1# 2# GPIO infrastructure and drivers 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 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 drivers in the right section, in alphabetical order 67 68config GPIO_MAX730X 69 tristate 70 71comment "Memory mapped GPIO drivers:" 72 73config GPIO_BASIC_MMIO_CORE 74 tristate 75 help 76 Provides core functionality for basic memory-mapped GPIO controllers. 77 78config GPIO_BASIC_MMIO 79 tristate "Basic memory-mapped GPIO controllers support" 80 select GPIO_BASIC_MMIO_CORE 81 help 82 Say yes here to support basic memory-mapped GPIO controllers. 83 84config GPIO_IT8761E 85 tristate "IT8761E GPIO support" 86 help 87 Say yes here to support GPIO functionality of IT8761E super I/O chip. 88 89config GPIO_EXYNOS4 90 bool "Samsung Exynos4 GPIO library support" 91 default y if CPU_EXYNOS4210 92 depends on ARM 93 help 94 Say yes here to support Samsung Exynos4 series SoCs GPIO library 95 96config GPIO_PLAT_SAMSUNG 97 bool "Samsung SoCs GPIO library support" 98 default y if SAMSUNG_GPIOLIB_4BIT 99 depends on ARM 100 help 101 Say yes here to support Samsung SoCs GPIO library 102 103config GPIO_S5PC100 104 bool "Samsung S5PC100 GPIO library support" 105 default y if CPU_S5PC100 106 depends on ARM 107 help 108 Say yes here to support Samsung S5PC100 SoCs GPIO library 109 110config GPIO_S5PV210 111 bool "Samsung S5PV210/S5PC110 GPIO library support" 112 default y if CPU_S5PV210 113 depends on ARM 114 help 115 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library 116 117config GPIO_PL061 118 bool "PrimeCell PL061 GPIO support" 119 depends on ARM_AMBA 120 help 121 Say yes here to support the PrimeCell PL061 GPIO device 122 123config GPIO_XILINX 124 bool "Xilinx GPIO support" 125 depends on PPC_OF || MICROBLAZE 126 help 127 Say yes here to support the Xilinx FPGA GPIO device 128 129config GPIO_VR41XX 130 tristate "NEC VR4100 series General-purpose I/O Uint support" 131 depends on CPU_VR41XX 132 help 133 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 134 135config GPIO_SCH 136 tristate "Intel SCH/TunnelCreek GPIO" 137 depends on PCI && X86 138 select MFD_CORE 139 select LPC_SCH 140 help 141 Say yes here to support GPIO interface on Intel Poulsbo SCH 142 or Intel Tunnel Creek processor. 143 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 144 powered by the core power rail and are turned off during sleep 145 modes (S3 and higher). The remaining four GPIOs are powered by 146 the Intel SCH suspend power supply. These GPIOs remain 147 active during S3. The suspend powered GPIOs can be used to wake the 148 system from the Suspend-to-RAM state. 149 The Intel Tunnel Creek processor has 5 GPIOs powered by the 150 core power rail and 9 from suspend power supply. 151 152 This driver can also be built as a module. If so, the module 153 will be called sch-gpio. 154 155config GPIO_VX855 156 tristate "VIA VX855/VX875 GPIO" 157 depends on MFD_SUPPORT && PCI 158 select MFD_CORE 159 select MFD_VX855 160 help 161 Support access to the VX855/VX875 GPIO lines through the gpio library. 162 163 This driver provides common support for accessing the device, 164 additional drivers must be enabled in order to use the 165 functionality of the device. 166 167comment "I2C GPIO expanders:" 168 169config GPIO_MAX7300 170 tristate "Maxim MAX7300 GPIO expander" 171 depends on I2C 172 select GPIO_MAX730X 173 help 174 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 175 176config GPIO_MAX732X 177 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 178 depends on I2C 179 help 180 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 181 Port Expanders. Each IO port on these chips has a fixed role of 182 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 183 Input and Output (designed by 'P'). The combinations are listed 184 below: 185 186 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 187 max7322 (4I4O), max7323 (4P4O) 188 189 16 bits: max7324 (8I8O), max7325 (8P8O), 190 max7326 (4I12O), max7327 (4P12O) 191 192 Board setup code must specify the model to use, and the start 193 number for these GPIOs. 194 195config GPIO_MAX732X_IRQ 196 bool "Interrupt controller support for MAX732x" 197 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 198 help 199 Say yes here to enable the max732x to be used as an interrupt 200 controller. It requires the driver to be built in the kernel. 