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 66# put drivers in the right section, in alphabetical order 67 68config GPIO_MAX730X 69 tristate 70 71comment "Memory mapped GPIO drivers:" 72 73config GPIO_BASIC_MMIO_CORE 74 tristate 75 help 76 Provides core functionality for basic memory-mapped GPIO controllers. 77 78config GPIO_BASIC_MMIO 79 tristate "Basic memory-mapped GPIO controllers support" 80 select GPIO_BASIC_MMIO_CORE 81 help 82 Say yes here to support basic memory-mapped GPIO controllers. 83 84config GPIO_IT8761E 85 tristate "IT8761E GPIO support" 86 help 87 Say yes here to support GPIO functionality of IT8761E super I/O chip. 88 89config GPIO_EXYNOS4 90 bool "Samsung Exynos4 GPIO library support" 91 default y if CPU_EXYNOS4210 92 help 93 Say yes here to support Samsung Exynos4 series SoCs GPIO library 94 95config GPIO_PLAT_SAMSUNG 96 bool "Samsung SoCs GPIO library support" 97 default y if SAMSUNG_GPIOLIB_4BIT 98 help 99 Say yes here to support Samsung SoCs GPIO library 100 101config GPIO_S5PC100 102 bool "Samsung S5PC100 GPIO library support" 103 default y if CPU_S5PC100 104 help 105 Say yes here to support Samsung S5PC100 SoCs GPIO library 106 107config GPIO_S5PV210 108 bool "Samsung S5PV210/S5PC110 GPIO library support" 109 default y if CPU_S5PV210 110 help 111 Say yes here to support Samsung S5PV210/S5PC110 SoCs GPIO library 112 113config GPIO_PL061 114 bool "PrimeCell PL061 GPIO support" 115 depends on ARM_AMBA 116 help 117 Say yes here to support the PrimeCell PL061 GPIO device 118 119config GPIO_XILINX 120 bool "Xilinx GPIO support" 121 depends on PPC_OF || MICROBLAZE 122 help 123 Say yes here to support the Xilinx FPGA GPIO device 124 125config GPIO_VR41XX 126 tristate "NEC VR4100 series General-purpose I/O Uint support" 127 depends on CPU_VR41XX 128 help 129 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 130 131config GPIO_SCH 132 tristate "Intel SCH/TunnelCreek GPIO" 133 depends on PCI && X86 134 select MFD_CORE 135 select LPC_SCH 136 help 137 Say yes here to support GPIO interface on Intel Poulsbo SCH 138 or Intel Tunnel Creek processor. 139 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 140 powered by the core power rail and are turned off during sleep 141 modes (S3 and higher). The remaining four GPIOs are powered by 142 the Intel SCH suspend power supply. These GPIOs remain 143 active during S3. The suspend powered GPIOs can be used to wake the 144 system from the Suspend-to-RAM state. 145 The Intel Tunnel Creek processor has 5 GPIOs powered by the 146 core power rail and 9 from suspend power supply. 147 148 This driver can also be built as a module. If so, the module 149 will be called sch-gpio. 150 151config GPIO_VX855 152 tristate "VIA VX855/VX875 GPIO" 153 depends on MFD_SUPPORT && PCI 154 select MFD_CORE 155 select MFD_VX855 156 help 157 Support access to the VX855/VX875 GPIO lines through the gpio library. 158 159 This driver provides common support for accessing the device, 160 additional drivers must be enabled in order to use the 161 functionality of the device. 162 163comment "I2C GPIO expanders:" 164 165config GPIO_MAX7300 166 tristate "Maxim MAX7300 GPIO expander" 167 depends on I2C 168 select GPIO_MAX730X 169 help 170 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 171 172config GPIO_MAX732X 173 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 174 depends on I2C 175 help 176 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 177 Port Expanders. Each IO port on these chips has a fixed role of 178 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 179 Input and Output (designed by 'P'). The combinations are listed 180 below: 181 182 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 183 max7322 (4I4O), max7323 (4P4O) 184 185 16 bits: max7324 (8I8O), max7325 (8P8O), 186 max7326 (4I12O), max7327 (4P12O) 187 188 Board setup code must specify the model to use, and the start 189 number for these GPIOs. 