This add DT bindings documentation for ARC PGU display controller.
Signed-off-by: Alexey Brodkin <abrodkin@xxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-snps-arc@xxxxxxxxxxxxxxxxxxx
---
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 | 71 ++++++++++++++++++++++
1 file changed, 71 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..b126577
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt
@@ -0,0 +1,71 @@
+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";
+ encoder-slave = <&encoder_node>;
+
+ port {
+ pgu_output: endpoint {
+ remote-endpoint = <&hdmi_enc_input>;
+ };
+ };
+ };
+
+ /* HDMI encoder on I2C bus */
+ i2c@XXXXXXXX {
+ compatible = "...";
+
+ encoder_node:hdmi@XX{
+ compatible="...";
+
+ ports {
+ port@0 {
+ reg = <0>;
+ hdmi_enc_input:endpoint {
+ remote-endpoint = <&pgu_output>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ hdmi_enc_output:endpoint {
+ remote-endpoint = <&hdmi_connector_in>;
+ };
+ };
+ };
+ };
+ }
+
+ hdmi0: connector {
+ compatible = "hdmi-connector";
+
+ port {
+ hdmi_connector_in: endpoint {
+ remote-endpoint = <&hdmi_enc_output>;
+ };
+ };
+ };
+};
--
2.5.0
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