2 # platform-neutral GPIO infrastructure and expanders
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 expansion card 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.
66 # put expanders in the right section, in alphabetical order
71 comment "Memory mapped GPIO expanders:"
73 config GPIO_BASIC_MMIO
74 tristate "Basic memory-mapped GPIO controllers support"
76 Say yes here to support basic memory-mapped GPIO controllers.
79 tristate "IT8761E GPIO support"
82 Say yes here to support GPIO functionality of IT8761E super I/O chip.
85 bool "PrimeCell PL061 GPIO support"
88 Say yes here to support the PrimeCell PL061 GPIO device
91 bool "Xilinx GPIO support"
92 depends on PPC_OF || MICROBLAZE
94 Say yes here to support the Xilinx FPGA GPIO device
97 tristate "NEC VR4100 series General-purpose I/O Uint support"
100 Say yes here to support the NEC VR4100 series General-purpose I/O Uint
103 tristate "Intel SCH/TunnelCreek GPIO"
104 depends on GPIOLIB && PCI && X86
108 Say yes here to support GPIO interface on Intel Poulsbo SCH
109 or Intel Tunnel Creek processor.
110 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
111 powered by the core power rail and are turned off during sleep
112 modes (S3 and higher). The remaining four GPIOs are powered by
113 the Intel SCH suspend power supply. These GPIOs remain
114 active during S3. The suspend powered GPIOs can be used to wake the
115 system from the Suspend-to-RAM state.
116 The Intel Tunnel Creek processor has 5 GPIOs powered by the
117 core power rail and 9 from suspend power supply.
119 This driver can also be built as a module. If so, the module
120 will be called sch-gpio.
123 tristate "VIA VX855/VX875 GPIO"
124 depends on GPIOLIB && MFD_SUPPORT && PCI
128 Support access to the VX855/VX875 GPIO lines through the gpio library.
130 This driver provides common support for accessing the device,
131 additional drivers must be enabled in order to use the
132 functionality of the device.
134 comment "I2C GPIO expanders:"
137 tristate "Maxim MAX7300 GPIO expander"
141 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
144 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
147 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
148 Port Expanders. Each IO port on these chips has a fixed role of
149 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
150 Input and Output (designed by 'P'). The combinations are listed
153 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
154 max7322 (4I4O), max7323 (4P4O)
156 16 bits: max7324 (8I8O), max7325 (8P8O),
157 max7326 (4I12O), max7327 (4P12O)
159 Board setup code must specify the model to use, and the start
160 number for these GPIOs.
162 config GPIO_MAX732X_IRQ
163 bool "Interrupt controller support for MAX732x"
164 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
166 Say yes here to enable the max732x to be used as an interrupt
167 controller. It requires the driver to be built in the kernel.
170 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
173 Say yes here to provide access to several register-oriented
174 SMBus I/O expanders, made mostly by NXP or TI. Compatible
177 4 bits: pca9536, pca9537
179 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
182 16 bits: pca9535, pca9539, pca9555, tca6416
184 This driver can also be built as a module. If so, the module
185 will be called pca953x.
187 config GPIO_PCA953X_IRQ
188 bool "Interrupt controller support for PCA953x"
189 depends on GPIO_PCA953X=y
191 Say yes here to enable the pca953x to be used as an interrupt
192 controller. It requires the driver to be built in the kernel.
195 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
198 Say yes here to provide access to most "quasi-bidirectional" I2C
199 GPIO expanders used for additional digital outputs or inputs.
200 Most of these parts are from NXP, though TI is a second source for
201 some of them. Compatible models include:
203 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
204 pca9670, pca9672, pca9674, pca9674a,
207 16 bits: pcf8575, pcf8575c, pca8575,
208 pca9671, pca9673, pca9675
210 Your board setup code will need to declare the expanders in
211 use, and assign numbers to the GPIOs they expose. Those GPIOs
212 can then be used from drivers and other kernel code, just like
213 other GPIOs, but only accessible from task contexts.
215 This driver provides an in-kernel interface to those GPIOs using
216 platform-neutral GPIO calls.
219 bool "Semtech SX150x I2C GPIO expander"
223 Say yes here to provide support for Semtech SX150-series I2C
224 GPIO expanders. Compatible models include:
233 This enables support for the GPIOs found on the STMPE I/O
238 depends on MFD_TC3589X
240 This enables support for the GPIOs found on the TC3589X
244 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
245 depends on TWL4030_CORE
247 Say yes here to access the GPIO signals of various multi-function
248 power management chips from Texas Instruments.
