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 help 142 Say yes here to support the PrimeCell PL061 GPIO device 143 144config GPIO_PXA 145 bool "PXA GPIO support" 146 depends on ARCH_PXA || ARCH_MMP 147 help 148 Say yes here to support the PXA GPIO device 149 150config GPIO_XILINX 151 bool "Xilinx GPIO support" 152 depends on PPC_OF || MICROBLAZE 153 help 154 Say yes here to support the Xilinx FPGA GPIO device 155 156config GPIO_VR41XX 157 tristate "NEC VR4100 series General-purpose I/O Uint support" 158 depends on CPU_VR41XX 159 help 160 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 161 162config GPIO_SCH 163 tristate "Intel SCH/TunnelCreek GPIO" 164 depends on PCI && X86 165 select MFD_CORE 166 select LPC_SCH 167 help 168 Say yes here to support GPIO interface on Intel Poulsbo SCH 169 or Intel Tunnel Creek processor. 170 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 171 powered by the core power rail and are turned off during sleep 172 modes (S3 and higher). The remaining four GPIOs are powered by 173 the Intel SCH suspend power supply. These GPIOs remain 174 active during S3. The suspend powered GPIOs can be used to wake the 175 system from the Suspend-to-RAM state. 176 The Intel Tunnel Creek processor has 5 GPIOs powered by the 177 core power rail and 9 from suspend power supply. 178 179config GPIO_VX855 180 tristate "VIA VX855/VX875 GPIO" 181 depends on PCI 182 select MFD_CORE 183 select MFD_VX855 184 help 185 Support access to the VX855/VX875 GPIO lines through the gpio library. 186 187 This driver provides common support for accessing the device, 188 additional drivers must be enabled in order to use the 189 functionality of the device. 190 191comment "I2C GPIO expanders:" 192 193config GPIO_MAX7300 194 tristate "Maxim MAX7300 GPIO expander" 195 depends on I2C 196 select GPIO_MAX730X 197 help 198 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 199 200config GPIO_MAX732X 201 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 202 depends on I2C 203 help 204 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 205 Port Expanders. Each IO port on these chips has a fixed role of 206 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 207 Input and Output (designed by 'P'). The combinations are listed 208 below: 209 210 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 211 max7322 (4I4O), max7323 (4P4O) 212 213 16 bits: max7324 (8I8O), max7325 (8P8O), 214 max7326 (4I12O), max7327 (4P12O) 215 216 Board setup code must specify the model to use, and the start 217 number for these GPIOs. 218 219config GPIO_MAX732X_IRQ 220 bool "Interrupt controller support for MAX732x" 221 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 222 help 223 Say yes here to enable the max732x to be used as an interrupt 224 controller. It requires the driver to be built in the kernel. 225 226config GPIO_PCA953X 227 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 228 depends on I2C 229 help 230 Say yes here to provide access to several register-oriented 231 SMBus I/O expanders, made mostly by NXP or TI. Compatible 232 models include: 233 234 4 bits: pca9536, pca9537 235 236 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 237 tca6408 238 239 16 bits: pca9535, pca9539, pca9555, tca6416 240 241config GPIO_PCA953X_IRQ 242 bool "Interrupt controller support for PCA953x" 243 depends on GPIO_PCA953X=y 244 help 245 Say yes here to enable the pca953x to be used as an interrupt 246 controller. It requires the driver to be built in the kernel. 247 248config GPIO_PCF857X 249 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 250 depends on I2C 251 help 252 Say yes here to provide access to most "quasi-bidirectional" I2C 253 GPIO expanders used for additional digital outputs or inputs. 254 Most of these parts are from NXP, though TI is a second source for 255 some of them. Compatible models include: 256 257 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 258 pca9670, pca9672, pca9674, pca9674a, 259 max7328, max7329 260 261 16 bits: pcf8575, pcf8575c, pca8575, 262 pca9671, pca9673, pca9675 263 264 Your board setup code will need to declare the expanders in 265 use, and assign numbers to the GPIOs they expose. Those GPIOs 266 can then be used from drivers and other kernel code, just like 267 other GPIOs, but only accessible from task contexts. 268 269 This driver provides an in-kernel interface to those GPIOs using 270 platform-neutral GPIO calls. 