190 191config GPIO_MAX732X_IRQ 192 bool "Interrupt controller support for MAX732x" 193 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 194 help 195 Say yes here to enable the max732x to be used as an interrupt 196 controller. It requires the driver to be built in the kernel. 197 198config GPIO_PCA953X 199 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 200 depends on I2C 201 help 202 Say yes here to provide access to several register-oriented 203 SMBus I/O expanders, made mostly by NXP or TI. Compatible 204 models include: 205 206 4 bits: pca9536, pca9537 207 208 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 209 tca6408 210 211 16 bits: pca9535, pca9539, pca9555, tca6416 212 213 This driver can also be built as a module. If so, the module 214 will be called pca953x. 215 216config GPIO_PCA953X_IRQ 217 bool "Interrupt controller support for PCA953x" 218 depends on GPIO_PCA953X=y 219 help 220 Say yes here to enable the pca953x to be used as an interrupt 221 controller. It requires the driver to be built in the kernel. 222 223config GPIO_PCF857X 224 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 225 depends on I2C 226 help 227 Say yes here to provide access to most "quasi-bidirectional" I2C 228 GPIO expanders used for additional digital outputs or inputs. 229 Most of these parts are from NXP, though TI is a second source for 230 some of them. Compatible models include: 231 232 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 233 pca9670, pca9672, pca9674, pca9674a, 234 max7328, max7329 235 236 16 bits: pcf8575, pcf8575c, pca8575, 237 pca9671, pca9673, pca9675 238 239 Your board setup code will need to declare the expanders in 240 use, and assign numbers to the GPIOs they expose. Those GPIOs 241 can then be used from drivers and other kernel code, just like 242 other GPIOs, but only accessible from task contexts. 243 244 This driver provides an in-kernel interface to those GPIOs using 245 platform-neutral GPIO calls. 246 247config GPIO_SX150X 248 bool "Semtech SX150x I2C GPIO expander" 249 depends on I2C=y 250 default n 251 help 252 Say yes here to provide support for Semtech SX150-series I2C 253 GPIO expanders. Compatible models include: 254 255 8 bits: sx1508q 256 16 bits: sx1509q 257 258config GPIO_STMPE 259 bool "STMPE GPIOs" 260 depends on MFD_STMPE 261 help 262 This enables support for the GPIOs found on the STMPE I/O 263 Expanders. 264 265config GPIO_TC3589X 266 bool "TC3589X GPIOs" 267 depends on MFD_TC3589X 268 help 269 This enables support for the GPIOs found on the TC3589X 270 I/O Expander. 271 272config GPIO_TWL4030 273 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 274 depends on TWL4030_CORE 275 help 276 Say yes here to access the GPIO signals of various multi-function 277 power management chips from Texas Instruments. 278 279config GPIO_WM831X 280 tristate "WM831x GPIOs" 281 depends on MFD_WM831X 282 help 283 Say yes here to access the GPIO signals of WM831x power management 284 chips from Wolfson Microelectronics. 285 286config GPIO_WM8350 287 tristate "WM8350 GPIOs" 288 depends on MFD_WM8350 289 help 290 Say yes here to access the GPIO signals of WM8350 power management 291 chips from Wolfson Microelectronics. 292 293config GPIO_WM8994 294 tristate "WM8994 GPIOs" 295 depends on MFD_WM8994 296 help 297 Say yes here to access the GPIO signals of WM8994 audio hub 298 CODECs from Wolfson Microelectronics. 299 300config GPIO_ADP5520 301 tristate "GPIO Support for ADP5520 PMIC" 302 depends on PMIC_ADP5520 303 help 304 This option enables support for on-chip GPIO found 305 on Analog Devices ADP5520 PMICs. 306 307 To compile this driver as a module, choose M here: the module will 308 be called adp5520-gpio. 309 310config GPIO_ADP5588 311 tristate "ADP5588 I2C GPIO expander" 312 depends on I2C 313 help 314 This option enables support for 18 GPIOs found 315 on Analog Devices ADP5588 GPIO Expanders. 316 To compile this driver as a module, choose M here: the module will be 317 called adp5588-gpio. 318 319config GPIO_ADP5588_IRQ 320 bool "Interrupt controller support for ADP5588" 321 depends on GPIO_ADP5588=y 322 help 323 Say yes here to enable the adp5588 to be used as an interrupt 324 controller. It requires the driver to be built in the kernel. 