f04ddfcd24
Almost the same driver for both Poulsbo and Tunnel Creek. The difference is in quantity of GPIOs powered by the core power rail and by suspend power supply, default values for some GPIOs, etc. Detect actual hardware by platform device ID assigned in lpc_sch and set configuration accordingly. Signed-off-by: Denis Turischev <denis@compulab.co.il> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
418 lines
12 KiB
Plaintext
418 lines
12 KiB
Plaintext
#
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# platform-neutral GPIO infrastructure and expanders
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#
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config ARCH_WANT_OPTIONAL_GPIOLIB
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bool
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help
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Select this config option from the architecture Kconfig, if
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it is possible to use gpiolib on the architecture, but let the
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user decide whether to actually build it or not.
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Select this instead of ARCH_REQUIRE_GPIOLIB, if your architecture does
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not depend on GPIOs being available, but rather let the user
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decide whether he needs it or not.
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config ARCH_REQUIRE_GPIOLIB
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bool
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select GPIOLIB
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help
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Platforms select gpiolib if they use this infrastructure
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for all their GPIOs, usually starting with ones integrated
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into SOC processors.
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Selecting this from the architecture code will cause the gpiolib
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code to always get built in.
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menuconfig GPIOLIB
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bool "GPIO Support"
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depends on ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB
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select GENERIC_GPIO
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help
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This enables GPIO support through the generic GPIO library.
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You only need to enable this, if you also want to enable
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one or more of the GPIO expansion card drivers below.
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If unsure, say N.
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if GPIOLIB
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config DEBUG_GPIO
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bool "Debug GPIO calls"
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depends on DEBUG_KERNEL
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help
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Say Y here to add some extra checks and diagnostics to GPIO calls.
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These checks help ensure that GPIOs have been properly initialized
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before they are used, and that sleeping calls are not made from
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non-sleeping contexts. They can make bitbanged serial protocols
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slower. The diagnostics help catch the type of setup errors
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that are most common when setting up new platforms or boards.
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config GPIO_SYSFS
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bool "/sys/class/gpio/... (sysfs interface)"
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depends on SYSFS && EXPERIMENTAL
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help
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Say Y here to add a sysfs interface for GPIOs.
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This is mostly useful to work around omissions in a system's
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kernel support. Those are common in custom and semicustom
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hardware assembled using standard kernels with a minimum of
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custom patches. In those cases, userspace code may import
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a given GPIO from the kernel, if no kernel driver requested it.
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Kernel drivers may also request that a particular GPIO be
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exported to userspace; this can be useful when debugging.
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# put expanders in the right section, in alphabetical order
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config GPIO_MAX730X
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tristate
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comment "Memory mapped GPIO expanders:"
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config GPIO_BASIC_MMIO
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tristate "Basic memory-mapped GPIO controllers support"
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help
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Say yes here to support basic memory-mapped GPIO controllers.
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config GPIO_IT8761E
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tristate "IT8761E GPIO support"
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depends on GPIOLIB
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help
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Say yes here to support GPIO functionality of IT8761E super I/O chip.
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config GPIO_PL061
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bool "PrimeCell PL061 GPIO support"
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depends on ARM_AMBA
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help
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Say yes here to support the PrimeCell PL061 GPIO device
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config GPIO_XILINX
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bool "Xilinx GPIO support"
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depends on PPC_OF || MICROBLAZE
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help
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Say yes here to support the Xilinx FPGA GPIO device
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config GPIO_VR41XX
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tristate "NEC VR4100 series General-purpose I/O Uint support"
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depends on CPU_VR41XX
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help
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Say yes here to support the NEC VR4100 series General-purpose I/O Uint
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config GPIO_SCH
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tristate "Intel SCH/TunnelCreek GPIO"
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depends on GPIOLIB && PCI && X86
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select MFD_CORE
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select LPC_SCH
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help
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Say yes here to support GPIO interface on Intel Poulsbo SCH
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or Intel Tunnel Creek processor.
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The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are
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powered by the core power rail and are turned off during sleep
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modes (S3 and higher). The remaining four GPIOs are powered by
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the Intel SCH suspend power supply. These GPIOs remain
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active during S3. The suspend powered GPIOs can be used to wake the
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system from the Suspend-to-RAM state.
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The Intel Tunnel Creek processor has 5 GPIOs powered by the
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core power rail and 9 from suspend power supply.
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This driver can also be built as a module. If so, the module
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will be called sch-gpio.
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config GPIO_VX855
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tristate "VIA VX855/VX875 GPIO"
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depends on GPIOLIB && MFD_SUPPORT && PCI
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select MFD_CORE
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select MFD_VX855
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help
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Support access to the VX855/VX875 GPIO lines through the gpio library.
