This adds documentation of device tree bindings for the
Graphics Processing Unit of hi6220 SOC.
Signed-off-by: Xinliang Liu <xinliang.liu@xxxxxxxxxx>
Signed-off-by: Xinwei Kong <kong.kongxinwei@xxxxxxxxxxxxx>
Signed-off-by: Andy Green <andy.green@xxxxxxxxxx>
Signed-off-by: Jiwen Qi <qijiwen@xxxxxxxxxxxxx>
Signed-off-by: Yu Gong <gongyu@xxxxxxxxxxxxx>
---
.../devicetree/bindings/gpu/hisilicon,hi6220.txt | 69 ++++++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
diff --git a/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
new file mode 100644
index 0000000..173ac63
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
@@ -0,0 +1,69 @@
+ * Hisilicon hi6220 Graphics Processing Unit for HiKey board
+
+ ** display-subsystem: Master device for binding DRM sub-components
+ This master device is parent node and it will be responsible to bind all
+ sub-components devices node.
+ - Required properties :
+ - compatible: "hisilicon,display-subsystem".
+ - #address-cells, #size-cells: Must be present if the device has sub-nodes.
+ - ranges: to allow probing of subdevices.
+ - dma-coherent: Present if dma operations are coherent.
+
+ ** ade: Graphic overlay, Graphic post-processing, display timing control.
+ This device is child node of display-subsystem
+ - Required properties :
+ - compatible: "hisilicon,hi6220-ade".
+ - reg: physical base address of the ADE register and length of memory
+ region.
+ - reg-names: Should contain the reg names "ade_base" and "media_base".
+ - interrupt: The interrupt number to the cpu. Defines the interrupt
+ by ADE.
+ - clocks: The clocks needed by the ADE module.
+ - clock-names: the name of the clocks.
+
+ ** dsi: support mipi dsi interface
+ This device is child node of display-subsystem
+ - Required properties :
+ - compatible: "hisilicon,hi6220-dsi".
+ - reg: physical base address of the DSI register and length of memory
+ region.
+ - clocks: The clocks needed by the DSI module.
+ - clock-names: the name of the clocks.
+ - encoder-slave: phandles to a 'encoder-slave' subnode which DSI connect
+ ADV7533 in order to support hdmi display.
+
+Example:
+
+ display-subsystem {
+ compatible = "hisilicon,display-subsystem";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ dma-coherent;
+
+ ade: ade@f4100000 {
+ compatible = "hisilicon,hi6220-ade";
+ reg = <0x0 0xf4100000 0x0 0x7800>,
+ <0x0 0xf4410000 0x0 0x1000>;
+ reg-names = "ade_base",
+ "media_base";
+ interrupts = <0 115 4>;
+
+ clocks = <&media_ctrl HI6220_ADE_CORE>,
+ <&media_ctrl HI6220_CODEC_JPEG>,
+ <&media_ctrl HI6220_ADE_PIX_SRC>;
+ /*clock name*/
+ clock-names = "clk_ade_core",
+ "aclk_codec_jpeg_src",
+ "clk_ade_pix";
+ };
+
+ dsi {
+ compatible = "hisilicon,hi6220-dsi";
+ reg = <0x0 0xf4107800 0x0 0x100>;
+ clocks = <&media_ctrl HI6220_DSI_PCLK>;
+ clock-names = "pclk_dsi";
+ encoder-slave = <&adv7533>;
+ };
+ };
+
--
1.9.1
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