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_MXS 97 def_bool y 98 depends on ARCH_MXS 99 100config GPIO_PLAT_SAMSUNG 101 bool "Samsung SoCs GPIO library support" 102 default y if SAMSUNG_GPIOLIB_4BIT 103 depends on ARM 104 help 105 Say yes here to support Samsung SoCs GPIO library 106 107config GPIO_S5PC100 108 bool "Samsung S5PC100 GPIO library support" 109 default y if CPU_S5PC100 110 depends on ARM 111 help 112 Say yes here to support Samsung S5PC100 SoCs GPIO library 113 114config GPIO_S5PV210 115 bool "Samsung S5PV210/S5PC110 GPIO library support" 116 default y if CPU_S5PV210 117 depends on ARM 118 help 119 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library 120 121config GPIO_PL061 122 bool "PrimeCell PL061 GPIO support" 123 depends on ARM_AMBA 124 help 125 Say yes here to support the PrimeCell PL061 GPIO device 126 127config GPIO_XILINX 128 bool "Xilinx GPIO support" 129 depends on PPC_OF || MICROBLAZE 130 help 131 Say yes here to support the Xilinx FPGA GPIO device 132 133config GPIO_VR41XX 134 tristate "NEC VR4100 series General-purpose I/O Uint support" 135 depends on CPU_VR41XX 136 help 137 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 138 139config GPIO_SCH 140 tristate "Intel SCH/TunnelCreek GPIO" 141 depends on PCI && X86 142 select MFD_CORE 143 select LPC_SCH 144 help 145 Say yes here to support GPIO interface on Intel Poulsbo SCH 146 or Intel Tunnel Creek processor. 147 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 148 powered by the core power rail and are turned off during sleep 149 modes (S3 and higher). The remaining four GPIOs are powered by 150 the Intel SCH suspend power supply. These GPIOs remain 151 active during S3. The suspend powered GPIOs can be used to wake the 152 system from the Suspend-to-RAM state. 153 The Intel Tunnel Creek processor has 5 GPIOs powered by the 154 core power rail and 9 from suspend power supply. 155 156 This driver can also be built as a module. If so, the module 157 will be called sch-gpio. 158 159config GPIO_VX855 160 tristate "VIA VX855/VX875 GPIO" 161 depends on MFD_SUPPORT && PCI 162 select MFD_CORE 163 select MFD_VX855 164 help 165 Support access to the VX855/VX875 GPIO lines through the gpio library. 166 167 This driver provides common support for accessing the device, 168 additional drivers must be enabled in order to use the 169 functionality of the device. 170 171comment "I2C GPIO expanders:" 172 173config GPIO_MAX7300 174 tristate "Maxim MAX7300 GPIO expander" 175 depends on I2C 176 select GPIO_MAX730X 177 help 178 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 179 180config GPIO_MAX732X 181 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 182 depends on I2C 183 help 184 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 185 Port Expanders. Each IO port on these chips has a fixed role of 186 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 187 Input and Output (designed by 'P'). The combinations are listed 188 below: 189 190 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 191 max7322 (4I4O), max7323 (4P4O) 192 193 16 bits: max7324 (8I8O), max7325 (8P8O), 194 max7326 (4I12O), max7327 (4P12O) 195 196 Board setup code must specify the model to use, and the start 197 number for these GPIOs. 198 199config GPIO_MAX732X_IRQ 200 bool "Interrupt controller support for MAX732x" 201 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 202 help 203 Say yes here to enable the max732x to be used as an interrupt 204 controller. It requires the driver to be built in the kernel. 205 206config GPIO_PCA953X 207 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 208 depends on I2C 209 help 210 Say yes here to provide access to several register-oriented 211 SMBus I/O expanders, made mostly by NXP or TI. Compatible 212 models include: 213 214 4 bits: pca9536, pca9537 215 216 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 217 tca6408 218 219 16 bits: pca9535, pca9539, pca9555, tca6416 220 221 This driver can also be built as a module. If so, the module 222 will be called pca953x. 223 224config GPIO_PCA953X_IRQ 225 bool "Interrupt controller support for PCA953x" 226 depends on GPIO_PCA953X=y 227 help 228 Say yes here to enable the pca953x to be used as an interrupt 229 controller. It requires the driver to be built in the kernel. 