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_EP93XX 90 def_bool y 91 depends on ARCH_EP93XX 92 93config GPIO_EXYNOS4 94 def_bool y 95 depends on CPU_EXYNOS4210 96 97config GPIO_PLAT_SAMSUNG 98 def_bool y 99 depends on SAMSUNG_GPIOLIB_4BIT 100 101config GPIO_S5PC100 102 def_bool y 103 depends on CPU_S5PC100 104 105config GPIO_S5PV210 106 def_bool y 107 depends on CPU_S5PV210 108 109config GPIO_PL061 110 bool "PrimeCell PL061 GPIO support" 111 depends on ARM_AMBA 112 help 113 Say yes here to support the PrimeCell PL061 GPIO device 114 115config GPIO_XILINX 116 bool "Xilinx GPIO support" 117 depends on PPC_OF || MICROBLAZE 118 help 119 Say yes here to support the Xilinx FPGA GPIO device 120 121config GPIO_VR41XX 122 tristate "NEC VR4100 series General-purpose I/O Uint support" 123 depends on CPU_VR41XX 124 help 125 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 126 127config GPIO_SCH 128 tristate "Intel SCH/TunnelCreek GPIO" 129 depends on PCI && X86 130 select MFD_CORE 131 select LPC_SCH 132 help 133 Say yes here to support GPIO interface on Intel Poulsbo SCH 134 or Intel Tunnel Creek processor. 135 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 136 powered by the core power rail and are turned off during sleep 137 modes (S3 and higher). The remaining four GPIOs are powered by 138 the Intel SCH suspend power supply. These GPIOs remain 139 active during S3. The suspend powered GPIOs can be used to wake the 140 system from the Suspend-to-RAM state. 141 The Intel Tunnel Creek processor has 5 GPIOs powered by the 142 core power rail and 9 from suspend power supply. 143 144 This driver can also be built as a module. If so, the module 145 will be called sch-gpio. 146 147config GPIO_VX855 148 tristate "VIA VX855/VX875 GPIO" 149 depends on MFD_SUPPORT && PCI 150 select MFD_CORE 151 select MFD_VX855 152 help 153 Support access to the VX855/VX875 GPIO lines through the gpio library. 154 155 This driver provides common support for accessing the device, 156 additional drivers must be enabled in order to use the 157 functionality of the device. 158 159comment "I2C GPIO expanders:" 160 161config GPIO_MAX7300 162 tristate "Maxim MAX7300 GPIO expander" 163 depends on I2C 164 select GPIO_MAX730X 165 help 166 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 167 168config GPIO_MAX732X 169 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 170 depends on I2C 171 help 172 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 173 Port Expanders. Each IO port on these chips has a fixed role of 174 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 175 Input and Output (designed by 'P'). The combinations are listed 176 below: 177 178 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 179 max7322 (4I4O), max7323 (4P4O) 180 181 16 bits: max7324 (8I8O), max7325 (8P8O), 182 max7326 (4I12O), max7327 (4P12O) 183 184 Board setup code must specify the model to use, and the start 185 number for these GPIOs. 186 187config GPIO_MAX732X_IRQ 188 bool "Interrupt controller support for MAX732x" 189 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 190 help 191 Say yes here to enable the max732x to be used as an interrupt 192 controller. It requires the driver to be built in the kernel. 193 194config GPIO_PCA953X 195 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 196 depends on I2C 197 help 198 Say yes here to provide access to several register-oriented 199 SMBus I/O expanders, made mostly by NXP or TI. Compatible 200 models include: 201 202 4 bits: pca9536, pca9537 203 204 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 205 tca6408 206 207 16 bits: pca9535, pca9539, pca9555, tca6416 208 209 This driver can also be built as a module. If so, the module 210 will be called pca953x. 211 212config GPIO_PCA953X_IRQ 213 bool "Interrupt controller support for PCA953x" 214 depends on GPIO_PCA953X=y 215 help 216 Say yes here to enable the pca953x to be used as an interrupt 217 controller. It requires the driver to be built in the kernel. 