[PATCH 1/2] arm64: dts: rockchip: Add avdd HDMI supplies to RockPro64 board dtsi

[Dragan Simic]

Add missing "avdd-0v9-supply" and "avdd-1v8-supply" properties to the "hdmi"
node in the Pine64 RockPro64 board dtsi file.  To achieve this, also add the
associated "vcca_0v9" regulator that produces the 0.9 V supply, [1][2] which
hasn't been defined previously in the board dtsi file.

This also eliminates the following warnings from the kernel log:

  dwhdmi-rockchip ff940000.hdmi: supply avdd-0v9 not found, using dummy regulator
  dwhdmi-rockchip ff940000.hdmi: supply avdd-1v8 not found, using dummy regulator

There are no functional changes to the way board works with these additions,
because the "vcc1v8_dvp" and "vcca_0v9" regulators are always enabled, [1][2]
but these additions improve the accuracy of hardware description.

These changes apply to the both supported hardware revisions of the Pine64
RockPro64, i.e. to the production-run revisions 2.0 and 2.1. [1][2]

[1] https://files.pine64.org/doc/rockpro64/rockpro64_v21-SCH.pdf
[2] https://files.pine64.org/doc/rockpro64/rockpro64_v20-SCH.pdf

Suggested-by: Diederik de Haas <didi.debian at cknow.org>
Signed-off-by: Dragan Simic <dsimic at manjaro.org>
---
 arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
index 69a9d6170649..47dc198706c8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
@@ -227,6 +227,16 @@ vcc5v0_usb: regulator-vcc5v0-usb {
 		vin-supply = <&vcc12v_dcin>;
 	};
 
+	vcca_0v9: regulator-vcca-0v9 {
+		compatible = "regulator-fixed";
+		regulator-name = "vcca_0v9";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <900000>;
+		regulator-max-microvolt = <900000>;
+		vin-supply = <&vcc3v3_sys>;
+	};
+
 	vdd_log: regulator-vdd-log {
 		compatible = "pwm-regulator";
 		pwms = <&pwm2 0 25000 1>;
@@ -312,6 +322,8 @@ &gmac {
 };
 
 &hdmi {
+	avdd-0v9-supply = <&vcca_0v9>;
+	avdd-1v8-supply = <&vcc1v8_dvp>;
 	ddc-i2c-bus = <&i2c3>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&hdmi_cec>;