[PATCH] dt-bindings: display: mediatek: dpi: add power-domains property

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DPI is part of the display / multimedia block in MediaTek SoCs
and is managed using power controller in some platforms. We add
the power-domains property to the binding documentation.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@xxxxxxxxxxxx>
---
 .../devicetree/bindings/display/mediatek/mediatek,dpi.yaml   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
index 5bb23e97cf33..9f012afdf19b 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
@@ -58,6 +58,9 @@ properties:
       Output port node. This port should be connected to the input port of an
       attached HDMI, LVDS or DisplayPort encoder chip.
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -72,11 +75,13 @@ examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/clock/mt8173-clk.h>
+    #include <dt-bindings/power/mt8173-power.h>
 
     dpi0: dpi@1401d000 {
         compatible = "mediatek,mt8173-dpi";
         reg = <0x1401d000 0x1000>;
         interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_LOW>;
+        power-domains = <&spm MT8173_POWER_DOMAIN_MM>;
         clocks = <&mmsys CLK_MM_DPI_PIXEL>,
              <&mmsys CLK_MM_DPI_ENGINE>,
              <&apmixedsys CLK_APMIXED_TVDPLL>;
-- 
2.18.0




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