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 depends on X86 # unconditional access to IO space. 91 help 92 Say yes here to support GPIO functionality of IT8761E super I/O chip. 93 94config GPIO_EP93XX 95 def_bool y 96 depends on ARCH_EP93XX 97 select GPIO_GENERIC 98 99config GPIO_MPC5200 100 def_bool y 101 depends on PPC_MPC52xx 102 103config GPIO_MPC8XXX 104 bool "MPC512x/MPC8xxx GPIO support" 105 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 106 FSL_SOC_BOOKE || PPC_86xx 107 help 108 Say Y here if you're going to use hardware that connects to the 109 MPC512x/831x/834x/837x/8572/8610 GPIOs. 110 111config GPIO_MSM_V1 112 tristate "Qualcomm MSM GPIO v1" 113 depends on GPIOLIB && ARCH_MSM 114 help 115 Say yes here to support the GPIO interface on ARM v6 based 116 Qualcomm MSM chips. Most of the pins on the MSM can be 117 selected for GPIO, and are controlled by this driver. 118 119config GPIO_MSM_V2 120 tristate "Qualcomm MSM GPIO v2" 121 depends on GPIOLIB && ARCH_MSM 122 help 123 Say yes here to support the GPIO interface on ARM v7 based 124 Qualcomm MSM chips. Most of the pins on the MSM can be 125 selected for GPIO, and are controlled by this driver. 126 127config GPIO_MXC 128 def_bool y 129 depends on ARCH_MXC 130 select GPIO_GENERIC 131 select GENERIC_IRQ_CHIP 132 133config GPIO_MXS 134 def_bool y 135 depends on ARCH_MXS 136 select GPIO_GENERIC 137 select GENERIC_IRQ_CHIP 138 139config GPIO_PL061 140 bool "PrimeCell PL061 GPIO support" 141 depends on ARM_AMBA 142 select GENERIC_IRQ_CHIP 143 help 144 Say yes here to support the PrimeCell PL061 GPIO device 145 146config GPIO_PXA 147 bool "PXA GPIO support" 148 depends on ARCH_PXA || ARCH_MMP 149 help 150 Say yes here to support the PXA 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 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_MC9S08DZ60 229 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" 230 depends on I2C && MACH_MX35_3DS 231 help 232 Select this to enable the MC9S08DZ60 GPIO driver 233 234config GPIO_PCA953X 235 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 236 depends on I2C 237 help 238 Say yes here to provide access to several register-oriented 239 SMBus I/O expanders, made mostly by NXP or TI. Compatible 240 models include: 241 242 4 bits: pca9536, pca9537 243 244 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 245 tca6408 246 247 16 bits: pca9535, pca9539, pca9555, tca6416 248 249config GPIO_PCA953X_IRQ 250 bool "Interrupt controller support for PCA953x" 251 depends on GPIO_PCA953X=y 252 help 253 Say yes here to enable the pca953x to be used as an interrupt 254 controller. It requires the driver to be built in the kernel. 255 256config GPIO_PCF857X 257 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 258 depends on I2C 259 help 260 Say yes here to provide access to most "quasi-bidirectional" I2C 261 GPIO expanders used for additional digital outputs or inputs. 262 Most of these parts are from NXP, though TI is a second source for 263 some of them. Compatible models include: 264 265 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 266 pca9670, pca9672, pca9674, pca9674a, 267 max7328, max7329 268 269 16 bits: pcf8575, pcf8575c, pca8575, 270 pca9671, pca9673, pca9675 271 272 Your board setup code will need to declare the expanders in 273 use, and assign numbers to the GPIOs they expose. Those GPIOs 274 can then be used from drivers and other kernel code, just like 275 other GPIOs, but only accessible from task contexts. 276 277 This driver provides an in-kernel interface to those GPIOs using 278 platform-neutral GPIO calls. 279 280config GPIO_SX150X 281 bool "Semtech SX150x I2C GPIO expander" 282 depends on I2C=y 283 default n 284 help 285 Say yes here to provide support for Semtech SX150-series I2C 286 GPIO expanders. Compatible models include: 287 288 8 bits: sx1508q 289 16 bits: sx1509q 290 291config GPIO_STMPE 292 bool "STMPE GPIOs" 293 depends on MFD_STMPE 294 help 295 This enables support for the GPIOs found on the STMPE I/O 296 Expanders. 297 298config GPIO_TC3589X 299 bool "TC3589X GPIOs" 300 depends on MFD_TC3589X 301 help 302 This enables support for the GPIOs found on the TC3589X 303 I/O Expander. 304 305config GPIO_TPS65912 306 tristate "TI TPS65912 GPIO" 307 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 308 help 309 This driver supports TPS65912 gpio chip 310 311config GPIO_TWL4030 312 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 313 depends on TWL4030_CORE 314 help 315 Say yes here to access the GPIO signals of various multi-function 316 power management chips from Texas Instruments. 317 318config GPIO_WM831X 319 tristate "WM831x GPIOs" 320 depends on MFD_WM831X 321 help 322 Say yes here to access the GPIO signals of WM831x power management 323 chips from Wolfson Microelectronics. 324 325config GPIO_WM8350 326 tristate "WM8350 GPIOs" 327 depends on MFD_WM8350 328 help 329 Say yes here to access the GPIO signals of WM8350 power management 330 chips from Wolfson Microelectronics. 331 332config GPIO_WM8994 333 tristate "WM8994 GPIOs" 334 depends on MFD_WM8994 335 help 336 Say yes here to access the GPIO signals of WM8994 audio hub 337 CODECs from Wolfson Microelectronics. 