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_MPC8XXX 103 bool "MPC512x/MPC8xxx GPIO support" 104 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 105 FSL_SOC_BOOKE || PPC_86xx 106 help 107 Say Y here if you're going to use hardware that connects to the 108 MPC512x/831x/834x/837x/8572/8610 GPIOs. 109 110config GPIO_MSM_V1 111 tristate "Qualcomm MSM GPIO v1" 112 depends on GPIOLIB && ARCH_MSM 113 help 114 Say yes here to support the GPIO interface on ARM v6 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_MSM_V2 119 tristate "Qualcomm MSM GPIO v2" 120 depends on GPIOLIB && ARCH_MSM 121 help 122 Say yes here to support the GPIO interface on ARM v7 based 123 Qualcomm MSM chips. Most of the pins on the MSM can be 124 selected for GPIO, and are controlled by this driver. 125 126config GPIO_MXC 127 def_bool y 128 depends on ARCH_MXC 129 select GPIO_GENERIC 130 select GENERIC_IRQ_CHIP 131 132config GPIO_MXS 133 def_bool y 134 depends on ARCH_MXS 135 select GPIO_GENERIC 136 select GENERIC_IRQ_CHIP 137 138config GPIO_PL061 139 bool "PrimeCell PL061 GPIO support" 140 depends on ARM_AMBA 141 help 142 Say yes here to support the PrimeCell PL061 GPIO device 143 144config GPIO_XILINX 145 bool "Xilinx GPIO support" 146 depends on PPC_OF || MICROBLAZE 147 help 148 Say yes here to support the Xilinx FPGA GPIO device 149 150config GPIO_VR41XX 151 tristate "NEC VR4100 series General-purpose I/O Uint support" 152 depends on CPU_VR41XX 153 help 154 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 155 156config GPIO_SCH 157 tristate "Intel SCH/TunnelCreek GPIO" 158 depends on PCI && X86 159 select MFD_CORE 160 select LPC_SCH 161 help 162 Say yes here to support GPIO interface on Intel Poulsbo SCH 163 or Intel Tunnel Creek processor. 164 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 165 powered by the core power rail and are turned off during sleep 166 modes (S3 and higher). The remaining four GPIOs are powered by 167 the Intel SCH suspend power supply. These GPIOs remain 168 active during S3. The suspend powered GPIOs can be used to wake the 169 system from the Suspend-to-RAM state. 170 The Intel Tunnel Creek processor has 5 GPIOs powered by the 171 core power rail and 9 from suspend power supply. 172 173config GPIO_U300 174 bool "ST-Ericsson U300 COH 901 335/571 GPIO" 175 depends on GPIOLIB && ARCH_U300 176 help 177 Say yes here to support GPIO interface on ST-Ericsson U300. 178 The names of the two IP block variants supported are 179 COH 901 335 and COH 901 571/3. They contain 3, 5 or 7 180 ports of 8 GPIO pins each. 181 182config GPIO_VX855 183 tristate "VIA VX855/VX875 GPIO" 184 depends on PCI 185 select MFD_CORE 186 select MFD_VX855 187 help 188 Support access to the VX855/VX875 GPIO lines through the gpio library. 189 190 This driver provides common support for accessing the device, 191 additional drivers must be enabled in order to use the 192 functionality of the device. 193 194comment "I2C GPIO expanders:" 195 196config GPIO_MAX7300 197 tristate "Maxim MAX7300 GPIO expander" 198 depends on I2C 199 select GPIO_MAX730X 200 help 201 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 202 203config GPIO_MAX732X 204 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 205 depends on I2C 206 help 207 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 208 Port Expanders. Each IO port on these chips has a fixed role of 209 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 210 Input and Output (designed by 'P'). The combinations are listed 211 below: 212 213 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 214 max7322 (4I4O), max7323 (4P4O) 215 216 16 bits: max7324 (8I8O), max7325 (8P8O), 217 max7326 (4I12O), max7327 (4P12O) 218 219 Board setup code must specify the model to use, and the start 220 number for these GPIOs. 221 222config GPIO_MAX732X_IRQ 223 bool "Interrupt controller support for MAX732x" 224 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 225 help 226 Say yes here to enable the max732x to be used as an interrupt 227 controller. It requires the driver to be built in the kernel. 