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_EM 95 tristate "Emma Mobile GPIO" 96 depends on ARM 97 help 98 Say yes here to support GPIO on Renesas Emma Mobile SoCs. 99 100config GPIO_EP93XX 101 def_bool y 102 depends on ARCH_EP93XX 103 select GPIO_GENERIC 104 105config GPIO_MPC5200 106 def_bool y 107 depends on PPC_MPC52xx 108 109config GPIO_MPC8XXX 110 bool "MPC512x/MPC8xxx GPIO support" 111 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 112 FSL_SOC_BOOKE || PPC_86xx 113 help 114 Say Y here if you're going to use hardware that connects to the 115 MPC512x/831x/834x/837x/8572/8610 GPIOs. 116 117config GPIO_MSM_V1 118 tristate "Qualcomm MSM GPIO v1" 119 depends on GPIOLIB && ARCH_MSM 120 help 121 Say yes here to support the GPIO interface on ARM v6 based 122 Qualcomm MSM chips. Most of the pins on the MSM can be 123 selected for GPIO, and are controlled by this driver. 124 125config GPIO_MSM_V2 126 tristate "Qualcomm MSM GPIO v2" 127 depends on GPIOLIB && ARCH_MSM 128 help 129 Say yes here to support the GPIO interface on ARM v7 based 130 Qualcomm MSM chips. Most of the pins on the MSM can be 131 selected for GPIO, and are controlled by this driver. 132 133config GPIO_MXC 134 def_bool y 135 depends on ARCH_MXC 136 select GPIO_GENERIC 137 select GENERIC_IRQ_CHIP 138 139config GPIO_MXS 140 def_bool y 141 depends on ARCH_MXS 142 select GPIO_GENERIC 143 select GENERIC_IRQ_CHIP 144 145config GPIO_PL061 146 bool "PrimeCell PL061 GPIO support" 147 depends on ARM_AMBA 148 select GENERIC_IRQ_CHIP 149 help 150 Say yes here to support the PrimeCell PL061 GPIO device 151 152config GPIO_PXA 153 bool "PXA GPIO support" 154 depends on ARCH_PXA || ARCH_MMP 155 help 156 Say yes here to support the PXA GPIO device 157 158config GPIO_XILINX 159 bool "Xilinx GPIO support" 160 depends on PPC_OF || MICROBLAZE 161 help 162 Say yes here to support the Xilinx FPGA GPIO device 163 164config GPIO_VR41XX 165 tristate "NEC VR4100 series General-purpose I/O Uint support" 166 depends on CPU_VR41XX 167 help 168 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 169 170config GPIO_SCH 171 tristate "Intel SCH/TunnelCreek GPIO" 172 depends on PCI && X86 173 select MFD_CORE 174 select LPC_SCH 175 help 176 Say yes here to support GPIO interface on Intel Poulsbo SCH 177 or Intel Tunnel Creek processor. 178 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 179 powered by the core power rail and are turned off during sleep 180 modes (S3 and higher). The remaining four GPIOs are powered by 181 the Intel SCH suspend power supply. These GPIOs remain 182 active during S3. The suspend powered GPIOs can be used to wake the 183 system from the Suspend-to-RAM state. 184 The Intel Tunnel Creek processor has 5 GPIOs powered by the 185 core power rail and 9 from suspend power supply. 186 187config GPIO_VX855 188 tristate "VIA VX855/VX875 GPIO" 189 depends on PCI 190 select MFD_CORE 191 select MFD_VX855 192 help 193 Support access to the VX855/VX875 GPIO lines through the gpio library. 194 195 This driver provides common support for accessing the device, 196 additional drivers must be enabled in order to use the 197 functionality of the device. 198 199config GPIO_GE_FPGA 200 bool "GE FPGA based GPIO" 201 depends on GE_FPGA 202 help 203 Support for common GPIO functionality provided on some GE Single Board 204 Computers. 205 206 This driver provides basic support (configure as input or output, read 207 and write pin state) for GPIO implemented in a number of GE single 208 board computers. 209 210comment "I2C GPIO expanders:" 211 212config GPIO_MAX7300 213 tristate "Maxim MAX7300 GPIO expander" 214 depends on I2C 215 select GPIO_MAX730X 216 help 217 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 218 219config GPIO_MAX732X 220 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 221 depends on I2C 222 help 223 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 224 Port Expanders. Each IO port on these chips has a fixed role of 225 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 226 Input and Output (designed by 'P'). The combinations are listed 227 below: 228 229 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 230 max7322 (4I4O), max7323 (4P4O) 231 232 16 bits: max7324 (8I8O), max7325 (8P8O), 233 max7326 (4I12O), max7327 (4P12O) 234 235 Board setup code must specify the model to use, and the start 236 number for these GPIOs. 