X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fgpio%2FKconfig;h=edb02530e461af4f91e442cdd581f91aa934c588;hb=8340437210390676f687633a80e3748c40885dc8;hp=bbd28342e771f415a4b7365653e3383757a398a2;hpb=f3dc3630f687aa4664b663143f69d99d83195c54;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index bbd2834..edb0253 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -2,44 +2,118 @@ # GPIO infrastructure and expanders # -config HAVE_GPIO_LIB +config ARCH_WANT_OPTIONAL_GPIOLIB bool help + Select this config option from the architecture Kconfig, if + it is possible to use gpiolib on the architecture, but let the + user decide whether to actually build it or not. + Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does + not depend on GPIOs being available, but rather let the user + decide whether he needs it or not. + +config ARCH_REQUIRE_GPIOLIB + bool + select GPIOLIB + help Platforms select gpiolib if they use this infrastructure for all their GPIOs, usually starting with ones integrated into SOC processors. + Selecting this from the architecture code will cause the gpiolib + code to always get built in. -menu "GPIO Support" - depends on HAVE_GPIO_LIB + + +menuconfig GPIOLIB + bool "GPIO Support" + depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB + select GENERIC_GPIO + help + This enables GPIO support through the generic GPIO library. + You only need to enable this, if you also want to enable + one or more of the GPIO expansion card drivers below. + + If unsure, say N. + +if GPIOLIB config DEBUG_GPIO bool "Debug GPIO calls" depends on DEBUG_KERNEL help Say Y here to add some extra checks and diagnostics to GPIO calls. - The checks help ensure that GPIOs have been properly initialized - before they are used and that sleeping calls aren not made from - nonsleeping contexts. They can make bitbanged serial protocols + These checks help ensure that GPIOs have been properly initialized + before they are used, and that sleeping calls are not made from + non-sleeping contexts. They can make bitbanged serial protocols slower. The diagnostics help catch the type of setup errors that are most common when setting up new platforms or boards. +config GPIO_SYSFS + bool "/sys/class/gpio/... (sysfs interface)" + depends on SYSFS && EXPERIMENTAL + help + Say Y here to add a sysfs interface for GPIOs. + + This is mostly useful to work around omissions in a system's + kernel support. Those are common in custom and semicustom + hardware assembled using standard kernels with a minimum of + custom patches. In those cases, userspace code may import + a given GPIO from the kernel, if no kernel driver requested it. + + Kernel drivers may also request that a particular GPIO be + exported to userspace; this can be useful when debugging. + # put expanders in the right section, in alphabetical order +comment "Memory mapped GPIO expanders:" + +config GPIO_XILINX + bool "Xilinx GPIO support" + depends on PPC_OF + help + Say yes here to support the Xilinx FPGA GPIO device + comment "I2C GPIO expanders:" +config GPIO_MAX732X + tristate "MAX7319, MAX7320-7327 I2C Port Expanders" + depends on I2C + help + Say yes here to support the MAX7319, MAX7320-7327 series of I2C + Port Expanders. Each IO port on these chips has a fixed role of + Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain + Input and Output (designed by 'P'). The combinations are listed + below: + + 8 bits: max7319 (8I), max7320 (8O), max7321 (8P), + max7322 (4I4O), max7323 (4P4O) + + 16 bits: max7324 (8I8O), max7325 (8P8O), + max7326 (4I12O), max7327 (4P12O) + + Board setup code must specify the model to use, and the start + number for these GPIOs. + config GPIO_PCA953X - tristate "PCA953x I/O ports" + tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports" depends on I2C help - Say yes here to support the PCA9534 (8-bit), PCA9535 (16-bit), - PCA9536 (4-bit), PCA9537 (4-bit), PCA9538 (8-bit), and PCA9539 - (16-bit) I/O ports. These parts are made by NXP and TI. + Say yes here to provide access to several register-oriented + SMBus I/O expanders, made mostly by NXP or TI. Compatible + models include: + + 4 bits: pca9536, pca9537 + + 8 bits: max7310, pca9534, pca9538, pca9554, pca9557, + tca6408 + + 16 bits: pca9535, pca9539, pca9555, tca6416 This driver can also be built as a module. If so, the module will be called pca953x. config GPIO_PCF857X - tristate "PCF857x, PCA857x, and PCA967x I2C GPIO expanders" + tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" depends on I2C help Say yes here to provide access to most "quasi-bidirectional" I2C @@ -48,7 +122,8 @@ config GPIO_PCF857X some of them. Compatible models include: 8 bits: pcf8574, pcf8574a, pca8574, pca8574a, - pca9670, pca9672, pca9674, pca9674a + pca9670, pca9672, pca9674, pca9674a, + max7328, max7329 16 bits: pcf8575, pcf8575c, pca8575, pca9671, pca9673, pca9675 @@ -61,8 +136,39 @@ config GPIO_PCF857X This driver provides an in-kernel interface to those GPIOs using platform-neutral GPIO calls. +config GPIO_TWL4030 + tristate "TWL4030, TWL5030, and TPS659x0 GPIOs" + depends on TWL4030_CORE + help + Say yes here to access the GPIO signals of various multi-function + power management chips from Texas Instruments. + +comment "PCI GPIO expanders:" + +config GPIO_BT8XX + tristate "BT8XX GPIO abuser" + depends on PCI && VIDEO_BT848=n + help + The BT8xx frame grabber chip has 24 GPIO pins than can be abused + as a cheap PCI GPIO card. + + This chip can be found on Miro, Hauppauge and STB TV-cards. + + The card needs to be physically altered for using it as a + GPIO card. For more information on how to build a GPIO card + from a BT8xx TV card, see the documentation file at + Documentation/bt8xxgpio.txt + + If unsure, say N. + comment "SPI GPIO expanders:" +config GPIO_MAX7301 + tristate "Maxim MAX7301 GPIO expander" + depends on SPI_MASTER + help + gpio driver for Maxim MAX7301 SPI GPIO expander. + config GPIO_MCP23S08 tristate "Microchip MCP23S08 I/O expander" depends on SPI_MASTER @@ -70,4 +176,4 @@ config GPIO_MCP23S08 SPI driver for Microchip MCP23S08 I/O expander. This provides a GPIO interface supporting inputs and outputs. -endmenu +endif