linux-kernel - [PATCH v3 02/10] arm: dts: mt2701: enable display pwm backlight

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Message-ID: <0f9441e9fc40e47e94927a3a4c96dd3f7f287d94.1506908511.git.ryder.lee@mediatek.com>
Date:   Mon, 2 Oct 2017 09:54:52 +0800
From:   Ryder Lee <ryder.lee@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Erin Lo <erin.lo@...iatek.com>, YT Shen <yt.shen@...iatek.com>,
        Weiqing Kong <weiqing.kong@...iatek.com>,
        Ryder Lee <ryder.lee@...iatek.com>
Subject: [PATCH v3 02/10] arm: dts: mt2701: enable display pwm backlight

From: Weiqing Kong <weiqing.kong@...iatek.com>

This patch adds board related config for MT2701 pwm backlight.

Signed-off-by: Weiqing Kong <weiqing.kong@...iatek.com>
Signed-off-by: Erin Lo <erin.lo@...iatek.com>
Signed-off-by: Ryder Lee <ryder.lee@...iatek.com>
---
 arch/arm/boot/dts/mt2701-evb.dts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index f484973..63af4b1 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>,
-- 
1.9.1