Add Kinetic KTZ8866 backlight binding documentation. Signed-off-by: Jianhua Lu <lujianhua000@xxxxxxxxx> --- Changes in v2: - Remove "items" between "compatible" and "const: kinetic,ktz8866". - Change "additionalProperties" to "unevaluatedProperties". Changes in v3: - Add Krzysztof's R-b. Changes in v4: - Drop Krzysztof's R-b. - Add some new properties. Changes in v5: - Add missing enum under property description. - Rename uncorrect properties. Changes in v6: - Correct wrong property suffix and description. Changes in v7: - Add vddpos and vddeg supply. - Use enable-gpios instead of defining enable pin. .../leds/backlight/kinetic,ktz8866.yaml | 74 +++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml new file mode 100644 index 000000000000..b1d0ade0dfb6 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktz8866.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Kinetic Technologies KTZ8866 backlight + +maintainers: + - Jianhua Lu <lujianhua000@xxxxxxxxx> + +description: | + The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks + led backlight with dual lcd bias power. + https://www.kinet-ic.com/ktz8866/ + +allOf: + - $ref: common.yaml# + +properties: + compatible: + const: kinetic,ktz8866 + + vddpos-supply: + description: positive boost supply regulator. + + vddneg-supply: + description: negative boost supply regulator. + + enable-gpios: + description: GPIO to use to enable/disable the backlight (HWEN pin). + maxItems: 1 + + current-num-sinks: + description: number of the LED current sinks' channels. + enum: [1, 2, 3, 4, 5, 6] + + current-ramping-time-ms: + description: LED current ramping time in milliseconds. + enum: [2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640] + + led-ramping-time-ms: + description: | + LED on/off ramping time in milliseconds, note that the case 0 will be mapped + to 512μs because ktz8866 can't ramp faster than it. + enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384] + + kinetic,enable-lcd-bias: + description: Set if we want to output bias power supply for LCD. + type: boolean + +required: + - compatible + - vddpos-supply + - vddneg-supply + - enable-gpios + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + + backlight { + compatible = "kinetic,ktz8866"; + + vddpos-supply = <&bl_vddpos_5p5>; + vddneg-supply = <&bl_vddneg_5p5>; + enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>; + current-num-sinks = <5>; + current-ramping-time-ms = <128>; + led-ramping-time-ms = <1>; + kinetic,enable-lcd-bias; + }; -- 2.39.1
