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SubjectRe: [PATCH v3 1/4] dt-bindings: display: mediatek: add property to control mipi tx drive current
On Wed, Mar 11, 2020 at 03:40:29PM +0800, Jitao Shi wrote:
> Add a property to control mipi tx drive current:
> "drive-strength-microamp"
>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> ---
> .../devicetree/bindings/display/mediatek/mediatek,dsi.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> index a19a6cc375ed..d501f9ff4b1f 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.txt
> @@ -33,6 +33,9 @@ Required properties:
> - #clock-cells: must be <0>;
> - #phy-cells: must be <0>.
>
> +Optional properties:
> +- drive-strength-microamp: adjust driving current, should be 1 ~ 0xF

TBC, 1-0xf is in units of microamps? So a max drive strength of 15uA?
Seems a bit low.

> +
> Example:
>
> mipi_tx0: mipi-dphy@10215000 {
> @@ -42,6 +45,7 @@ mipi_tx0: mipi-dphy@10215000 {
> clock-output-names = "mipi_tx0_pll";
> #clock-cells = <0>;
> #phy-cells = <0>;
> + drive-strength-microamp = <0x8>;
> };
>
> dsi0: dsi@1401b000 {
> --
> 2.21.0

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