Add DT bindings documentmation for the HDP-TX PHY controller. The describes
which could be found on NXP Layerscape ls1028a platform.
Signed-off-by: Wen He <wen.he_1@xxxxxxx>
---
change in v2:
- correction the node name.
.../devicetree/bindings/display/fsl,hdp.txt | 56 +++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/fsl,hdp.txt
diff --git a/Documentation/devicetree/bindings/display/fsl,hdp.txt b/Documentation/devicetree/bindings/display/fsl,hdp.txt
new file mode 100644
index 000000000000..53ca08337587
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/fsl,hdp.txt
@@ -0,0 +1,56 @@
+NXP Layerscpae ls1028a HDP-TX PHY Controller
+============================================
+
+The following bindings describe the Cadence HDP TX PHY on ls1028a that
+offer multi-protocol support of standars such as eDP and Displayport,
+supports for 25-600MHz pixel clock and up to 4k2k at 60MHz resolution.
+The HDP transmitter is a Cadence HDP TX controller IP with a companion
+PHY IP.
+
+Required properties:
+ - compatible: Should be "fsl,ls1028a-dp" for ls1028a.
+ - reg: Physical base address and size of the block of registers used
+ by the processor.
+ - interrupts: HDP hotplug in/out detect interrupt number
+ - clocks: A list of phandle + clock-specifier pairs, one for each entry
+ in 'clock-names'
+ - clock-names: A list of clock names. It should contain:
+ - "clk_ipg": inter-Integrated circuit clock
+ - "clk_core": for the Main Display TX controller clock
+ - "clk_pxl": for the pixel clock feeding the output PLL of the processor
+ - "clk_pxl_mux": for the high PerfPLL bypass clock
+ - "clk_pxl_link": for the link rate pixel clock
+ - "clk_apb": for the APB interface clock
+ - "clk_vif": for the Video pixel clock
+
+Required sub-nodes:
+ - port: The HDP connection to an encoder output port. The connection
+ is modelled using the OF graph bindings specified in
+ Documentation/devicetree/bindings/graph.txt
+
+
+Example:
+
+/ {
+ ...
+
+ hdptx0: display@f200000 {
+ compatible = "fsl,ls1028a-dp";
+ reg = <0x0 0xf1f0000 0x0 0xffff>,
+ <0x0 0xf200000 0x0 0xfffff>;
+ interrupts = <0 221 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&sysclk>, <&hdpclk>, <&dpclk>,
+ <&dpclk>, <&dpclk>, <&pclk>, <&dpclk>;
+ clock-names = "clk_ipg", "clk_core", "clk_pxl",
+ "clk_pxl_mux", "clk_pxl_link", "clk_apb",
+ "clk_vif";
+
+ port {
+ dp1_output: endpoint {
+ remote-endpoint = <&dp0_input>;
+ };
+ };
+ };
+
+ ...
+};
--
2.17.1
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