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.
95 tristate "Emma Mobile GPIO"
98 Say yes here to support GPIO on Renesas Emma Mobile SoCs.
102 depends on ARCH_EP93XX
107 depends on PPC_MPC52xx
110 bool "MPC512x/MPC8xxx GPIO support"
111 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
112 FSL_SOC_BOOKE || PPC_86xx
114 Say Y here if you're going to use hardware that connects to the
115 MPC512x/831x/834x/837x/8572/8610 GPIOs.
118 tristate "Qualcomm MSM GPIO v1"
119 depends on GPIOLIB && ARCH_MSM
121 Say yes here to support the GPIO interface on ARM v6 based
122 Qualcomm MSM chips. Most of the pins on the MSM can be
123 selected for GPIO, and are controlled by this driver.
126 tristate "Qualcomm MSM GPIO v2"
127 depends on GPIOLIB && ARCH_MSM
129 Say yes here to support the GPIO interface on ARM v7 based
130 Qualcomm MSM chips. Most of the pins on the MSM can be
131 selected for GPIO, and are controlled by this driver.
137 select GENERIC_IRQ_CHIP
143 select GENERIC_IRQ_CHIP
146 bool "PrimeCell PL061 GPIO support"
148 select GENERIC_IRQ_CHIP
150 Say yes here to support the PrimeCell PL061 GPIO device
153 bool "PXA GPIO support"
154 depends on ARCH_PXA || ARCH_MMP
156 Say yes here to support the PXA GPIO device
159 bool "Xilinx GPIO support"
160 depends on PPC_OF || MICROBLAZE
162 Say yes here to support the Xilinx FPGA GPIO device
165 tristate "NEC VR4100 series General-purpose I/O Uint support"
166 depends on CPU_VR41XX
168 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
171 tristate "Intel SCH/TunnelCreek GPIO"
172 depends on PCI && X86
176 Say yes here to support GPIO interface on Intel Poulsbo SCH
177 or Intel Tunnel Creek processor.
178 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
179 powered by the core power rail and are turned off during sleep
180 modes (S3 and higher). The remaining four GPIOs are powered by
181 the Intel SCH suspend power supply. These GPIOs remain
182 active during S3. The suspend powered GPIOs can be used to wake the
183 system from the Suspend-to-RAM state.
184 The Intel Tunnel Creek processor has 5 GPIOs powered by the
185 core power rail and 9 from suspend power supply.
188 tristate "VIA VX855/VX875 GPIO"
193 Support access to the VX855/VX875 GPIO lines through the gpio library.
195 This driver provides common support for accessing the device,
196 additional drivers must be enabled in order to use the
197 functionality of the device.
200 bool "GE FPGA based GPIO"
203 Support for common GPIO functionality provided on some GE Single Board
206 This driver provides basic support (configure as input or output, read
207 and write pin state) for GPIO implemented in a number of GE single
210 comment "I2C GPIO expanders:"
213 tristate "Maxim MAX7300 GPIO expander"
217 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
220 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
223 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
224 Port Expanders. Each IO port on these chips has a fixed role of
225 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
226 Input and Output (designed by 'P'). The combinations are listed
229 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
230 max7322 (4I4O), max7323 (4P4O)
232 16 bits: max7324 (8I8O), max7325 (8P8O),
233 max7326 (4I12O), max7327 (4P12O)
235 Board setup code must specify the model to use, and the start
236 number for these GPIOs.
238 config GPIO_MAX732X_IRQ
239 bool "Interrupt controller support for MAX732x"
240 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
242 Say yes here to enable the max732x to be used as an interrupt
243 controller. It requires the driver to be built in the kernel.
245 config GPIO_MC9S08DZ60
246 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
247 depends on I2C && MACH_MX35_3DS
249 Select this to enable the MC9S08DZ60 GPIO driver
252 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
255 Say yes here to provide access to several register-oriented
256 SMBus I/O expanders, made mostly by NXP or TI. Compatible
259 4 bits: pca9536, pca9537
261 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
264 16 bits: pca9535, pca9539, pca9555, tca6416
266 config GPIO_PCA953X_IRQ
267 bool "Interrupt controller support for PCA953x"
268 depends on GPIO_PCA953X=y
270 Say yes here to enable the pca953x to be used as an interrupt
271 controller. It requires the driver to be built in the kernel.
274 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
277 Say yes here to provide access to most "quasi-bidirectional" I2C
278 GPIO expanders used for additional digital outputs or inputs.
279 Most of these parts are from NXP, though TI is a second source for
280 some of them. Compatible models include:
282 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
283 pca9670, pca9672, pca9674, pca9674a,
286 16 bits: pcf8575, pcf8575c, pca8575,
287 pca9671, pca9673, pca9675
289 Your board setup code will need to declare the expanders in
290 use, and assign numbers to the GPIOs they expose. Those GPIOs
291 can then be used from drivers and other kernel code, just like
292 other GPIOs, but only accessible from task contexts.
294 This driver provides an in-kernel interface to those GPIOs using
295 platform-neutral GPIO calls.
298 bool "Semtech SX150x I2C GPIO expander"
302 Say yes here to provide support for Semtech SX150-series I2C
303 GPIO expanders. Compatible models include:
312 This enables support for the GPIOs found on the STMPE I/O
317 depends on MFD_TC3589X
319 This enables support for the GPIOs found on the TC3589X
323 tristate "TI TPS65912 GPIO"
324 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
326 This driver supports TPS65912 gpio chip
329 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
330 depends on TWL4030_CORE
332 Say yes here to access the GPIO signals of various multi-function
333 power management chips from Texas Instruments.
