On Fri, Mar 11, 2016 at 06:42:37PM +0300, Alexey Brodkin wrote:
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: David Airlie airlied@linux.ie Cc: dri-devel@lists.freedesktop.org Cc: devicetree@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org
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 | 72 ++++++++++++++++++++++ 1 file changed, 72 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..b130924 --- /dev/null +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt @@ -0,0 +1,72 @@ +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.
- encoder-slave: Phandle of encoder chip.
Drop this as discussed.
+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:encoder_node@0xXX{
Don't use underscores in node names. Just "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