237 238config GPIO_MAX732X_IRQ 239 bool "Interrupt controller support for MAX732x" 240 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 241 help 242 Say yes here to enable the max732x to be used as an interrupt 243 controller. It requires the driver to be built in the kernel. 244 245config GPIO_MC9S08DZ60 246 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" 247 depends on I2C && MACH_MX35_3DS 248 help 249 Select this to enable the MC9S08DZ60 GPIO driver 250 251config GPIO_PCA953X 252 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 253 depends on I2C 254 help 255 Say yes here to provide access to several register-oriented 256 SMBus I/O expanders, made mostly by NXP or TI. Compatible 257 models include: 258 259 4 bits: pca9536, pca9537 260 261 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 262 tca6408 263 264 16 bits: pca9535, pca9539, pca9555, tca6416 265 266config GPIO_PCA953X_IRQ 267 bool "Interrupt controller support for PCA953x" 268 depends on GPIO_PCA953X=y 269 help 270 Say yes here to enable the pca953x to be used as an interrupt 271 controller. It requires the driver to be built in the kernel. 272 273config GPIO_PCF857X 274 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 275 depends on I2C 276 help 277 Say yes here to provide access to most "quasi-bidirectional" I2C 278 GPIO expanders used for additional digital outputs or inputs. 279 Most of these parts are from NXP, though TI is a second source for 280 some of them. Compatible models include: 281 282 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 283 pca9670, pca9672, pca9674, pca9674a, 284 max7328, max7329 285 286 16 bits: pcf8575, pcf8575c, pca8575, 287 pca9671, pca9673, pca9675 288 289 Your board setup code will need to declare the expanders in 290 use, and assign numbers to the GPIOs they expose. Those GPIOs 291 can then be used from drivers and other kernel code, just like 292 other GPIOs, but only accessible from task contexts. 293 294 This driver provides an in-kernel interface to those GPIOs using 295 platform-neutral GPIO calls. 296 297config GPIO_SX150X 298 bool "Semtech SX150x I2C GPIO expander" 299 depends on I2C=y 300 default n 301 help 302 Say yes here to provide support for Semtech SX150-series I2C 303 GPIO expanders. Compatible models include: 304 305 8 bits: sx1508q 306 16 bits: sx1509q 307 308config GPIO_STMPE 309 bool "STMPE GPIOs" 310 depends on MFD_STMPE 311 help 312 This enables support for the GPIOs found on the STMPE I/O 313 Expanders. 314 315config GPIO_TC3589X 316 bool "TC3589X GPIOs" 317 depends on MFD_TC3589X 318 help 319 This enables support for the GPIOs found on the TC3589X 320 I/O Expander. 321 322config GPIO_TPS65912 323 tristate "TI TPS65912 GPIO" 324 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 325 help 326 This driver supports TPS65912 gpio chip 327 328config GPIO_TWL4030 329 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 330 depends on TWL4030_CORE 331 help 332 Say yes here to access the GPIO signals of various multi-function 333 power management chips from Texas Instruments. 334 335config GPIO_WM831X 336 tristate "WM831x GPIOs" 337 depends on MFD_WM831X 338 help 339 Say yes here to access the GPIO signals of WM831x power management 340 chips from Wolfson Microelectronics. 341 342config GPIO_WM8350 343 tristate "WM8350 GPIOs" 344 depends on MFD_WM8350 345 help 346 Say yes here to access the GPIO signals of WM8350 power management 347 chips from Wolfson Microelectronics. 348 349config GPIO_WM8994 350 tristate "WM8994 GPIOs" 351 depends on MFD_WM8994 352 help 353 Say yes here to access the GPIO signals of WM8994 audio hub 354 CODECs from Wolfson Microelectronics. 355 356config GPIO_ADP5520 357 tristate "GPIO Support for ADP5520 PMIC" 358 depends on PMIC_ADP5520 359 help 360 This option enables support for on-chip GPIO found 361 on Analog Devices ADP5520 PMICs. 362 363config GPIO_ADP5588 364 tristate "ADP5588 I2C GPIO expander" 365 depends on I2C 366 help 367 This option enables support for 18 GPIOs found 368 on Analog Devices ADP5588 GPIO Expanders. 369 370config GPIO_ADP5588_IRQ 371 bool "Interrupt controller support for ADP5588" 372 depends on GPIO_ADP5588=y 373 help 374 Say yes here to enable the adp5588 to be used as an interrupt 375 controller. It requires the driver to be built in the kernel. 