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