1# 2# GPIO infrastructure and drivers 3# 4 5config ARCH_HAVE_CUSTOM_GPIO_H 6 bool 7 help 8 Selecting this config option from the architecture Kconfig allows 9 the architecture to provide a custom asm/gpio.h implementation 10 overriding the default implementations. New uses of this are 11 strongly discouraged. 12 13config ARCH_WANT_OPTIONAL_GPIOLIB 14 bool 15 help 16 Select this config option from the architecture Kconfig, if 17 it is possible to use gpiolib on the architecture, but let the 18 user decide whether to actually build it or not. 19 Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does 20 not depend on GPIOs being available, but rather let the user 21 decide whether he needs it or not. 22 23config ARCH_REQUIRE_GPIOLIB 24 bool 25 select GPIOLIB 26 help 27 Platforms select gpiolib if they use this infrastructure 28 for all their GPIOs, usually starting with ones integrated 29 into SOC processors. 30 Selecting this from the architecture code will cause the gpiolib 31 code to always get built in. 32 33 34 35menuconfig GPIOLIB 36 bool "GPIO Support" 37 depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB 38 select GENERIC_GPIO 39 help 40 This enables GPIO support through the generic GPIO library. 41 You only need to enable this, if you also want to enable 42 one or more of the GPIO drivers below. 43 44 If unsure, say N. 45 46if GPIOLIB 47 48config OF_GPIO 49 def_bool y 50 depends on OF && !SPARC 51 52config DEBUG_GPIO 53 bool "Debug GPIO calls" 54 depends on DEBUG_KERNEL 55 help 56 Say Y here to add some extra checks and diagnostics to GPIO calls. 57 These checks help ensure that GPIOs have been properly initialized 58 before they are used, and that sleeping calls are not made from 59 non-sleeping contexts. They can make bitbanged serial protocols 60 slower. The diagnostics help catch the type of setup errors 61 that are most common when setting up new platforms or boards. 62 63config GPIO_SYSFS 64 bool "/sys/class/gpio/... (sysfs interface)" 65 depends on SYSFS && EXPERIMENTAL 66 help 67 Say Y here to add a sysfs interface for GPIOs. 68 69 This is mostly useful to work around omissions in a system's 70 kernel support. Those are common in custom and semicustom 71 hardware assembled using standard kernels with a minimum of 72 custom patches. In those cases, userspace code may import 73 a given GPIO from the kernel, if no kernel driver requested it. 74 75 Kernel drivers may also request that a particular GPIO be 76 exported to userspace; this can be useful when debugging. 77 78config GPIO_GENERIC 79 tristate 80 81# put drivers in the right section, in alphabetical order 82 83config GPIO_DA9052 84 tristate "Dialog DA9052 GPIO" 85 depends on PMIC_DA9052 && BROKEN 86 help 87 Say yes here to enable the GPIO driver for the DA9052 chip. 88 89config GPIO_MAX730X 90 tristate 91 92comment "Memory mapped GPIO drivers:" 93 94config GPIO_GENERIC_PLATFORM 95 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)" 96 select GPIO_GENERIC 97 help 98 Say yes here to support basic platform_device memory-mapped GPIO controllers. 99 100config GPIO_IT8761E 101 tristate "IT8761E GPIO support" 102 depends on X86 # unconditional access to IO space. 103 help 104 Say yes here to support GPIO functionality of IT8761E super I/O chip. 105 106config GPIO_EM 107 tristate "Emma Mobile GPIO" 108 depends on ARM 109 help 110 Say yes here to support GPIO on Renesas Emma Mobile SoCs. 111 112config GPIO_EP93XX 113 def_bool y 114 depends on ARCH_EP93XX 115 select GPIO_GENERIC 116 117config GPIO_MPC5200 118 def_bool y 119 depends on PPC_MPC52xx 120 121config GPIO_MPC8XXX 122 bool "MPC512x/MPC8xxx GPIO support" 123 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 124 FSL_SOC_BOOKE || PPC_86xx 125 help 126 Say Y here if you're going to use hardware that connects to the 127 MPC512x/831x/834x/837x/8572/8610 GPIOs. 128 129config GPIO_MSM_V1 130 tristate "Qualcomm MSM GPIO v1" 131 depends on GPIOLIB && ARCH_MSM 132 help 133 Say yes here to support the GPIO interface on ARM v6 based 134 Qualcomm MSM chips. Most of the pins on the MSM can be 135 selected for GPIO, and are controlled by this driver. 136 137config GPIO_MSM_V2 138 tristate "Qualcomm MSM GPIO v2" 139 depends on GPIOLIB && ARCH_MSM 140 help 141 Say yes here to support the GPIO interface on ARM v7 based 142 Qualcomm MSM chips. Most of the pins on the MSM can be 143 selected for GPIO, and are controlled by this driver. 