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This driver provides common support for accessing the device,
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additional drivers must be enabled in order to use the
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functionality of the device.
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comment "I2C GPIO expanders:"
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config GPIO_MAX7300
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tristate "Maxim MAX7300 GPIO expander"
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depends on I2C
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select GPIO_MAX730X
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help
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GPIO driver for Maxim MAX7301 I2C-based GPIO expander.
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config GPIO_MAX732X
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tristate "MAX7319, MAX7320-7327 I2C Port Expanders"
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depends on I2C
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help
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Say yes here to support the MAX7319, MAX7320-7327 series of I2C
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Port Expanders. Each IO port on these chips has a fixed role of
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Input (designated by 'I'), Push-Pull Output ('O'), or Open-Drain
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Input and Output (designed by 'P'). The combinations are listed
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below:
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8 bits: max7319 (8I), max7320 (8O), max7321 (8P),
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max7322 (4I4O), max7323 (4P4O)
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16 bits: max7324 (8I8O), max7325 (8P8O),
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max7326 (4I12O), max7327 (4P12O)
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Board setup code must specify the model to use, and the start
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number for these GPIOs.
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config GPIO_MAX732X_IRQ
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bool "Interrupt controller support for MAX732x"
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depends on GPIO_MAX732X=y && GENERIC_HARDIRQS
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help
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Say yes here to enable the max732x to be used as an interrupt
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controller. It requires the driver to be built in the kernel.
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config GPIO_PCA953X
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tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
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depends on I2C
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help
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Say yes here to provide access to several register-oriented
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SMBus I/O expanders, made mostly by NXP or TI. Compatible
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models include:
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4 bits: pca9536, pca9537
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8 bits: max7310, pca9534, pca9538, pca9554, pca9557,
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tca6408
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16 bits: pca9535, pca9539, pca9555, tca6416
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This driver can also be built as a module. If so, the module
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will be called pca953x.
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config GPIO_PCA953X_IRQ
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bool "Interrupt controller support for PCA953x"
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depends on GPIO_PCA953X=y
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help
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Say yes here to enable the pca953x to be used as an interrupt
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controller. It requires the driver to be built in the kernel.
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config GPIO_PCF857X
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tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
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depends on I2C
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help
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Say yes here to provide access to most "quasi-bidirectional" I2C
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GPIO expanders used for additional digital outputs or inputs.
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Most of these parts are from NXP, though TI is a second source for
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some of them. Compatible models include:
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8 bits: pcf8574, pcf8574a, pca8574, pca8574a,
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pca9670, pca9672, pca9674, pca9674a,
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max7328, max7329
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16 bits: pcf8575, pcf8575c, pca8575,
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pca9671, pca9673, pca9675
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Your board setup code will need to declare the expanders in
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use, and assign numbers to the GPIOs they expose. Those GPIOs
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can then be used from drivers and other kernel code, just like
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other GPIOs, but only accessible from task contexts.
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This driver provides an in-kernel interface to those GPIOs using
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platform-neutral GPIO calls.
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config GPIO_SX150X
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bool "Semtech SX150x I2C GPIO expander"
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depends on I2C=y
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default n
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help
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Say yes here to provide support for Semtech SX150-series I2C
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GPIO expanders. Compatible models include:
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8 bits: sx1508q
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16 bits: sx1509q
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config GPIO_STMPE
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bool "STMPE GPIOs"
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depends on MFD_STMPE
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help
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This enables support for the GPIOs found on the STMPE I/O
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Expanders.
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config GPIO_TC3589X
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bool "TC3589X GPIOs"
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depends on MFD_TC3589X
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help
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This enables support for the GPIOs found on the TC3589X
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I/O Expander.
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config GPIO_TWL4030
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tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
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depends on TWL4030_CORE
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help
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Say yes here to access the GPIO signals of various multi-function
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power management chips from Texas Instruments.
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config GPIO_WM831X
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tristate "WM831x GPIOs"
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depends on MFD_WM831X
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help
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Say yes here to access the GPIO signals of WM831x power management
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chips from Wolfson Microelectronics.
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config GPIO_WM8350
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tristate "WM8350 GPIOs"
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depends on MFD_WM8350
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help
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Say yes here to access the GPIO signals of WM8350 power management
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chips from Wolfson Microelectronics.
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config GPIO_WM8994
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tristate "WM8994 GPIOs"
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depends on MFD_WM8994
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help
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Say yes here to access the GPIO signals of WM8994 audio hub
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CODECs from Wolfson Microelectronics.
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config GPIO_ADP5520
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tristate "GPIO Support for ADP5520 PMIC"
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depends on PMIC_ADP5520
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help
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This option enables support for on-chip GPIO found
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on Analog Devices ADP5520 PMICs.
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To compile this driver as a module, choose M here: the module will
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be called adp5520-gpio.
