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_MSM_V1 107 tristate "Qualcomm MSM GPIO v1" 108 depends on GPIOLIB && ARCH_MSM 109 help 110 Say yes here to support the GPIO interface on ARM v6 based 111 Qualcomm MSM chips. Most of the pins on the MSM can be 112 selected for GPIO, and are controlled by this driver. 113 114config GPIO_MSM_V2 115 tristate "Qualcomm MSM GPIO v2" 116 depends on GPIOLIB && ARCH_MSM 117 help 118 Say yes here to support the GPIO interface on ARM v7 based 119 Qualcomm MSM chips. Most of the pins on the MSM can be 120 selected for GPIO, and are controlled by this driver. 121 122config GPIO_MXC 123 def_bool y 124 depends on ARCH_MXC 125 select GPIO_GENERIC 126 select GENERIC_IRQ_CHIP 127 128config GPIO_MXS 129 def_bool y 130 depends on ARCH_MXS 131 select GPIO_GENERIC 132 select GENERIC_IRQ_CHIP 133 134config GPIO_PLAT_SAMSUNG 135 def_bool y 136 depends on SAMSUNG_GPIOLIB_4BIT 137 138config GPIO_S5PC100 139 def_bool y 140 depends on CPU_S5PC100 141 142config GPIO_S5PV210 143 def_bool y 144 depends on CPU_S5PV210 145 146config GPIO_PL061 147 bool "PrimeCell PL061 GPIO support" 148 depends on ARM_AMBA 149 help 150 Say yes here to support the PrimeCell PL061 GPIO device 151 152config GPIO_XILINX 153 bool "Xilinx GPIO support" 154 depends on PPC_OF || MICROBLAZE 155 help 156 Say yes here to support the Xilinx FPGA GPIO device 157 158config GPIO_VR41XX 159 tristate "NEC VR4100 series General-purpose I/O Uint support" 160 depends on CPU_VR41XX 161 help 162 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 163 164config GPIO_SCH 165 tristate "Intel SCH/TunnelCreek GPIO" 166 depends on PCI && X86 167 select MFD_CORE 168 select LPC_SCH 169 help 170 Say yes here to support GPIO interface on Intel Poulsbo SCH 171 or Intel Tunnel Creek processor. 172 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 173 powered by the core power rail and are turned off during sleep 174 modes (S3 and higher). The remaining four GPIOs are powered by 175 the Intel SCH suspend power supply. These GPIOs remain 176 active during S3. The suspend powered GPIOs can be used to wake the 177 system from the Suspend-to-RAM state. 178 The Intel Tunnel Creek processor has 5 GPIOs powered by the 179 core power rail and 9 from suspend power supply. 180 181config GPIO_U300 182 bool "ST-Ericsson U300 COH 901 335/571 GPIO" 183 depends on GPIOLIB && ARCH_U300 184 help 185 Say yes here to support GPIO interface on ST-Ericsson U300. 186 The names of the two IP block variants supported are 187 COH 901 335 and COH 901 571/3. They contain 3, 5 or 7 188 ports of 8 GPIO pins each. 189 190config GPIO_VX855 191 tristate "VIA VX855/VX875 GPIO" 192 depends on MFD_SUPPORT && PCI 193 select MFD_CORE 194 select MFD_VX855 195 help 196 Support access to the VX855/VX875 GPIO lines through the gpio library. 197 198 This driver provides common support for accessing the device, 199 additional drivers must be enabled in order to use the 200 functionality of the device. 201 202comment "I2C GPIO expanders:" 203 204config GPIO_MAX7300 205 tristate "Maxim MAX7300 GPIO expander" 206 depends on I2C 207 select GPIO_MAX730X 208 help 209 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 210 211config GPIO_MAX732X 212 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 213 depends on I2C 214 help 215 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 216 Port Expanders. Each IO port on these chips has a fixed role of 217 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 218 Input and Output (designed by 'P'). The combinations are listed 219 below: 220 221 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 222 max7322 (4I4O), max7323 (4P4O) 223 224 16 bits: max7324 (8I8O), max7325 (8P8O), 225 max7326 (4I12O), max7327 (4P12O) 226 227 Board setup code must specify the model to use, and the start 228 number for these GPIOs. 229 230config GPIO_MAX732X_IRQ 231 bool "Interrupt controller support for MAX732x" 232 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 233 help 234 Say yes here to enable the max732x to be used as an interrupt 235 controller. It requires the driver to be built in the kernel. 