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_MPC5200 99 def_bool y 100 depends on PPC_MPC52xx 101 102config GPIO_MSM_V1 103 tristate "Qualcomm MSM GPIO v1" 104 depends on GPIOLIB && ARCH_MSM 105 help 106 Say yes here to support the GPIO interface on ARM v6 based 107 Qualcomm MSM chips. Most of the pins on the MSM can be 108 selected for GPIO, and are controlled by this driver. 109 110config GPIO_MSM_V2 111 tristate "Qualcomm MSM GPIO v2" 112 depends on GPIOLIB && ARCH_MSM 113 help 114 Say yes here to support the GPIO interface on ARM v7 based 115 Qualcomm MSM chips. Most of the pins on the MSM can be 116 selected for GPIO, and are controlled by this driver. 117 118config GPIO_MXC 119 def_bool y 120 depends on ARCH_MXC 121 select GPIO_GENERIC 122 select GENERIC_IRQ_CHIP 123 124config GPIO_MXS 125 def_bool y 126 depends on ARCH_MXS 127 select GPIO_GENERIC 128 select GENERIC_IRQ_CHIP 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_TPS65912 284 tristate "TI TPS65912 GPIO" 285 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 286 help 287 This driver supports TPS65912 gpio chip 288 289config GPIO_TWL4030 290 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 291 depends on TWL4030_CORE 292 help 293 Say yes here to access the GPIO signals of various multi-function 294 power management chips from Texas Instruments. 295 296config GPIO_WM831X 297 tristate "WM831x GPIOs" 298 depends on MFD_WM831X 299 help 300 Say yes here to access the GPIO signals of WM831x power management 301 chips from Wolfson Microelectronics. 302 303config GPIO_WM8350 304 tristate "WM8350 GPIOs" 305 depends on MFD_WM8350 306 help 307 Say yes here to access the GPIO signals of WM8350 power management 308 chips from Wolfson Microelectronics. 309 310config GPIO_WM8994 311 tristate "WM8994 GPIOs" 312 depends on MFD_WM8994 313 help 314 Say yes here to access the GPIO signals of WM8994 audio hub 315 CODECs from Wolfson Microelectronics. 316 317config GPIO_ADP5520 318 tristate "GPIO Support for ADP5520 PMIC" 319 depends on PMIC_ADP5520 320 help 321 This option enables support for on-chip GPIO found 322 on Analog Devices ADP5520 PMICs. 323 324config GPIO_ADP5588 325 tristate "ADP5588 I2C GPIO expander" 326 depends on I2C 327 help 328 This option enables support for 18 GPIOs found 329 on Analog Devices ADP5588 GPIO Expanders. 330 331config GPIO_ADP5588_IRQ 332 bool "Interrupt controller support for ADP5588" 333 depends on GPIO_ADP5588=y 334 help 335 Say yes here to enable the adp5588 to be used as an interrupt 336 controller. It requires the driver to be built in the kernel. 337 338comment "PCI GPIO expanders:" 339 340config GPIO_CS5535 341 tristate "AMD CS5535/CS5536 GPIO support" 342 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 343 help 344 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 345 can be used for quite a number of things. The CS5535/6 is found on 346 AMD Geode and Lemote Yeeloong devices. 347 348 If unsure, say N. 349 350config GPIO_BT8XX 351 tristate "BT8XX GPIO abuser" 352 depends on PCI && VIDEO_BT848=n 353 help 354 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 355 as a cheap PCI GPIO card. 356 357 This chip can be found on Miro, Hauppauge and STB TV-cards. 358 359 The card needs to be physically altered for using it as a 360 GPIO card. For more information on how to build a GPIO card 361 from a BT8xx TV card, see the documentation file at 362 Documentation/bt8xxgpio.txt 363 364 If unsure, say N. 365 366config GPIO_LANGWELL 367 bool "Intel Langwell/Penwell GPIO support" 368 depends on PCI && X86 369 help 370 Say Y here to support Intel Langwell/Penwell GPIO. 371 372config GPIO_PCH 373 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 374 depends on PCI && X86 375 help 376 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 377 which is an IOH(Input/Output Hub) for x86 embedded processor. 378 This driver can access PCH GPIO device. 379 380 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 381 Output Hub), ML7223. 382 ML7223 IOH is for MP(Media Phone) use. 383 ML7223 is companion chip for Intel Atom E6xx series. 384 ML7223 is completely compatible for Intel EG20T PCH. 385 386config GPIO_ML_IOH 387 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 388 depends on PCI 389 help 390 ML7213 is companion chip for Intel Atom E6xx series. 391 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 392 Hub) which is for IVI(In-Vehicle Infotainment) use. 393 This driver can access the IOH's GPIO device. 394 395config GPIO_TIMBERDALE 396 bool "Support for timberdale GPIO IP" 397 depends on MFD_TIMBERDALE && HAS_IOMEM 398 ---help--- 399 Add support for the GPIO IP in the timberdale FPGA. 400 401config GPIO_RDC321X 402 tristate "RDC R-321x GPIO support" 403 depends on PCI 404 select MFD_SUPPORT 405 select MFD_CORE 406 select MFD_RDC321X 407 help 408 Support for the RDC R321x SoC GPIOs over southbridge 409 PCI configuration space. 410 411comment "SPI GPIO expanders:" 412 413config GPIO_MAX7301 414 tristate "Maxim MAX7301 GPIO expander" 415 depends on SPI_MASTER 416 select GPIO_MAX730X 417 help 418 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 419 420config GPIO_MCP23S08 421 tristate "Microchip MCP23xxx I/O expander" 422 depends on SPI_MASTER || I2C 423 help 424 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 425 I/O expanders. 426 This provides a GPIO interface supporting inputs and outputs. 427 428config GPIO_MC33880 429 tristate "Freescale MC33880 high-side/low-side switch" 430 depends on SPI_MASTER 431 help 432 SPI driver for Freescale MC33880 high-side/low-side switch. 433 This provides GPIO interface supporting inputs and outputs. 434 435config GPIO_74X164 436 tristate "74x164 serial-in/parallel-out 8-bits shift register" 437 depends on SPI_MASTER 438 help 439 Platform driver for 74x164 compatible serial-in/parallel-out 440 8-outputs shift registers. This driver can be used to provide access 441 to more gpio outputs. 442 443comment "AC97 GPIO expanders:" 444 445config GPIO_UCB1400 446 bool "Philips UCB1400 GPIO" 447 depends on UCB1400_CORE 448 help 449 This enables support for the Philips UCB1400 GPIO pins. 450 The UCB1400 is an AC97 audio codec. 451 452comment "MODULbus GPIO expanders:" 453 454config GPIO_JANZ_TTL 455 tristate "Janz VMOD-TTL Digital IO Module" 456 depends on MFD_JANZ_CMODIO 457 help 458 This enables support for the Janz VMOD-TTL Digital IO module. 459 This driver provides support for driving the pins in output 460 mode only. Input mode is not supported. 461 462config GPIO_AB8500 463 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 464 depends on AB8500_CORE && BROKEN 465 help 466 Select this to enable the AB8500 IC GPIO driver 467 468config GPIO_TPS65910 469 bool "TPS65910 GPIO" 470 depends on MFD_TPS65910 471 help 472 Select this option to enable GPIO driver for the TPS65910 473 chip family. 474endif 475