376 377comment "PCI GPIO expanders:" 378 379config GPIO_CS5535 380 tristate "AMD CS5535/CS5536 GPIO support" 381 depends on PCI && X86 && MFD_CS5535 382 help 383 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 384 can be used for quite a number of things. The CS5535/6 is found on 385 AMD Geode and Lemote Yeeloong devices. 386 387 If unsure, say N. 388 389config GPIO_BT8XX 390 tristate "BT8XX GPIO abuser" 391 depends on PCI && VIDEO_BT848=n 392 help 393 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 394 as a cheap PCI GPIO card. 395 396 This chip can be found on Miro, Hauppauge and STB TV-cards. 397 398 The card needs to be physically altered for using it as a 399 GPIO card. For more information on how to build a GPIO card 400 from a BT8xx TV card, see the documentation file at 401 Documentation/bt8xxgpio.txt 402 403 If unsure, say N. 404 405config GPIO_LANGWELL 406 bool "Intel Langwell/Penwell GPIO support" 407 depends on PCI && X86 408 help 409 Say Y here to support Intel Langwell/Penwell GPIO. 410 411config GPIO_PCH 412 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 413 depends on PCI && X86 414 select GENERIC_IRQ_CHIP 415 help 416 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 417 which is an IOH(Input/Output Hub) for x86 embedded processor. 418 This driver can access PCH GPIO device. 419 420 This driver also can be used for LAPIS Semiconductor IOH(Input/ 421 Output Hub), ML7223 and ML7831. 422 ML7223 IOH is for MP(Media Phone) use. 423 ML7831 IOH is for general purpose use. 424 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 425 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 426 427config GPIO_ML_IOH 428 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 429 depends on PCI 430 select GENERIC_IRQ_CHIP 431 help 432 ML7213 is companion chip for Intel Atom E6xx series. 433 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 434 Hub) which is for IVI(In-Vehicle Infotainment) use. 435 This driver can access the IOH's GPIO device. 436 437config GPIO_SODAVILLE 438 bool "Intel Sodaville GPIO support" 439 depends on X86 && PCI && OF 440 select GPIO_GENERIC 441 select GENERIC_IRQ_CHIP 442 help 443 Say Y here to support Intel Sodaville GPIO. 444 445config GPIO_TIMBERDALE 446 bool "Support for timberdale GPIO IP" 447 depends on MFD_TIMBERDALE && HAS_IOMEM 448 ---help--- 449 Add support for the GPIO IP in the timberdale FPGA. 450 451config GPIO_RDC321X 452 tristate "RDC R-321x GPIO support" 453 depends on PCI 454 select MFD_CORE 455 select MFD_RDC321X 456 help 457 Support for the RDC R321x SoC GPIOs over southbridge 458 PCI configuration space. 459 460comment "SPI GPIO expanders:" 461 462config GPIO_MAX7301 463 tristate "Maxim MAX7301 GPIO expander" 464 depends on SPI_MASTER 465 select GPIO_MAX730X 466 help 467 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 468 469config GPIO_MCP23S08 470 tristate "Microchip MCP23xxx I/O expander" 471 depends on SPI_MASTER || I2C 472 help 473 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 474 I/O expanders. 475 This provides a GPIO interface supporting inputs and outputs. 476 477config GPIO_MC33880 478 tristate "Freescale MC33880 high-side/low-side switch" 479 depends on SPI_MASTER 480 help 481 SPI driver for Freescale MC33880 high-side/low-side switch. 482 This provides GPIO interface supporting inputs and outputs. 483 484config GPIO_74X164 485 tristate "74x164 serial-in/parallel-out 8-bits shift register" 486 depends on SPI_MASTER 487 help 488 Platform driver for 74x164 compatible serial-in/parallel-out 489 8-outputs shift registers. This driver can be used to provide access 490 to more gpio outputs. 491 492comment "AC97 GPIO expanders:" 493 494config GPIO_UCB1400 495 bool "Philips UCB1400 GPIO" 496 depends on UCB1400_CORE 497 help 498 This enables support for the Philips UCB1400 GPIO pins. 499 The UCB1400 is an AC97 audio codec. 500 501comment "MODULbus GPIO expanders:" 502 503config GPIO_JANZ_TTL 504 tristate "Janz VMOD-TTL Digital IO Module" 505 depends on MFD_JANZ_CMODIO 506 help 507 This enables support for the Janz VMOD-TTL Digital IO module. 508 This driver provides support for driving the pins in output 509 mode only. Input mode is not supported. 510 511config GPIO_AB8500 512 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 513 depends on AB8500_CORE && BROKEN 514 help 515 Select this to enable the AB8500 IC GPIO driver 516 517config GPIO_TPS65910 518 bool "TPS65910 GPIO" 519 depends on MFD_TPS65910 520 help 521 Select this option to enable GPIO driver for the TPS65910 522 chip family. 523endif 524