linux-kernel - [RFC PATCH] ARM: dts: stm32f469-disco: use the same 3v3 for SD and DSI nodes

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Message-Id: <20230904180635.923506-1-dario.binacchi@amarulasolutions.com>
Date:   Mon,  4 Sep 2023 20:06:35 +0200
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-amarula@...rulasolutions.com,
        Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: [RFC PATCH] ARM: dts: stm32f469-disco: use the same 3v3 for SD and DSI nodes

In the board schematic, the power supply for the SD card is the same 3.3
volts used to power the LCD panel and other peripherals. By generalizing
the name of the voltage regulator, it simplifies the device tree and makes
it more readable.

Link: https://www.st.com/en/evaluation-tools/32f469idiscovery.html#cad-resources
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>

---

 arch/arm/boot/dts/st/stm32f469-disco.dts | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/arch/arm/boot/dts/st/stm32f469-disco.dts b/arch/arm/boot/dts/st/stm32f469-disco.dts
index cbbd521bf010..8a4f8ddd083d 100644
--- a/arch/arm/boot/dts/st/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/st/stm32f469-disco.dts
@@ -69,16 +69,9 @@ aliases {
 		serial0 = &usart3;
 	};
 
-	mmc_vcard: mmc_vcard {
+	vcc_3v3: vcc-3v3 {
 		compatible = "regulator-fixed";
-		regulator-name = "mmc_vcard";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-	};
-
-	vdd_dsi: vdd-dsi {
-		compatible = "regulator-fixed";
-		regulator-name = "vdd_dsi";
+		regulator-name = "vcc_3v3";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 	};
@@ -164,7 +157,7 @@ panel@0 {
 		compatible = "orisetech,otm8009a";
 		reg = <0>; /* dsi virtual channel (0..3) */
 		reset-gpios = <&gpioh 7 GPIO_ACTIVE_LOW>;
-		power-supply = <&vdd_dsi>;
+		power-supply = <&vcc_3v3>;
 		status = "okay";
 
 		port {
@@ -219,7 +212,7 @@ timer@2 {
 
 &sdio {
 	status = "okay";
-	vmmc-supply = <&mmc_vcard>;
+	vmmc-supply = <&vcc_3v3>;
 	cd-gpios = <&gpiog 2 GPIO_ACTIVE_LOW>;
 	broken-cd;
 	pinctrl-names = "default", "opendrain";
-- 
2.34.1