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_VX855 182 tristate "VIA VX855/VX875 GPIO" 183 depends on MFD_SUPPORT && PCI 184 select MFD_CORE 185 select MFD_VX855 186 help 187 Support access to the VX855/VX875 GPIO lines through the gpio library. 188 189 This driver provides common support for accessing the device, 190 additional drivers must be enabled in order to use the 191 functionality of the device. 192 193comment "I2C GPIO expanders:" 194 195config GPIO_MAX7300 196 tristate "Maxim MAX7300 GPIO expander" 197 depends on I2C 198 select GPIO_MAX730X 199 help 200 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 201 202config GPIO_MAX732X 203 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 204 depends on I2C 205 help 206 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 207 Port Expanders. Each IO port on these chips has a fixed role of 208 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 209 Input and Output (designed by 'P'). The combinations are listed 210 below: 211 212 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 213 max7322 (4I4O), max7323 (4P4O) 214 215 16 bits: max7324 (8I8O), max7325 (8P8O), 216 max7326 (4I12O), max7327 (4P12O) 217 218 Board setup code must specify the model to use, and the start 219 number for these GPIOs. 220 221config GPIO_MAX732X_IRQ 222 bool "Interrupt controller support for MAX732x" 223 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 224 help 225 Say yes here to enable the max732x to be used as an interrupt 226 controller. It requires the driver to be built in the kernel. 227 228config GPIO_PCA953X 229 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 230 depends on I2C 231 help 232 Say yes here to provide access to several register-oriented 233 SMBus I/O expanders, made mostly by NXP or TI. Compatible 234 models include: 235 236 4 bits: pca9536, pca9537 237 238 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 239 tca6408 240 241 16 bits: pca9535, pca9539, pca9555, tca6416 242 243config GPIO_PCA953X_IRQ 244 bool "Interrupt controller support for PCA953x" 245 depends on GPIO_PCA953X=y 246 help 247 Say yes here to enable the pca953x to be used as an interrupt 248 controller. It requires the driver to be built in the kernel. 249 250config GPIO_PCF857X 251 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 252 depends on I2C 253 help 254 Say yes here to provide access to most "quasi-bidirectional" I2C 255 GPIO expanders used for additional digital outputs or inputs. 256 Most of these parts are from NXP, though TI is a second source for 257 some of them. Compatible models include: 258 259 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 260 pca9670, pca9672, pca9674, pca9674a, 261 max7328, max7329 262 263 16 bits: pcf8575, pcf8575c, pca8575, 264 pca9671, pca9673, pca9675 265 266 Your board setup code will need to declare the expanders in 267 use, and assign numbers to the GPIOs they expose. Those GPIOs 268 can then be used from drivers and other kernel code, just like 269 other GPIOs, but only accessible from task contexts. 270 271 This driver provides an in-kernel interface to those GPIOs using 272 platform-neutral GPIO calls. 273 274config GPIO_SX150X 275 bool "Semtech SX150x I2C GPIO expander" 276 depends on I2C=y 277 default n 278 help 279 Say yes here to provide support for Semtech SX150-series I2C 280 GPIO expanders. Compatible models include: 281 282 8 bits: sx1508q 283 16 bits: sx1509q 284 285config GPIO_STMPE 286 bool "STMPE GPIOs" 287 depends on MFD_STMPE 288 help 289 This enables support for the GPIOs found on the STMPE I/O 290 Expanders. 291 292config GPIO_TC3589X 293 bool "TC3589X GPIOs" 294 depends on MFD_TC3589X 295 help 296 This enables support for the GPIOs found on the TC3589X 297 I/O Expander. 298 299config GPIO_TPS65912 300 tristate "TI TPS65912 GPIO" 301 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 302 help 303 This driver supports TPS65912 gpio chip 304 305config GPIO_TWL4030 306 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 307 depends on TWL4030_CORE 308 help 309 Say yes here to access the GPIO signals of various multi-function 310 power management chips from Texas Instruments. 311 312config GPIO_WM831X 313 tristate "WM831x GPIOs" 314 depends on MFD_WM831X 315 help 316 Say yes here to access the GPIO signals of WM831x power management 317 chips from Wolfson Microelectronics. 318 319config GPIO_WM8350 320 tristate "WM8350 GPIOs" 321 depends on MFD_WM8350 322 help 323 Say yes here to access the GPIO signals of WM8350 power management 324 chips from Wolfson Microelectronics. 325 326config GPIO_WM8994 327 tristate "WM8994 GPIOs" 328 depends on MFD_WM8994 329 help 330 Say yes here to access the GPIO signals of WM8994 audio hub 331 CODECs from Wolfson Microelectronics. 