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_MPC8XXX 107 bool "MPC512x/MPC8xxx GPIO support" 108 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 109 FSL_SOC_BOOKE || PPC_86xx 110 help 111 Say Y here if you're going to use hardware that connects to the 112 MPC512x/831x/834x/837x/8572/8610 GPIOs. 113 114config GPIO_MSM_V1 115 tristate "Qualcomm MSM GPIO v1" 116 depends on GPIOLIB && ARCH_MSM 117 help 118 Say yes here to support the GPIO interface on ARM v6 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_MSM_V2 123 tristate "Qualcomm MSM GPIO v2" 124 depends on GPIOLIB && ARCH_MSM 125 help 126 Say yes here to support the GPIO interface on ARM v7 based 127 Qualcomm MSM chips. Most of the pins on the MSM can be 128 selected for GPIO, and are controlled by this driver. 129 130config GPIO_MXC 131 def_bool y 132 depends on ARCH_MXC 133 select GPIO_GENERIC 134 select GENERIC_IRQ_CHIP 135 136config GPIO_MXS 137 def_bool y 138 depends on ARCH_MXS 139 select GPIO_GENERIC 140 select GENERIC_IRQ_CHIP 141 142config GPIO_PLAT_SAMSUNG 143 def_bool y 144 depends on SAMSUNG_GPIOLIB_4BIT 145 146config GPIO_S5PC100 147 def_bool y 148 depends on CPU_S5PC100 149 150config GPIO_S5PV210 151 def_bool y 152 depends on CPU_S5PV210 153 154config GPIO_PL061 155 bool "PrimeCell PL061 GPIO support" 156 depends on ARM_AMBA 157 help 158 Say yes here to support the PrimeCell PL061 GPIO device 159 160config GPIO_XILINX 161 bool "Xilinx GPIO support" 162 depends on PPC_OF || MICROBLAZE 163 help 164 Say yes here to support the Xilinx FPGA GPIO device 165 166config GPIO_VR41XX 167 tristate "NEC VR4100 series General-purpose I/O Uint support" 168 depends on CPU_VR41XX 169 help 170 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 171 172config GPIO_SCH 173 tristate "Intel SCH/TunnelCreek GPIO" 174 depends on PCI && X86 175 select MFD_CORE 176 select LPC_SCH 177 help 178 Say yes here to support GPIO interface on Intel Poulsbo SCH 179 or Intel Tunnel Creek processor. 180 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 181 powered by the core power rail and are turned off during sleep 182 modes (S3 and higher). The remaining four GPIOs are powered by 183 the Intel SCH suspend power supply. These GPIOs remain 184 active during S3. The suspend powered GPIOs can be used to wake the 185 system from the Suspend-to-RAM state. 186 The Intel Tunnel Creek processor has 5 GPIOs powered by the 187 core power rail and 9 from suspend power supply. 188 189config GPIO_VX855 190 tristate "VIA VX855/VX875 GPIO" 191 depends on MFD_SUPPORT && PCI 192 select MFD_CORE 193 select MFD_VX855 194 help 195 Support access to the VX855/VX875 GPIO lines through the gpio library. 196 197 This driver provides common support for accessing the device, 198 additional drivers must be enabled in order to use the 199 functionality of the device. 200 201comment "I2C GPIO expanders:" 202 203config GPIO_MAX7300 204 tristate "Maxim MAX7300 GPIO expander" 205 depends on I2C 206 select GPIO_MAX730X 207 help 208 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 209 210config GPIO_MAX732X 211 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 212 depends on I2C 213 help 214 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 215 Port Expanders. Each IO port on these chips has a fixed role of 216 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 217 Input and Output (designed by 'P'). The combinations are listed 218 below: 219 220 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 221 max7322 (4I4O), max7323 (4P4O) 222 223 16 bits: max7324 (8I8O), max7325 (8P8O), 224 max7326 (4I12O), max7327 (4P12O) 225 226 Board setup code must specify the model to use, and the start 227 number for these GPIOs. 228 229config GPIO_MAX732X_IRQ 230 bool "Interrupt controller support for MAX732x" 231 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 232 help 233 Say yes here to enable the max732x to be used as an interrupt 234 controller. It requires the driver to be built in the kernel. 