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config GPIO_ADP5588
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tristate "ADP5588 I2C GPIO expander"
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depends on I2C
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help
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This option enables support for 18 GPIOs found
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on Analog Devices ADP5588 GPIO Expanders.
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To compile this driver as a module, choose M here: the module will be
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called adp5588-gpio.
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config GPIO_ADP5588_IRQ
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bool "Interrupt controller support for ADP5588"
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depends on GPIO_ADP5588=y
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help
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Say yes here to enable the adp5588 to be used as an interrupt
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controller. It requires the driver to be built in the kernel.
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comment "PCI GPIO expanders:"
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config GPIO_CS5535
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tristate "AMD CS5535/CS5536 GPIO support"
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depends on PCI && X86 && !CS5535_GPIO
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help
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The AMD CS5535 and CS5536 southbridges support 28 GPIO pins that
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can be used for quite a number of things. The CS5535/6 is found on
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AMD Geode and Lemote Yeeloong devices.
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If unsure, say N.
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config GPIO_BT8XX
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tristate "BT8XX GPIO abuser"
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depends on PCI && VIDEO_BT848=n
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help
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The BT8xx frame grabber chip has 24 GPIO pins than can be abused
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as a cheap PCI GPIO card.
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This chip can be found on Miro, Hauppauge and STB TV-cards.
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The card needs to be physically altered for using it as a
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GPIO card. For more information on how to build a GPIO card
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from a BT8xx TV card, see the documentation file at
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Documentation/bt8xxgpio.txt
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If unsure, say N.
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config GPIO_LANGWELL
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bool "Intel Langwell/Penwell GPIO support"
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depends on PCI && X86
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help
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Say Y here to support Intel Langwell/Penwell GPIO.
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config GPIO_PCH
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tristate "PCH GPIO of Intel Topcliff"
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depends on PCI && X86
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help
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This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff
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which is an IOH(Input/Output Hub) for x86 embedded processor.
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This driver can access PCH GPIO device.
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config GPIO_ML_IOH
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tristate "OKI SEMICONDUCTOR ML7213 IOH GPIO support"
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depends on PCI
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help
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ML7213 is companion chip for Intel Atom E6xx series.
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This driver can be used for OKI SEMICONDUCTOR ML7213 IOH(Input/Output
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Hub) which is for IVI(In-Vehicle Infotainment) use.
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This driver can access the IOH's GPIO device.
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config GPIO_TIMBERDALE
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bool "Support for timberdale GPIO IP"
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depends on MFD_TIMBERDALE && GPIOLIB && HAS_IOMEM
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---help---
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Add support for the GPIO IP in the timberdale FPGA.
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config GPIO_RDC321X
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tristate "RDC R-321x GPIO support"
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depends on PCI && GPIOLIB
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select MFD_SUPPORT
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select MFD_CORE
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select MFD_RDC321X
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help
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Support for the RDC R321x SoC GPIOs over southbridge
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PCI configuration space.
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comment "SPI GPIO expanders:"
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config GPIO_MAX7301
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tristate "Maxim MAX7301 GPIO expander"
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depends on SPI_MASTER
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select GPIO_MAX730X
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help
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GPIO driver for Maxim MAX7301 SPI-based GPIO expander.
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config GPIO_MCP23S08
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tristate "Microchip MCP23Sxx I/O expander"
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depends on SPI_MASTER
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help
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SPI driver for Microchip MCP23S08/MPC23S17 I/O expanders.
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This provides a GPIO interface supporting inputs and outputs.
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config GPIO_MC33880
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tristate "Freescale MC33880 high-side/low-side switch"
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depends on SPI_MASTER
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help
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SPI driver for Freescale MC33880 high-side/low-side switch.
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This provides GPIO interface supporting inputs and outputs.
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config GPIO_74X164
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tristate "74x164 serial-in/parallel-out 8-bits shift register"
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depends on SPI_MASTER
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help
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Platform driver for 74x164 compatible serial-in/parallel-out
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8-outputs shift registers. This driver can be used to provide access
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to more gpio outputs.
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comment "AC97 GPIO expanders:"
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config GPIO_UCB1400
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bool "Philips UCB1400 GPIO"
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depends on UCB1400_CORE
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help
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This enables support for the Philips UCB1400 GPIO pins.
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The UCB1400 is an AC97 audio codec.
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To compile this driver as a module, choose M here: the
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module will be called ucb1400_gpio.
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comment "MODULbus GPIO expanders:"
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config GPIO_JANZ_TTL
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tristate "Janz VMOD-TTL Digital IO Module"
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depends on MFD_JANZ_CMODIO
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help
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This enables support for the Janz VMOD-TTL Digital IO module.
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This driver provides support for driving the pins in output
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mode only. Input mode is not supported.
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endif
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