218 219config GPIO_PCF857X 220 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 221 depends on I2C 222 help 223 Say yes here to provide access to most "quasi-bidirectional" I2C 224 GPIO expanders used for additional digital outputs or inputs. 225 Most of these parts are from NXP, though TI is a second source for 226 some of them. Compatible models include: 227 228 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 229 pca9670, pca9672, pca9674, pca9674a, 230 max7328, max7329 231 232 16 bits: pcf8575, pcf8575c, pca8575, 233 pca9671, pca9673, pca9675 234 235 Your board setup code will need to declare the expanders in 236 use, and assign numbers to the GPIOs they expose. Those GPIOs 237 can then be used from drivers and other kernel code, just like 238 other GPIOs, but only accessible from task contexts. 239 240 This driver provides an in-kernel interface to those GPIOs using 241 platform-neutral GPIO calls. 242 243config GPIO_SX150X 244 bool "Semtech SX150x I2C GPIO expander" 245 depends on I2C=y 246 default n 247 help 248 Say yes here to provide support for Semtech SX150-series I2C 249 GPIO expanders. Compatible models include: 250 251 8 bits: sx1508q 252 16 bits: sx1509q 253 254config GPIO_STMPE 255 bool "STMPE GPIOs" 256 depends on MFD_STMPE 257 help 258 This enables support for the GPIOs found on the STMPE I/O 259 Expanders. 260 261config GPIO_TC3589X 262 bool "TC3589X GPIOs" 263 depends on MFD_TC3589X 264 help 265 This enables support for the GPIOs found on the TC3589X 266 I/O Expander. 267 268config GPIO_TWL4030 269 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 270 depends on TWL4030_CORE 271 help 272 Say yes here to access the GPIO signals of various multi-function 273 power management chips from Texas Instruments. 274 275config GPIO_WM831X 276 tristate "WM831x GPIOs" 277 depends on MFD_WM831X 278 help 279 Say yes here to access the GPIO signals of WM831x power management 280 chips from Wolfson Microelectronics. 281 282config GPIO_WM8350 283 tristate "WM8350 GPIOs" 284 depends on MFD_WM8350 285 help 286 Say yes here to access the GPIO signals of WM8350 power management 287 chips from Wolfson Microelectronics. 288 289config GPIO_WM8994 290 tristate "WM8994 GPIOs" 291 depends on MFD_WM8994 292 help 293 Say yes here to access the GPIO signals of WM8994 audio hub 294 CODECs from Wolfson Microelectronics. 295 296config GPIO_ADP5520 297 tristate "GPIO Support for ADP5520 PMIC" 298 depends on PMIC_ADP5520 299 help 300 This option enables support for on-chip GPIO found 301 on Analog Devices ADP5520 PMICs. 302 303 To compile this driver as a module, choose M here: the module will 304 be called adp5520-gpio. 305 306config GPIO_ADP5588 307 tristate "ADP5588 I2C GPIO expander" 308 depends on I2C 309 help 310 This option enables support for 18 GPIOs found 311 on Analog Devices ADP5588 GPIO Expanders. 312 To compile this driver as a module, choose M here: the module will be 313 called adp5588-gpio. 314 315config GPIO_ADP5588_IRQ 316 bool "Interrupt controller support for ADP5588" 317 depends on GPIO_ADP5588=y 318 help 319 Say yes here to enable the adp5588 to be used as an interrupt 320 controller. It requires the driver to be built in the kernel. 321 322comment "PCI GPIO expanders:" 323 324config GPIO_CS5535 325 tristate "AMD CS5535/CS5536 GPIO support" 326 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 327 help 328 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 329 can be used for quite a number of things. The CS5535/6 is found on 330 AMD Geode and Lemote Yeeloong devices. 331 332 If unsure, say N. 333 334config GPIO_BT8XX 335 tristate "BT8XX GPIO abuser" 336 depends on PCI && VIDEO_BT848=n 337 help 338 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 339 as a cheap PCI GPIO card. 340 341 This chip can be found on Miro, Hauppauge and STB TV-cards. 