251 tristate "WM831x GPIOs"
252 depends on MFD_WM831X
254 Say yes here to access the GPIO signals of WM831x power management
255 chips from Wolfson Microelectronics.
258 tristate "WM8350 GPIOs"
259 depends on MFD_WM8350
261 Say yes here to access the GPIO signals of WM8350 power management
262 chips from Wolfson Microelectronics.
265 tristate "WM8994 GPIOs"
266 depends on MFD_WM8994
268 Say yes here to access the GPIO signals of WM8994 audio hub
269 CODECs from Wolfson Microelectronics.
272 tristate "GPIO Support for ADP5520 PMIC"
273 depends on PMIC_ADP5520
275 This option enables support for on-chip GPIO found
276 on Analog Devices ADP5520 PMICs.
278 To compile this driver as a module, choose M here: the module will
279 be called adp5520-gpio.
282 tristate "ADP5588 I2C GPIO expander"
285 This option enables support for 18 GPIOs found
286 on Analog Devices ADP5588 GPIO Expanders.
287 To compile this driver as a module, choose M here: the module will be
290 config GPIO_ADP5588_IRQ
291 bool "Interrupt controller support for ADP5588"
292 depends on GPIO_ADP5588=y
294 Say yes here to enable the adp5588 to be used as an interrupt
295 controller. It requires the driver to be built in the kernel.
297 comment "PCI GPIO expanders:"
300 tristate "AMD CS5535/CS5536 GPIO support"
301 depends on PCI && X86 && !CS5535_GPIO
303 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
304 can be used for quite a number of things. The CS5535/6 is found on
305 AMD Geode and Lemote Yeeloong devices.
310 tristate "BT8XX GPIO abuser"
311 depends on PCI && VIDEO_BT848=n
313 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
314 as a cheap PCI GPIO card.
316 This chip can be found on Miro, Hauppauge and STB TV-cards.
318 The card needs to be physically altered for using it as a
319 GPIO card. For more information on how to build a GPIO card
320 from a BT8xx TV card, see the documentation file at
321 Documentation/bt8xxgpio.txt
326 bool "Intel Langwell/Penwell GPIO support"
327 depends on PCI && X86
329 Say Y here to support Intel Langwell/Penwell GPIO.
332 tristate "PCH GPIO of Intel Topcliff"
333 depends on PCI && X86
335 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
336 which is an IOH(Input/Output Hub) for x86 embedded processor.
337 This driver can access PCH GPIO device.
340 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
343 ML7213 is companion chip for Intel Atom E6xx series.
344 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
345 Hub) which is for IVI(In-Vehicle Infotainment) use.
346 This driver can access the IOH's GPIO device.
348 config GPIO_TIMBERDALE
349 bool "Support for timberdale GPIO IP"
350 depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
352 Add support for the GPIO IP in the timberdale FPGA.
355 tristate "RDC R-321x GPIO support"
356 depends on PCI && GPIOLIB
361 Support for the RDC R321x SoC GPIOs over southbridge
362 PCI configuration space.
364 comment "SPI GPIO expanders:"
367 tristate "Maxim MAX7301 GPIO expander"
368 depends on SPI_MASTER
371 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
374 tristate "Microchip MCP23Sxx I/O expander"
375 depends on SPI_MASTER
377 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
378 This provides a GPIO interface supporting inputs and outputs.
381 tristate "Freescale MC33880 high-side/low-side switch"
382 depends on SPI_MASTER
384 SPI driver for Freescale MC33880 high-side/low-side switch.
385 This provides GPIO interface supporting inputs and outputs.
388 tristate "74x164 serial-in/parallel-out 8-bits shift register"
389 depends on SPI_MASTER
391 Platform driver for 74x164 compatible serial-in/parallel-out
392 8-outputs shift registers. This driver can be used to provide access
393 to more gpio outputs.
395 comment "AC97 GPIO expanders:"
398 bool "Philips UCB1400 GPIO"
399 depends on UCB1400_CORE
401 This enables support for the Philips UCB1400 GPIO pins.
402 The UCB1400 is an AC97 audio codec.
404 To compile this driver as a module, choose M here: the
405 module will be called ucb1400_gpio.
407 comment "MODULbus GPIO expanders:"
410 tristate "Janz VMOD-TTL Digital IO Module"
411 depends on MFD_JANZ_CMODIO
413 This enables support for the Janz VMOD-TTL Digital IO module.
414 This driver provides support for driving the pins in output
415 mode only. Input mode is not supported.