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arm64: dts: mediatek: spherion: Add keyboard backlight

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The Spherion board has keyboard backlight controlled by the PWM signal
generated by the ChromeOS EC.

Enable PWM output for ChromeOS EC and add a PWM controlled LED node for
the keyboard backlight.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220629155956.1138955-13-nfraprado@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Nícolas F. R. A. Prado 2022-06-29 11:59:49 -04:00 committed by Matthias Brugger
parent cbd4af081a
commit 6812f4ed6e
1 changed files with 16 additions and 0 deletions
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16
arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dts
View file

@ -4,12 +4,28 @@
*/
/dts-v1/;
#include "mt8192-asurada.dtsi"
#include <dt-bindings/leds/common.h>
/ {
model = "Google Spherion (rev0 - 3)";
compatible = "google,spherion-rev3", "google,spherion-rev2",
"google,spherion-rev1", "google,spherion-rev0",
"google,spherion", "mediatek,mt8192";
pwmleds {
compatible = "pwm-leds";
led {
function = LED_FUNCTION_KBD_BACKLIGHT;
color = <LED_COLOR_ID_WHITE>;
pwms = <&cros_ec_pwm 0>;
max-brightness = <1023>;
};
};
};
&cros_ec_pwm {
status = "okay";
};
&keyboard_controller {