1# 2# platform-neutral GPIO infrastructure and expanders 3# 4 5config ARCH_WANT_OPTIONAL_GPIOLIB 6 bool 7 help 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. 14 15config ARCH_REQUIRE_GPIOLIB 16 bool 17 select GPIOLIB 18 help 19 Platforms select gpiolib if they use this infrastructure 20 for all their GPIOs, usually starting with ones integrated 21 into SOC processors. 22 Selecting this from the architecture code will cause the gpiolib 23 code to always get built in. 24 25 26 27menuconfig GPIOLIB 28 bool "GPIO Support" 29 depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB 30 select GENERIC_GPIO 31 help 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. 35 36 If unsure, say N. 37 38if GPIOLIB 39 40config DEBUG_GPIO 41 bool "Debug GPIO calls" 42 depends on DEBUG_KERNEL 43 help 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. 50 51config GPIO_SYSFS 52 bool "/sys/class/gpio/... (sysfs interface)" 53 depends on SYSFS && EXPERIMENTAL 54 help 55 Say Y here to add a sysfs interface for GPIOs. 56 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. 62 63 Kernel drivers may also request that a particular GPIO be 64 exported to userspace; this can be useful when debugging. 65 66# put expanders in the right section, in alphabetical order 67 68config GPIO_MAX730X 69 tristate 70 71comment "Memory mapped GPIO expanders:" 72 73config GPIO_BASIC_MMIO 74 tristate "Basic memory-mapped GPIO controllers support" 75 help 76 Say yes here to support basic memory-mapped GPIO controllers. 77 78config GPIO_IT8761E 79 tristate "IT8761E GPIO support" 80 help 81 Say yes here to support GPIO functionality of IT8761E super I/O chip. 82 83config GPIO_PL061 84 bool "PrimeCell PL061 GPIO support" 85 depends on ARM_AMBA 86 help 87 Say yes here to support the PrimeCell PL061 GPIO device 88 89config GPIO_XILINX 90 bool "Xilinx GPIO support" 91 depends on PPC_OF || MICROBLAZE 92 help 93 Say yes here to support the Xilinx FPGA GPIO device 94 95config GPIO_VR41XX 96 tristate "NEC VR4100 series General-purpose I/O Uint support" 97 depends on CPU_VR41XX 98 help 99 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 100 101config GPIO_SCH 102 tristate "Intel SCH/TunnelCreek GPIO" 103 depends on PCI && X86 104 select MFD_CORE 105 select LPC_SCH 106 help 107 Say yes here to support GPIO interface on Intel Poulsbo SCH 108 or Intel Tunnel Creek processor. 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. 115 The Intel Tunnel Creek processor has 5 GPIOs powered by the 116 core power rail and 9 from suspend power supply. 117 118 This driver can also be built as a module. If so, the module 119 will be called sch-gpio. 120 121config GPIO_VX855 122 tristate "VIA VX855/VX875 GPIO" 123 depends on MFD_SUPPORT && PCI 124 select MFD_CORE 125 select MFD_VX855 126 help 127 Support access to the VX855/VX875 GPIO lines through the gpio library. 128 129 This driver provides common support for accessing the device, 130 additional drivers must be enabled in order to use the 131 functionality of the device. 132 133comment "I2C GPIO expanders:" 134 135config GPIO_MAX7300 136 tristate "Maxim MAX7300 GPIO expander" 137 depends on I2C 138 select GPIO_MAX730X 139 help 140 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 141 142config GPIO_MAX732X 143 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 144 depends on I2C 145 help 146 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 147 Port Expanders. Each IO port on these chips has a fixed role of 148 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 149 Input and Output (designed by 'P'). The combinations are listed 150 below: 151 152 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 153 max7322 (4I4O), max7323 (4P4O) 154 155 16 bits: max7324 (8I8O), max7325 (8P8O), 156 max7326 (4I12O), max7327 (4P12O) 157 158 Board setup code must specify the model to use, and the start 159 number for these GPIOs. 