Re: [PATCH v2 7/8] arm64: dts: mediatek: cherry: Enable keyboard PWM backlight

AngeloGioacchino Del Regno
2022-07-25T10:04:17Z

Il 25/07/22 11:57, Chen-Yu Tsai ha scritto:
> n Thu, Jul 21, 2022 at 10:53 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@collabora.com> wrote:
>>
>> Add a pwm-leds node to enable the PWM controlled keyboard backlight.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
>> ---
>> arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 13 +++++++++++++
>> 1 file changed, 13 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
>> index ca9955a97f8f..9086a440a995 100644
>> --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
>> +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
>> @@ -4,6 +4,7 @@
>> */
>>
>> #include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/leds/common.h>
>> #include "mt8195.dtsi"
>> #include "mt6359.dtsi"
>>
>> @@ -31,6 +32,18 @@ dmic_codec: dmic-codec {
>> wakeup-delay-ms = <50>;
>> };
>>
>> + led-controller {
>> + compatible = "pwm-leds";
>> +
>> + keyboard_backlight: keyboard-backlight {
>> + default-state = "off";
>> + function = LED_FUNCTION_KBD_BACKLIGHT;
>> + label = "cros_ec::kbd_backlight";
>> + max-brightness = <1023>;
>> + pwms = <&cros_ec_pwm 3>;
>> + };
>> + };
>> +
>
> This didn't work for me. However using "google,cros-kbd-led-backlight"
> under the EC did. That might be a better option.

Strange. But okay if there's a better option I'll check that out for v3.

Cheers!
Angelo

>
> ChenYu
>
>> memory@40000000 {
>> device_type = "memory";
>> reg = <0 0x40000000 0 0x80000000>;
>> --
>> 2.35.1
>>
>>
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