linux-kernel - [PATCH 2/3] arm: dts: mt2701: Add display bls related nodes for MT2701

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Date:   Thu, 1 Jun 2017 14:08:43 +0800
From:   Erin Lo <erin.lo@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        YT Shen <yt.shen@...iatek.com>,
        Weiqing Kong <weiqing.kong@...iatek.com>,
        Erin Lo <erin.lo@...iatek.com>
Subject: [PATCH 2/3] arm: dts: mt2701: Add display bls related nodes for MT2701

From: YT Shen <yt.shen@...iatek.com>

This patch adds the device node of display backlight for MT2701

Signed-off-by: Weiqing Kong <weiqing.kong@...iatek.com>
Signed-off-by: Erin Lo <erin.lo@...iatek.com>
---
 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@...0a000 {
+		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@...10000 {
 		compatible = "mediatek,mt2701-smi-larb";
 		reg = <0 0x14010000 0 0x1000>;
-- 
1.9.1