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_STA2X11 153 bool "STA2x11/ConneXt GPIO support" 154 depends on MFD_STA2X11 155 select GENERIC_IRQ_CHIP 156 help 157 Say yes here to support the STA2x11/ConneXt GPIO device. 158 The GPIO module has 128 GPIO pins with alternate functions. 159 160config GPIO_XILINX 161 bool "Xilinx GPIO support" 162 depends on PPC_OF || MICROBLAZE 163 help 164 Say yes here to support the Xilinx FPGA GPIO device 165 166config GPIO_VR41XX 167 tristate "NEC VR4100 series General-purpose I/O Uint support" 168 depends on CPU_VR41XX 169 help 170 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 171 172config GPIO_SCH 173 tristate "Intel SCH/TunnelCreek GPIO" 174 depends on PCI && X86 175 select MFD_CORE 176 select LPC_SCH 177 help 178 Say yes here to support GPIO interface on Intel Poulsbo SCH 179 or Intel Tunnel Creek processor. 180 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 181 powered by the core power rail and are turned off during sleep 182 modes (S3 and higher). The remaining four GPIOs are powered by 183 the Intel SCH suspend power supply. These GPIOs remain 184 active during S3. The suspend powered GPIOs can be used to wake the 185 system from the Suspend-to-RAM state. 186 The Intel Tunnel Creek processor has 5 GPIOs powered by the 187 core power rail and 9 from suspend power supply. 188 189config GPIO_ICH 190 tristate "Intel ICH GPIO" 191 depends on PCI && X86 192 select MFD_CORE 193 select LPC_ICH 194 help 195 Say yes here to support the GPIO functionality of a number of Intel 196 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8 197 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg 198 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake). 199 200 If unsure, say N. 201 202config GPIO_VX855 203 tristate "VIA VX855/VX875 GPIO" 204 depends on PCI 205 select MFD_CORE 206 select MFD_VX855 207 help 208 Support access to the VX855/VX875 GPIO lines through the gpio library. 209 210 This driver provides common support for accessing the device, 211 additional drivers must be enabled in order to use the 212 functionality of the device. 213 214config GPIO_GE_FPGA 215 bool "GE FPGA based GPIO" 216 depends on GE_FPGA 217 help 218 Support for common GPIO functionality provided on some GE Single Board 219 Computers. 220 221 This driver provides basic support (configure as input or output, read 222 and write pin state) for GPIO implemented in a number of GE single 223 board computers. 224 225comment "I2C GPIO expanders:" 226 227config GPIO_MAX7300 228 tristate "Maxim MAX7300 GPIO expander" 229 depends on I2C 230 select GPIO_MAX730X 231 help 232 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 233 234config GPIO_MAX732X 235 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 236 depends on I2C 237 help 238 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 239 Port Expanders. Each IO port on these chips has a fixed role of 240 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 241 Input and Output (designed by 'P'). The combinations are listed 242 below: 243 244 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 245 max7322 (4I4O), max7323 (4P4O) 246 247 16 bits: max7324 (8I8O), max7325 (8P8O), 248 max7326 (4I12O), max7327 (4P12O) 249 250 Board setup code must specify the model to use, and the start 251 number for these GPIOs. 252 253config GPIO_MAX732X_IRQ 254 bool "Interrupt controller support for MAX732x" 255 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 256 help 257 Say yes here to enable the max732x to be used as an interrupt 258 controller. It requires the driver to be built in the kernel. 259 260config GPIO_MC9S08DZ60 261 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" 262 depends on I2C && MACH_MX35_3DS 263 help 264 Select this to enable the MC9S08DZ60 GPIO driver 265 266config GPIO_PCA953X 267 tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" 268 depends on I2C 269 help 270 Say yes here to provide access to several register-oriented 271 SMBus I/O expanders, made mostly by NXP or TI. Compatible 272 models include: 273 274 4 bits: pca9536, pca9537 275 276 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, 277 tca6408 278 279 16 bits: pca9535, pca9539, pca9555, tca6416 280 281config GPIO_PCA953X_IRQ 282 bool "Interrupt controller support for PCA953x" 283 depends on GPIO_PCA953X=y 284 help 285 Say yes here to enable the pca953x to be used as an interrupt 286 controller. It requires the driver to be built in the kernel. 