160 161config GPIO_MAX732X_IRQ 162 bool "Interrupt controller support for MAX732x" 163 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 164 help 165 Say yes here to enable the max732x to be used as an interrupt 166 controller. It requires the driver to be built in the kernel. 167 168config GPIO_PCA953X 169 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 170 depends on I2C 171 help 172 Say yes here to provide access to several register-oriented 173 SMBus I/O expanders, made mostly by NXP or TI. Compatible 174 models include: 175 176 4 bits: pca9536, pca9537 177 178 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 179 tca6408 180 181 16 bits: pca9535, pca9539, pca9555, tca6416 182 183 This driver can also be built as a module. If so, the module 184 will be called pca953x. 185 186config GPIO_PCA953X_IRQ 187 bool "Interrupt controller support for PCA953x" 188 depends on GPIO_PCA953X=y 189 help 190 Say yes here to enable the pca953x to be used as an interrupt 191 controller. It requires the driver to be built in the kernel. 192 193config GPIO_PCF857X 194 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 195 depends on I2C 196 help 197 Say yes here to provide access to most "quasi-bidirectional" I2C 198 GPIO expanders used for additional digital outputs or inputs. 199 Most of these parts are from NXP, though TI is a second source for 200 some of them. Compatible models include: 201 202 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 203 pca9670, pca9672, pca9674, pca9674a, 204 max7328, max7329 205 206 16 bits: pcf8575, pcf8575c, pca8575, 207 pca9671, pca9673, pca9675 208 209 Your board setup code will need to declare the expanders in 210 use, and assign numbers to the GPIOs they expose. Those GPIOs 211 can then be used from drivers and other kernel code, just like 212 other GPIOs, but only accessible from task contexts. 213 214 This driver provides an in-kernel interface to those GPIOs using 215 platform-neutral GPIO calls. 216 217config GPIO_SX150X 218 bool "Semtech SX150x I2C GPIO expander" 219 depends on I2C=y 220 default n 221 help 222 Say yes here to provide support for Semtech SX150-series I2C 223 GPIO expanders. Compatible models include: 224 225 8 bits: sx1508q 226 16 bits: sx1509q 227 228config GPIO_STMPE 229 bool "STMPE GPIOs" 230 depends on MFD_STMPE 231 help 232 This enables support for the GPIOs found on the STMPE I/O 233 Expanders. 234 235config GPIO_TC3589X 236 bool "TC3589X GPIOs" 237 depends on MFD_TC3589X 238 help 239 This enables support for the GPIOs found on the TC3589X 240 I/O Expander. 241 242config GPIO_TWL4030 243 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 244 depends on TWL4030_CORE 245 help 246 Say yes here to access the GPIO signals of various multi-function 247 power management chips from Texas Instruments. 248 249config GPIO_WM831X 250 tristate "WM831x GPIOs" 251 depends on MFD_WM831X 252 help 253 Say yes here to access the GPIO signals of WM831x power management 254 chips from Wolfson Microelectronics. 255 256config GPIO_WM8350 257 tristate "WM8350 GPIOs" 258 depends on MFD_WM8350 259 help 260 Say yes here to access the GPIO signals of WM8350 power management 261 chips from Wolfson Microelectronics. 262 263config GPIO_WM8994 264 tristate "WM8994 GPIOs" 265 depends on MFD_WM8994 266 help 267 Say yes here to access the GPIO signals of WM8994 audio hub 268 CODECs from Wolfson Microelectronics. 269 270config GPIO_ADP5520 271 tristate "GPIO Support for ADP5520 PMIC" 272 depends on PMIC_ADP5520 273 help 274 This option enables support for on-chip GPIO found 275 on Analog Devices ADP5520 PMICs. 276 277 To compile this driver as a module, choose M here: the module will 278 be called adp5520-gpio. 279 280config GPIO_ADP5588 281 tristate "ADP5588 I2C GPIO expander" 282 depends on I2C 283 help 284 This option enables support for 18 GPIOs found 285 on Analog Devices ADP5588 GPIO Expanders. 286 To compile this driver as a module, choose M here: the module will be 287 called adp5588-gpio. 288 289config GPIO_ADP5588_IRQ 290 bool "Interrupt controller support for ADP5588" 291 depends on GPIO_ADP5588=y 292 help 293 Say yes here to enable the adp5588 to be used as an interrupt 294 controller. It requires the driver to be built in the kernel. 