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 "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 bool "ST-Ericsson U300 COH 901 335/571 GPIO"
181 depends on GPIOLIB && ARCH_U300
183 Say yes here to support GPIO interface on ST-Ericsson U300.
184 The names of the two IP block variants supported are
185 COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
186 ports of 8 GPIO pins each.
189 tristate "VIA VX855/VX875 GPIO"
194 Support access to the VX855/VX875 GPIO lines through the gpio library.
196 This driver provides common support for accessing the device,
197 additional drivers must be enabled in order to use the
198 functionality of the device.
200 comment "I2C GPIO expanders:"
203 tristate "Maxim MAX7300 GPIO expander"
207 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
210 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
213 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
214 Port Expanders. Each IO port on these chips has a fixed role of
215 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
216 Input and Output (designed by 'P'). The combinations are listed
219 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
220 max7322 (4I4O), max7323 (4P4O)
222 16 bits: max7324 (8I8O), max7325 (8P8O),
223 max7326 (4I12O), max7327 (4P12O)
225 Board setup code must specify the model to use, and the start
226 number for these GPIOs.
228 config GPIO_MAX732X_IRQ
229 bool "Interrupt controller support for MAX732x"
230 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
232 Say yes here to enable the max732x to be used as an interrupt
233 controller. It requires the driver to be built in the kernel.
236 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
239 Say yes here to provide access to several register-oriented
240 SMBus I/O expanders, made mostly by NXP or TI. Compatible
243 4 bits: pca9536, pca9537
245 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
248 16 bits: pca9535, pca9539, pca9555, tca6416
250 config GPIO_PCA953X_IRQ
251 bool "Interrupt controller support for PCA953x"
252 depends on GPIO_PCA953X=y
254 Say yes here to enable the pca953x to be used as an interrupt
255 controller. It requires the driver to be built in the kernel.
258 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
261 Say yes here to provide access to most "quasi-bidirectional" I2C
262 GPIO expanders used for additional digital outputs or inputs.
263 Most of these parts are from NXP, though TI is a second source for
264 some of them. Compatible models include:
266 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
267 pca9670, pca9672, pca9674, pca9674a,
270 16 bits: pcf8575, pcf8575c, pca8575,
271 pca9671, pca9673, pca9675
273 Your board setup code will need to declare the expanders in
274 use, and assign numbers to the GPIOs they expose. Those GPIOs
275 can then be used from drivers and other kernel code, just like
276 other GPIOs, but only accessible from task contexts.
278 This driver provides an in-kernel interface to those GPIOs using
279 platform-neutral GPIO calls.
282 bool "Semtech SX150x I2C GPIO expander"
286 Say yes here to provide support for Semtech SX150-series I2C
287 GPIO expanders. Compatible models include:
296 This enables support for the GPIOs found on the STMPE I/O
301 depends on MFD_TC3589X
303 This enables support for the GPIOs found on the TC3589X
307 tristate "TI TPS65912 GPIO"
308 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
310 This driver supports TPS65912 gpio chip
313 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
314 depends on TWL4030_CORE
316 Say yes here to access the GPIO signals of various multi-function
317 power management chips from Texas Instruments.
320 tristate "WM831x GPIOs"
321 depends on MFD_WM831X
323 Say yes here to access the GPIO signals of WM831x power management
324 chips from Wolfson Microelectronics.
327 tristate "WM8350 GPIOs"
328 depends on MFD_WM8350
330 Say yes here to access the GPIO signals of WM8350 power management
331 chips from Wolfson Microelectronics.
334 tristate "WM8994 GPIOs"
335 depends on MFD_WM8994
337 Say yes here to access the GPIO signals of WM8994 audio hub
338 CODECs from Wolfson Microelectronics.
341 tristate "GPIO Support for ADP5520 PMIC"
342 depends on PMIC_ADP5520
344 This option enables support for on-chip GPIO found
345 on Analog Devices ADP5520 PMICs.
