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dt-bindings: phy-mtk-tphy: add properties for U2 slew rate calibrate

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Add two properties of ref_clk and coefficient used by U2 slew rate
calibrate which may vary on different SoCs

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Chunfeng Yun 2018-03-12 13:25:40 +08:00 committed by Kishon Vijay Abraham I
parent 8833ebf4f8
commit c55fbcb8cf
1 changed files with 4 additions and 0 deletions
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4
Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
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@ -27,6 +27,10 @@ Optional properties (controller (parent) node):
- reg : offset and length of register shared by multiple ports,
exclude port's private register. It is needed on mt2701
and mt8173, but not on mt2712.
- mediatek,src-ref-clk-mhz : frequency of reference clock for slew rate
calibrate
- mediatek,src-coef : coefficient for slew rate calibrate, depends on
SoC process
Required properties (port (child) node):
- reg : address and length of the register set for the port.