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upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/drivers/pinctrl/Kconfig

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pinctrl: add pin control uclass support This creates a new framework for handling of pin control devices, i.e. devices that control different aspects of package pins. This uclass handles pinmuxing and pin configuration; pinmuxing controls switching among silicon blocks that share certain physical pins, pin configuration handles electronic properties such as pin- biasing, load capacitance etc. This framework can support the same device tree bindings, but if you do not need full interface support, you can disable some features to reduce memory foot print. Typically around 1.5KB is necessary to include full-featured uclass support on ARM board (CONFIG_PINCTRL + CONFIG_PINCTRL_FULL + CONFIG_PINCTRL_GENERIC + CONFIG_PINCTRL_PINMUX), for example. We are often limited on code size for SPL. Besides, we still have many boards that do not support device tree configuration. The full pinctrl, which requires OF_CONTROL, does not make sense for those boards. So, this framework also has a Do-It-Yourself (let's say simple pinctrl) interface. With CONFIG_PINCTRL_FULL disabled, the uclass itself provides no systematic mechanism for identifying the peripheral device, applying pinctrl settings, etc. They must be done in each low-level driver. In return, you can save much memory footprint and it might be useful especially for SPL. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
9 years ago
#
# PINCTRL infrastructure and drivers
#
menu "Pin controllers"
config PINCTRL
bool "Support pin controllers"
depends on DM
help
This enables the basic support for pinctrl framework. You may want
to enable some more options depending on what you want to do.
config PINCTRL_FULL
bool "Support full pin controllers"
depends on PINCTRL && OF_CONTROL
default y
help
This provides Linux-compatible device tree interface for the pinctrl
subsystem. This feature depends on device tree configuration because
it parses a device tree to look for the pinctrl device which the
peripheral device is associated with.
If this option is disabled (it is the only possible choice for non-DT
boards), the pinctrl core provides no systematic mechanism for
identifying peripheral devices, applying needed pinctrl settings.
It is totally up to the implementation of each low-level driver.
You can save memory footprint in return for some limitations.
config PINCTRL_GENERIC
bool "Support generic pin controllers"
depends on PINCTRL_FULL
default y
help
Say Y here if you want to use the pinctrl subsystem through the
generic DT interface. If enabled, some functions become available
to parse common properties such as "pins", "groups", "functions" and
some pin configuration parameters. It would be easier if you only
need the generic DT interface for pin muxing and pin configuration.
If you need to handle vendor-specific DT properties, you can disable
this option and implement your own set_state callback in the pinctrl
operations.
config PINMUX
bool "Support pin multiplexing controllers"
depends on PINCTRL_GENERIC
default y
help
This option enables pin multiplexing through the generic pinctrl
framework.
config PINCONF
bool "Support pin configuration controllers"
depends on PINCTRL_GENERIC
help
This option enables pin configuration through the generic pinctrl
framework.
config SPL_PINCTRL
bool "Support pin controlloers in SPL"
depends on SPL && SPL_DM
help
This option is an SPL-variant of the PINCTRL option.
See the help of PINCTRL for details.
config SPL_PINCTRL_FULL
bool "Support full pin controllers in SPL"
depends on SPL_PINCTRL && SPL_OF_CONTROL
default y
help
This option is an SPL-variant of the PINCTRL_FULL option.
See the help of PINCTRL_FULL for details.
config SPL_PINCTRL_GENERIC
bool "Support generic pin controllers in SPL"
depends on SPL_PINCTRL_FULL
default y
help
This option is an SPL-variant of the PINCTRL_GENERIC option.
See the help of PINCTRL_GENERIC for details.
config SPL_PINMUX
bool "Support pin multiplexing controllers in SPL"
depends on SPL_PINCTRL_GENERIC
default y
help
This option is an SPL-variant of the PINMUX option.
See the help of PINMUX for details.
config SPL_PINCONF
bool "Support pin configuration controllers in SPL"
depends on SPL_PINCTRL_GENERIC
help
This option is an SPL-variant of the PINCONF option.
See the help of PINCONF for details.
if PINCTRL || SPL_PINCTRL
endif
endmenu