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 66config GPIO_GENERIC 67 tristate 68 69# put drivers in the right section, in alphabetical order 70 71config GPIO_DA9052 72 tristate "Dialog DA9052 GPIO" 73 depends on PMIC_DA9052 74 help 75 Say yes here to enable the GPIO driver for the DA9052 chip. 76 77config GPIO_MAX730X 78 tristate 79 80comment "Memory mapped GPIO drivers:" 81 82config GPIO_GENERIC_PLATFORM 83 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)" 84 select GPIO_GENERIC 85 help 86 Say yes here to support basic platform_device memory-mapped GPIO controllers. 87 88config GPIO_IT8761E 89 tristate "IT8761E GPIO support" 90 help 91 Say yes here to support GPIO functionality of IT8761E super I/O chip. 92 93config GPIO_EP93XX 94 def_bool y 95 depends on ARCH_EP93XX 96 select GPIO_GENERIC 97 98config GPIO_EXYNOS4 99 def_bool y 100 depends on CPU_EXYNOS4210 101 102config GPIO_MPC5200 103 def_bool y 104 depends on PPC_MPC52xx 105 106config GPIO_MXC 107 def_bool y 108 depends on ARCH_MXC 109 select GPIO_GENERIC 110 select GENERIC_IRQ_CHIP 111 112config GPIO_MXS 113 def_bool y 114 depends on ARCH_MXS 115 select GPIO_GENERIC 116 select GENERIC_IRQ_CHIP 117 118config GPIO_PLAT_SAMSUNG 119 def_bool y 120 depends on SAMSUNG_GPIOLIB_4BIT 121 122config GPIO_S5PC100 123 def_bool y 124 depends on CPU_S5PC100 125 126config GPIO_S5PV210 127 def_bool y 128 depends on CPU_S5PV210 129 130config GPIO_PL061 131 bool "PrimeCell PL061 GPIO support" 132 depends on ARM_AMBA 133 help 134 Say yes here to support the PrimeCell PL061 GPIO device 135 136config GPIO_XILINX 137 bool "Xilinx GPIO support" 138 depends on PPC_OF || MICROBLAZE 139 help 140 Say yes here to support the Xilinx FPGA GPIO device 141 142config GPIO_VR41XX 143 tristate "NEC VR4100 series General-purpose I/O Uint support" 144 depends on CPU_VR41XX 145 help 146 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 147 148config GPIO_SCH 149 tristate "Intel SCH/TunnelCreek GPIO" 150 depends on PCI && X86 151 select MFD_CORE 152 select LPC_SCH 153 help 154 Say yes here to support GPIO interface on Intel Poulsbo SCH 155 or Intel Tunnel Creek processor. 156 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 157 powered by the core power rail and are turned off during sleep 158 modes (S3 and higher). The remaining four GPIOs are powered by 159 the Intel SCH suspend power supply. These GPIOs remain 160 active during S3. The suspend powered GPIOs can be used to wake the 161 system from the Suspend-to-RAM state. 162 The Intel Tunnel Creek processor has 5 GPIOs powered by the 163 core power rail and 9 from suspend power supply. 164 165config GPIO_VX855 166 tristate "VIA VX855/VX875 GPIO" 167 depends on MFD_SUPPORT && PCI 168 select MFD_CORE 169 select MFD_VX855 170 help 171 Support access to the VX855/VX875 GPIO lines through the gpio library. 172 173 This driver provides common support for accessing the device, 174 additional drivers must be enabled in order to use the 175 functionality of the device. 176 177comment "I2C GPIO expanders:" 178 179config GPIO_MAX7300 180 tristate "Maxim MAX7300 GPIO expander" 181 depends on I2C 182 select GPIO_MAX730X 183 help 184 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 185 186config GPIO_MAX732X 187 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 188 depends on I2C 189 help 190 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 191 Port Expanders. Each IO port on these chips has a fixed role of 192 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 193 Input and Output (designed by 'P'). The combinations are listed 194 below: 195 196 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 197 max7322 (4I4O), max7323 (4P4O) 198 199 16 bits: max7324 (8I8O), max7325 (8P8O), 200 max7326 (4I12O), max7327 (4P12O) 201 202 Board setup code must specify the model to use, and the start 203 number for these GPIOs. 