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SubjectRe: [PATCH 02/11] dt-bindings: phy-mtk-tphy: make the ref clock optional
On Fri, Aug 23, 2019 at 03:00:09PM +0800, Chunfeng Yun wrote:
> Make the ref clock optional, then we no need refer to a fixed-clock
> in DTS anymore when the clock of USB3 PHY comes from oscillator
> directly
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> .../devicetree/bindings/phy/phy-mtk-tphy.txt | 13 +++++++------
> 1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> index d5b327f85fa2..1c18bf10b2fe 100644
> --- a/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> +++ b/Documentation/devicetree/bindings/phy/phy-mtk-tphy.txt
> @@ -34,12 +34,6 @@ Optional properties (controller (parent) node):
>
> Required properties (port (child) node):
> - reg : address and length of the register set for the port.
> -- clocks : a list of phandle + clock-specifier pairs, one for each
> - entry in clock-names
> -- clock-names : must contain
> - "ref": 48M reference clock for HighSpeed analog phy; and 26M
> - reference clock for SuperSpeed analog phy, sometimes is
> - 24M, 25M or 27M, depended on platform.
> - #phy-cells : should be 1 (See second example)
> cell after port phandle is phy type from:
> - PHY_TYPE_USB2
> @@ -48,6 +42,13 @@ Required properties (port (child) node):
> - PHY_TYPE_SATA
>
> Optional properties (PHY_TYPE_USB2 port (child) node):
> +- clocks : a list of phandle + clock-specifier pairs, one for each
> + entry in clock-names
> +- clock-names : may contain
> + "ref": 48M reference clock for HighSpeed anolog phy; and 26M
> + reference clock for SuperSpeed anolog phy, sometimes is
> + 24M, 25M or 27M, depended on platform.

How do you know the frequency when it is not present?

> +
> - mediatek,eye-src : u32, the value of slew rate calibrate
> - mediatek,eye-vrt : u32, the selection of VRT reference voltage
> - mediatek,eye-term : u32, the selection of HS_TX TERM reference voltage
> --
> 2.23.0
>

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