287 288config GPIO_PCF857X 289 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 290 depends on I2C 291 help 292 Say yes here to provide access to most "quasi-bidirectional" I2C 293 GPIO expanders used for additional digital outputs or inputs. 294 Most of these parts are from NXP, though TI is a second source for 295 some of them. Compatible models include: 296 297 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 298 pca9670, pca9672, pca9674, pca9674a, 299 max7328, max7329 300 301 16 bits: pcf8575, pcf8575c, pca8575, 302 pca9671, pca9673, pca9675 303 304 Your board setup code will need to declare the expanders in 305 use, and assign numbers to the GPIOs they expose. Those GPIOs 306 can then be used from drivers and other kernel code, just like 307 other GPIOs, but only accessible from task contexts. 308 309 This driver provides an in-kernel interface to those GPIOs using 310 platform-neutral GPIO calls. 311 312config GPIO_SX150X 313 bool "Semtech SX150x I2C GPIO expander" 314 depends on I2C=y 315 default n 316 help 317 Say yes here to provide support for Semtech SX150-series I2C 318 GPIO expanders. Compatible models include: 319 320 8 bits: sx1508q 321 16 bits: sx1509q 322 323config GPIO_STMPE 324 bool "STMPE GPIOs" 325 depends on MFD_STMPE 326 help 327 This enables support for the GPIOs found on the STMPE I/O 328 Expanders. 329 330config GPIO_TC3589X 331 bool "TC3589X GPIOs" 332 depends on MFD_TC3589X 333 help 334 This enables support for the GPIOs found on the TC3589X 335 I/O Expander. 336 337config GPIO_TPS65912 338 tristate "TI TPS65912 GPIO" 339 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 340 help 341 This driver supports TPS65912 gpio chip 342 343config GPIO_TWL4030 344 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 345 depends on TWL4030_CORE 346 help 347 Say yes here to access the GPIO signals of various multi-function 348 power management chips from Texas Instruments. 349 350config GPIO_WM831X 351 tristate "WM831x GPIOs" 352 depends on MFD_WM831X 353 help 354 Say yes here to access the GPIO signals of WM831x power management 355 chips from Wolfson Microelectronics. 356 357config GPIO_WM8350 358 tristate "WM8350 GPIOs" 359 depends on MFD_WM8350 360 help 361 Say yes here to access the GPIO signals of WM8350 power management 362 chips from Wolfson Microelectronics. 363 364config GPIO_WM8994 365 tristate "WM8994 GPIOs" 366 depends on MFD_WM8994 367 help 368 Say yes here to access the GPIO signals of WM8994 audio hub 369 CODECs from Wolfson Microelectronics. 370 371config GPIO_ADP5520 372 tristate "GPIO Support for ADP5520 PMIC" 373 depends on PMIC_ADP5520 374 help 375 This option enables support for on-chip GPIO found 376 on Analog Devices ADP5520 PMICs. 377 378config GPIO_ADP5588 379 tristate "ADP5588 I2C GPIO expander" 380 depends on I2C 381 help 382 This option enables support for 18 GPIOs found 383 on Analog Devices ADP5588 GPIO Expanders. 384 385config GPIO_ADP5588_IRQ 386 bool "Interrupt controller support for ADP5588" 387 depends on GPIO_ADP5588=y 388 help 389 Say yes here to enable the adp5588 to be used as an interrupt 390 controller. It requires the driver to be built in the kernel. 391 392comment "PCI GPIO expanders:" 393 394config GPIO_CS5535 395 tristate "AMD CS5535/CS5536 GPIO support" 396 depends on PCI && X86 && MFD_CS5535 397 help 398 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 399 can be used for quite a number of things. The CS5535/6 is found on 400 AMD Geode and Lemote Yeeloong devices. 401 402 If unsure, say N. 403 404config GPIO_BT8XX 405 tristate "BT8XX GPIO abuser" 406 depends on PCI && VIDEO_BT848=n 407 help 408 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 409 as a cheap PCI GPIO card. 410 411 This chip can be found on Miro, Hauppauge and STB TV-cards. 