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

[Jagan Teki]

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 <ja...@amarulasolutions.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