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>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index f48497354221..63af4b13a36f 100644
--- 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>,