drm: Add DT bindings documentation for ARC PGU display controller

This add DT bindings documentation for ARC PGU display controller.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Acked-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Alexey Brodkin 2016-02-19 15:35:52 +03:00
parent 51dacf2089
commit a1f8ebe5cf

View File

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ARC PGU
This is a display controller found on several development boards produced
by Synopsys. The ARC PGU is an RGB streamer that reads the data from a
framebuffer and sends it to a single digital encoder (usually HDMI).
Required properties:
- compatible: "snps,arcpgu"
- reg: Physical base address and length of the controller's registers.
- clocks: A list of phandle + clock-specifier pairs, one for each
entry in 'clock-names'.
- clock-names: A list of clock names. For ARC PGU it should contain:
- "pxlclk" for the clock feeding the output PLL of the controller.
Required sub-nodes:
- port: The PGU connection to an encoder chip.
Example:
/ {
...
pgu@XXXXXXXX {
compatible = "snps,arcpgu";
reg = <0xXXXXXXXX 0x400>;
clocks = <&clock_node>;
clock-names = "pxlclk";
port {
pgu_output: endpoint {
remote-endpoint = <&hdmi_enc_input>;
};
};
};
};