linux-kernel - [PATCH v3 1/2] arm64: dts: allwinner: a64-amarula-relic: Add GT5663 CTP node

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Message-Id: <20190418134838.8806-1-jagan@amarulasolutions.com>
Date:   Thu, 18 Apr 2019 19:18:37 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Michael Trimarchi <michael@...rulasolutions.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-amarula@...rulasolutions.com,
        Jagan Teki <jagan@...rulasolutions.com>
Subject: [PATCH v3 1/2] arm64: dts: allwinner: a64-amarula-relic: Add GT5663 CTP node

Add Goodix GT5663 capacitive touch controller node on
Amarula A64-Relic board.

The CTP connected to board with,
- SDA, SCK from i2c1
- GPIO-LD0 as AVDD28 supply
- PH4 gpio as interrupt pin
- PH8 gpio as reset pin
- X axis is inverted
- Y axis is inverted

Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
Changes for v3:
- Use 2.8v for reg_ldo_io0
Changes for v2:
- drop i2c1, bias-pull-up

 .../allwinner/sun50i-a64-amarula-relic.dts    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
index 3575db216016..bd31a4385bc1 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-amarula-relic.dts
@@ -49,6 +49,24 @@
 	bias-pull-up;
 };
 
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	status = "okay";
+
+	touchscreen@5d {
+		compatible = "goodix,gt5663";
+		reg = <0x5d>;
+		AVDD28-supply = <&reg_ldo_io0>;			/* VCC-CTP: GPIO0-LDO */
+		interrupt-parent = <&pio>;
+		interrupts = <7 4 IRQ_TYPE_EDGE_FALLING>;
+		irq-gpios = <&pio 7 4 GPIO_ACTIVE_HIGH>;	/* CTP-INT: PH4 */
+		reset-gpios = <&pio 7 8 GPIO_ACTIVE_HIGH>;	/* CTP-RST: PH8 */
+		touchscreen-inverted-x;
+		touchscreen-inverted-y;
+	};
+};
+
 &mmc1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&mmc1_pins>;
@@ -212,6 +230,13 @@
 	regulator-name = "vdd-cpus";
 };
 
+&reg_ldo_io0 {
+	regulator-min-microvolt = <2800000>;
+	regulator-max-microvolt = <2800000>;
+	regulator-name = "vcc-ctp";
+	status = "okay";
+};
+
 &reg_rtc_ldo {
 	regulator-name = "vcc-rtc";
 };
-- 
2.18.0.321.gffc6fa0e3