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bb4e4a5d96
Add a driver which supports pin multiplexing setup for the most commonly used peripherals. Signed-off-by: Simon Glass <sjg@chromium.org>
127 lines
4.1 KiB
Text
127 lines
4.1 KiB
Text
#
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# PINCTRL infrastructure and drivers
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#
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menu "Pin controllers"
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config PINCTRL
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bool "Support pin controllers"
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depends on DM
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help
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This enables the basic support for pinctrl framework. You may want
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to enable some more options depending on what you want to do.
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config PINCTRL_FULL
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bool "Support full pin controllers"
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depends on PINCTRL && OF_CONTROL
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default y
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help
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This provides Linux-compatible device tree interface for the pinctrl
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subsystem. This feature depends on device tree configuration because
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it parses a device tree to look for the pinctrl device which the
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peripheral device is associated with.
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If this option is disabled (it is the only possible choice for non-DT
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boards), the pinctrl core provides no systematic mechanism for
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identifying peripheral devices, applying needed pinctrl settings.
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It is totally up to the implementation of each low-level driver.
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You can save memory footprint in return for some limitations.
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config PINCTRL_GENERIC
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bool "Support generic pin controllers"
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depends on PINCTRL_FULL
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default y
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help
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Say Y here if you want to use the pinctrl subsystem through the
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generic DT interface. If enabled, some functions become available
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to parse common properties such as "pins", "groups", "functions" and
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some pin configuration parameters. It would be easier if you only
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need the generic DT interface for pin muxing and pin configuration.
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If you need to handle vendor-specific DT properties, you can disable
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this option and implement your own set_state callback in the pinctrl
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operations.
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config PINMUX
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bool "Support pin multiplexing controllers"
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depends on PINCTRL_GENERIC
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default y
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help
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This option enables pin multiplexing through the generic pinctrl
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framework. Most SoCs have their own own multiplexing arrangement
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where a single pin can be used for several functions. An SoC pinctrl
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driver allows the required function to be selected for each pin.
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The driver is typically controlled by the device tree.
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config PINCONF
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bool "Support pin configuration controllers"
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depends on PINCTRL_GENERIC
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help
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This option enables pin configuration through the generic pinctrl
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framework.
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config SPL_PINCTRL
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bool "Support pin controlloers in SPL"
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depends on SPL && SPL_DM
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help
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This option is an SPL-variant of the PINCTRL option.
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See the help of PINCTRL for details.
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config SPL_PINCTRL_FULL
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bool "Support full pin controllers in SPL"
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depends on SPL_PINCTRL && SPL_OF_CONTROL
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default y
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help
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This option is an SPL-variant of the PINCTRL_FULL option.
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See the help of PINCTRL_FULL for details.
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config SPL_PINCTRL_GENERIC
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bool "Support generic pin controllers in SPL"
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depends on SPL_PINCTRL_FULL
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default y
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help
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This option is an SPL-variant of the PINCTRL_GENERIC option.
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See the help of PINCTRL_GENERIC for details.
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config SPL_PINMUX
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bool "Support pin multiplexing controllers in SPL"
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depends on SPL_PINCTRL_GENERIC
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default y
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help
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This option is an SPL-variant of the PINMUX option.
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See the help of PINMUX for details.
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The pinctrl subsystem can add a substantial overhead to the SPL
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image since it typically requires quite a few tables either in the
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driver or in the device tree. If this is acceptable and you need
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to adjust pin multiplexing in SPL in order to boot into U-Boot,
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enable this option. You will need to enable device tree in SPL
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for this to work.
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config SPL_PINCONF
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bool "Support pin configuration controllers in SPL"
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depends on SPL_PINCTRL_GENERIC
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help
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This option is an SPL-variant of the PINCONF option.
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See the help of PINCONF for details.
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if PINCTRL || SPL_PINCTRL
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config ROCKCHIP_PINCTRL
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bool "Rockchip pin control driver"
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depends on DM
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help
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Support pin multiplexing control on Rockchip SoCs. The driver is
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controlled by a device tree node which contains both the GPIO
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definitions and pin control functions for each available multiplex
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function.
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config PINCTRL_SANDBOX
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bool "Sandbox pinctrl driver"
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depends on SANDBOX
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help
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This enables pinctrl driver for sandbox. Currently, this driver
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actually does nothing but print debug messages when pinctrl
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operations are invoked.
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endif
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endmenu
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