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 GPIO"
104 depends on GPIOLIB && PCI
108 Say yes here to support GPIO interface on Intel Poulsbo SCH.
109 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
110 powered by the core power rail and are turned off during sleep
111 modes (S3 and higher). The remaining four GPIOs are powered by
112 the Intel SCH suspend power supply. These GPIOs remain
113 active during S3. The suspend powered GPIOs can be used to wake the
114 system from the Suspend-to-RAM state.
116 This driver can also be built as a module. If so, the module
117 will be called sch-gpio.
120 tristate "VIA VX855/VX875 GPIO"
121 depends on GPIOLIB && MFD_SUPPORT && PCI
125 Support access to the VX855/VX875 GPIO lines through the gpio library.
127 This driver provides common support for accessing the device,
128 additional drivers must be enabled in order to use the
129 functionality of the device.
131 comment "I2C GPIO expanders:"
134 tristate "Maxim MAX7300 GPIO expander"
138 GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
141 tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
144 Say yes here to support the MAX7319, MAX7320-7327 series of I2C
145 Port Expanders. Each IO port on these chips has a fixed role of
146 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
147 Input and Output (designed by 'P'). The combinations are listed
150 8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
151 max7322 (4I4O), max7323 (4P4O)
153 16 bits: max7324 (8I8O), max7325 (8P8O),
154 max7326 (4I12O), max7327 (4P12O)
156 Board setup code must specify the model to use, and the start
157 number for these GPIOs.
159 config GPIO_MAX732X_IRQ
160 bool "Interrupt controller support for MAX732x"
161 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
163 Say yes here to enable the max732x to be used as an interrupt
164 controller. It requires the driver to be built in the kernel.
167 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
170 Say yes here to provide access to several register-oriented
171 SMBus I/O expanders, made mostly by NXP or TI. Compatible
174 4 bits: pca9536, pca9537
176 8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
179 16 bits: pca9535, pca9539, pca9555, tca6416
181 This driver can also be built as a module. If so, the module
182 will be called pca953x.
184 config GPIO_PCA953X_IRQ
185 bool "Interrupt controller support for PCA953x"
186 depends on GPIO_PCA953X=y
188 Say yes here to enable the pca953x to be used as an interrupt
189 controller. It requires the driver to be built in the kernel.
192 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
195 Say yes here to provide access to most "quasi-bidirectional" I2C
196 GPIO expanders used for additional digital outputs or inputs.
197 Most of these parts are from NXP, though TI is a second source for
198 some of them. Compatible models include:
200 8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
201 pca9670, pca9672, pca9674, pca9674a,
204 16 bits: pcf8575, pcf8575c, pca8575,
205 pca9671, pca9673, pca9675
207 Your board setup code will need to declare the expanders in
208 use, and assign numbers to the GPIOs they expose. Those GPIOs
209 can then be used from drivers and other kernel code, just like
210 other GPIOs, but only accessible from task contexts.
212 This driver provides an in-kernel interface to those GPIOs using
213 platform-neutral GPIO calls.
216 bool "Semtech SX150x I2C GPIO expander"
220 Say yes here to provide support for Semtech SX150-series I2C
221 GPIO expanders. Compatible models include:
230 This enables support for the GPIOs found on the STMPE I/O
235 depends on MFD_TC3589X
237 This enables support for the GPIOs found on the TC3589X
241 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
242 depends on TWL4030_CORE
244 Say yes here to access the GPIO signals of various multi-function
245 power management chips from Texas Instruments.
248 tristate "WM831x GPIOs"
249 depends on MFD_WM831X
251 Say yes here to access the GPIO signals of WM831x power management
252 chips from Wolfson Microelectronics.
255 tristate "WM8350 GPIOs"
256 depends on MFD_WM8350
258 Say yes here to access the GPIO signals of WM8350 power management
259 chips from Wolfson Microelectronics.