201 202config GPIO_PCA953X 203 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 204 depends on I2C 205 help 206 Say yes here to provide access to several register-oriented 207 SMBus I/O expanders, made mostly by NXP or TI. Compatible 208 models include: 209 210 4 bits: pca9536, pca9537 211 212 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 213 tca6408 214 215 16 bits: pca9535, pca9539, pca9555, tca6416 216 217 This driver can also be built as a module. If so, the module 218 will be called pca953x. 219 220config GPIO_PCA953X_IRQ 221 bool "Interrupt controller support for PCA953x" 222 depends on GPIO_PCA953X=y 223 help 224 Say yes here to enable the pca953x to be used as an interrupt 225 controller. It requires the driver to be built in the kernel. 226 227config GPIO_PCF857X 228 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 229 depends on I2C 230 help 231 Say yes here to provide access to most "quasi-bidirectional" I2C 232 GPIO expanders used for additional digital outputs or inputs. 233 Most of these parts are from NXP, though TI is a second source for 234 some of them. Compatible models include: 235 236 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 237 pca9670, pca9672, pca9674, pca9674a, 238 max7328, max7329 239 240 16 bits: pcf8575, pcf8575c, pca8575, 241 pca9671, pca9673, pca9675 242 243 Your board setup code will need to declare the expanders in 244 use, and assign numbers to the GPIOs they expose. Those GPIOs 245 can then be used from drivers and other kernel code, just like 246 other GPIOs, but only accessible from task contexts. 247 248 This driver provides an in-kernel interface to those GPIOs using 249 platform-neutral GPIO calls. 250 251config GPIO_SX150X 252 bool "Semtech SX150x I2C GPIO expander" 253 depends on I2C=y 254 default n 255 help 256 Say yes here to provide support for Semtech SX150-series I2C 257 GPIO expanders. Compatible models include: 258 259 8 bits: sx1508q 260 16 bits: sx1509q 261 262config GPIO_STMPE 263 bool "STMPE GPIOs" 264 depends on MFD_STMPE 265 help 266 This enables support for the GPIOs found on the STMPE I/O 267 Expanders. 268 269config GPIO_TC3589X 270 bool "TC3589X GPIOs" 271 depends on MFD_TC3589X 272 help 273 This enables support for the GPIOs found on the TC3589X 274 I/O Expander. 275 276config GPIO_TWL4030 277 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 278 depends on TWL4030_CORE 279 help 280 Say yes here to access the GPIO signals of various multi-function 281 power management chips from Texas Instruments. 282 283config GPIO_WM831X 284 tristate "WM831x GPIOs" 285 depends on MFD_WM831X 286 help 287 Say yes here to access the GPIO signals of WM831x power management 288 chips from Wolfson Microelectronics. 289 290config GPIO_WM8350 291 tristate "WM8350 GPIOs" 292 depends on MFD_WM8350 293 help 294 Say yes here to access the GPIO signals of WM8350 power management 295 chips from Wolfson Microelectronics. 296 297config GPIO_WM8994 298 tristate "WM8994 GPIOs" 299 depends on MFD_WM8994 300 help 301 Say yes here to access the GPIO signals of WM8994 audio hub 302 CODECs from Wolfson Microelectronics. 303 304config GPIO_ADP5520 305 tristate "GPIO Support for ADP5520 PMIC" 306 depends on PMIC_ADP5520 307 help 308 This option enables support for on-chip GPIO found 309 on Analog Devices ADP5520 PMICs. 310 311 To compile this driver as a module, choose M here: the module will 312 be called adp5520-gpio. 313 314config GPIO_ADP5588 315 tristate "ADP5588 I2C GPIO expander" 316 depends on I2C 317 help 318 This option enables support for 18 GPIOs found 319 on Analog Devices ADP5588 GPIO Expanders. 320 To compile this driver as a module, choose M here: the module will be 321 called adp5588-gpio. 322 323config GPIO_ADP5588_IRQ 324 bool "Interrupt controller support for ADP5588" 325 depends on GPIO_ADP5588=y 326 help 327 Say yes here to enable the adp5588 to be used as an interrupt 328 controller. It requires the driver to be built in the kernel. 