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 && BROKEN 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 select GENERIC_IRQ_CHIP 142 help 143 Say yes here to support the PrimeCell PL061 GPIO device 144 145config GPIO_PXA 146 bool "PXA GPIO support" 147 depends on ARCH_PXA || ARCH_MMP 148 help 149 Say yes here to support the PXA GPIO device 150 151config GPIO_XILINX 152 bool "Xilinx GPIO support" 153 depends on PPC_OF || MICROBLAZE 154 help 155 Say yes here to support the Xilinx FPGA GPIO device 156 157config GPIO_VR41XX 158 tristate "NEC VR4100 series General-purpose I/O Uint support" 159 depends on CPU_VR41XX 160 help 161 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 162 163config GPIO_SCH 164 tristate "Intel SCH/TunnelCreek GPIO" 165 depends on PCI && X86 166 select MFD_CORE 167 select LPC_SCH 168 help 169 Say yes here to support GPIO interface on Intel Poulsbo SCH 170 or Intel Tunnel Creek processor. 171 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 172 powered by the core power rail and are turned off during sleep 173 modes (S3 and higher). The remaining four GPIOs are powered by 174 the Intel SCH suspend power supply. These GPIOs remain 175 active during S3. The suspend powered GPIOs can be used to wake the 176 system from the Suspend-to-RAM state. 177 The Intel Tunnel Creek processor has 5 GPIOs powered by the 178 core power rail and 9 from suspend power supply. 179 180config GPIO_VX855 181 tristate "VIA VX855/VX875 GPIO" 182 depends on PCI 183 select MFD_CORE 184 select MFD_VX855 185 help 186 Support access to the VX855/VX875 GPIO lines through the gpio library. 187 188 This driver provides common support for accessing the device, 189 additional drivers must be enabled in order to use the 190 functionality of the device. 191 192comment "I2C GPIO expanders:" 193 194config GPIO_MAX7300 195 tristate "Maxim MAX7300 GPIO expander" 196 depends on I2C 197 select GPIO_MAX730X 198 help 199 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 200 201config GPIO_MAX732X 202 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 203 depends on I2C 204 help 205 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 206 Port Expanders. Each IO port on these chips has a fixed role of 207 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 208 Input and Output (designed by 'P'). The combinations are listed 209 below: 210 211 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 212 max7322 (4I4O), max7323 (4P4O) 213 214 16 bits: max7324 (8I8O), max7325 (8P8O), 215 max7326 (4I12O), max7327 (4P12O) 216 217 Board setup code must specify the model to use, and the start 218 number for these GPIOs. 219 220config GPIO_MAX732X_IRQ 221 bool "Interrupt controller support for MAX732x" 222 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 223 help 224 Say yes here to enable the max732x to be used as an interrupt 225 controller. It requires the driver to be built in the kernel. 226 227config GPIO_PCA953X 228 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 229 depends on I2C 230 help 231 Say yes here to provide access to several register-oriented 232 SMBus I/O expanders, made mostly by NXP or TI. Compatible 233 models include: 234 235 4 bits: pca9536, pca9537 236 237 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 238 tca6408 239 240 16 bits: pca9535, pca9539, pca9555, tca6416 241 242config GPIO_PCA953X_IRQ 243 bool "Interrupt controller support for PCA953x" 244 depends on GPIO_PCA953X=y 245 help 246 Say yes here to enable the pca953x to be used as an interrupt 247 controller. It requires the driver to be built in the kernel. 248 249config GPIO_PCF857X 250 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 251 depends on I2C 252 help 253 Say yes here to provide access to most "quasi-bidirectional" I2C 254 GPIO expanders used for additional digital outputs or inputs. 255 Most of these parts are from NXP, though TI is a second source for 256 some of them. Compatible models include: 257 258 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 259 pca9670, pca9672, pca9674, pca9674a, 260 max7328, max7329 261 262 16 bits: pcf8575, pcf8575c, pca8575, 263 pca9671, pca9673, pca9675 264 265 Your board setup code will need to declare the expanders in 266 use, and assign numbers to the GPIOs they expose. Those GPIOs 267 can then be used from drivers and other kernel code, just like 268 other GPIOs, but only accessible from task contexts. 269 270 This driver provides an in-kernel interface to those GPIOs using 271 platform-neutral GPIO calls. 272 273config GPIO_SX150X 274 bool "Semtech SX150x I2C GPIO expander" 275 depends on I2C=y 276 default n 277 help 278 Say yes here to provide support for Semtech SX150-series I2C 279 GPIO expanders. Compatible models include: 280 281 8 bits: sx1508q 282 16 bits: sx1509q 283 284config GPIO_STMPE 285 bool "STMPE GPIOs" 286 depends on MFD_STMPE 287 help 288 This enables support for the GPIOs found on the STMPE I/O 289 Expanders. 290 291config GPIO_TC3589X 292 bool "TC3589X GPIOs" 293 depends on MFD_TC3589X 294 help 295 This enables support for the GPIOs found on the TC3589X 296 I/O Expander. 297 298config GPIO_TPS65912 299 tristate "TI TPS65912 GPIO" 300 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 301 help 302 This driver supports TPS65912 gpio chip 303 304config GPIO_TWL4030 305 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 306 depends on TWL4030_CORE 307 help 308 Say yes here to access the GPIO signals of various multi-function 309 power management chips from Texas Instruments. 