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| author |   Chunfeng Yun <chunfeng.yun@mediatek.com> | 2022-09-14 14:07:41 +0800 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2022-09-20 11:59:05 +0530 |
| commit | 54511f207ca7b3e63c1fbfed949c8ef7a3faaf2b (patch) | |
| tree | 4a744f7364f5116eec3055bb7274e3e9a6ed80c1 | |
| parent | dt-bindings: phy: mediatek,tphy: add support type of SGMII (diff) | |
| download | linux-dev-54511f207ca7b3e63c1fbfed949c8ef7a3faaf2b.tar.xz linux-dev-54511f207ca7b3e63c1fbfed949c8ef7a3faaf2b.zip | |
dt-bindings: phy: mediatek,tphy: add property to set pre-emphasis
Add a property to set usb2 phy's pre-emphasis, which used to widen eye
opening and boost eye swing.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220914060746.10004-2-chunfeng.yun@mediatek.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/phy/mediatek,tphy.yaml | 10 |
1 files changed, 10 insertions, 0 deletions
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 |