144 145config GPIO_MXC 146 def_bool y 147 depends on ARCH_MXC 148 select GPIO_GENERIC 149 select GENERIC_IRQ_CHIP 150 151config GPIO_MXS 152 def_bool y 153 depends on ARCH_MXS 154 select GPIO_GENERIC 155 select GENERIC_IRQ_CHIP 156 157config GPIO_PL061 158 bool "PrimeCell PL061 GPIO support" 159 depends on ARM_AMBA 160 select GENERIC_IRQ_CHIP 161 help 162 Say yes here to support the PrimeCell PL061 GPIO device 163 164config GPIO_PXA 165 bool "PXA GPIO support" 166 depends on ARCH_PXA || ARCH_MMP 167 help 168 Say yes here to support the PXA GPIO device 169 170config GPIO_STA2X11 171 bool "STA2x11/ConneXt GPIO support" 172 depends on MFD_STA2X11 173 select GENERIC_IRQ_CHIP 174 help 175 Say yes here to support the STA2x11/ConneXt GPIO device. 176 The GPIO module has 128 GPIO pins with alternate functions. 177 178config GPIO_XILINX 179 bool "Xilinx GPIO support" 180 depends on PPC_OF || MICROBLAZE 181 help 182 Say yes here to support the Xilinx FPGA GPIO device 183 184config GPIO_VR41XX 185 tristate "NEC VR4100 series General-purpose I/O Uint support" 186 depends on CPU_VR41XX 187 help 188 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 189 190config GPIO_SCH 191 tristate "Intel SCH/TunnelCreek/Centerton GPIO" 192 depends on PCI && X86 193 select MFD_CORE 194 select LPC_SCH 195 help 196 Say yes here to support GPIO interface on Intel Poulsbo SCH, 197 Intel Tunnel Creek processor or Intel Centerton processor. 198 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 199 powered by the core power rail and are turned off during sleep 200 modes (S3 and higher). The remaining four GPIOs are powered by 201 the Intel SCH suspend power supply. These GPIOs remain 202 active during S3. The suspend powered GPIOs can be used to wake the 203 system from the Suspend-to-RAM state. 204 The Intel Tunnel Creek processor has 5 GPIOs powered by the 205 core power rail and 9 from suspend power supply. 206 The Intel Centerton processor has a total of 30 GPIO pins. 207 Twenty-one are powered by the core power rail and 9 from the 208 suspend power supply. 209 210config GPIO_ICH 211 tristate "Intel ICH GPIO" 212 depends on PCI && X86 213 select MFD_CORE 214 select LPC_ICH 215 help 216 Say yes here to support the GPIO functionality of a number of Intel 217 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8 218 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg 219 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake). 220 221 If unsure, say N. 222 223config GPIO_VX855 224 tristate "VIA VX855/VX875 GPIO" 225 depends on PCI 226 select MFD_CORE 227 select MFD_VX855 228 help 229 Support access to the VX855/VX875 GPIO lines through the gpio library. 230 231 This driver provides common support for accessing the device, 232 additional drivers must be enabled in order to use the 233 functionality of the device. 234 235config GPIO_GE_FPGA 236 bool "GE FPGA based GPIO" 237 depends on GE_FPGA 238 help 239 Support for common GPIO functionality provided on some GE Single Board 240 Computers. 241 242 This driver provides basic support (configure as input or output, read 243 and write pin state) for GPIO implemented in a number of GE single 244 board computers. 245 246comment "I2C GPIO expanders:" 247 248config GPIO_MAX7300 249 tristate "Maxim MAX7300 GPIO expander" 250 depends on I2C 251 select GPIO_MAX730X 252 help 253 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 254 255config GPIO_MAX732X 256 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 257 depends on I2C 258 help 259 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 260 Port Expanders. Each IO port on these chips has a fixed role of 261 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 262 Input and Output (designed by 'P'). The combinations are listed 263 below: 264 265 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 266 max7322 (4I4O), max7323 (4P4O) 267 268 16 bits: max7324 (8I8O), max7325 (8P8O), 269 max7326 (4I12O), max7327 (4P12O) 270 271 Board setup code must specify the model to use, and the start 272 number for these GPIOs. 273 274config GPIO_MAX732X_IRQ 275 bool "Interrupt controller support for MAX732x" 276 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 277 help 278 Say yes here to enable the max732x to be used as an interrupt 279 controller. It requires the driver to be built in the kernel. 