[PATCH v2 2/7] dt-bindings: phy: mediatek,tphy: add property to set pre-emphasis
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: 2022-08-29 08:08:56
Also in:
linux-arm-kernel, linux-devicetree, linux-mediatek, lkml
Subsystem:
arm/mediatek usb3 phy driver, generic phy framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Chunfeng Yun, Vinod Koul, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Add a property to set usb2 phy's pre-emphasis, which used to widen eye opening and boost eye swing. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- v2: Add more description suggested by Krzysztof --- .../devicetree/bindings/phy/mediatek,tphy.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
index 848edfb1f677..e0754fb44451 100644
--- a/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
+++ b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml@@ -219,6 +219,16 @@ patternProperties: minimum: 1 maximum: 15 + mediatek,pre-emphasis: + description: + The level of pre-emphasis which used to widen the eye opening and + boost eye swing, the unit step is about 4.16% increment; e.g. the + level 1 means amplitude increases about 4.16%, the level 2 is about + 8.3% etc. (U2 phy) + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 3 + mediatek,bc12: description: Specify the flag to enable BC1.2 if support it
--
2.18.0
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