228 229config GPIO_PCA953X 230 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 231 depends on I2C 232 help 233 Say yes here to provide access to several register-oriented 234 SMBus I/O expanders, made mostly by NXP or TI. Compatible 235 models include: 236 237 4 bits: pca9536, pca9537 238 239 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 240 tca6408 241 242 16 bits: pca9535, pca9539, pca9555, tca6416 243 244config GPIO_PCA953X_IRQ 245 bool "Interrupt controller support for PCA953x" 246 depends on GPIO_PCA953X=y 247 help 248 Say yes here to enable the pca953x to be used as an interrupt 249 controller. It requires the driver to be built in the kernel. 250 251config GPIO_PCF857X 252 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 253 depends on I2C 254 help 255 Say yes here to provide access to most "quasi-bidirectional" I2C 256 GPIO expanders used for additional digital outputs or inputs. 257 Most of these parts are from NXP, though TI is a second source for 258 some of them. Compatible models include: 259 260 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 261 pca9670, pca9672, pca9674, pca9674a, 262 max7328, max7329 263 264 16 bits: pcf8575, pcf8575c, pca8575, 265 pca9671, pca9673, pca9675 266 267 Your board setup code will need to declare the expanders in 268 use, and assign numbers to the GPIOs they expose. Those GPIOs 269 can then be used from drivers and other kernel code, just like 270 other GPIOs, but only accessible from task contexts. 271 272 This driver provides an in-kernel interface to those GPIOs using 273 platform-neutral GPIO calls. 274 275config GPIO_SX150X 276 bool "Semtech SX150x I2C GPIO expander" 277 depends on I2C=y 278 default n 279 help 280 Say yes here to provide support for Semtech SX150-series I2C 281 GPIO expanders. Compatible models include: 282 283 8 bits: sx1508q 284 16 bits: sx1509q 285 286config GPIO_STMPE 287 bool "STMPE GPIOs" 288 depends on MFD_STMPE 289 help 290 This enables support for the GPIOs found on the STMPE I/O 291 Expanders. 292 293config GPIO_TC3589X 294 bool "TC3589X GPIOs" 295 depends on MFD_TC3589X 296 help 297 This enables support for the GPIOs found on the TC3589X 298 I/O Expander. 299 300config GPIO_TPS65912 301 tristate "TI TPS65912 GPIO" 302 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 303 help 304 This driver supports TPS65912 gpio chip 305 306config GPIO_TWL4030 307 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 308 depends on TWL4030_CORE 309 help 310 Say yes here to access the GPIO signals of various multi-function 311 power management chips from Texas Instruments. 312 313config GPIO_WM831X 314 tristate "WM831x GPIOs" 315 depends on MFD_WM831X 316 help 317 Say yes here to access the GPIO signals of WM831x power management 318 chips from Wolfson Microelectronics. 319 320config GPIO_WM8350 321 tristate "WM8350 GPIOs" 322 depends on MFD_WM8350 323 help 324 Say yes here to access the GPIO signals of WM8350 power management 325 chips from Wolfson Microelectronics. 326 327config GPIO_WM8994 328 tristate "WM8994 GPIOs" 329 depends on MFD_WM8994 330 help 331 Say yes here to access the GPIO signals of WM8994 audio hub 332 CODECs from Wolfson Microelectronics. 333 334config GPIO_ADP5520 335 tristate "GPIO Support for ADP5520 PMIC" 336 depends on PMIC_ADP5520 337 help 338 This option enables support for on-chip GPIO found 339 on Analog Devices ADP5520 PMICs. 340 341config GPIO_ADP5588 342 tristate "ADP5588 I2C GPIO expander" 343 depends on I2C 344 help 345 This option enables support for 18 GPIOs found 346 on Analog Devices ADP5588 GPIO Expanders. 347 348config GPIO_ADP5588_IRQ 349 bool "Interrupt controller support for ADP5588" 350 depends on GPIO_ADP5588=y 351 help 352 Say yes here to enable the adp5588 to be used as an interrupt 353 controller. It requires the driver to be built in the kernel. 354 355comment "PCI GPIO expanders:" 356 357config GPIO_CS5535 358 tristate "AMD CS5535/CS5536 GPIO support" 359 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 360 help 361 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 362 can be used for quite a number of things. The CS5535/6 is found on 363 AMD Geode and Lemote Yeeloong devices. 