342 343 The card needs to be physically altered for using it as a 344 GPIO card. For more information on how to build a GPIO card 345 from a BT8xx TV card, see the documentation file at 346 Documentation/bt8xxgpio.txt 347 348 If unsure, say N. 349 350config GPIO_LANGWELL 351 bool "Intel Langwell/Penwell GPIO support" 352 depends on PCI && X86 353 help 354 Say Y here to support Intel Langwell/Penwell GPIO. 355 356config GPIO_PCH 357 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 358 depends on PCI && X86 359 help 360 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 361 which is an IOH(Input/Output Hub) for x86 embedded processor. 362 This driver can access PCH GPIO device. 363 364 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 365 Output Hub), ML7223. 366 ML7223 IOH is for MP(Media Phone) use. 367 ML7223 is companion chip for Intel Atom E6xx series. 368 ML7223 is completely compatible for Intel EG20T PCH. 369 370config GPIO_ML_IOH 371 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 372 depends on PCI 373 help 374 ML7213 is companion chip for Intel Atom E6xx series. 375 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 376 Hub) which is for IVI(In-Vehicle Infotainment) use. 377 This driver can access the IOH's GPIO device. 378 379config GPIO_TIMBERDALE 380 bool "Support for timberdale GPIO IP" 381 depends on MFD_TIMBERDALE && HAS_IOMEM 382 ---help--- 383 Add support for the GPIO IP in the timberdale FPGA. 384 385config GPIO_RDC321X 386 tristate "RDC R-321x GPIO support" 387 depends on PCI 388 select MFD_SUPPORT 389 select MFD_CORE 390 select MFD_RDC321X 391 help 392 Support for the RDC R321x SoC GPIOs over southbridge 393 PCI configuration space. 394 395comment "SPI GPIO expanders:" 396 397config GPIO_MAX7301 398 tristate "Maxim MAX7301 GPIO expander" 399 depends on SPI_MASTER 400 select GPIO_MAX730X 401 help 402 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 403 404config GPIO_MCP23S08 405 tristate "Microchip MCP23Sxx I/O expander" 406 depends on SPI_MASTER 407 help 408 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 409 This provides a GPIO interface supporting inputs and outputs. 410 411config GPIO_MC33880 412 tristate "Freescale MC33880 high-side/low-side switch" 413 depends on SPI_MASTER 414 help 415 SPI driver for Freescale MC33880 high-side/low-side switch. 416 This provides GPIO interface supporting inputs and outputs. 417 418config GPIO_74X164 419 tristate "74x164 serial-in/parallel-out 8-bits shift register" 420 depends on SPI_MASTER 421 help 422 Platform driver for 74x164 compatible serial-in/parallel-out 423 8-outputs shift registers. This driver can be used to provide access 424 to more gpio outputs. 425 426comment "AC97 GPIO expanders:" 427 428config GPIO_UCB1400 429 bool "Philips UCB1400 GPIO" 430 depends on UCB1400_CORE 431 help 432 This enables support for the Philips UCB1400 GPIO pins. 433 The UCB1400 is an AC97 audio codec. 434 435 To compile this driver as a module, choose M here: the 436 module will be called ucb1400_gpio. 437 438comment "MODULbus GPIO expanders:" 439 440config GPIO_JANZ_TTL 441 tristate "Janz VMOD-TTL Digital IO Module" 442 depends on MFD_JANZ_CMODIO 443 help 444 This enables support for the Janz VMOD-TTL Digital IO module. 445 This driver provides support for driving the pins in output 446 mode only. Input mode is not supported. 447 448config AB8500_GPIO 449 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 450 depends on AB8500_CORE && BROKEN 451 help 452 Select this to enable the AB8500 IC GPIO driver 453 454config GPIO_TPS65910 455 bool "TPS65910 GPIO" 456 depends on MFD_TPS65910 457 help 458 Select this option to enable GPIO driver for the TPS65910 459 chip family. 460endif 461