236 237config GPIO_PCA953X 238 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 239 depends on I2C 240 help 241 Say yes here to provide access to several register-oriented 242 SMBus I/O expanders, made mostly by NXP or TI. Compatible 243 models include: 244 245 4 bits: pca9536, pca9537 246 247 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 248 tca6408 249 250 16 bits: pca9535, pca9539, pca9555, tca6416 251 252config GPIO_PCA953X_IRQ 253 bool "Interrupt controller support for PCA953x" 254 depends on GPIO_PCA953X=y 255 help 256 Say yes here to enable the pca953x to be used as an interrupt 257 controller. It requires the driver to be built in the kernel. 258 259config GPIO_PCF857X 260 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 261 depends on I2C 262 help 263 Say yes here to provide access to most "quasi-bidirectional" I2C 264 GPIO expanders used for additional digital outputs or inputs. 265 Most of these parts are from NXP, though TI is a second source for 266 some of them. Compatible models include: 267 268 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 269 pca9670, pca9672, pca9674, pca9674a, 270 max7328, max7329 271 272 16 bits: pcf8575, pcf8575c, pca8575, 273 pca9671, pca9673, pca9675 274 275 Your board setup code will need to declare the expanders in 276 use, and assign numbers to the GPIOs they expose. Those GPIOs 277 can then be used from drivers and other kernel code, just like 278 other GPIOs, but only accessible from task contexts. 279 280 This driver provides an in-kernel interface to those GPIOs using 281 platform-neutral GPIO calls. 282 283config GPIO_SX150X 284 bool "Semtech SX150x I2C GPIO expander" 285 depends on I2C=y 286 default n 287 help 288 Say yes here to provide support for Semtech SX150-series I2C 289 GPIO expanders. Compatible models include: 290 291 8 bits: sx1508q 292 16 bits: sx1509q 293 294config GPIO_STMPE 295 bool "STMPE GPIOs" 296 depends on MFD_STMPE 297 help 298 This enables support for the GPIOs found on the STMPE I/O 299 Expanders. 300 301config GPIO_TC3589X 302 bool "TC3589X GPIOs" 303 depends on MFD_TC3589X 304 help 305 This enables support for the GPIOs found on the TC3589X 306 I/O Expander. 307 308config GPIO_TPS65912 309 tristate "TI TPS65912 GPIO" 310 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 311 help 312 This driver supports TPS65912 gpio chip 313 314config GPIO_TWL4030 315 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 316 depends on TWL4030_CORE 317 help 318 Say yes here to access the GPIO signals of various multi-function 319 power management chips from Texas Instruments. 320 321config GPIO_WM831X 322 tristate "WM831x GPIOs" 323 depends on MFD_WM831X 324 help 325 Say yes here to access the GPIO signals of WM831x power management 326 chips from Wolfson Microelectronics. 327 328config GPIO_WM8350 329 tristate "WM8350 GPIOs" 330 depends on MFD_WM8350 331 help 332 Say yes here to access the GPIO signals of WM8350 power management 333 chips from Wolfson Microelectronics. 334 335config GPIO_WM8994 336 tristate "WM8994 GPIOs" 337 depends on MFD_WM8994 338 help 339 Say yes here to access the GPIO signals of WM8994 audio hub 340 CODECs from Wolfson Microelectronics. 341 342config GPIO_ADP5520 343 tristate "GPIO Support for ADP5520 PMIC" 344 depends on PMIC_ADP5520 345 help 346 This option enables support for on-chip GPIO found 347 on Analog Devices ADP5520 PMICs. 348 349config GPIO_ADP5588 350 tristate "ADP5588 I2C GPIO expander" 351 depends on I2C 352 help 353 This option enables support for 18 GPIOs found 354 on Analog Devices ADP5588 GPIO Expanders. 355 356config GPIO_ADP5588_IRQ 357 bool "Interrupt controller support for ADP5588" 358 depends on GPIO_ADP5588=y 359 help 360 Say yes here to enable the adp5588 to be used as an interrupt 361 controller. It requires the driver to be built in the kernel. 362 363comment "PCI GPIO expanders:" 364 365config GPIO_CS5535 366 tristate "AMD CS5535/CS5536 GPIO support" 367 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 368 help 369 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 370 can be used for quite a number of things. The CS5535/6 is found on 371 AMD Geode and Lemote Yeeloong devices. 