325 326comment "PCI GPIO expanders:" 327 328config GPIO_CS5535 329 tristate "AMD CS5535/CS5536 GPIO support" 330 depends on PCI && X86 && !CS5535_GPIO && MFD_CS5535 331 help 332 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 333 can be used for quite a number of things. The CS5535/6 is found on 334 AMD Geode and Lemote Yeeloong devices. 335 336 If unsure, say N. 337 338config GPIO_BT8XX 339 tristate "BT8XX GPIO abuser" 340 depends on PCI && VIDEO_BT848=n 341 help 342 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 343 as a cheap PCI GPIO card. 344 345 This chip can be found on Miro, Hauppauge and STB TV-cards. 346 347 The card needs to be physically altered for using it as a 348 GPIO card. For more information on how to build a GPIO card 349 from a BT8xx TV card, see the documentation file at 350 Documentation/bt8xxgpio.txt 351 352 If unsure, say N. 353 354config GPIO_LANGWELL 355 bool "Intel Langwell/Penwell GPIO support" 356 depends on PCI && X86 357 help 358 Say Y here to support Intel Langwell/Penwell GPIO. 359 360config GPIO_PCH 361 tristate "PCH GPIO of Intel Topcliff" 362 depends on PCI && X86 363 help 364 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 365 which is an IOH(Input/Output Hub) for x86 embedded processor. 366 This driver can access PCH GPIO device. 367 368config GPIO_ML_IOH 369 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 370 depends on PCI 371 help 372 ML7213 is companion chip for Intel Atom E6xx series. 373 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 374 Hub) which is for IVI(In-Vehicle Infotainment) use. 375 This driver can access the IOH's GPIO device. 376 377config GPIO_TIMBERDALE 378 bool "Support for timberdale GPIO IP" 379 depends on MFD_TIMBERDALE && HAS_IOMEM 380 ---help--- 381 Add support for the GPIO IP in the timberdale FPGA. 382 383config GPIO_RDC321X 384 tristate "RDC R-321x GPIO support" 385 depends on PCI 386 select MFD_SUPPORT 387 select MFD_CORE 388 select MFD_RDC321X 389 help 390 Support for the RDC R321x SoC GPIOs over southbridge 391 PCI configuration space. 392 393comment "SPI GPIO expanders:" 394 395config GPIO_MAX7301 396 tristate "Maxim MAX7301 GPIO expander" 397 depends on SPI_MASTER 398 select GPIO_MAX730X 399 help 400 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 401 402config GPIO_MCP23S08 403 tristate "Microchip MCP23Sxx I/O expander" 404 depends on SPI_MASTER 405 help 406 SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders. 407 This provides a GPIO interface supporting inputs and outputs. 408 409config GPIO_MC33880 410 tristate "Freescale MC33880 high-side/low-side switch" 411 depends on SPI_MASTER 412 help 413 SPI driver for Freescale MC33880 high-side/low-side switch. 414 This provides GPIO interface supporting inputs and outputs. 415 416config GPIO_74X164 417 tristate "74x164 serial-in/parallel-out 8-bits shift register" 418 depends on SPI_MASTER 419 help 420 Platform driver for 74x164 compatible serial-in/parallel-out 421 8-outputs shift registers. This driver can be used to provide access 422 to more gpio outputs. 423 424comment "AC97 GPIO expanders:" 425 426config GPIO_UCB1400 427 bool "Philips UCB1400 GPIO" 428 depends on UCB1400_CORE 429 help 430 This enables support for the Philips UCB1400 GPIO pins. 431 The UCB1400 is an AC97 audio codec. 432 433 To compile this driver as a module, choose M here: the 434 module will be called ucb1400_gpio. 435 436comment "MODULbus GPIO expanders:" 437 438config GPIO_JANZ_TTL 439 tristate "Janz VMOD-TTL Digital IO Module" 440 depends on MFD_JANZ_CMODIO 441 help 442 This enables support for the Janz VMOD-TTL Digital IO module. 443 This driver provides support for driving the pins in output 444 mode only. Input mode is not supported. 445 446config AB8500_GPIO 447 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 448 depends on AB8500_CORE && BROKEN 449 help 450 Select this to enable the AB8500 IC GPIO driver 451endif 452