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@vger.kernel.org Cc: Sam Ravnborg sam@ravnborg.org Signed-off-by: Linus Walleij linus.walleij@linaro.org
Reviewed-by: Daniel Thompson daniel.thompson@linaro.org
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@linaro.org
+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