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