364 365 If unsure, say N. 366 367config GPIO_BT8XX 368 tristate "BT8XX GPIO abuser" 369 depends on PCI && VIDEO_BT848=n 370 help 371 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 372 as a cheap PCI GPIO card. 373 374 This chip can be found on Miro, Hauppauge and STB TV-cards. 375 376 The card needs to be physically altered for using it as a 377 GPIO card. For more information on how to build a GPIO card 378 from a BT8xx TV card, see the documentation file at 379 Documentation/bt8xxgpio.txt 380 381 If unsure, say N. 382 383config GPIO_LANGWELL 384 bool "Intel Langwell/Penwell GPIO support" 385 depends on PCI && X86 386 help 387 Say Y here to support Intel Langwell/Penwell GPIO. 388 389config GPIO_PCH 390 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 391 depends on PCI && X86 392 select GENERIC_IRQ_CHIP 393 help 394 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 395 which is an IOH(Input/Output Hub) for x86 embedded processor. 396 This driver can access PCH GPIO device. 397 398 This driver also can be used for OKI SEMICONDUCTOR IOH(Input/ 399 Output Hub), ML7223. 400 ML7223 IOH is for MP(Media Phone) use. 401 ML7223 is companion chip for Intel Atom E6xx series. 402 ML7223 is completely compatible for Intel EG20T PCH. 403 404config GPIO_ML_IOH 405 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 406 depends on PCI 407 select GENERIC_IRQ_CHIP 408 help 409 ML7213 is companion chip for Intel Atom E6xx series. 410 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 411 Hub) which is for IVI(In-Vehicle Infotainment) use. 412 This driver can access the IOH's GPIO device. 413 414config GPIO_TIMBERDALE 415 bool "Support for timberdale GPIO IP" 416 depends on MFD_TIMBERDALE && HAS_IOMEM 417 ---help--- 418 Add support for the GPIO IP in the timberdale FPGA. 419 420config GPIO_RDC321X 421 tristate "RDC R-321x GPIO support" 422 depends on PCI 423 select MFD_CORE 424 select MFD_RDC321X 425 help 426 Support for the RDC R321x SoC GPIOs over southbridge 427 PCI configuration space. 428 429comment "SPI GPIO expanders:" 430 431config GPIO_MAX7301 432 tristate "Maxim MAX7301 GPIO expander" 433 depends on SPI_MASTER 434 select GPIO_MAX730X 435 help 436 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 437 438config GPIO_MCP23S08 439 tristate "Microchip MCP23xxx I/O expander" 440 depends on SPI_MASTER || I2C 441 help 442 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 443 I/O expanders. 444 This provides a GPIO interface supporting inputs and outputs. 445 446config GPIO_MC33880 447 tristate "Freescale MC33880 high-side/low-side switch" 448 depends on SPI_MASTER 449 help 450 SPI driver for Freescale MC33880 high-side/low-side switch. 451 This provides GPIO interface supporting inputs and outputs. 452 453config GPIO_74X164 454 tristate "74x164 serial-in/parallel-out 8-bits shift register" 455 depends on SPI_MASTER 456 help 457 Platform driver for 74x164 compatible serial-in/parallel-out 458 8-outputs shift registers. This driver can be used to provide access 459 to more gpio outputs. 460 461comment "AC97 GPIO expanders:" 462 463config GPIO_UCB1400 464 bool "Philips UCB1400 GPIO" 465 depends on UCB1400_CORE 466 help 467 This enables support for the Philips UCB1400 GPIO pins. 468 The UCB1400 is an AC97 audio codec. 469 470comment "MODULbus GPIO expanders:" 471 472config GPIO_JANZ_TTL 473 tristate "Janz VMOD-TTL Digital IO Module" 474 depends on MFD_JANZ_CMODIO 475 help 476 This enables support for the Janz VMOD-TTL Digital IO module. 477 This driver provides support for driving the pins in output 478 mode only. Input mode is not supported. 479 480config GPIO_AB8500 481 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 482 depends on AB8500_CORE && BROKEN 483 help 484 Select this to enable the AB8500 IC GPIO driver 485 486config GPIO_TPS65910 487 bool "TPS65910 GPIO" 488 depends on MFD_TPS65910 489 help 490 Select this option to enable GPIO driver for the TPS65910 491 chip family. 492endif 493