linux-kernel - [RFC PATCH v3 1/2] arm64: dts: renesas: ulcb-kf: drop duplicate 3.3v regulators

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Message-Id: <20240117131807.24997-2-wsa+renesas@sang-engineering.com>
Date: Wed, 17 Jan 2024 14:18:06 +0100
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-renesas-soc@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH v3 1/2] arm64: dts: renesas: ulcb-kf: drop duplicate 3.3v regulators

Schematics say that all these 3.3v sources are driven by "D3.3V". We
have a regulator for it already in ulcb.dtsi. Use it instead.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---

Following a suggestion from Geert[1], let's inherit the 3.3V regulator
from ulcb.dtsi. I kept the other KF regulators because:

- 'hdmi_1v8' is really derived from d3.3v on the KingFisher board. It is
  named "T1.8V" in the schematics. Maybe we rename it?

- 'snd_vcc5v' looks like D5V to me. While it seems available on the
  connectors, it looks unused on the ULCB. So, keep it KingFisher only.
  But maybe rename it to "reg_5v"?

[1] https://lore.kernel.org/r/CAMuHMdXbpBeKNL6QC_vYTrocf7xPcvUBQmoV9vboqVt_ciio+g@mail.gmail.com

Changes since last version:

* new patch

 arch/arm64/boot/dts/renesas/ulcb-kf.dtsi | 35 +++++-------------------
 1 file changed, 7 insertions(+), 28 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 3885ef3454ff..40a5f98c1190 100644
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -32,13 +32,6 @@ hdmi1_con: endpoint {
 		};
 	};
 
-	accel_3v3: regulator-acc-3v3 {
-		compatible = "regulator-fixed";
-		regulator-name = "accel-3v3";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-	};
-
 	hdmi_1v8: regulator-hdmi-1v8 {
 		compatible = "regulator-fixed";
 		regulator-name = "hdmi-1v8";
@@ -46,20 +39,6 @@ hdmi_1v8: regulator-hdmi-1v8 {
 		regulator-max-microvolt = <1800000>;
 	};
 
-	hdmi_3v3: regulator-hdmi-3v3 {
-		compatible = "regulator-fixed";
-		regulator-name = "hdmi-3v3";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-	};
-
-	snd_3p3v: regulator-snd_3p3v {
-		compatible = "regulator-fixed";
-		regulator-name = "snd-3.3v";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-	};
-
 	snd_vcc5v: regulator-snd_vcc5v {
 		compatible = "regulator-fixed";
 		regulator-name = "snd-vcc5v";
@@ -160,7 +139,7 @@ hdmi@3d {
 				avdd-supply = <&hdmi_1v8>;
 				dvdd-supply = <&hdmi_1v8>;
 				pvdd-supply = <&hdmi_1v8>;
-				dvdd-3v-supply = <&hdmi_3v3>;
+				dvdd-3v-supply = <&reg_3p3v>;
 				bgvdd-supply = <&hdmi_1v8>;
 
 				adi,input-depth = <8>;
@@ -198,8 +177,8 @@ accelerometer@1d {
 				compatible = "st,lsm9ds0-imu";
 				reg = <0x1d>;
 
-				vdd-supply = <&accel_3v3>;
-				vddio-supply = <&accel_3v3>;
+				vdd-supply = <&reg_3p3v>;
+				vddio-supply = <&reg_3p3v>;
 			};
 
 			pcm3168a: audio-codec@44 {
@@ -209,8 +188,8 @@ pcm3168a: audio-codec@44 {
 				clocks = <&clksndsel>;
 				clock-names = "scki";
 
-				VDD1-supply = <&snd_3p3v>;
-				VDD2-supply = <&snd_3p3v>;
+				VDD1-supply = <&reg_3p3v>;
+				VDD2-supply = <&reg_3p3v>;
 				VCCAD1-supply = <&snd_vcc5v>;
 				VCCAD2-supply = <&snd_vcc5v>;
 				VCCDA1-supply = <&snd_vcc5v>;
@@ -221,8 +200,8 @@ gyroscope@6b {
 				compatible = "st,lsm9ds0-gyro";
 				reg = <0x6b>;
 
-				vdd-supply = <&accel_3v3>;
-				vddio-supply = <&accel_3v3>;
+				vdd-supply = <&reg_3p3v>;
+				vddio-supply = <&reg_3p3v>;
 			};
 		};
 	};
-- 
2.39.2