310 311config GPIO_WM831X 312 tristate "WM831x GPIOs" 313 depends on MFD_WM831X 314 help 315 Say yes here to access the GPIO signals of WM831x power management 316 chips from Wolfson Microelectronics. 317 318config GPIO_WM8350 319 tristate "WM8350 GPIOs" 320 depends on MFD_WM8350 321 help 322 Say yes here to access the GPIO signals of WM8350 power management 323 chips from Wolfson Microelectronics. 324 325config GPIO_WM8994 326 tristate "WM8994 GPIOs" 327 depends on MFD_WM8994 328 help 329 Say yes here to access the GPIO signals of WM8994 audio hub 330 CODECs from Wolfson Microelectronics. 331 332config GPIO_ADP5520 333 tristate "GPIO Support for ADP5520 PMIC" 334 depends on PMIC_ADP5520 335 help 336 This option enables support for on-chip GPIO found 337 on Analog Devices ADP5520 PMICs. 338 339config GPIO_ADP5588 340 tristate "ADP5588 I2C GPIO expander" 341 depends on I2C 342 help 343 This option enables support for 18 GPIOs found 344 on Analog Devices ADP5588 GPIO Expanders. 345 346config GPIO_ADP5588_IRQ 347 bool "Interrupt controller support for ADP5588" 348 depends on GPIO_ADP5588=y 349 help 350 Say yes here to enable the adp5588 to be used as an interrupt 351 controller. It requires the driver to be built in the kernel. 352 353comment "PCI GPIO expanders:" 354 355config GPIO_CS5535 356 tristate "AMD CS5535/CS5536 GPIO support" 357 depends on PCI && X86 && MFD_CS5535 358 help 359 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 360 can be used for quite a number of things. The CS5535/6 is found on 361 AMD Geode and Lemote Yeeloong devices. 362 363 If unsure, say N. 364 365config GPIO_BT8XX 366 tristate "BT8XX GPIO abuser" 367 depends on PCI && VIDEO_BT848=n 368 help 369 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 370 as a cheap PCI GPIO card. 371 372 This chip can be found on Miro, Hauppauge and STB TV-cards. 373 374 The card needs to be physically altered for using it as a 375 GPIO card. For more information on how to build a GPIO card 376 from a BT8xx TV card, see the documentation file at 377 Documentation/bt8xxgpio.txt 378 379 If unsure, say N. 380 381config GPIO_LANGWELL 382 bool "Intel Langwell/Penwell GPIO support" 383 depends on PCI && X86 384 help 385 Say Y here to support Intel Langwell/Penwell GPIO. 386 387config GPIO_PCH 388 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 389 depends on PCI && X86 390 select GENERIC_IRQ_CHIP 391 help 392 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 393 which is an IOH(Input/Output Hub) for x86 embedded processor. 394 This driver can access PCH GPIO device. 395 396 This driver also can be used for LAPIS Semiconductor IOH(Input/ 397 Output Hub), ML7223 and ML7831. 398 ML7223 IOH is for MP(Media Phone) use. 399 ML7831 IOH is for general purpose use. 400 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 401 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 402 403config GPIO_ML_IOH 404 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 405 depends on PCI 406 select GENERIC_IRQ_CHIP 407 help 408 ML7213 is companion chip for Intel Atom E6xx series. 409 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 410 Hub) which is for IVI(In-Vehicle Infotainment) use. 411 This driver can access the IOH's GPIO device. 412 413config GPIO_TIMBERDALE 414 bool "Support for timberdale GPIO IP" 415 depends on MFD_TIMBERDALE && HAS_IOMEM 416 ---help--- 417 Add support for the GPIO IP in the timberdale FPGA. 418 419config GPIO_RDC321X 420 tristate "RDC R-321x GPIO support" 421 depends on PCI 422 select MFD_CORE 423 select MFD_RDC321X 424 help 425 Support for the RDC R321x SoC GPIOs over southbridge 426 PCI configuration space. 427 428comment "SPI GPIO expanders:" 429 430config GPIO_MAX7301 431 tristate "Maxim MAX7301 GPIO expander" 432 depends on SPI_MASTER 433 select GPIO_MAX730X 434 help 435 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 436 437config GPIO_MCP23S08 438 tristate "Microchip MCP23xxx I/O expander" 439 depends on SPI_MASTER || I2C 440 help 441 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 442 I/O expanders. 443 This provides a GPIO interface supporting inputs and outputs. 444 445config GPIO_MC33880 446 tristate "Freescale MC33880 high-side/low-side switch" 447 depends on SPI_MASTER 448 help 449 SPI driver for Freescale MC33880 high-side/low-side switch. 450 This provides GPIO interface supporting inputs and outputs. 451 452config GPIO_74X164 453 tristate "74x164 serial-in/parallel-out 8-bits shift register" 454 depends on SPI_MASTER 455 help 456 Platform driver for 74x164 compatible serial-in/parallel-out 457 8-outputs shift registers. This driver can be used to provide access 458 to more gpio outputs. 459 460comment "AC97 GPIO expanders:" 461 462config GPIO_UCB1400 463 bool "Philips UCB1400 GPIO" 464 depends on UCB1400_CORE 465 help 466 This enables support for the Philips UCB1400 GPIO pins. 467 The UCB1400 is an AC97 audio codec. 468 469comment "MODULbus GPIO expanders:" 470 471config GPIO_JANZ_TTL 472 tristate "Janz VMOD-TTL Digital IO Module" 473 depends on MFD_JANZ_CMODIO 474 help 475 This enables support for the Janz VMOD-TTL Digital IO module. 476 This driver provides support for driving the pins in output 477 mode only. Input mode is not supported. 478 479config GPIO_AB8500 480 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 481 depends on AB8500_CORE && BROKEN 482 help 483 Select this to enable the AB8500 IC GPIO driver 484 485config GPIO_TPS65910 486 bool "TPS65910 GPIO" 487 depends on MFD_TPS65910 488 help 489 Select this option to enable GPIO driver for the TPS65910 490 chip family. 491endif 492