204 205config GPIO_MAX732X_IRQ 206 bool "Interrupt controller support for MAX732x" 207 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 208 help 209 Say yes here to enable the max732x to be used as an interrupt 210 controller. It requires the driver to be built in the kernel. 211 212config GPIO_PCA953X 213 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 214 depends on I2C 215 help 216 Say yes here to provide access to several register-oriented 217 SMBus I/O expanders, made mostly by NXP or TI. Compatible 218 models include: 219 220 4 bits: pca9536, pca9537 221 222 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 223 tca6408 224 225 16 bits: pca9535, pca9539, pca9555, tca6416 226 227config GPIO_PCA953X_IRQ 228 bool "Interrupt controller support for PCA953x" 229 depends on GPIO_PCA953X=y 230 help 231 Say yes here to enable the pca953x to be used as an interrupt 232 controller. It requires the driver to be built in the kernel. 233 234config GPIO_PCF857X 235 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 236 depends on I2C 237 help 238 Say yes here to provide access to most "quasi-bidirectional" I2C 239 GPIO expanders used for additional digital outputs or inputs. 240 Most of these parts are from NXP, though TI is a second source for 241 some of them. Compatible models include: 242 243 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 244 pca9670, pca9672, pca9674, pca9674a, 245 max7328, max7329 246 247 16 bits: pcf8575, pcf8575c, pca8575, 248 pca9671, pca9673, pca9675 249 250 Your board setup code will need to declare the expanders in 251 use, and assign numbers to the GPIOs they expose. Those GPIOs 252 can then be used from drivers and other kernel code, just like 253 other GPIOs, but only accessible from task contexts. 254 255 This driver provides an in-kernel interface to those GPIOs using 256 platform-neutral GPIO calls. 257 258config GPIO_SX150X 259 bool "Semtech SX150x I2C GPIO expander" 260 depends on I2C=y 261 default n 262 help 263 Say yes here to provide support for Semtech SX150-series I2C 264 GPIO expanders. Compatible models include: 265 266 8 bits: sx1508q 267 16 bits: sx1509q 268 269config GPIO_STMPE 270 bool "STMPE GPIOs" 271 depends on MFD_STMPE 272 help 273 This enables support for the GPIOs found on the STMPE I/O 274 Expanders. 275 276config GPIO_TC3589X 277 bool "TC3589X GPIOs" 278 depends on MFD_TC3589X 279 help 280 This enables support for the GPIOs found on the TC3589X 281 I/O Expander. 282 283config GPIO_TWL4030 284 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 285 depends on TWL4030_CORE 286 help 287 Say yes here to access the GPIO signals of various multi-function 288 power management chips from Texas Instruments. 289 290config GPIO_WM831X 291 tristate "WM831x GPIOs" 292 depends on MFD_WM831X 293 help 294 Say yes here to access the GPIO signals of WM831x power management 295 chips from Wolfson Microelectronics. 296 297config GPIO_WM8350 298 tristate "WM8350 GPIOs" 299 depends on MFD_WM8350 300 help 301 Say yes here to access the GPIO signals of WM8350 power management 302 chips from Wolfson Microelectronics. 303 304config GPIO_WM8994 305 tristate "WM8994 GPIOs" 306 depends on MFD_WM8994 307 help 308 Say yes here to access the GPIO signals of WM8994 audio hub 309 CODECs from Wolfson Microelectronics. 310 311config GPIO_ADP5520 312 tristate "GPIO Support for ADP5520 PMIC" 313 depends on PMIC_ADP5520 314 help 315 This option enables support for on-chip GPIO found 316 on Analog Devices ADP5520 PMICs. 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 325config GPIO_ADP5588_IRQ 326 bool "Interrupt controller support for ADP5588" 327 depends on GPIO_ADP5588=y 328 help 329 Say yes here to enable the adp5588 to be used as an interrupt 330 controller. It requires the driver to be built in the kernel. 