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dts: flatten video's ports { port@0 { endpoint@0 { ... }; }; };
This change removes the "port@0 { ... };" block, making the devicetree less
nested while systematically including the "ports { ... };" root block.
In practice, this looks like only adding an "s" to "port" blocks, but the
changes are also semantic.
Complex configurations are still possible with this scheme:
video@10380000 {
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
#address-cells = <1>;
#size-cells = <0>;
endpoint@0 {
reg = <0>;
remote-endpoint = <&other>;
};
endpoint@1 {
reg = <1>;
remote-endpoint = <&other>;
};
};
port@1 {
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
endpoint@0 {
reg = <0>;
remote-endpoint = <&other>;
};
};
};
};
Is turned into something like this:
video@10380000 {
ports {
#address-cells = <2>;
#size-cells = <0>;
endpoint@00 {
reg = <0 0>;
data-lanes = <0 1 2 3>;
remote-endpoint = <&other>;
};
endpoint@01 {
reg = <0 1>;
data-lanes = <4 5 6 7>;
remote-endpoint = <&other>;
};
endpoint@10 {
reg = <1 0>;
data-lanes = <0 1 2 3>;
remote-endpoint = <&other>;
};
};
};
Which helps simpler device to be simpler, and allows more complex
device with arbitrary number of nesting to remain simple.
Both very-nested and completely flat (1 port 1 endpoint) look exactly
the same way, which helps with use of generic macros to traverse the
devicetree across all video devices.
The use of "ports { ... };" is required so that the "#address-cells"
property can be different between "ports" and i.e. "display-timings".
This prevents to apply devicetree properties to an entire port,
affecting each of its endpoint, but in the Linux source, this was
only used once, in imx8mp-tqma8mpql-mba8mpxl-lvds-g133han01.dtso.
Signed-off-by: Josuah Demangeon <[email protected]>- Loading branch information