338 339config GPIO_ADP5520 340 tristate "GPIO Support for ADP5520 PMIC" 341 depends on PMIC_ADP5520 342 help 343 This option enables support for on-chip GPIO found 344 on Analog Devices ADP5520 PMICs. 345 346config GPIO_ADP5588 347 tristate "ADP5588 I2C GPIO expander" 348 depends on I2C 349 help 350 This option enables support for 18 GPIOs found 351 on Analog Devices ADP5588 GPIO Expanders. 352 353config GPIO_ADP5588_IRQ 354 bool "Interrupt controller support for ADP5588" 355 depends on GPIO_ADP5588=y 356 help 357 Say yes here to enable the adp5588 to be used as an interrupt 358 controller. It requires the driver to be built in the kernel. 359 360comment "PCI GPIO expanders:" 361 362config GPIO_CS5535 363 tristate "AMD CS5535/CS5536 GPIO support" 364 depends on PCI && X86 && MFD_CS5535 365 help 366 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 367 can be used for quite a number of things. The CS5535/6 is found on 368 AMD Geode and Lemote Yeeloong devices. 369 370 If unsure, say N. 371 372config GPIO_BT8XX 373 tristate "BT8XX GPIO abuser" 374 depends on PCI && VIDEO_BT848=n 375 help 376 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 377 as a cheap PCI GPIO card. 378 379 This chip can be found on Miro, Hauppauge and STB TV-cards. 380 381 The card needs to be physically altered for using it as a 382 GPIO card. For more information on how to build a GPIO card 383 from a BT8xx TV card, see the documentation file at 384 Documentation/bt8xxgpio.txt 385 386 If unsure, say N. 387 388config GPIO_LANGWELL 389 bool "Intel Langwell/Penwell GPIO support" 390 depends on PCI && X86 391 help 392 Say Y here to support Intel Langwell/Penwell GPIO. 393 394config GPIO_PCH 395 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 396 depends on PCI && X86 397 select GENERIC_IRQ_CHIP 398 help 399 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 400 which is an IOH(Input/Output Hub) for x86 embedded processor. 401 This driver can access PCH GPIO device. 402 403 This driver also can be used for LAPIS Semiconductor IOH(Input/ 404 Output Hub), ML7223 and ML7831. 405 ML7223 IOH is for MP(Media Phone) use. 406 ML7831 IOH is for general purpose use. 407 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 408 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 409 410config GPIO_ML_IOH 411 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 412 depends on PCI 413 select GENERIC_IRQ_CHIP 414 help 415 ML7213 is companion chip for Intel Atom E6xx series. 416 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 417 Hub) which is for IVI(In-Vehicle Infotainment) use. 418 This driver can access the IOH's GPIO device. 419 420config GPIO_SODAVILLE 421 bool "Intel Sodaville GPIO support" 422 depends on X86 && PCI && OF 423 select GPIO_GENERIC 424 select GENERIC_IRQ_CHIP 425 help 426 Say Y here to support Intel Sodaville GPIO. 427 428config GPIO_TIMBERDALE 429 bool "Support for timberdale GPIO IP" 430 depends on MFD_TIMBERDALE && HAS_IOMEM 431 ---help--- 432 Add support for the GPIO IP in the timberdale FPGA. 433 434config GPIO_RDC321X 435 tristate "RDC R-321x GPIO support" 436 depends on PCI 437 select MFD_CORE 438 select MFD_RDC321X 439 help 440 Support for the RDC R321x SoC GPIOs over southbridge 441 PCI configuration space. 442 443comment "SPI GPIO expanders:" 444 445config GPIO_MAX7301 446 tristate "Maxim MAX7301 GPIO expander" 447 depends on SPI_MASTER 448 select GPIO_MAX730X 449 help 450 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 451 452config GPIO_MCP23S08 453 tristate "Microchip MCP23xxx I/O expander" 454 depends on SPI_MASTER || I2C 455 help 456 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 457 I/O expanders. 458 This provides a GPIO interface supporting inputs and outputs. 459 460config GPIO_MC33880 461 tristate "Freescale MC33880 high-side/low-side switch" 462 depends on SPI_MASTER 463 help 464 SPI driver for Freescale MC33880 high-side/low-side switch. 465 This provides GPIO interface supporting inputs and outputs. 466 467config GPIO_74X164 468 tristate "74x164 serial-in/parallel-out 8-bits shift register" 469 depends on SPI_MASTER 470 help 471 Platform driver for 74x164 compatible serial-in/parallel-out 472 8-outputs shift registers. This driver can be used to provide access 473 to more gpio outputs. 474 475comment "AC97 GPIO expanders:" 476 477config GPIO_UCB1400 478 bool "Philips UCB1400 GPIO" 479 depends on UCB1400_CORE 480 help 481 This enables support for the Philips UCB1400 GPIO pins. 482 The UCB1400 is an AC97 audio codec. 483 484comment "MODULbus GPIO expanders:" 485 486config GPIO_JANZ_TTL 487 tristate "Janz VMOD-TTL Digital IO Module" 488 depends on MFD_JANZ_CMODIO 489 help 490 This enables support for the Janz VMOD-TTL Digital IO module. 491 This driver provides support for driving the pins in output 492 mode only. Input mode is not supported. 493 494config GPIO_AB8500 495 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 496 depends on AB8500_CORE && BROKEN 497 help 498 Select this to enable the AB8500 IC GPIO driver 499 500config GPIO_TPS65910 501 bool "TPS65910 GPIO" 502 depends on MFD_TPS65910 503 help 504 Select this option to enable GPIO driver for the TPS65910 505 chip family. 506endif 507