295 296comment "PCI GPIO expanders:" 297 298config GPIO_CS5535 299 tristate "AMD CS5535/CS5536 GPIO support" 300 depends on PCI && X86 && !CS5535_GPIO 301 help 302 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 303 can be used for quite a number of things. The CS5535/6 is found on 304 AMD Geode and Lemote Yeeloong devices. 305 306 If unsure, say N. 307 308config GPIO_BT8XX 309 tristate "BT8XX GPIO abuser" 310 depends on PCI && VIDEO_BT848=n 311 help 312 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 313 as a cheap PCI GPIO card. 314 315 This chip can be found on Miro, Hauppauge and STB TV-cards. 316 317 The card needs to be physically altered for using it as a 318 GPIO card. For more information on how to build a GPIO card 319 from a BT8xx TV card, see the documentation file at 320 Documentation/bt8xxgpio.txt 321 322 If unsure, say N. 323 324config GPIO_LANGWELL 325 bool "Intel Langwell/Penwell GPIO support" 326 depends on PCI && X86 327 help 328 Say Y here to support Intel Langwell/Penwell GPIO. 329 330config GPIO_PCH 331 tristate "PCH GPIO of Intel Topcliff" 332 depends on PCI && X86 333 help 334 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 335 which is an IOH(Input/Output Hub) for x86 embedded processor. 336 This driver can access PCH GPIO device. 337 338config GPIO_ML_IOH 339 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 340 depends on PCI 341 help 342 ML7213 is companion chip for Intel Atom E6xx series. 343 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 344 Hub) which is for IVI(In-Vehicle Infotainment) use. 345 This driver can access the IOH's GPIO device. 346 347config GPIO_TIMBERDALE 348 bool "Support for timberdale GPIO IP" 349 depends on MFD_TIMBERDALE && HAS_IOMEM 350 ---help--- 351 Add support for the GPIO IP in the timberdale FPGA. 352 353config GPIO_RDC321X 354 tristate "RDC R-321x GPIO support" 355 depends on PCI 356 select MFD_SUPPORT 357 select MFD_CORE 358 select MFD_RDC321X 359 help 360 Support for the RDC R321x SoC GPIOs over southbridge 361 PCI configuration space. 362 363comment "SPI GPIO expanders:" 364 365config GPIO_MAX7301 366 tristate "Maxim MAX7301 GPIO expander" 367 depends on SPI_MASTER 368 select GPIO_MAX730X 369 help 370 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 371 372config GPIO_MCP23S08 373 tristate "Microchip MCP23Sxx I/O expander" 374 depends on SPI_MASTER 375 help 376 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 377 This provides a GPIO interface supporting inputs and outputs. 378 379config GPIO_MC33880 380 tristate "Freescale MC33880 high-side/low-side switch" 381 depends on SPI_MASTER 382 help 383 SPI driver for Freescale MC33880 high-side/low-side switch. 384 This provides GPIO interface supporting inputs and outputs. 385 386config GPIO_74X164 387 tristate "74x164 serial-in/parallel-out 8-bits shift register" 388 depends on SPI_MASTER 389 help 390 Platform driver for 74x164 compatible serial-in/parallel-out 391 8-outputs shift registers. This driver can be used to provide access 392 to more gpio outputs. 393 394comment "AC97 GPIO expanders:" 395 396config GPIO_UCB1400 397 bool "Philips UCB1400 GPIO" 398 depends on UCB1400_CORE 399 help 400 This enables support for the Philips UCB1400 GPIO pins. 401 The UCB1400 is an AC97 audio codec. 402 403 To compile this driver as a module, choose M here: the 404 module will be called ucb1400_gpio. 405 406comment "MODULbus GPIO expanders:" 407 408config GPIO_JANZ_TTL 409 tristate "Janz VMOD-TTL Digital IO Module" 410 depends on MFD_JANZ_CMODIO 411 help 412 This enables support for the Janz VMOD-TTL Digital IO module. 413 This driver provides support for driving the pins in output 414 mode only. Input mode is not supported. 415 416config AB8500_GPIO 417 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 418 depends on AB8500_CORE && BROKEN 419 help 420 Select this to enable the AB8500 IC GPIO driver 421endif 422