Hi, Jitao: On Mon, 2019-12-16 at 16:29 +0800, Jitao Shi wrote: > Add a property to control mipi tx drive current: > "mipitx-current-drive" > > Signed-off-by: Jitao Shi <jitao....@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..780201ddcd5c 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: > +- mipitx-current-drive: adjust driving current, should be 1 ~ 0xF > +
In "[PATCH 3/4] drm/mediatek: add the mipitx driving control" [1], I see that you actually control a register its name is MIPITX_VOLTAGE_SEL, so I guess this control the voltage. If mipi_tx has the ability to control the voltage, could we just treat mipi_tx as a regulator? For a regulator, regulator-min-microvolt and regulator-max-microvolt would limit the volt range and you could get it by of_get_regulator_init_data(). If it actually control the current, regulator-min-microamp and regulator-max-microamp could be used. I'm not expert on this, so please give me more information on this. [1] http://lists.infradead.org/pipermail/linux-mediatek/2019-December/025638.html Regards, CK > 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>; > + mipitx-current-drive = <0x8>; > }; > > dsi0: dsi@1401b000 { _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
