Documentation/bt8xxgpio.txt
400 bool "Intel Langwell/Penwell GPIO support"
401 depends on PCI && X86
403 Say Y here to support Intel Langwell/Penwell GPIO.
406 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
407 depends on PCI && X86
408 select GENERIC_IRQ_CHIP
410 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
411 which is an IOH(Input/Output Hub) for x86 embedded processor.
412 This driver can access PCH GPIO device.
414 This driver also can be used for LAPIS Semiconductor IOH(Input/
415 Output Hub), ML7223 and ML7831.
416 ML7223 IOH is for MP(Media Phone) use.
417 ML7831 IOH is for general purpose use.
418 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
419 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
422 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
424 select GENERIC_IRQ_CHIP
426 ML7213 is companion chip for Intel Atom E6xx series.
427 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
428 Hub) which is for IVI(In-Vehicle Infotainment) use.
429 This driver can access the IOH's GPIO device.
431 config GPIO_SODAVILLE
432 bool "Intel Sodaville GPIO support"
433 depends on X86 && PCI && OF
435 select GENERIC_IRQ_CHIP
437 Say Y here to support Intel Sodaville GPIO.
439 config GPIO_TIMBERDALE
440 bool "Support for timberdale GPIO IP"
441 depends on MFD_TIMBERDALE && HAS_IOMEM
443 Add support for the GPIO IP in the timberdale FPGA.
446 tristate "RDC R-321x GPIO support"
451 Support for the RDC R321x SoC GPIOs over southbridge
452 PCI configuration space.
454 comment "SPI GPIO expanders:"
457 tristate "Maxim MAX7301 GPIO expander"
458 depends on SPI_MASTER
461 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
464 tristate "Microchip MCP23xxx I/O expander"
465 depends on SPI_MASTER || I2C
467 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
469 This provides a GPIO interface supporting inputs and outputs.
472 tristate "Freescale MC33880 high-side/low-side switch"
473 depends on SPI_MASTER
475 SPI driver for Freescale MC33880 high-side/low-side switch.
476 This provides GPIO interface supporting inputs and outputs.
479 tristate "74x164 serial-in/parallel-out 8-bits shift register"
480 depends on SPI_MASTER
482 Platform driver for 74x164 compatible serial-in/parallel-out
483 8-outputs shift registers. This driver can be used to provide access
484 to more gpio outputs.
486 comment "AC97 GPIO expanders:"
489 bool "Philips UCB1400 GPIO"
490 depends on UCB1400_CORE
492 This enables support for the Philips UCB1400 GPIO pins.
493 The UCB1400 is an AC97 audio codec.
495 comment "MODULbus GPIO expanders:"
498 tristate "Janz VMOD-TTL Digital IO Module"
499 depends on MFD_JANZ_CMODIO
501 This enables support for the Janz VMOD-TTL Digital IO module.
502 This driver provides support for driving the pins in output
503 mode only. Input mode is not supported.
506 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
507 depends on AB8500_CORE && BROKEN
509 Select this to enable the AB8500 IC GPIO driver
513 depends on MFD_TPS65910
515 Select this option to enable GPIO driver for the TPS65910