[PATCH v5 1/4] dt-bindings: display: mediatek: add property to control mipi tx drive current

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Add a property to control mipi tx drive current:
"drive-strength-microamp"

Reviewed-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
---
 .../devicetree/bindings/display/mediatek/mediatek,dsi.txt    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
index a19a6cc375ed..d78b6d6d8fab 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
@@ -33,6 +33,10 @@ Required properties:
 - #clock-cells: must be <0>;
 - #phy-cells: must be <0>.
 
+Optional properties:
+- drive-strength-microamp: adjust driving current, should be 3000 ~ 6000. And
+						   the step is 200.
+
 Example:
 
 mipi_tx0: mipi-dphy@10215000 {
@@ -42,6 +46,7 @@ mipi_tx0: mipi-dphy@10215000 {
 	clock-output-names = "mipi_tx0_pll";
 	#clock-cells = <0>;
 	#phy-cells = <0>;
+	drive-strength-microamp = <4600>;
 };
 
 dsi0: dsi@1401b000 {
-- 
2.21.0
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