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7b3fd8109b
1. Add nodes for the two SPI controllers found in MIPS Creator CI20.
2. Reparent SPI clock source to effectively use MPLL and set its clock
rate to 54MHz.
NOTE: To use the SPI controllers, `pinctrl-0` property must be set in
order to configure the used pins. As SPI functionality is multiplexed on
multiple pin groups, this choice is left to the user.
An example configuration:
```
&spi0 {
pinctrl-0 = <&pins_spi0>;
}
pins_spi0: spi0 {
function = "ssi0";
groups = "ssi0-dt-e", "ssi0-dr-e", "ssi0-clk-e",
"ssi0-ce0-e", "ssi0-ce1-e";
bias-disable;
};
```
Consult the CI20 pinout description for more details.
Signed-off-by: Artur Rojek <contact@artur-rojek.eu>
Link: https://lore.kernel.org/r/20210830230139.21476-4-contact@artur-rojek.eu
Signed-off-by: Mark Brown <broonie@kernel.org>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.