271 272config GPIO_SX150X 273 bool "Semtech SX150x I2C GPIO expander" 274 depends on I2C=y 275 default n 276 help 277 Say yes here to provide support for Semtech SX150-series I2C 278 GPIO expanders. Compatible models include: 279 280 8 bits: sx1508q 281 16 bits: sx1509q 282 283config GPIO_STMPE 284 bool "STMPE GPIOs" 285 depends on MFD_STMPE 286 help 287 This enables support for the GPIOs found on the STMPE I/O 288 Expanders. 289 290config GPIO_TC3589X 291 bool "TC3589X GPIOs" 292 depends on MFD_TC3589X 293 help 294 This enables support for the GPIOs found on the TC3589X 295 I/O Expander. 296 297config GPIO_TPS65912 298 tristate "TI TPS65912 GPIO" 299 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 300 help 301 This driver supports TPS65912 gpio chip 302 303config GPIO_TWL4030 304 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 305 depends on TWL4030_CORE 306 help 307 Say yes here to access the GPIO signals of various multi-function 308 power management chips from Texas Instruments. 309 310config GPIO_WM831X 311 tristate "WM831x GPIOs" 312 depends on MFD_WM831X 313 help 314 Say yes here to access the GPIO signals of WM831x power management 315 chips from Wolfson Microelectronics. 316 317config GPIO_WM8350 318 tristate "WM8350 GPIOs" 319 depends on MFD_WM8350 320 help 321 Say yes here to access the GPIO signals of WM8350 power management 322 chips from Wolfson Microelectronics. 323 324config GPIO_WM8994 325 tristate "WM8994 GPIOs" 326 depends on MFD_WM8994 327 help 328 Say yes here to access the GPIO signals of WM8994 audio hub 329 CODECs from Wolfson Microelectronics. 330 331config GPIO_ADP5520 332 tristate "GPIO Support for ADP5520 PMIC" 333 depends on PMIC_ADP5520 334 help 335 This option enables support for on-chip GPIO found 336 on Analog Devices ADP5520 PMICs. 337 338config GPIO_ADP5588 339 tristate "ADP5588 I2C GPIO expander" 340 depends on I2C 341 help 342 This option enables support for 18 GPIOs found 343 on Analog Devices ADP5588 GPIO Expanders. 344 345config GPIO_ADP5588_IRQ 346 bool "Interrupt controller support for ADP5588" 347 depends on GPIO_ADP5588=y 348 help 349 Say yes here to enable the adp5588 to be used as an interrupt 350 controller. It requires the driver to be built in the kernel. 351 352comment "PCI GPIO expanders:" 353 354config GPIO_CS5535 355 tristate "AMD CS5535/CS5536 GPIO support" 356 depends on PCI && X86 && MFD_CS5535 357 help 358 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 359 can be used for quite a number of things. The CS5535/6 is found on 360 AMD Geode and Lemote Yeeloong devices. 361 362 If unsure, say N. 363 364config GPIO_BT8XX 365 tristate "BT8XX GPIO abuser" 366 depends on PCI && VIDEO_BT848=n 367 help 368 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 369 as a cheap PCI GPIO card. 370 371 This chip can be found on Miro, Hauppauge and STB TV-cards. 372 373 The card needs to be physically altered for using it as a 374 GPIO card. For more information on how to build a GPIO card 375 from a BT8xx TV card, see the documentation file at 376 Documentation/bt8xxgpio.txt 377 378 If unsure, say N. 379 380config GPIO_LANGWELL 381 bool "Intel Langwell/Penwell GPIO support" 382 depends on PCI && X86 383 help 384 Say Y here to support Intel Langwell/Penwell GPIO. 385 386config GPIO_PCH 387 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 388 depends on PCI && X86 389 select GENERIC_IRQ_CHIP 390 help 391 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 392 which is an IOH(Input/Output Hub) for x86 embedded processor. 393 This driver can access PCH GPIO device. 394 395 This driver also can be used for LAPIS Semiconductor IOH(Input/ 396 Output Hub), ML7223 and ML7831. 397 ML7223 IOH is for MP(Media Phone) use. 398 ML7831 IOH is for general purpose use. 399 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 400 ML7223/ML7831 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 select GENERIC_IRQ_CHIP 406 help 407 ML7213 is companion chip for Intel Atom E6xx series. 408 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 409 Hub) which is for IVI(In-Vehicle Infotainment) use. 410 This driver can access the IOH's GPIO device. 411 412config GPIO_TIMBERDALE 413 bool "Support for timberdale GPIO IP" 414 depends on MFD_TIMBERDALE && HAS_IOMEM 415 ---help--- 416 Add support for the GPIO IP in the timberdale FPGA. 417 418config GPIO_RDC321X 419 tristate "RDC R-321x GPIO support" 420 depends on PCI 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