329 330comment "PCI GPIO expanders:" 331 332config GPIO_CS5535 333 tristate "AMD CS5535/CS5536 GPIO support" 334 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 335 help 336 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 337 can be used for quite a number of things. The CS5535/6 is found on 338 AMD Geode and Lemote Yeeloong devices. 339 340 If unsure, say N. 341 342config GPIO_BT8XX 343 tristate "BT8XX GPIO abuser" 344 depends on PCI && VIDEO_BT848=n 345 help 346 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 347 as a cheap PCI GPIO card. 348 349 This chip can be found on Miro, Hauppauge and STB TV-cards. 350 351 The card needs to be physically altered for using it as a 352 GPIO card. For more information on how to build a GPIO card 353 from a BT8xx TV card, see the documentation file at 354 Documentation/bt8xxgpio.txt 355 356 If unsure, say N. 357 358config GPIO_LANGWELL 359 bool "Intel Langwell/Penwell GPIO support" 360 depends on PCI && X86 361 help 362 Say Y here to support Intel Langwell/Penwell GPIO. 363 364config GPIO_PCH 365 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 366 depends on PCI && X86 367 help 368 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 369 which is an IOH(Input/Output Hub) for x86 embedded processor. 370 This driver can access PCH GPIO device. 371 372 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 373 Output Hub), ML7223. 374 ML7223 IOH is for MP(Media Phone) use. 375 ML7223 is companion chip for Intel Atom E6xx series. 376 ML7223 is completely compatible for Intel EG20T PCH. 377 378config GPIO_ML_IOH 379 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 380 depends on PCI 381 help 382 ML7213 is companion chip for Intel Atom E6xx series. 383 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 384 Hub) which is for IVI(In-Vehicle Infotainment) use. 385 This driver can access the IOH's GPIO device. 386 387config GPIO_TIMBERDALE 388 bool "Support for timberdale GPIO IP" 389 depends on MFD_TIMBERDALE && HAS_IOMEM 390 ---help--- 391 Add support for the GPIO IP in the timberdale FPGA. 392 393config GPIO_RDC321X 394 tristate "RDC R-321x GPIO support" 395 depends on PCI 396 select MFD_SUPPORT 397 select MFD_CORE 398 select MFD_RDC321X 399 help 400 Support for the RDC R321x SoC GPIOs over southbridge 401 PCI configuration space. 402 403comment "SPI GPIO expanders:" 404 405config GPIO_MAX7301 406 tristate "Maxim MAX7301 GPIO expander" 407 depends on SPI_MASTER 408 select GPIO_MAX730X 409 help 410 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 411 412config GPIO_MCP23S08 413 tristate "Microchip MCP23Sxx I/O expander" 414 depends on SPI_MASTER 415 help 416 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 417 This provides a GPIO interface supporting inputs and outputs. 418 419config GPIO_MC33880 420 tristate "Freescale MC33880 high-side/low-side switch" 421 depends on SPI_MASTER 422 help 423 SPI driver for Freescale MC33880 high-side/low-side switch. 424 This provides GPIO interface supporting inputs and outputs. 425 426config GPIO_74X164 427 tristate "74x164 serial-in/parallel-out 8-bits shift register" 428 depends on SPI_MASTER 429 help 430 Platform driver for 74x164 compatible serial-in/parallel-out 431 8-outputs shift registers. This driver can be used to provide access 432 to more gpio outputs. 433 434comment "AC97 GPIO expanders:" 435 436config GPIO_UCB1400 437 bool "Philips UCB1400 GPIO" 438 depends on UCB1400_CORE 439 help 440 This enables support for the Philips UCB1400 GPIO pins. 441 The UCB1400 is an AC97 audio codec. 442 443 To compile this driver as a module, choose M here: the 444 module will be called ucb1400_gpio. 445 446comment "MODULbus GPIO expanders:" 447 448config GPIO_JANZ_TTL 449 tristate "Janz VMOD-TTL Digital IO Module" 450 depends on MFD_JANZ_CMODIO 451 help 452 This enables support for the Janz VMOD-TTL Digital IO module. 453 This driver provides support for driving the pins in output 454 mode only. Input mode is not supported. 455 456config AB8500_GPIO 457 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 458 depends on AB8500_CORE && BROKEN 459 help 460 Select this to enable the AB8500 IC GPIO driver 461 462config GPIO_TPS65910 463 bool "TPS65910 GPIO" 464 depends on MFD_TPS65910 465 help 466 Select this option to enable GPIO driver for the TPS65910 467 chip family. 468endif 469