arm: dts: mt2701: enable display pwm backlight

This patch adds board related config for MT2701 pwm backlight.

Signed-off-by: Weiqing Kong <weiqing.kong@mediatek.com>
Signed-off-by: Erin Lo <erin.lo@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index f48497354221d3fd786258940e4d25e2e109f4de..63af4b13a36f040c41d6d5d34f91d6a91d9c1b38 100644 (file)
--- a/arch/arm/boot/dts/mt2701-evb.dts
+++ b/arch/arm/boot/dts/mt2701-evb.dts
@@ -56,12 +56,29 @@
        bt_sco_codec:bt_sco_codec {
                compatible = "linux,bt-sco";
        };
+
+       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>;
+       };
 };
 
 &auxadc {
        status = "okay";
 };
 
+&bls {
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&pwm_bls_gpio>;
+};
+
 &i2c0 {
        pinctrl-names = "default";
        pinctrl-0 = <&i2c0_pins_a>;
@@ -111,6 +128,12 @@
                };
        };
 
+       pwm_bls_gpio: pwm_bls_gpio {
+               pins_cmd_dat {
+                       pinmux = <MT2701_PIN_208_AUD_EXT_CK1__FUNC_DISP_PWM>;
+               };
+       };
+
        spi_pins_a: spi0@0 {
                pins_spi {
                        pinmux = <MT2701_PIN_53_SPI0_CSN__FUNC_SPI0_CS>,