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