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 --- 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>; + };