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_MXC 103 def_bool y 104 depends on ARCH_MXC 105 select GPIO_GENERIC 106 select GENERIC_IRQ_CHIP 107 108config GPIO_MXS 109 def_bool y 110 depends on ARCH_MXS 111 select GPIO_GENERIC 112 select GENERIC_IRQ_CHIP 113 114config GPIO_PLAT_SAMSUNG 115 def_bool y 116 depends on SAMSUNG_GPIOLIB_4BIT 117 118config GPIO_S5PC100 119 def_bool y 120 depends on CPU_S5PC100 121 122config GPIO_S5PV210 123 def_bool y 124 depends on CPU_S5PV210 125 126config GPIO_PL061 127 bool "PrimeCell PL061 GPIO support" 128 depends on ARM_AMBA 129 help 130 Say yes here to support the PrimeCell PL061 GPIO device 131 132config GPIO_XILINX 133 bool "Xilinx GPIO support" 134 depends on PPC_OF || MICROBLAZE 135 help 136 Say yes here to support the Xilinx FPGA GPIO device 137 138config GPIO_VR41XX 139 tristate "NEC VR4100 series General-purpose I/O Uint support" 140 depends on CPU_VR41XX 141 help 142 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 143 144config GPIO_SCH 145 tristate "Intel SCH/TunnelCreek GPIO" 146 depends on PCI && X86 147 select MFD_CORE 148 select LPC_SCH 149 help 150 Say yes here to support GPIO interface on Intel Poulsbo SCH 151 or Intel Tunnel Creek processor. 152 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 153 powered by the core power rail and are turned off during sleep 154 modes (S3 and higher). The remaining four GPIOs are powered by 155 the Intel SCH suspend power supply. These GPIOs remain 156 active during S3. The suspend powered GPIOs can be used to wake the 157 system from the Suspend-to-RAM state. 158 The Intel Tunnel Creek processor has 5 GPIOs powered by the 159 core power rail and 9 from suspend power supply. 160 161config GPIO_VX855 162 tristate "VIA VX855/VX875 GPIO" 163 depends on MFD_SUPPORT && PCI 164 select MFD_CORE 165 select MFD_VX855 166 help 167 Support access to the VX855/VX875 GPIO lines through the gpio library. 168 169 This driver provides common support for accessing the device, 170 additional drivers must be enabled in order to use the 171 functionality of the device. 172 173comment "I2C GPIO expanders:" 174 175config GPIO_MAX7300 176 tristate "Maxim MAX7300 GPIO expander" 177 depends on I2C 178 select GPIO_MAX730X 179 help 180 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 181 182config GPIO_MAX732X 183 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 184 depends on I2C 185 help 186 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 187 Port Expanders. Each IO port on these chips has a fixed role of 188 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 189 Input and Output (designed by 'P'). The combinations are listed 190 below: 191 192 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 193 max7322 (4I4O), max7323 (4P4O) 194 195 16 bits: max7324 (8I8O), max7325 (8P8O), 196 max7326 (4I12O), max7327 (4P12O) 197 198 Board setup code must specify the model to use, and the start 199 number for these GPIOs. 200 201config GPIO_MAX732X_IRQ 202 bool "Interrupt controller support for MAX732x" 203 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 204 help 205 Say yes here to enable the max732x to be used as an interrupt 206 controller. It requires the driver to be built in the kernel. 207 208config GPIO_PCA953X 209 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 210 depends on I2C 211 help 212 Say yes here to provide access to several register-oriented 213 SMBus I/O expanders, made mostly by NXP or TI. Compatible 214 models include: 215 216 4 bits: pca9536, pca9537 217 218 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 219 tca6408 220 221 16 bits: pca9535, pca9539, pca9555, tca6416 222 223config GPIO_PCA953X_IRQ 224 bool "Interrupt controller support for PCA953x" 225 depends on GPIO_PCA953X=y 226 help 227 Say yes here to enable the pca953x to be used as an interrupt 228 controller. It requires the driver to be built in the kernel. 