348 tristate "ADP5588 I2C GPIO expander"
351 This option enables support for 18 GPIOs found
352 on Analog Devices ADP5588 GPIO Expanders.
354 config GPIO_ADP5588_IRQ
355 bool "Interrupt controller support for ADP5588"
356 depends on GPIO_ADP5588=y
358 Say yes here to enable the adp5588 to be used as an interrupt
359 controller. It requires the driver to be built in the kernel.
361 comment "PCI GPIO expanders:"
364 tristate "AMD CS5535/CS5536 GPIO support"
365 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535
367 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
368 can be used for quite a number of things. The CS5535/6 is found on
369 AMD Geode and Lemote Yeeloong devices.
374 tristate "BT8XX GPIO abuser"
375 depends on PCI && VIDEO_BT848=n
377 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
378 as a cheap PCI GPIO card.
380 This chip can be found on Miro, Hauppauge and STB TV-cards.
382 The card needs to be physically altered for using it as a
383 GPIO card. For more information on how to build a GPIO card
384 from a BT8xx TV card, see the documentation file at
385 Documentation/bt8xxgpio.txt
390 bool "Intel Langwell/Penwell GPIO support"
391 depends on PCI && X86
393 Say Y here to support Intel Langwell/Penwell GPIO.
396 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO"
397 depends on PCI && X86
398 select GENERIC_IRQ_CHIP
400 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
401 which is an IOH(Input/Output Hub) for x86 embedded processor.
402 This driver can access PCH GPIO device.
404 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
406 ML7223 IOH is for MP(Media Phone) use.
407 ML7223 is companion chip for Intel Atom E6xx series.
408 ML7223 is completely compatible for Intel EG20T PCH.
411 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
413 select GENERIC_IRQ_CHIP
415 ML7213 is companion chip for Intel Atom E6xx series.
416 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
417 Hub) which is for IVI(In-Vehicle Infotainment) use.
418 This driver can access the IOH's GPIO device.
420 config GPIO_TIMBERDALE
421 bool "Support for timberdale GPIO IP"
422 depends on MFD_TIMBERDALE && HAS_IOMEM
424 Add support for the GPIO IP in the timberdale FPGA.
427 tristate "RDC R-321x GPIO support"
432 Support for the RDC R321x SoC GPIOs over southbridge
433 PCI configuration space.
435 comment "SPI GPIO expanders:"
438 tristate "Maxim MAX7301 GPIO expander"
439 depends on SPI_MASTER
442 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
445 tristate "Microchip MCP23xxx I/O expander"
446 depends on SPI_MASTER || I2C
448 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
450 This provides a GPIO interface supporting inputs and outputs.
453 tristate "Freescale MC33880 high-side/low-side switch"
454 depends on SPI_MASTER
456 SPI driver for Freescale MC33880 high-side/low-side switch.
457 This provides GPIO interface supporting inputs and outputs.
460 tristate "74x164 serial-in/parallel-out 8-bits shift register"
461 depends on SPI_MASTER
463 Platform driver for 74x164 compatible serial-in/parallel-out
464 8-outputs shift registers. This driver can be used to provide access
465 to more gpio outputs.
467 comment "AC97 GPIO expanders:"
470 bool "Philips UCB1400 GPIO"
471 depends on UCB1400_CORE
473 This enables support for the Philips UCB1400 GPIO pins.
474 The UCB1400 is an AC97 audio codec.
476 comment "MODULbus GPIO expanders:"
479 tristate "Janz VMOD-TTL Digital IO Module"
480 depends on MFD_JANZ_CMODIO
482 This enables support for the Janz VMOD-TTL Digital IO module.
483 This driver provides support for driving the pins in output
484 mode only. Input mode is not supported.
487 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
488 depends on AB8500_CORE && BROKEN
490 Select this to enable the AB8500 IC GPIO driver
494 depends on MFD_TPS65910
496 Select this option to enable GPIO driver for the TPS65910