336 tristate "WM831x GPIOs"
337 depends on MFD_WM831X
339 Say yes here to access the GPIO signals of WM831x power management
340 chips from Wolfson Microelectronics.
343 tristate "WM8350 GPIOs"
344 depends on MFD_WM8350
346 Say yes here to access the GPIO signals of WM8350 power management
347 chips from Wolfson Microelectronics.
350 tristate "WM8994 GPIOs"
351 depends on MFD_WM8994
353 Say yes here to access the GPIO signals of WM8994 audio hub
354 CODECs from Wolfson Microelectronics.
357 tristate "GPIO Support for ADP5520 PMIC"
358 depends on PMIC_ADP5520
360 This option enables support for on-chip GPIO found
361 on Analog Devices ADP5520 PMICs.
364 tristate "ADP5588 I2C GPIO expander"
367 This option enables support for 18 GPIOs found
368 on Analog Devices ADP5588 GPIO Expanders.
370 config GPIO_ADP5588_IRQ
371 bool "Interrupt controller support for ADP5588"
372 depends on GPIO_ADP5588=y
374 Say yes here to enable the adp5588 to be used as an interrupt
375 controller. It requires the driver to be built in the kernel.
377 comment "PCI GPIO expanders:"
380 tristate "AMD CS5535/CS5536 GPIO support"
381 depends on PCI && X86 && MFD_CS5535
383 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
384 can be used for quite a number of things. The CS5535/6 is found on
385 AMD Geode and Lemote Yeeloong devices.
390 tristate "BT8XX GPIO abuser"
391 depends on PCI && VIDEO_BT848=n
393 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
394 as a cheap PCI GPIO card.
396 This chip can be found on Miro, Hauppauge and STB TV-cards.
398 The card needs to be physically altered for using it as a
399 GPIO card. For more information on how to build a GPIO card
400 from a BT8xx TV card, see the documentation file at
401 Documentation/bt8xxgpio.txt
406 bool "Intel Langwell/Penwell GPIO support"
407 depends on PCI && X86
409 Say Y here to support Intel Langwell/Penwell GPIO.
412 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO"
413 depends on PCI && X86
414 select GENERIC_IRQ_CHIP
416 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
417 which is an IOH(Input/Output Hub) for x86 embedded processor.
418 This driver can access PCH GPIO device.
420 This driver also can be used for LAPIS Semiconductor IOH(Input/
421 Output Hub), ML7223 and ML7831.
422 ML7223 IOH is for MP(Media Phone) use.
423 ML7831 IOH is for general purpose use.
424 ML7223/ML7831 is companion chip for Intel Atom E6xx series.
425 ML7223/ML7831 is completely compatible for Intel EG20T PCH.
428 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
430 select GENERIC_IRQ_CHIP
432 ML7213 is companion chip for Intel Atom E6xx series.
433 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
434 Hub) which is for IVI(In-Vehicle Infotainment) use.
435 This driver can access the IOH's GPIO device.
437 config GPIO_SODAVILLE
438 bool "Intel Sodaville GPIO support"
439 depends on X86 && PCI && OF
441 select GENERIC_IRQ_CHIP
443 Say Y here to support Intel Sodaville GPIO.
445 config GPIO_TIMBERDALE
446 bool "Support for timberdale GPIO IP"
447 depends on MFD_TIMBERDALE && HAS_IOMEM
449 Add support for the GPIO IP in the timberdale FPGA.
452 tristate "RDC R-321x GPIO support"
457 Support for the RDC R321x SoC GPIOs over southbridge
458 PCI configuration space.
460 comment "SPI GPIO expanders:"
463 tristate "Maxim MAX7301 GPIO expander"
464 depends on SPI_MASTER
467 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
470 tristate "Microchip MCP23xxx I/O expander"
471 depends on SPI_MASTER || I2C
473 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
475 This provides a GPIO interface supporting inputs and outputs.
478 tristate "Freescale MC33880 high-side/low-side switch"
479 depends on SPI_MASTER
481 SPI driver for Freescale MC33880 high-side/low-side switch.
482 This provides GPIO interface supporting inputs and outputs.
485 tristate "74x164 serial-in/parallel-out 8-bits shift register"
486 depends on SPI_MASTER
488 Platform driver for 74x164 compatible serial-in/parallel-out
489 8-outputs shift registers. This driver can be used to provide access
490 to more gpio outputs.
492 comment "AC97 GPIO expanders:"
495 bool "Philips UCB1400 GPIO"
496 depends on UCB1400_CORE
498 This enables support for the Philips UCB1400 GPIO pins.
499 The UCB1400 is an AC97 audio codec.
501 comment "MODULbus GPIO expanders:"
504 tristate "Janz VMOD-TTL Digital IO Module"
505 depends on MFD_JANZ_CMODIO
507 This enables support for the Janz VMOD-TTL Digital IO module.
508 This driver provides support for driving the pins in output
509 mode only. Input mode is not supported.
512 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions"
513 depends on AB8500_CORE && BROKEN
515 Select this to enable the AB8500 IC GPIO driver
519 depends on MFD_TPS65910
521 Select this option to enable GPIO driver for the TPS65910