332 333config GPIO_ADP5520 334 tristate "GPIO Support for ADP5520 PMIC" 335 depends on PMIC_ADP5520 336 help 337 This option enables support for on-chip GPIO found 338 on Analog Devices ADP5520 PMICs. 339 340config GPIO_ADP5588 341 tristate "ADP5588 I2C GPIO expander" 342 depends on I2C 343 help 344 This option enables support for 18 GPIOs found 345 on Analog Devices ADP5588 GPIO Expanders. 346 347config GPIO_ADP5588_IRQ 348 bool "Interrupt controller support for ADP5588" 349 depends on GPIO_ADP5588=y 350 help 351 Say yes here to enable the adp5588 to be used as an interrupt 352 controller. It requires the driver to be built in the kernel. 353 354comment "PCI GPIO expanders:" 355 356config GPIO_CS5535 357 tristate "AMD CS5535/CS5536 GPIO support" 358 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 359 help 360 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 361 can be used for quite a number of things. The CS5535/6 is found on 362 AMD Geode and Lemote Yeeloong devices. 363 364 If unsure, say N. 365 366config GPIO_BT8XX 367 tristate "BT8XX GPIO abuser" 368 depends on PCI && VIDEO_BT848=n 369 help 370 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 371 as a cheap PCI GPIO card. 372 373 This chip can be found on Miro, Hauppauge and STB TV-cards. 374 375 The card needs to be physically altered for using it as a 376 GPIO card. For more information on how to build a GPIO card 377 from a BT8xx TV card, see the documentation file at 378 Documentation/bt8xxgpio.txt 379 380 If unsure, say N. 381 382config GPIO_LANGWELL 383 bool "Intel Langwell/Penwell GPIO support" 384 depends on PCI && X86 385 help 386 Say Y here to support Intel Langwell/Penwell GPIO. 387 388config GPIO_PCH 389 tristate "Intel EG20T PCH / OKI SEMICONDUCTOR ML7223 IOH GPIO" 390 depends on PCI && X86 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 OKI SEMICONDUCTOR IOH(Input/ 397 Output Hub), ML7223. 398 ML7223 IOH is for MP(Media Phone) use. 399 ML7223 is companion chip for Intel Atom E6xx series. 400 ML7223 is completely compatible for Intel EG20T PCH. 401 402config GPIO_ML_IOH 403 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 404 depends on PCI 405 help 406 ML7213 is companion chip for Intel Atom E6xx series. 407 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 408 Hub) which is for IVI(In-Vehicle Infotainment) use. 409 This driver can access the IOH's GPIO device. 410 411config GPIO_TIMBERDALE 412 bool "Support for timberdale GPIO IP" 413 depends on MFD_TIMBERDALE && HAS_IOMEM 414 ---help--- 415 Add support for the GPIO IP in the timberdale FPGA. 416 417config GPIO_RDC321X 418 tristate "RDC R-321x GPIO support" 419 depends on PCI 420 select MFD_SUPPORT 421 select MFD_CORE 422 select MFD_RDC321X 423 help 424 Support for the RDC R321x SoC GPIOs over southbridge 425 PCI configuration space. 426 427comment "SPI GPIO expanders:" 428 429config GPIO_MAX7301 430 tristate "Maxim MAX7301 GPIO expander" 431 depends on SPI_MASTER 432 select GPIO_MAX730X 433 help 434 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 435 436config GPIO_MCP23S08 437 tristate "Microchip MCP23xxx I/O expander" 438 depends on SPI_MASTER || I2C 439 help 440 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 441 I/O expanders. 442 This provides a GPIO interface supporting inputs and outputs. 443 444config GPIO_MC33880 445 tristate "Freescale MC33880 high-side/low-side switch" 446 depends on SPI_MASTER 447 help 448 SPI driver for Freescale MC33880 high-side/low-side switch. 449 This provides GPIO interface supporting inputs and outputs. 450 451config GPIO_74X164 452 tristate "74x164 serial-in/parallel-out 8-bits shift register" 453 depends on SPI_MASTER 454 help 455 Platform driver for 74x164 compatible serial-in/parallel-out 456 8-outputs shift registers. This driver can be used to provide access 457 to more gpio outputs. 458 459comment "AC97 GPIO expanders:" 460 461config GPIO_UCB1400 462 bool "Philips UCB1400 GPIO" 463 depends on UCB1400_CORE 464 help 465 This enables support for the Philips UCB1400 GPIO pins. 466 The UCB1400 is an AC97 audio codec. 467 468comment "MODULbus GPIO expanders:" 469 470config GPIO_JANZ_TTL 471 tristate "Janz VMOD-TTL Digital IO Module" 472 depends on MFD_JANZ_CMODIO 473 help 474 This enables support for the Janz VMOD-TTL Digital IO module. 475 This driver provides support for driving the pins in output 476 mode only. Input mode is not supported. 477 478config GPIO_AB8500 479 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 480 depends on AB8500_CORE && BROKEN 481 help 482 Select this to enable the AB8500 IC GPIO driver 483 484config GPIO_TPS65910 485 bool "TPS65910 GPIO" 486 depends on MFD_TPS65910 487 help 488 Select this option to enable GPIO driver for the TPS65910 489 chip family. 490endif 491