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_MM_LANTIQ 118 bool "Lantiq Memory mapped GPIOs" 119 depends on LANTIQ && SOC_XWAY 120 help 121 This enables support for memory mapped GPIOs on the External Bus Unit 122 (EBU) found on Lantiq SoCs. The gpios are output only as they are 123 created by attaching a 16bit latch to the bus. 124 125config GPIO_MPC5200 126 def_bool y 127 depends on PPC_MPC52xx 128 129config GPIO_MPC8XXX 130 bool "MPC512x/MPC8xxx GPIO support" 131 depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \ 132 FSL_SOC_BOOKE || PPC_86xx 133 help 134 Say Y here if you're going to use hardware that connects to the 135 MPC512x/831x/834x/837x/8572/8610 GPIOs. 136 137config GPIO_MSM_V1 138 tristate "Qualcomm MSM GPIO v1" 139 depends on GPIOLIB && ARCH_MSM 140 help 141 Say yes here to support the GPIO interface on ARM v6 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_MSM_V2 146 tristate "Qualcomm MSM GPIO v2" 147 depends on GPIOLIB && ARCH_MSM 148 help 149 Say yes here to support the GPIO interface on ARM v7 based 150 Qualcomm MSM chips. Most of the pins on the MSM can be 151 selected for GPIO, and are controlled by this driver. 152 153config GPIO_MXC 154 def_bool y 155 depends on ARCH_MXC 156 select GPIO_GENERIC 157 select GENERIC_IRQ_CHIP 158 159config GPIO_MXS 160 def_bool y 161 depends on ARCH_MXS 162 select GPIO_GENERIC 163 select GENERIC_IRQ_CHIP 164 165config GPIO_PL061 166 bool "PrimeCell PL061 GPIO support" 167 depends on ARM_AMBA 168 select GENERIC_IRQ_CHIP 169 help 170 Say yes here to support the PrimeCell PL061 GPIO device 171 172config GPIO_PXA 173 bool "PXA GPIO support" 174 depends on ARCH_PXA || ARCH_MMP 175 help 176 Say yes here to support the PXA GPIO device 177 178config GPIO_STA2X11 179 bool "STA2x11/ConneXt GPIO support" 180 depends on MFD_STA2X11 181 select GENERIC_IRQ_CHIP 182 help 183 Say yes here to support the STA2x11/ConneXt GPIO device. 184 The GPIO module has 128 GPIO pins with alternate functions. 185 186config GPIO_XILINX 187 bool "Xilinx GPIO support" 188 depends on PPC_OF || MICROBLAZE 189 help 190 Say yes here to support the Xilinx FPGA GPIO device 191 192config GPIO_VR41XX 193 tristate "NEC VR4100 series General-purpose I/O Uint support" 194 depends on CPU_VR41XX 195 help 196 Say yes here to support the NEC VR4100 series General-purpose I/O Uint 197 198config GPIO_SCH 199 tristate "Intel SCH/TunnelCreek/Centerton GPIO" 200 depends on PCI && X86 201 select MFD_CORE 202 select LPC_SCH 203 help 204 Say yes here to support GPIO interface on Intel Poulsbo SCH, 205 Intel Tunnel Creek processor or Intel Centerton processor. 206 The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are 207 powered by the core power rail and are turned off during sleep 208 modes (S3 and higher). The remaining four GPIOs are powered by 209 the Intel SCH suspend power supply. These GPIOs remain 210 active during S3. The suspend powered GPIOs can be used to wake the 211 system from the Suspend-to-RAM state. 212 The Intel Tunnel Creek processor has 5 GPIOs powered by the 213 core power rail and 9 from suspend power supply. 214 The Intel Centerton processor has a total of 30 GPIO pins. 215 Twenty-one are powered by the core power rail and 9 from the 216 suspend power supply. 217 218config GPIO_ICH 219 tristate "Intel ICH GPIO" 220 depends on PCI && X86 221 select MFD_CORE 222 select LPC_ICH 223 help 224 Say yes here to support the GPIO functionality of a number of Intel 225 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8 226 ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg 227 Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake). 228 229 If unsure, say N. 230 231config GPIO_VX855 232 tristate "VIA VX855/VX875 GPIO" 233 depends on PCI 234 select MFD_CORE 235 select MFD_VX855 236 help 237 Support access to the VX855/VX875 GPIO lines through the gpio library. 