235 236config GPIO_PCA953X 237 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 238 depends on I2C 239 help 240 Say yes here to provide access to several register-oriented 241 SMBus I/O expanders, made mostly by NXP or TI. Compatible 242 models include: 243 244 4 bits: pca9536, pca9537 245 246 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 247 tca6408 248 249 16 bits: pca9535, pca9539, pca9555, tca6416 250 251config GPIO_PCA953X_IRQ 252 bool "Interrupt controller support for PCA953x" 253 depends on GPIO_PCA953X=y 254 help 255 Say yes here to enable the pca953x to be used as an interrupt 256 controller. It requires the driver to be built in the kernel. 257 258config GPIO_PCF857X 259 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 260 depends on I2C 261 help 262 Say yes here to provide access to most "quasi-bidirectional" I2C 263 GPIO expanders used for additional digital outputs or inputs. 264 Most of these parts are from NXP, though TI is a second source for 265 some of them. Compatible models include: 266 267 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 268 pca9670, pca9672, pca9674, pca9674a, 269 max7328, max7329 270 271 16 bits: pcf8575, pcf8575c, pca8575, 272 pca9671, pca9673, pca9675 273 274 Your board setup code will need to declare the expanders in 275 use, and assign numbers to the GPIOs they expose. Those GPIOs 276 can then be used from drivers and other kernel code, just like 277 other GPIOs, but only accessible from task contexts. 278 279 This driver provides an in-kernel interface to those GPIOs using 280 platform-neutral GPIO calls. 281 282config GPIO_SX150X 283 bool "Semtech SX150x I2C GPIO expander" 284 depends on I2C=y 285 default n 286 help 287 Say yes here to provide support for Semtech SX150-series I2C 288 GPIO expanders. Compatible models include: 289 290 8 bits: sx1508q 291 16 bits: sx1509q 292 293config GPIO_STMPE 294 bool "STMPE GPIOs" 295 depends on MFD_STMPE 296 help 297 This enables support for the GPIOs found on the STMPE I/O 298 Expanders. 299 300config GPIO_TC3589X 301 bool "TC3589X GPIOs" 302 depends on MFD_TC3589X 303 help 304 This enables support for the GPIOs found on the TC3589X 305 I/O Expander. 306 307config GPIO_TPS65912 308 tristate "TI TPS65912 GPIO" 309 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 310 help 311 This driver supports TPS65912 gpio chip 312 313config GPIO_TWL4030 314 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 315 depends on TWL4030_CORE 316 help 317 Say yes here to access the GPIO signals of various multi-function 318 power management chips from Texas Instruments. 319 320config GPIO_WM831X 321 tristate "WM831x GPIOs" 322 depends on MFD_WM831X 323 help 324 Say yes here to access the GPIO signals of WM831x power management 325 chips from Wolfson Microelectronics. 326 327config GPIO_WM8350 328 tristate "WM8350 GPIOs" 329 depends on MFD_WM8350 330 help 331 Say yes here to access the GPIO signals of WM8350 power management 332 chips from Wolfson Microelectronics. 333 334config GPIO_WM8994 335 tristate "WM8994 GPIOs" 336 depends on MFD_WM8994 337 help 338 Say yes here to access the GPIO signals of WM8994 audio hub 339 CODECs from Wolfson Microelectronics. 340 341config GPIO_ADP5520 342 tristate "GPIO Support for ADP5520 PMIC" 343 depends on PMIC_ADP5520 344 help 345 This option enables support for on-chip GPIO found 346 on Analog Devices ADP5520 PMICs. 347 348config GPIO_ADP5588 349 tristate "ADP5588 I2C GPIO expander" 350 depends on I2C 351 help 352 This option enables support for 18 GPIOs found 353 on Analog Devices ADP5588 GPIO Expanders. 354 355config GPIO_ADP5588_IRQ 356 bool "Interrupt controller support for ADP5588" 357 depends on GPIO_ADP5588=y 358 help 359 Say yes here to enable the adp5588 to be used as an interrupt 360 controller. It requires the driver to be built in the kernel. 361 362comment "PCI GPIO expanders:" 363 364config GPIO_CS5535 365 tristate "AMD CS5535/CS5536 GPIO support" 366 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 367 help 368 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 369 can be used for quite a number of things. The CS5535/6 is found on 370 AMD Geode and Lemote Yeeloong devices. 