262 tristate "WM8994 GPIOs"
263 depends on MFD_WM8994
265 Say yes here to access the GPIO signals of WM8994 audio hub
266 CODECs from Wolfson Microelectronics.
269 tristate "GPIO Support for ADP5520 PMIC"
270 depends on PMIC_ADP5520
272 This option enables support for on-chip GPIO found
273 on Analog Devices ADP5520 PMICs.
275 To compile this driver as a module, choose M here: the module will
276 be called adp5520-gpio.
279 tristate "ADP5588 I2C GPIO expander"
282 This option enables support for 18 GPIOs found
283 on Analog Devices ADP5588 GPIO Expanders.
284 To compile this driver as a module, choose M here: the module will be
287 config GPIO_ADP5588_IRQ
288 bool "Interrupt controller support for ADP5588"
289 depends on GPIO_ADP5588=y
291 Say yes here to enable the adp5588 to be used as an interrupt
292 controller. It requires the driver to be built in the kernel.
294 comment "PCI GPIO expanders:"
297 tristate "AMD CS5535/CS5536 GPIO support"
298 depends on PCI && X86 && !CS5535_GPIO
300 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
301 can be used for quite a number of things. The CS5535/6 is found on
302 AMD Geode and Lemote Yeeloong devices.
307 tristate "BT8XX GPIO abuser"
308 depends on PCI && VIDEO_BT848=n
310 The BT8xx frame grabber chip has 24 GPIO pins than can be abused
311 as a cheap PCI GPIO card.
313 This chip can be found on Miro, Hauppauge and STB TV-cards.
315 The card needs to be physically altered for using it as a
316 GPIO card. For more information on how to build a GPIO card
317 from a BT8xx TV card, see the documentation file at
318 Documentation/bt8xxgpio.txt
323 bool "Intel Langwell/Penwell GPIO support"
326 Say Y here to support Intel Langwell/Penwell GPIO.
329 tristate "PCH GPIO of Intel Topcliff"
332 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
333 which is an IOH(Input/Output Hub) for x86 embedded processor.
334 This driver can access PCH GPIO device.
337 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
340 ML7213 is companion chip for Intel Atom E6xx series.
341 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
342 Hub) which is for IVI(In-Vehicle Infotainment) use.
343 This driver can access the IOH's GPIO device.
345 config GPIO_TIMBERDALE
346 bool "Support for timberdale GPIO IP"
347 depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
349 Add support for the GPIO IP in the timberdale FPGA.
352 tristate "RDC R-321x GPIO support"
353 depends on PCI && GPIOLIB
358 Support for the RDC R321x SoC GPIOs over southbridge
359 PCI configuration space.
361 comment "SPI GPIO expanders:"
364 tristate "Maxim MAX7301 GPIO expander"
365 depends on SPI_MASTER
368 GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
371 tristate "Microchip MCP23Sxx I/O expander"
372 depends on SPI_MASTER
374 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
375 This provides a GPIO interface supporting inputs and outputs.
378 tristate "Freescale MC33880 high-side/low-side switch"
379 depends on SPI_MASTER
381 SPI driver for Freescale MC33880 high-side/low-side switch.
382 This provides GPIO interface supporting inputs and outputs.
385 tristate "74x164 serial-in/parallel-out 8-bits shift register"
386 depends on SPI_MASTER
388 Platform driver for 74x164 compatible serial-in/parallel-out
389 8-outputs shift registers. This driver can be used to provide access
390 to more gpio outputs.
392 comment "AC97 GPIO expanders:"
395 bool "Philips UCB1400 GPIO"
396 depends on UCB1400_CORE
398 This enables support for the Philips UCB1400 GPIO pins.
399 The UCB1400 is an AC97 audio codec.
401 To compile this driver as a module, choose M here: the
402 module will be called ucb1400_gpio.
404 comment "MODULbus GPIO expanders:"
407 tristate "Janz VMOD-TTL Digital IO Module"
408 depends on MFD_JANZ_CMODIO
410 This enables support for the Janz VMOD-TTL Digital IO module.
411 This driver provides support for driving the pins in output
412 mode only. Input mode is not supported.