229 230config GPIO_PCF857X 231 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 232 depends on I2C 233 help 234 Say yes here to provide access to most "quasi-bidirectional" I2C 235 GPIO expanders used for additional digital outputs or inputs. 236 Most of these parts are from NXP, though TI is a second source for 237 some of them. Compatible models include: 238 239 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 240 pca9670, pca9672, pca9674, pca9674a, 241 max7328, max7329 242 243 16 bits: pcf8575, pcf8575c, pca8575, 244 pca9671, pca9673, pca9675 245 246 Your board setup code will need to declare the expanders in 247 use, and assign numbers to the GPIOs they expose. Those GPIOs 248 can then be used from drivers and other kernel code, just like 249 other GPIOs, but only accessible from task contexts. 250 251 This driver provides an in-kernel interface to those GPIOs using 252 platform-neutral GPIO calls. 253 254config GPIO_SX150X 255 bool "Semtech SX150x I2C GPIO expander" 256 depends on I2C=y 257 default n 258 help 259 Say yes here to provide support for Semtech SX150-series I2C 260 GPIO expanders. Compatible models include: 261 262 8 bits: sx1508q 263 16 bits: sx1509q 264 265config GPIO_STMPE 266 bool "STMPE GPIOs" 267 depends on MFD_STMPE 268 help 269 This enables support for the GPIOs found on the STMPE I/O 270 Expanders. 271 272config GPIO_TC3589X 273 bool "TC3589X GPIOs" 274 depends on MFD_TC3589X 275 help 276 This enables support for the GPIOs found on the TC3589X 277 I/O Expander. 278 279config GPIO_TWL4030 280 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 281 depends on TWL4030_CORE 282 help 283 Say yes here to access the GPIO signals of various multi-function 284 power management chips from Texas Instruments. 285 286config GPIO_WM831X 287 tristate "WM831x GPIOs" 288 depends on MFD_WM831X 289 help 290 Say yes here to access the GPIO signals of WM831x power management 291 chips from Wolfson Microelectronics. 292 293config GPIO_WM8350 294 tristate "WM8350 GPIOs" 295 depends on MFD_WM8350 296 help 297 Say yes here to access the GPIO signals of WM8350 power management 298 chips from Wolfson Microelectronics. 299 300config GPIO_WM8994 301 tristate "WM8994 GPIOs" 302 depends on MFD_WM8994 303 help 304 Say yes here to access the GPIO signals of WM8994 audio hub 305 CODECs from Wolfson Microelectronics. 306 307config GPIO_ADP5520 308 tristate "GPIO Support for ADP5520 PMIC" 309 depends on PMIC_ADP5520 310 help 311 This option enables support for on-chip GPIO found 312 on Analog Devices ADP5520 PMICs. 313 314config GPIO_ADP5588 315 tristate "ADP5588 I2C GPIO expander" 316 depends on I2C 317 help 318 This option enables support for 18 GPIOs found 319 on Analog Devices ADP5588 GPIO Expanders. 320 321config GPIO_ADP5588_IRQ 322 bool "Interrupt controller support for ADP5588" 323 depends on GPIO_ADP5588=y 324 help 325 Say yes here to enable the adp5588 to be used as an interrupt 326 controller. It requires the driver to be built in the kernel. 327 328comment "PCI GPIO expanders:" 329 330config GPIO_CS5535 331 tristate "AMD CS5535/CS5536 GPIO support" 332 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 333 help 334 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 335 can be used for quite a number of things. The CS5535/6 is found on 336 AMD Geode and Lemote Yeeloong devices. 337 338 If unsure, say N. 339 340config GPIO_BT8XX 341 tristate "BT8XX GPIO abuser" 342 depends on PCI && VIDEO_BT848=n 343 help 344 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 345 as a cheap PCI GPIO card. 346 347 This chip can be found on Miro, Hauppauge and STB TV-cards. 