331 332comment "PCI GPIO expanders:" 333 334config GPIO_CS5535 335 tristate "AMD CS5535/CS5536 GPIO support" 336 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 337 help 338 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 339 can be used for quite a number of things. The CS5535/6 is found on 340 AMD Geode and Lemote Yeeloong devices. 341 342 If unsure, say N. 343 344config GPIO_BT8XX 345 tristate "BT8XX GPIO abuser" 346 depends on PCI && VIDEO_BT848=n 347 help 348 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 349 as a cheap PCI GPIO card. 350 351 This chip can be found on Miro, Hauppauge and STB TV-cards. 352 353 The card needs to be physically altered for using it as a 354 GPIO card. For more information on how to build a GPIO card 355 from a BT8xx TV card, see the documentation file at 356 Documentation/bt8xxgpio.txt 357 358 If unsure, say N. 359 360config GPIO_LANGWELL 361 bool "Intel Langwell/Penwell GPIO support" 362 depends on PCI && X86 363 help 364 Say Y here to support Intel Langwell/Penwell GPIO. 365 366config GPIO_PCH 367 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 368 depends on PCI && X86 369 help 370 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 371 which is an IOH(Input/Output Hub) for x86 embedded processor. 372 This driver can access PCH GPIO device. 373 374 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 375 Output Hub), ML7223. 376 ML7223 IOH is for MP(Media Phone) use. 377 ML7223 is companion chip for Intel Atom E6xx series. 378 ML7223 is completely compatible for Intel EG20T PCH. 379 380config GPIO_ML_IOH 381 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 382 depends on PCI 383 help 384 ML7213 is companion chip for Intel Atom E6xx series. 385 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 386 Hub) which is for IVI(In-Vehicle Infotainment) use. 387 This driver can access the IOH's GPIO device. 388 389config GPIO_TIMBERDALE 390 bool "Support for timberdale GPIO IP" 391 depends on MFD_TIMBERDALE && HAS_IOMEM 392 ---help--- 393 Add support for the GPIO IP in the timberdale FPGA. 394 395config GPIO_RDC321X 396 tristate "RDC R-321x GPIO support" 397 depends on PCI 398 select MFD_SUPPORT 399 select MFD_CORE 400 select MFD_RDC321X 401 help 402 Support for the RDC R321x SoC GPIOs over southbridge 403 PCI configuration space. 404 405comment "SPI GPIO expanders:" 406 407config GPIO_MAX7301 408 tristate "Maxim MAX7301 GPIO expander" 409 depends on SPI_MASTER 410 select GPIO_MAX730X 411 help 412 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 413 414config GPIO_MCP23S08 415 tristate "Microchip MCP23xxx I/O expander" 416 depends on SPI_MASTER || I2C 417 help 418 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 419 I/O expanders. 420 This provides a GPIO interface supporting inputs and outputs. 421 422config GPIO_MC33880 423 tristate "Freescale MC33880 high-side/low-side switch" 424 depends on SPI_MASTER 425 help 426 SPI driver for Freescale MC33880 high-side/low-side switch. 427 This provides GPIO interface supporting inputs and outputs. 428 429config GPIO_74X164 430 tristate "74x164 serial-in/parallel-out 8-bits shift register" 431 depends on SPI_MASTER 432 help 433 Platform driver for 74x164 compatible serial-in/parallel-out 434 8-outputs shift registers. This driver can be used to provide access 435 to more gpio outputs. 436 437comment "AC97 GPIO expanders:" 438 439config GPIO_UCB1400 440 bool "Philips UCB1400 GPIO" 441 depends on UCB1400_CORE 442 help 443 This enables support for the Philips UCB1400 GPIO pins. 444 The UCB1400 is an AC97 audio codec. 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 GPIO_AB8500 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