280 281config GPIO_MC9S08DZ60 282 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" 283 depends on I2C && MACH_MX35_3DS 284 help 285 Select this to enable the MC9S08DZ60 GPIO driver 286 287config GPIO_PCA953X 288 tristate "PCA953x, PCA955x, PCA957x, TCA64xx, and MAX7310 I/O ports" 289 depends on I2C 290 help 291 Say yes here to provide access to several register-oriented 292 SMBus I/O expanders, made mostly by NXP or TI. Compatible 293 models include: 294 295 4 bits: pca9536, pca9537 296 297 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554, 298 pca9556, pca9557, pca9574, tca6408 299 300 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575, 301 tca6416 302 303config GPIO_PCA953X_IRQ 304 bool "Interrupt controller support for PCA953x" 305 depends on GPIO_PCA953X=y 306 help 307 Say yes here to enable the pca953x to be used as an interrupt 308 controller. It requires the driver to be built in the kernel. 309 310config GPIO_PCF857X 311 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 312 depends on I2C 313 help 314 Say yes here to provide access to most "quasi-bidirectional" I2C 315 GPIO expanders used for additional digital outputs or inputs. 316 Most of these parts are from NXP, though TI is a second source for 317 some of them. Compatible models include: 318 319 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 320 pca9670, pca9672, pca9674, pca9674a, 321 max7328, max7329 322 323 16 bits: pcf8575, pcf8575c, pca8575, 324 pca9671, pca9673, pca9675 325 326 Your board setup code will need to declare the expanders in 327 use, and assign numbers to the GPIOs they expose. Those GPIOs 328 can then be used from drivers and other kernel code, just like 329 other GPIOs, but only accessible from task contexts. 330 331 This driver provides an in-kernel interface to those GPIOs using 332 platform-neutral GPIO calls. 333 334config GPIO_RC5T583 335 bool "RICOH RC5T583 GPIO" 336 depends on MFD_RC5T583 337 help 338 Select this option to enable GPIO driver for the Ricoh RC5T583 339 chip family. 340 This driver provides the support for driving/reading the gpio pins 341 of RC5T583 device through standard gpio library. 342 343config GPIO_SX150X 344 bool "Semtech SX150x I2C GPIO expander" 345 depends on I2C=y 346 default n 347 help 348 Say yes here to provide support for Semtech SX150-series I2C 349 GPIO expanders. Compatible models include: 350 351 8 bits: sx1508q 352 16 bits: sx1509q 353 354config GPIO_STMPE 355 bool "STMPE GPIOs" 356 depends on MFD_STMPE 357 help 358 This enables support for the GPIOs found on the STMPE I/O 359 Expanders. 360 361config GPIO_TC3589X 362 bool "TC3589X GPIOs" 363 depends on MFD_TC3589X 364 help 365 This enables support for the GPIOs found on the TC3589X 366 I/O Expander. 367 368config GPIO_TPS65912 369 tristate "TI TPS65912 GPIO" 370 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 371 help 372 This driver supports TPS65912 gpio chip 373 374config GPIO_TWL4030 375 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 376 depends on TWL4030_CORE 377 help 378 Say yes here to access the GPIO signals of various multi-function 379 power management chips from Texas Instruments. 380 381config GPIO_WM831X 382 tristate "WM831x GPIOs" 383 depends on MFD_WM831X 384 help 385 Say yes here to access the GPIO signals of WM831x power management 386 chips from Wolfson Microelectronics. 387 388config GPIO_WM8350 389 tristate "WM8350 GPIOs" 390 depends on MFD_WM8350 391 help 392 Say yes here to access the GPIO signals of WM8350 power management 393 chips from Wolfson Microelectronics. 394 395config GPIO_WM8994 396 tristate "WM8994 GPIOs" 397 depends on MFD_WM8994 398 help 399 Say yes here to access the GPIO signals of WM8994 audio hub 400 CODECs from Wolfson Microelectronics. 401 402config GPIO_ADP5520 403 tristate "GPIO Support for ADP5520 PMIC" 404 depends on PMIC_ADP5520 405 help 406 This option enables support for on-chip GPIO found 407 on Analog Devices ADP5520 PMICs. 408 409config GPIO_ADP5588 410 tristate "ADP5588 I2C GPIO expander" 411 depends on I2C 412 help 413 This option enables support for 18 GPIOs found 414 on Analog Devices ADP5588 GPIO Expanders. 415 416config GPIO_ADP5588_IRQ 417 bool "Interrupt controller support for ADP5588" 418 depends on GPIO_ADP5588=y 419 help 420 Say yes here to enable the adp5588 to be used as an interrupt 421 controller. It requires the driver to be built in the kernel. 422 423comment "PCI GPIO expanders:" 424 425config GPIO_CS5535 426 tristate "AMD CS5535/CS5536 GPIO support" 427 depends on PCI && X86 && MFD_CS5535 428 help 429 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 430 can be used for quite a number of things. The CS5535/6 is found on 431 AMD Geode and Lemote Yeeloong devices. 