On Wed, Aug 19, 2020 at 10:51:49PM +0200, Linus Walleij wrote: > This adds device tree bindings for the Kinetic KTD253 > white LED backlight driver. > > Cc: devicetree@xxxxxxxxxxxxxxx > Cc: Sam Ravnborg <sam@xxxxxxxxxxxx> > Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Reviewed-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx> > --- > ChangeLog v2->v3: > - Drop the pointless cargo-culted "default-on" property that > we were not using > - Correct the brightness in the example to something legal (13) > ChangeLog v1->v2: > - Create common.yaml for backlight as suggested by Sam and > use that. > - Rename the GPIO line "enable-gpios" > --- > .../leds/backlight/kinetic,ktd253.yaml | 46 +++++++++++++++++++ > 1 file changed, 46 insertions(+) > create mode 100644 Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml > > diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml > new file mode 100644 > index 000000000000..7a6ec1f8c0f3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml > @@ -0,0 +1,46 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Kinetic Technologies KTD253 one-wire backlight > + > +maintainers: > + - Linus Walleij <linus.walleij@xxxxxxxxxx> > + > +description: | > + The Kinetic Technologies KTD253 is a white LED backlight that is > + controlled by a single GPIO line. If you just turn on the backlight > + it goes to maximum backlight then you can set the level of backlight > + using pulses on the enable wire. This is sometimes referred to as > + "expresswire". > + > +allOf: > + - $ref: common.yaml# > + > +properties: > + compatible: > + const: kinetic,ktd253 > + > + enable-gpios: > + description: GPIO to use to enable/disable and dim the backlight. > + maxItems: 1 > + > + default-brightness: true > + max-brightness: true > + > +required: > + - compatible > + - enable-gpios > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + backlight { > + compatible = "kinetic,ktd253"; > + enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>; > + default-brightness = <13>; > + }; > -- > 2.26.2 >
