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From:   Jagan Teki <jagan@amarulasolutions.com>
To:     Maxime Ripard <maxime.ripard@bootlin.com>,
        Chen-Yu Tsai <wens@csie.org>, Icenowy Zheng <icenowy@aosc.io>,
        Jernej Skrabec <jernej.skrabec@siol.net>,
        Vasily Khoruzhick <anarsoul@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        David Airlie <airlied@linux.ie>,
        dri-devel@lists.freedesktop.org,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, linux-clk@vger.kernel.org,
        Michael Trimarchi <michael@amarulasolutions.com>,
        linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com
Cc:     Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH v3 24/25] [DO NOT MERGE] arm64: dts: allwinner: bananapi-m64: Bananapi S070WV20-CT16 DSI panel
Date:   Fri, 26 Oct 2018 20:13:43 +0530
Message-Id: <20181026144344.27778-25-jagan@amarulasolutions.com>
In-Reply-To: <20181026144344.27778-1-jagan@amarulasolutions.com>
References: <20181026144344.27778-1-jagan@amarulasolutions.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This patch add support for Bananapi S070WV20-CT16 DSI panel to
BPI-M64 board.

DSI panel connected via board DSI port with,
- DC1SW as AVDD supply
- DCDC1 as DVDD supply
- PD6 gpio for reset pin
- PD5 gpio for backlight enable pin
- PD7 gpio for backlight vdd supply

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v2:
- remove unit address 0
- add nodes in alphabetical order
- Use backlight instead of backlight_dsi
- add tested credit
Changes for v2:
- Use quadratic rule on pwm brightness

 .../dts/allwinner/sun50i-a64-bananapi-m64.dts | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts
index ef1c90401bb2..6cb010e3bbd9 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts
@@ -45,6 +45,7 @@
 #include "sun50i-a64.dtsi"
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pwm/pwm.h>
 
 / {
 	model = "BananaPi-M64";
@@ -56,6 +57,15 @@
 		serial1 = &uart1;
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&r_pwm 0 50000 PWM_POLARITY_INVERTED>;
+		brightness-levels = <1 2 4 8 16 32 64 128 512>;
+		default-brightness-level = <2>;
+		enable-gpios = <&pio 3 5 GPIO_ACTIVE_HIGH>; /* LCD-BL-EN: PD5 */
+		power-supply = <&reg_vdd_backlight>;
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
@@ -91,6 +101,15 @@
 		};
 	};
 
+	reg_vdd_backlight: vdd-backlight {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd-backlight";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&pio 3 7 GPIO_ACTIVE_HIGH>; /* LCD-PWR-EN: PD7 */
+		enable-active-high;
+	};
+
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
@@ -101,6 +120,23 @@
 	status = "okay";
 };
 
+&dphy {
+	status = "okay";
+};
+
+&dsi {
+	status = "okay";
+
+	panel@0 {
+		compatible = "bananapi,s070wv20-ct16-icn6211";
+		reg = <0>;
+		avdd-supply = <&reg_dc1sw>;
+		dvdd-supply = <&reg_dldo1>;
+		reset-gpios = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD6 */
+		backlight = <&backlight>;
+	};
+};
+
 &ehci0 {
 	status = "okay";
 };
@@ -193,6 +229,12 @@
 	status = "okay";
 };
 
+&r_pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&r_pwm_pin>;
+	status = "okay";
+};
+
 &r_rsb {
 	status = "okay";
 
-- 
2.18.0.321.gffc6fa0e3