372 373 If unsure, say N. 374 375config GPIO_BT8XX 376 tristate "BT8XX GPIO abuser" 377 depends on PCI && VIDEO_BT848=n 378 help 379 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 380 as a cheap PCI GPIO card. 381 382 This chip can be found on Miro, Hauppauge and STB TV-cards. 383 384 The card needs to be physically altered for using it as a 385 GPIO card. For more information on how to build a GPIO card 386 from a BT8xx TV card, see the documentation file at 387 Documentation/bt8xxgpio.txt 388 389 If unsure, say N. 390 391config GPIO_LANGWELL 392 bool "Intel Langwell/Penwell GPIO support" 393 depends on PCI && X86 394 help 395 Say Y here to support Intel Langwell/Penwell GPIO. 396 397config GPIO_PCH 398 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 399 depends on PCI && X86 400 select GENERIC_IRQ_CHIP 401 help 402 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 403 which is an IOH(Input/Output Hub) for x86 embedded processor. 404 This driver can access PCH GPIO device. 405 406 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 407 Output Hub), ML7223. 408 ML7223 IOH is for MP(Media Phone) use. 409 ML7223 is companion chip for Intel Atom E6xx series. 410 ML7223 is completely compatible for Intel EG20T PCH. 411 412config GPIO_ML_IOH 413 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 414 depends on PCI 415 select GENERIC_IRQ_CHIP 416 help 417 ML7213 is companion chip for Intel Atom E6xx series. 418 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 419 Hub) which is for IVI(In-Vehicle Infotainment) use. 420 This driver can access the IOH's GPIO device. 421 422config GPIO_TIMBERDALE 423 bool "Support for timberdale GPIO IP" 424 depends on MFD_TIMBERDALE && HAS_IOMEM 425 ---help--- 426 Add support for the GPIO IP in the timberdale FPGA. 427 428config GPIO_RDC321X 429 tristate "RDC R-321x GPIO support" 430 depends on PCI 431 select MFD_SUPPORT 432 select MFD_CORE 433 select MFD_RDC321X 434 help 435 Support for the RDC R321x SoC GPIOs over southbridge 436 PCI configuration space. 437 438comment "SPI GPIO expanders:" 439 440config GPIO_MAX7301 441 tristate "Maxim MAX7301 GPIO expander" 442 depends on SPI_MASTER 443 select GPIO_MAX730X 444 help 445 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 446 447config GPIO_MCP23S08 448 tristate "Microchip MCP23xxx I/O expander" 449 depends on SPI_MASTER || I2C 450 help 451 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 452 I/O expanders. 453 This provides a GPIO interface supporting inputs and outputs. 454 455config GPIO_MC33880 456 tristate "Freescale MC33880 high-side/low-side switch" 457 depends on SPI_MASTER 458 help 459 SPI driver for Freescale MC33880 high-side/low-side switch. 460 This provides GPIO interface supporting inputs and outputs. 461 462config GPIO_74X164 463 tristate "74x164 serial-in/parallel-out 8-bits shift register" 464 depends on SPI_MASTER 465 help 466 Platform driver for 74x164 compatible serial-in/parallel-out 467 8-outputs shift registers. This driver can be used to provide access 468 to more gpio outputs. 469 470comment "AC97 GPIO expanders:" 471 472config GPIO_UCB1400 473 bool "Philips UCB1400 GPIO" 474 depends on UCB1400_CORE 475 help 476 This enables support for the Philips UCB1400 GPIO pins. 477 The UCB1400 is an AC97 audio codec. 478 479comment "MODULbus GPIO expanders:" 480 481config GPIO_JANZ_TTL 482 tristate "Janz VMOD-TTL Digital IO Module" 483 depends on MFD_JANZ_CMODIO 484 help 485 This enables support for the Janz VMOD-TTL Digital IO module. 486 This driver provides support for driving the pins in output 487 mode only. Input mode is not supported. 488 489config GPIO_AB8500 490 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 491 depends on AB8500_CORE && BROKEN 492 help 493 Select this to enable the AB8500 IC GPIO driver 494 495config GPIO_TPS65910 496 bool "TPS65910 GPIO" 497 depends on MFD_TPS65910 498 help 499 Select this option to enable GPIO driver for the TPS65910 500 chip family. 501endif 502