This add DT bindings documentation for ARC PGU display controller.
Signed-off-by: Alexey Brodkin abrodkin@synopsys.com Cc: Rob Herring robh+dt@kernel.org 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 ---
Changes v4 -> v5: (addressing Rob's comment) * Added Rob's acked-by * Remove "encoder-slave" from the example as well. Now only "pgu" node is mentioned in the example.
Changes v3 -> v4: (addressing Rob's comments) * Removed "encoder-slave" from required properties * Removed "0x" from node names
Changes v2 -> v3: * Reverted back to initial larger version of example with minor fixes (thanks Rob for spotting those).
Changes v1 -> v2: * Removed everything except PGU node itself.
.../devicetree/bindings/display/snps,arcpgu.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt
diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt b/Documentation/devicetree/bindings/display/snps,arcpgu.txt new file mode 100644 index 0000000..c5c7dfd --- /dev/null +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt @@ -0,0 +1,35 @@ +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>; + }; + }; + }; +};