230 231config GPIO_PCF857X 232 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 233 depends on I2C 234 help 235 Say yes here to provide access to most "quasi-bidirectional" I2C 236 GPIO expanders used for additional digital outputs or inputs. 237 Most of these parts are from NXP, though TI is a second source for 238 some of them. Compatible models include: 239 240 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 241 pca9670, pca9672, pca9674, pca9674a, 242 max7328, max7329 243 244 16 bits: pcf8575, pcf8575c, pca8575, 245 pca9671, pca9673, pca9675 246 247 Your board setup code will need to declare the expanders in 248 use, and assign numbers to the GPIOs they expose. Those GPIOs 249 can then be used from drivers and other kernel code, just like 250 other GPIOs, but only accessible from task contexts. 251 252 This driver provides an in-kernel interface to those GPIOs using 253 platform-neutral GPIO calls. 254 255config GPIO_SX150X 256 bool "Semtech SX150x I2C GPIO expander" 257 depends on I2C=y 258 default n 259 help 260 Say yes here to provide support for Semtech SX150-series I2C 261 GPIO expanders. Compatible models include: 262 263 8 bits: sx1508q 264 16 bits: sx1509q 265 266config GPIO_STMPE 267 bool "STMPE GPIOs" 268 depends on MFD_STMPE 269 help 270 This enables support for the GPIOs found on the STMPE I/O 271 Expanders. 272 273config GPIO_TC3589X 274 bool "TC3589X GPIOs" 275 depends on MFD_TC3589X 276 help 277 This enables support for the GPIOs found on the TC3589X 278 I/O Expander. 279 280config GPIO_TWL4030 281 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 282 depends on TWL4030_CORE 283 help 284 Say yes here to access the GPIO signals of various multi-function 285 power management chips from Texas Instruments. 286 287config GPIO_WM831X 288 tristate "WM831x GPIOs" 289 depends on MFD_WM831X 290 help 291 Say yes here to access the GPIO signals of WM831x power management 292 chips from Wolfson Microelectronics. 293 294config GPIO_WM8350 295 tristate "WM8350 GPIOs" 296 depends on MFD_WM8350 297 help 298 Say yes here to access the GPIO signals of WM8350 power management 299 chips from Wolfson Microelectronics. 300 301config GPIO_WM8994 302 tristate "WM8994 GPIOs" 303 depends on MFD_WM8994 304 help 305 Say yes here to access the GPIO signals of WM8994 audio hub 306 CODECs from Wolfson Microelectronics. 307 308config GPIO_ADP5520 309 tristate "GPIO Support for ADP5520 PMIC" 310 depends on PMIC_ADP5520 311 help 312 This option enables support for on-chip GPIO found 313 on Analog Devices ADP5520 PMICs. 314 315 To compile this driver as a module, choose M here: the module will 316 be called adp5520-gpio. 317 318config GPIO_ADP5588 319 tristate "ADP5588 I2C GPIO expander" 320 depends on I2C 321 help 322 This option enables support for 18 GPIOs found 323 on Analog Devices ADP5588 GPIO Expanders. 324 To compile this driver as a module, choose M here: the module will be 325 called adp5588-gpio. 326 327config GPIO_ADP5588_IRQ 328 bool "Interrupt controller support for ADP5588" 329 depends on GPIO_ADP5588=y 330 help 331 Say yes here to enable the adp5588 to be used as an interrupt 332 controller. It requires the driver to be built in the kernel. 333 334comment "PCI GPIO expanders:" 335 336config GPIO_CS5535 337 tristate "AMD CS5535/CS5536 GPIO support" 338 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 339 help 340 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 341 can be used for quite a number of things. The CS5535/6 is found on 342 AMD Geode and Lemote Yeeloong devices. 