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    Subject[PATCH v5 4/4] tegra: ventana: add pwm backlight DT nodes
    Date
    Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
    ---
    arch/arm/boot/dts/tegra20-ventana.dts | 59 ++++++++++++++++++++++++++++++++++-
    1 file changed, 58 insertions(+), 1 deletion(-)

    diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts
    index 4ec6b4c..025928d 100644
    --- a/arch/arm/boot/dts/tegra20-ventana.dts
    +++ b/arch/arm/boot/dts/tegra20-ventana.dts
    @@ -467,6 +467,63 @@
    bus-width = <8>;
    };

    + backlight {
    + compatible = "pwm-backlight";
    + brightness-levels = <0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 255>;
    + default-brightness-level = <12>;
    +
    + /* resources used by the power sequences */
    + pwms = <&pwm 2 5000000>;
    + pwm-names = "backlight";
    + power-supply = <&vdd_bl_reg>;
    +
    + power-sequences {
    + power-on {
    + step0 {
    + type = "regulator";
    + id = "power";
    + enable;
    + };
    + step1 {
    + type = "delay";
    + delay_us = <10000>;
    + };
    + step2 {
    + type = "pwm";
    + id = "backlight";
    + enable;
    + };
    + step3 {
    + type = "gpio";
    + number = <&gpio 28 0>;
    + enable;
    + };
    + };
    +
    + power-off {
    + step0 {
    + type = "gpio";
    + number = <&gpio 28 0>;
    + disable;
    + };
    + step1 {
    + type = "pwm";
    + id = "backlight";
    + disable;
    + };
    + step2 {
    + type = "delay";
    + delay_us = <10000>;
    + };
    + step3 {
    + type = "regulator";
    + id = "power";
    + disable;
    + };
    + };
    + };
    + };
    +
    regulators {
    compatible = "simple-bus";
    #address-cells = <1>;
    @@ -510,7 +567,7 @@
    enable-active-high;
    };

    - regulator@4 {
    + vdd_bl_reg: regulator@4 {
    compatible = "regulator-fixed";
    reg = <4>;
    regulator-name = "vdd_bl";
    --
    1.7.12


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