238 239 This driver provides common support for accessing the device, 240 additional drivers must be enabled in order to use the 241 functionality of the device. 242 243config GPIO_GE_FPGA 244 bool "GE FPGA based GPIO" 245 depends on GE_FPGA 246 help 247 Support for common GPIO functionality provided on some GE Single Board 248 Computers. 249 250 This driver provides basic support (configure as input or output, read 251 and write pin state) for GPIO implemented in a number of GE single 252 board computers. 253 254comment "I2C GPIO expanders:" 255 256config GPIO_MAX7300 257 tristate "Maxim MAX7300 GPIO expander" 258 depends on I2C 259 select GPIO_MAX730X 260 help 261 GPIO driver for Maxim MAX7301 I2C-based GPIO expander. 262 263config GPIO_MAX732X 264 tristate "MAX7319, MAX7320-7327 I2C Port Expanders" 265 depends on I2C 266 help 267 Say yes here to support the MAX7319, MAX7320-7327 series of I2C 268 Port Expanders. Each IO port on these chips has a fixed role of 269 Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain 270 Input and Output (designed by 'P'). The combinations are listed 271 below: 272 273 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), 274 max7322 (4I4O), max7323 (4P4O) 275 276 16 bits: max7324 (8I8O), max7325 (8P8O), 277 max7326 (4I12O), max7327 (4P12O) 278 279 Board setup code must specify the model to use, and the start 280 number for these GPIOs. 281 282config GPIO_MAX732X_IRQ 283 bool "Interrupt controller support for MAX732x" 284 depends on GPIO_MAX732X=y && GENERIC_HARDIRQS 285 help 286 Say yes here to enable the max732x to be used as an interrupt 287 controller. It requires the driver to be built in the kernel. 288 289config GPIO_MC9S08DZ60 290 bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions" 291 depends on I2C && MACH_MX35_3DS 292 help 293 Select this to enable the MC9S08DZ60 GPIO driver 294 295config GPIO_PCA953X 296 tristate "PCA953x, PCA955x, PCA957x, TCA64xx, and MAX7310 I/O ports" 297 depends on I2C 298 help 299 Say yes here to provide access to several register-oriented 300 SMBus I/O expanders, made mostly by NXP or TI. Compatible 301 models include: 302 303 4 bits: pca9536, pca9537 304 305 8 bits: max7310, max7315, pca6107, pca9534, pca9538, pca9554, 306 pca9556, pca9557, pca9574, tca6408 307 308 16 bits: max7312, max7313, pca9535, pca9539, pca9555, pca9575, 309 tca6416 310 311config GPIO_PCA953X_IRQ 312 bool "Interrupt controller support for PCA953x" 313 depends on GPIO_PCA953X=y 314 help 315 Say yes here to enable the pca953x to be used as an interrupt 316 controller. It requires the driver to be built in the kernel. 317 318config GPIO_PCF857X 319 tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" 320 depends on I2C 321 help 322 Say yes here to provide access to most "quasi-bidirectional" I2C 323 GPIO expanders used for additional digital outputs or inputs. 324 Most of these parts are from NXP, though TI is a second source for 325 some of them. Compatible models include: 326 327 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, 328 pca9670, pca9672, pca9674, pca9674a, 329 max7328, max7329 330 331 16 bits: pcf8575, pcf8575c, pca8575, 332 pca9671, pca9673, pca9675 333 334 Your board setup code will need to declare the expanders in 335 use, and assign numbers to the GPIOs they expose. Those GPIOs 336 can then be used from drivers and other kernel code, just like 337 other GPIOs, but only accessible from task contexts. 338 339 This driver provides an in-kernel interface to those GPIOs using 340 platform-neutral GPIO calls. 341 342config GPIO_RC5T583 343 bool "RICOH RC5T583 GPIO" 344 depends on MFD_RC5T583 345 help 346 Select this option to enable GPIO driver for the Ricoh RC5T583 347 chip family. 