343 344 If unsure, say N. 345 346config GPIO_BT8XX 347 tristate "BT8XX GPIO abuser" 348 depends on PCI && VIDEO_BT848=n 349 help 350 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 351 as a cheap PCI GPIO card. 352 353 This chip can be found on Miro, Hauppauge and STB TV-cards. 354 355 The card needs to be physically altered for using it as a 356 GPIO card. For more information on how to build a GPIO card 357 from a BT8xx TV card, see the documentation file at 358 Documentation/bt8xxgpio.txt 359 360 If unsure, say N. 361 362config GPIO_LANGWELL 363 bool "Intel Langwell/Penwell GPIO support" 364 depends on PCI && X86 365 help 366 Say Y here to support Intel Langwell/Penwell GPIO. 367 368config GPIO_PCH 369 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 370 depends on PCI && X86 371 help 372 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 373 which is an IOH(Input/Output Hub) for x86 embedded processor. 374 This driver can access PCH GPIO device. 375 376 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 377 Output Hub), ML7223. 378 ML7223 IOH is for MP(Media Phone) use. 379 ML7223 is companion chip for Intel Atom E6xx series. 380 ML7223 is completely compatible for Intel EG20T PCH. 381 382config GPIO_ML_IOH 383 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 384 depends on PCI 385 help 386 ML7213 is companion chip for Intel Atom E6xx series. 387 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 388 Hub) which is for IVI(In-Vehicle Infotainment) use. 389 This driver can access the IOH's GPIO device. 390 391config GPIO_TIMBERDALE 392 bool "Support for timberdale GPIO IP" 393 depends on MFD_TIMBERDALE && HAS_IOMEM 394 ---help--- 395 Add support for the GPIO IP in the timberdale FPGA. 396 397config GPIO_RDC321X 398 tristate "RDC R-321x GPIO support" 399 depends on PCI 400 select MFD_SUPPORT 401 select MFD_CORE 402 select MFD_RDC321X 403 help 404 Support for the RDC R321x SoC GPIOs over southbridge 405 PCI configuration space. 406 407comment "SPI GPIO expanders:" 408 409config GPIO_MAX7301 410 tristate "Maxim MAX7301 GPIO expander" 411 depends on SPI_MASTER 412 select GPIO_MAX730X 413 help 414 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 415 416config GPIO_MCP23S08 417 tristate "Microchip MCP23Sxx I/O expander" 418 depends on SPI_MASTER 419 help 420 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 421 This provides a GPIO interface supporting inputs and outputs. 422 423config GPIO_MC33880 424 tristate "Freescale MC33880 high-side/low-side switch" 425 depends on SPI_MASTER 426 help 427 SPI driver for Freescale MC33880 high-side/low-side switch. 428 This provides GPIO interface supporting inputs and outputs. 429 430config GPIO_74X164 431 tristate "74x164 serial-in/parallel-out 8-bits shift register" 432 depends on SPI_MASTER 433 help 434 Platform driver for 74x164 compatible serial-in/parallel-out 435 8-outputs shift registers. This driver can be used to provide access 436 to more gpio outputs. 437 438comment "AC97 GPIO expanders:" 439 440config GPIO_UCB1400 441 bool "Philips UCB1400 GPIO" 442 depends on UCB1400_CORE 443 help 444 This enables support for the Philips UCB1400 GPIO pins. 445 The UCB1400 is an AC97 audio codec. 446 447 To compile this driver as a module, choose M here: the 448 module will be called ucb1400_gpio. 449 450comment "MODULbus GPIO expanders:" 451 452config GPIO_JANZ_TTL 453 tristate "Janz VMOD-TTL Digital IO Module" 454 depends on MFD_JANZ_CMODIO 455 help 456 This enables support for the Janz VMOD-TTL Digital IO module. 457 This driver provides support for driving the pins in output 458 mode only. Input mode is not supported. 459 460config AB8500_GPIO 461 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 462 depends on AB8500_CORE && BROKEN 463 help 464 Select this to enable the AB8500 IC GPIO driver 465 466config GPIO_TPS65910 467 bool "TPS65910 GPIO" 468 depends on MFD_TPS65910 469 help 470 Select this option to enable GPIO driver for the TPS65910 471 chip family. 472endif 473