Hi, On Thu, Aug 19, 2021 at 2:31 AM yangcong <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > The auo,b101uan08.3 panel (already supported by this driver) has > a 3.3V rail that needs to be turned on. For previous users of > this panel this voltage was directly output by pmic. On a new > user (the not-yet-upstream sc7180-trogdor-mrbland board) we need > to turn the 3.3V rail on. > > Signed-off-by: yangcong <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > > --- > .../devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml b/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml > index 38bc1d1b511e..e45de7a4360e 100644 > --- a/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml > +++ b/Documentation/devicetree/bindings/display/panel/boe,tv101wum-nl6.yaml > @@ -36,6 +36,9 @@ properties: > pp1800-supply: > description: core voltage supply > > + pp3300-supply: > + description: core voltage supply > + > avdd-supply: > description: phandle of the regulator that provides positive voltage > > @@ -52,6 +55,7 @@ required: > - reg > - enable-gpios > - pp1800-supply > + - pp3300-supply Please send a v2 _without_ this line. Old device trees that don't specify the 3.3V rail need to keep working fine and thus it's optional (not required) for people to include the 3.3 V rail. (NOTE: in the source code things will work fine without any changes because the regulator framework will automatically create a "dummy" regulator for you if one wasn't specified in the device tree). -Doug