348 This driver provides the support for driving/reading the gpio pins 349 of RC5T583 device through standard gpio library. 350 351config GPIO_SX150X 352 bool "Semtech SX150x I2C GPIO expander" 353 depends on I2C=y 354 default n 355 help 356 Say yes here to provide support for Semtech SX150-series I2C 357 GPIO expanders. Compatible models include: 358 359 8 bits: sx1508q 360 16 bits: sx1509q 361 362config GPIO_STMPE 363 bool "STMPE GPIOs" 364 depends on MFD_STMPE 365 help 366 This enables support for the GPIOs found on the STMPE I/O 367 Expanders. 368 369config GPIO_STP_XWAY 370 bool "XWAY STP GPIOs" 371 depends on SOC_XWAY 372 help 373 This enables support for the Serial To Parallel (STP) unit found on 374 XWAY SoC. The STP allows the SoC to drive a shift registers cascade, 375 that can be up to 24 bit. This peripheral is aimed at driving leds. 376 Some of the gpios/leds can be auto updated by the soc with dsl and 377 phy status. 378 379config GPIO_TC3589X 380 bool "TC3589X GPIOs" 381 depends on MFD_TC3589X 382 help 383 This enables support for the GPIOs found on the TC3589X 384 I/O Expander. 385 386config GPIO_TPS65912 387 tristate "TI TPS65912 GPIO" 388 depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI) 389 help 390 This driver supports TPS65912 gpio chip 391 392config GPIO_TWL4030 393 tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" 394 depends on TWL4030_CORE 395 help 396 Say yes here to access the GPIO signals of various multi-function 397 power management chips from Texas Instruments. 398 399config GPIO_WM831X 400 tristate "WM831x GPIOs" 401 depends on MFD_WM831X 402 help 403 Say yes here to access the GPIO signals of WM831x power management 404 chips from Wolfson Microelectronics. 405 406config GPIO_WM8350 407 tristate "WM8350 GPIOs" 408 depends on MFD_WM8350 409 help 410 Say yes here to access the GPIO signals of WM8350 power management 411 chips from Wolfson Microelectronics. 412 413config GPIO_WM8994 414 tristate "WM8994 GPIOs" 415 depends on MFD_WM8994 416 help 417 Say yes here to access the GPIO signals of WM8994 audio hub 418 CODECs from Wolfson Microelectronics. 419 420config GPIO_ADP5520 421 tristate "GPIO Support for ADP5520 PMIC" 422 depends on PMIC_ADP5520 423 help 424 This option enables support for on-chip GPIO found 425 on Analog Devices ADP5520 PMICs. 426 427config GPIO_ADP5588 428 tristate "ADP5588 I2C GPIO expander" 429 depends on I2C 430 help 431 This option enables support for 18 GPIOs found 432 on Analog Devices ADP5588 GPIO Expanders. 433 434config GPIO_ADP5588_IRQ 435 bool "Interrupt controller support for ADP5588" 436 depends on GPIO_ADP5588=y 437 help 438 Say yes here to enable the adp5588 to be used as an interrupt 439 controller. It requires the driver to be built in the kernel. 440 441comment "PCI GPIO expanders:" 442 443config GPIO_CS5535 444 tristate "AMD CS5535/CS5536 GPIO support" 445 depends on PCI && X86 && MFD_CS5535 446 help 447 The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that 448 can be used for quite a number of things. The CS5535/6 is found on 449 AMD Geode and Lemote Yeeloong devices. 450 451 If unsure, say N. 452 453config GPIO_BT8XX 454 tristate "BT8XX GPIO abuser" 455 depends on PCI && VIDEO_BT848=n 456 help 457 The BT8xx frame grabber chip has 24 GPIO pins than can be abused 458 as a cheap PCI GPIO card. 459 460 This chip can be found on Miro, Hauppauge and STB TV-cards. 461 462 The card needs to be physically altered for using it as a 463 GPIO card. For more information on how to build a GPIO card 464 from a BT8xx TV card, see the documentation file at 465 Documentation/bt8xxgpio.txt 466 467 If unsure, say N. 468 469config GPIO_LANGWELL 470 bool "Intel Langwell/Penwell GPIO support" 471 depends on PCI && X86 472 select IRQ_DOMAIN 473 help 474 Say Y here to support Intel Langwell/Penwell GPIO. 475 476config GPIO_PCH 477 tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" 478 depends on PCI && X86 479 select GENERIC_IRQ_CHIP 480 help 481 This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff 482 which is an IOH(Input/Output Hub) for x86 embedded processor. 