348 349 The card needs to be physically altered for using it as a 350 GPIO card. For more information on how to build a GPIO card 351 from a BT8xx TV card, see the documentation file at 352 Documentation/bt8xxgpio.txt 353 354 If unsure, say N. 355 356config GPIO_LANGWELL 357 bool "Intel Langwell/Penwell GPIO support" 358 depends on PCI && X86 359 help 360 Say Y here to support Intel Langwell/Penwell GPIO. 361 362config GPIO_PCH 363 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 364 depends on PCI && X86 365 help 366 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 367 which is an IOH(Input/Output Hub) for x86 embedded processor. 368 This driver can access PCH GPIO device. 369 370 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 371 Output Hub), ML7223. 372 ML7223 IOH is for MP(Media Phone) use. 373 ML7223 is companion chip for Intel Atom E6xx series. 374 ML7223 is completely compatible for Intel EG20T PCH. 375 376config GPIO_ML_IOH 377 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 378 depends on PCI 379 help 380 ML7213 is companion chip for Intel Atom E6xx series. 381 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 382 Hub) which is for IVI(In-Vehicle Infotainment) use. 383 This driver can access the IOH's GPIO device. 384 385config GPIO_TIMBERDALE 386 bool "Support for timberdale GPIO IP" 387 depends on MFD_TIMBERDALE && HAS_IOMEM 388 ---help--- 389 Add support for the GPIO IP in the timberdale FPGA. 390 391config GPIO_RDC321X 392 tristate "RDC R-321x GPIO support" 393 depends on PCI 394 select MFD_SUPPORT 395 select MFD_CORE 396 select MFD_RDC321X 397 help 398 Support for the RDC R321x SoC GPIOs over southbridge 399 PCI configuration space. 400 401comment "SPI GPIO expanders:" 402 403config GPIO_MAX7301 404 tristate "Maxim MAX7301 GPIO expander" 405 depends on SPI_MASTER 406 select GPIO_MAX730X 407 help 408 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 409 410config GPIO_MCP23S08 411 tristate "Microchip MCP23Sxx I/O expander" 412 depends on SPI_MASTER 413 help 414 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 415 This provides a GPIO interface supporting inputs and outputs. 416 417config GPIO_MC33880 418 tristate "Freescale MC33880 high-side/low-side switch" 419 depends on SPI_MASTER 420 help 421 SPI driver for Freescale MC33880 high-side/low-side switch. 422 This provides GPIO interface supporting inputs and outputs. 423 424config GPIO_74X164 425 tristate "74x164 serial-in/parallel-out 8-bits shift register" 426 depends on SPI_MASTER 427 help 428 Platform driver for 74x164 compatible serial-in/parallel-out 429 8-outputs shift registers. This driver can be used to provide access 430 to more gpio outputs. 431 432comment "AC97 GPIO expanders:" 433 434config GPIO_UCB1400 435 bool "Philips UCB1400 GPIO" 436 depends on UCB1400_CORE 437 help 438 This enables support for the Philips UCB1400 GPIO pins. 439 The UCB1400 is an AC97 audio codec. 440 441comment "MODULbus GPIO expanders:" 442 443config GPIO_JANZ_TTL 444 tristate "Janz VMOD-TTL Digital IO Module" 445 depends on MFD_JANZ_CMODIO 446 help 447 This enables support for the Janz VMOD-TTL Digital IO module. 448 This driver provides support for driving the pins in output 449 mode only. Input mode is not supported. 450 451config GPIO_AB8500 452 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 453 depends on AB8500_CORE && BROKEN 454 help 455 Select this to enable the AB8500 IC GPIO driver 456 457config GPIO_TPS65910 458 bool "TPS65910 GPIO" 459 depends on MFD_TPS65910 460 help 461 Select this option to enable GPIO driver for the TPS65910 462 chip family. 463endif 464