Hi Maxime, Thank you for the patch. On Thursday, 21 December 2017 13:02:27 EET Maxime Ripard wrote: > The power-supply property is used by a vast majority of panels, including > panel-simple. Let's document it as a common property > > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> > --- > Documentation/devicetree/bindings/display/panel/panel-common.txt | 6 ++++++ > Documentation/devicetree/bindings/display/panel/panel-lvds.txt | 1 + > Documentation/devicetree/bindings/display/panel/simple-panel.txt | 2 +- 3 > files changed, 8 insertions(+), 1 deletion(-) > > diff --git > a/Documentation/devicetree/bindings/display/panel/panel-common.txt > b/Documentation/devicetree/bindings/display/panel/panel-common.txt index > ec52c472c845..125ea68052af 100644 > --- a/Documentation/devicetree/bindings/display/panel/panel-common.txt > +++ b/Documentation/devicetree/bindings/display/panel/panel-common.txt > @@ -78,6 +78,12 @@ used for panels that implement compatible control > signals. while active. Active high reset signals can be supported by > inverting the GPIO specifier polarity flag. > > +Power > +----- > + > +- power-supply: many display panels need an additional power supply in > + order to be fully powered-up. For such panels, power-supply contains > + a phandle to the regulator powering the panel. I think we should give more details here about the limitations of this property. How about the following explanation ? - power-supply: display panels require power to be supplied. While several panels need more than one power supply with panel-specific constraints governing the order and timings of the power supplies, in many cases a single power supply is sufficient, either because the panel has a single power rail, or because all its power rails can be driven by the same supply. In that case the power-supply property specifies the supply powering the panel as a phandle to a regulator. > Backlight > --------- > diff --git a/Documentation/devicetree/bindings/display/panel/panel-lvds.txt > b/Documentation/devicetree/bindings/display/panel/panel-lvds.txt index > b938269f841e..250850a2150b 100644 > --- a/Documentation/devicetree/bindings/display/panel/panel-lvds.txt > +++ b/Documentation/devicetree/bindings/display/panel/panel-lvds.txt > @@ -32,6 +32,7 @@ Optional properties: > - label: See panel-common.txt. > - gpios: See panel-common.txt. > - backlight: See panel-common.txt. > +- power-supply: See panel-common.txt. > - data-mirror: If set, reverse the bit order described in the data mappings > below on all data lanes, transmitting bits for slots 6 to 0 instead of 0 to > 6. > diff --git > a/Documentation/devicetree/bindings/display/panel/simple-panel.txt > b/Documentation/devicetree/bindings/display/panel/simple-panel.txt index > 1341bbf4aa3d..16d8ff088b7d 100644 > --- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt > +++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt > @@ -1,7 +1,7 @@ > Simple display panel > > Required properties: > -- power-supply: regulator to provide the supply voltage > +- power-supply: See panel-common.txt > > Optional properties: > - ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