483 This driver can access PCH GPIO device. 484 485 This driver also can be used for LAPIS Semiconductor IOH(Input/ 486 Output Hub), ML7223 and ML7831. 487 ML7223 IOH is for MP(Media Phone) use. 488 ML7831 IOH is for general purpose use. 489 ML7223/ML7831 is companion chip for Intel Atom E6xx series. 490 ML7223/ML7831 is completely compatible for Intel EG20T PCH. 491 492config GPIO_ML_IOH 493 tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support" 494 depends on PCI 495 select GENERIC_IRQ_CHIP 496 help 497 ML7213 is companion chip for Intel Atom E6xx series. 498 This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output 499 Hub) which is for IVI(In-Vehicle Infotainment) use. 500 This driver can access the IOH's GPIO device. 501 502config GPIO_SODAVILLE 503 bool "Intel Sodaville GPIO support" 504 depends on X86 && PCI && OF 505 select GPIO_GENERIC 506 select GENERIC_IRQ_CHIP 507 help 508 Say Y here to support Intel Sodaville GPIO. 509 510config GPIO_TIMBERDALE 511 bool "Support for timberdale GPIO IP" 512 depends on MFD_TIMBERDALE && HAS_IOMEM 513 ---help--- 514 Add support for the GPIO IP in the timberdale FPGA. 515 516config GPIO_RDC321X 517 tristate "RDC R-321x GPIO support" 518 depends on PCI 519 select MFD_CORE 520 select MFD_RDC321X 521 help 522 Support for the RDC R321x SoC GPIOs over southbridge 523 PCI configuration space. 524 525comment "SPI GPIO expanders:" 526 527config GPIO_MAX7301 528 tristate "Maxim MAX7301 GPIO expander" 529 depends on SPI_MASTER 530 select GPIO_MAX730X 531 help 532 GPIO driver for Maxim MAX7301 SPI-based GPIO expander. 533 534config GPIO_MCP23S08 535 tristate "Microchip MCP23xxx I/O expander" 536 depends on SPI_MASTER || I2C 537 help 538 SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 539 I/O expanders. 540 This provides a GPIO interface supporting inputs and outputs. 541 542config GPIO_MC33880 543 tristate "Freescale MC33880 high-side/low-side switch" 544 depends on SPI_MASTER 545 help 546 SPI driver for Freescale MC33880 high-side/low-side switch. 547 This provides GPIO interface supporting inputs and outputs. 548 549config GPIO_74X164 550 tristate "74x164 serial-in/parallel-out 8-bits shift register" 551 depends on SPI_MASTER 552 help 553 Platform driver for 74x164 compatible serial-in/parallel-out 554 8-outputs shift registers. This driver can be used to provide access 555 to more gpio outputs. 556 557comment "AC97 GPIO expanders:" 558 559config GPIO_UCB1400 560 bool "Philips UCB1400 GPIO" 561 depends on UCB1400_CORE 562 help 563 This enables support for the Philips UCB1400 GPIO pins. 564 The UCB1400 is an AC97 audio codec. 565 566comment "MODULbus GPIO expanders:" 567 568config GPIO_JANZ_TTL 569 tristate "Janz VMOD-TTL Digital IO Module" 570 depends on MFD_JANZ_CMODIO 571 help 572 This enables support for the Janz VMOD-TTL Digital IO module. 573 This driver provides support for driving the pins in output 574 mode only. Input mode is not supported. 575 576config GPIO_AB8500 577 bool "ST-Ericsson AB8500 Mixed Signal Circuit gpio functions" 578 depends on AB8500_CORE && BROKEN 579 help 580 Select this to enable the AB8500 IC GPIO driver 581 582config GPIO_TPS65910 583 bool "TPS65910 GPIO" 584 depends on MFD_TPS65910 585 help 586 Select this option to enable GPIO driver for the TPS65910 587 chip family. 588 589config GPIO_MSIC 590 bool "Intel MSIC mixed signal gpio support" 591 depends on MFD_INTEL_MSIC 592 help 593 Enable support for GPIO on intel MSIC controllers found in 594 intel MID devices 595 596endif 597