412 413 The card needs to be physically altered for using it as a 414 GPIO card. For more information on how to build a GPIO card 415 from a BT8xx TV card, see the documentation file at 416 Documentation/bt8xxgpio.txt 417 418 If unsure, say N. 419 420config GPIO_LANGWELL 421 bool "Intel Langwell/Penwell GPIO support" 422 depends on PCI && X86 423 help 424 Say Y here to support Intel Langwell/Penwell GPIO. 425 426config GPIO_PCH 427 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 428 depends on PCI && X86 429 select GENERIC_IRQ_CHIP 430 help 431 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 432 which is an IOH(Input/Output Hub) for x86 embedded processor. 433 This driver can access PCH GPIO device. 434 435 This driver also can be used for LAPIS Semiconductor IOH(Input/ 436 Output Hub), ML7223 and ML7831. 437 ML7223 IOH is for MP(Media Phone) use. 438 ML7831 IOH is for general purpose use. 439 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 440 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 441 442config GPIO_ML_IOH 443 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 444 depends on PCI 445 select GENERIC_IRQ_CHIP 446 help 447 ML7213 is companion chip for Intel Atom E6xx series. 448 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 449 Hub) which is for IVI(In-Vehicle Infotainment) use. 450 This driver can access the IOH's GPIO device. 451 452config GPIO_SODAVILLE 453 bool "Intel Sodaville GPIO support" 454 depends on X86 && PCI && OF 455 select GPIO_GENERIC 456 select GENERIC_IRQ_CHIP 457 help 458 Say Y here to support Intel Sodaville GPIO. 459 460config GPIO_TIMBERDALE 461 bool "Support for timberdale GPIO IP" 462 depends on MFD_TIMBERDALE && HAS_IOMEM 463 ---help--- 464 Add support for the GPIO IP in the timberdale FPGA. 465 466config GPIO_RDC321X 467 tristate "RDC R-321x GPIO support" 468 depends on PCI 469 select MFD_CORE 470 select MFD_RDC321X 471 help 472 Support for the RDC R321x SoC GPIOs over southbridge 473 PCI configuration space. 474 475comment "SPI GPIO expanders:" 476 477config GPIO_MAX7301 478 tristate "Maxim MAX7301 GPIO expander" 479 depends on SPI_MASTER 480 select GPIO_MAX730X 481 help 482 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 483 484config GPIO_MCP23S08 485 tristate "Microchip MCP23xxx I/O expander" 486 depends on SPI_MASTER || I2C 487 help 488 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 489 I/O expanders. 490 This provides a GPIO interface supporting inputs and outputs. 491 492config GPIO_MC33880 493 tristate "Freescale MC33880 high-side/low-side switch" 494 depends on SPI_MASTER 495 help 496 SPI driver for Freescale MC33880 high-side/low-side switch. 497 This provides GPIO interface supporting inputs and outputs. 498 499config GPIO_74X164 500 tristate "74x164 serial-in/parallel-out 8-bits shift register" 501 depends on SPI_MASTER 502 help 503 Platform driver for 74x164 compatible serial-in/parallel-out 504 8-outputs shift registers. This driver can be used to provide access 505 to more gpio outputs. 506 507comment "AC97 GPIO expanders:" 508 509config GPIO_UCB1400 510 bool "Philips UCB1400 GPIO" 511 depends on UCB1400_CORE 512 help 513 This enables support for the Philips UCB1400 GPIO pins. 514 The UCB1400 is an AC97 audio codec. 515 516comment "MODULbus GPIO expanders:" 517 518config GPIO_JANZ_TTL 519 tristate "Janz VMOD-TTL Digital IO Module" 520 depends on MFD_JANZ_CMODIO 521 help 522 This enables support for the Janz VMOD-TTL Digital IO module. 523 This driver provides support for driving the pins in output 524 mode only. Input mode is not supported. 525 526config GPIO_AB8500 527 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 528 depends on AB8500_CORE && BROKEN 529 help 530 Select this to enable the AB8500 IC GPIO driver 531 532config GPIO_TPS65910 533 bool "TPS65910 GPIO" 534 depends on MFD_TPS65910 535 help 536 Select this option to enable GPIO driver for the TPS65910 537 chip family. 538endif 539