From: YT Shen <yt.shen@xxxxxxxxxxxx>
This patch adds the device node of display backlight for MT2701
Signed-off-by: Weiqing Kong <weiqing.kong@xxxxxxxxxxxx>
Signed-off-by: Erin Lo <erin.lo@xxxxxxxxxxxx>
---
arch/arm/boot/dts/mt2701-evb.dts | 29 +++++++++++++++++++++++++++++
arch/arm/boot/dts/mt2701.dtsi | 9 +++++++++
2 files changed, 38 insertions(+)
diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index a483798..e49c2b7 100644
--- a/arch/arm/boot/dts/mt2701-evb.dts
+++ b/arch/arm/boot/dts/mt2701-evb.dts
@@ -22,6 +22,35 @@
memory {
reg = <0 0x80000000 0 0x40000000>;
};
+
+ backlight_lcd: backlight_lcd {
+ compatible = "pwm-backlight";
+ pwms = <&bls 0 100000>;
+ brightness-levels = <
+ 0 16 32 48 64 80 96 112
+ 128 144 160 176 192 208 224 240
+ 255
+ >;
+ default-brightness-level = <9>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm_bls_gpio>;
+ };
+};
+
+&bls {
+ status = "okay";
+};
+
+&mmsys {
+ status = "okay";
+};
+
+&pio {
+ pwm_bls_gpio: pwm_bls_gpio {
+ pins_cmd_dat {
+ pinmux = <MT2701_PIN_208_AUD_EXT_CK1__FUNC_DISP_PWM>;
+ };
+ };
};
&auxadc {
diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index de88bd7..4f110d5 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -366,6 +366,15 @@
#clock-cells = <1>;
};
+ bls: bls@1400a000 {
+ compatible = "mediatek,mt2701-disp-pwm";
+ reg = <0 0x1400a000 0 0x1000>;
+ #pwm-cells = <2>;
+ clocks = <&mmsys CLK_MM_MDP_BLS_26M>, <&mmsys CLK_MM_DISP_BLS>;
+ clock-names = "main", "mm";
+ status = "disabled";
+ };
+
larb0: larb@14010000 {
compatible = "mediatek,mt2701-smi-larb";
reg = <0 0x14010000 0 0x1000>;
--
1.9.1
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