371 372 If unsure, say N. 373 374config GPIO_BT8XX 375 tristate "BT8XX GPIO abuser" 376 depends on PCI && VIDEO_BT848=n 377 help 378 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 379 as a cheap PCI GPIO card. 380 381 This chip can be found on Miro, Hauppauge and STB TV-cards. 382 383 The card needs to be physically altered for using it as a 384 GPIO card. For more information on how to build a GPIO card 385 from a BT8xx TV card, see the documentation file at 386 Documentation/bt8xxgpio.txt 387 388 If unsure, say N. 389 390config GPIO_LANGWELL 391 bool "Intel Langwell/Penwell GPIO support" 392 depends on PCI && X86 393 help 394 Say Y here to support Intel Langwell/Penwell GPIO. 395 396config GPIO_PCH 397 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 398 depends on PCI && X86 399 help 400 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 401 which is an IOH(Input/Output Hub) for x86 embedded processor. 402 This driver can access PCH GPIO device. 403 404 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 405 Output Hub), ML7223. 406 ML7223 IOH is for MP(Media Phone) use. 407 ML7223 is companion chip for Intel Atom E6xx series. 408 ML7223 is completely compatible for Intel EG20T PCH. 409 410config GPIO_ML_IOH 411 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 412 depends on PCI 413 help 414 ML7213 is companion chip for Intel Atom E6xx series. 415 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 416 Hub) which is for IVI(In-Vehicle Infotainment) use. 417 This driver can access the IOH's GPIO device. 418 419config GPIO_TIMBERDALE 420 bool "Support for timberdale GPIO IP" 421 depends on MFD_TIMBERDALE && HAS_IOMEM 422 ---help--- 423 Add support for the GPIO IP in the timberdale FPGA. 424 425config GPIO_RDC321X 426 tristate "RDC R-321x GPIO support" 427 depends on PCI 428 select MFD_SUPPORT 429 select MFD_CORE 430 select MFD_RDC321X 431 help 432 Support for the RDC R321x SoC GPIOs over southbridge 433 PCI configuration space. 434 435comment "SPI GPIO expanders:" 436 437config GPIO_MAX7301 438 tristate "Maxim MAX7301 GPIO expander" 439 depends on SPI_MASTER 440 select GPIO_MAX730X 441 help 442 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 443 444config GPIO_MCP23S08 445 tristate "Microchip MCP23xxx I/O expander" 446 depends on SPI_MASTER || I2C 447 help 448 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 449 I/O expanders. 450 This provides a GPIO interface supporting inputs and outputs. 451 452config GPIO_MC33880 453 tristate "Freescale MC33880 high-side/low-side switch" 454 depends on SPI_MASTER 455 help 456 SPI driver for Freescale MC33880 high-side/low-side switch. 457 This provides GPIO interface supporting inputs and outputs. 458 459config GPIO_74X164 460 tristate "74x164 serial-in/parallel-out 8-bits shift register" 461 depends on SPI_MASTER 462 help 463 Platform driver for 74x164 compatible serial-in/parallel-out 464 8-outputs shift registers. This driver can be used to provide access 465 to more gpio outputs. 466 467comment "AC97 GPIO expanders:" 468 469config GPIO_UCB1400 470 bool "Philips UCB1400 GPIO" 471 depends on UCB1400_CORE 472 help 473 This enables support for the Philips UCB1400 GPIO pins. 474 The UCB1400 is an AC97 audio codec. 475 476comment "MODULbus GPIO expanders:" 477 478config GPIO_JANZ_TTL 479 tristate "Janz VMOD-TTL Digital IO Module" 480 depends on MFD_JANZ_CMODIO 481 help 482 This enables support for the Janz VMOD-TTL Digital IO module. 483 This driver provides support for driving the pins in output 484 mode only. Input mode is not supported. 485 486config GPIO_AB8500 487 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 488 depends on AB8500_CORE && BROKEN 489 help 490 Select this to enable the AB8500 IC GPIO driver 491 492config GPIO_TPS65910 493 bool "TPS65910 GPIO" 494 depends on MFD_TPS65910 495 help 496 Select this option to enable GPIO driver for the TPS65910 497 chip family. 498endif 499