432 433 If unsure, say N. 434 435config GPIO_BT8XX 436 tristate "BT8XX GPIO abuser" 437 depends on PCI && VIDEO_BT848=n 438 help 439 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 440 as a cheap PCI GPIO card. 441 442 This chip can be found on Miro, Hauppauge and STB TV-cards. 443 444 The card needs to be physically altered for using it as a 445 GPIO card. For more information on how to build a GPIO card 446 from a BT8xx TV card, see the documentation file at 447 Documentation/bt8xxgpio.txt 448 449 If unsure, say N. 450 451config GPIO_LANGWELL 452 bool "Intel Langwell/Penwell GPIO support" 453 depends on PCI && X86 454 select IRQ_DOMAIN 455 help 456 Say Y here to support Intel Langwell/Penwell GPIO. 457 458config GPIO_PCH 459 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 460 depends on PCI && X86 461 select GENERIC_IRQ_CHIP 462 help 463 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 464 which is an IOH(Input/Output Hub) for x86 embedded processor. 465 This driver can access PCH GPIO device. 466 467 This driver also can be used for LAPIS Semiconductor IOH(Input/ 468 Output Hub), ML7223 and ML7831. 469 ML7223 IOH is for MP(Media Phone) use. 470 ML7831 IOH is for general purpose use. 471 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 472 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 473 474config GPIO_ML_IOH 475 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 476 depends on PCI 477 select GENERIC_IRQ_CHIP 478 help 479 ML7213 is companion chip for Intel Atom E6xx series. 480 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 481 Hub) which is for IVI(In-Vehicle Infotainment) use. 482 This driver can access the IOH's GPIO device. 483 484config GPIO_SODAVILLE 485 bool "Intel Sodaville GPIO support" 486 depends on X86 && PCI && OF 487 select GPIO_GENERIC 488 select GENERIC_IRQ_CHIP 489 help 490 Say Y here to support Intel Sodaville GPIO. 491 492config GPIO_TIMBERDALE 493 bool "Support for timberdale GPIO IP" 494 depends on MFD_TIMBERDALE && HAS_IOMEM 495 ---help--- 496 Add support for the GPIO IP in the timberdale FPGA. 497 498config GPIO_RDC321X 499 tristate "RDC R-321x GPIO support" 500 depends on PCI 501 select MFD_CORE 502 select MFD_RDC321X 503 help 504 Support for the RDC R321x SoC GPIOs over southbridge 505 PCI configuration space. 506 507comment "SPI GPIO expanders:" 508 509config GPIO_MAX7301 510 tristate "Maxim MAX7301 GPIO expander" 511 depends on SPI_MASTER 512 select GPIO_MAX730X 513 help 514 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 515 516config GPIO_MCP23S08 517 tristate "Microchip MCP23xxx I/O expander" 518 depends on SPI_MASTER || I2C 519 help 520 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 521 I/O expanders. 522 This provides a GPIO interface supporting inputs and outputs. 523 524config GPIO_MC33880 525 tristate "Freescale MC33880 high-side/low-side switch" 526 depends on SPI_MASTER 527 help 528 SPI driver for Freescale MC33880 high-side/low-side switch. 529 This provides GPIO interface supporting inputs and outputs. 530 531config GPIO_74X164 532 tristate "74x164 serial-in/parallel-out 8-bits shift register" 533 depends on SPI_MASTER 534 help 535 Platform driver for 74x164 compatible serial-in/parallel-out 536 8-outputs shift registers. This driver can be used to provide access 537 to more gpio outputs. 538 539comment "AC97 GPIO expanders:" 540 541config GPIO_UCB1400 542 bool "Philips UCB1400 GPIO" 543 depends on UCB1400_CORE 544 help 545 This enables support for the Philips UCB1400 GPIO pins. 546 The UCB1400 is an AC97 audio codec. 547 548comment "MODULbus GPIO expanders:" 549 550config GPIO_JANZ_TTL 551 tristate "Janz VMOD-TTL Digital IO Module" 552 depends on MFD_JANZ_CMODIO 553 help 554 This enables support for the Janz VMOD-TTL Digital IO module. 555 This driver provides support for driving the pins in output 556 mode only. Input mode is not supported. 557 558config GPIO_AB8500 559 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 560 depends on AB8500_CORE && BROKEN 561 help 562 Select this to enable the AB8500 IC GPIO driver 563 564config GPIO_TPS65910 565 bool "TPS65910 GPIO" 566 depends on MFD_TPS65910 567 help 568 Select this option to enable GPIO driver for the TPS65910 569 chip family. 570 571config GPIO_MSIC 572 bool "Intel MSIC mixed signal gpio support" 573 depends on MFD_INTEL_MSIC 574 help 575 Enable support for GPIO on intel MSIC controllers found in 576 intel MID devices 577 578endif 579