linux-kernel - [PATCH v3 1/2] ARM: dts: axp803/axp81x: Drop GPIO LDO pinctrl nodes

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Date:   Thu, 15 Sep 2022 23:27:50 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     Samuel Holland <samuel@...lland.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev
Subject: [PATCH v3 1/2] ARM: dts: axp803/axp81x: Drop GPIO LDO pinctrl nodes

The "ldo-io0" and "ldo-io1" regulators are enabled/disabled by toggling
the pinmux between two functions. This happens in the regulator driver.
Setting the pinmux to "ldo" in the DT is inappropriate because it would
enable the regulator before the driver has a chance to set the correct
initial voltage.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---

Changes in v3:
 - Added patch to remove existing "ldo" pinctrl nodes

 arch/arm/boot/dts/axp81x.dtsi             | 14 --------------
 arch/arm64/boot/dts/allwinner/axp803.dtsi | 10 ----------
 2 files changed, 24 deletions(-)

diff --git a/arch/arm/boot/dts/axp81x.dtsi b/arch/arm/boot/dts/axp81x.dtsi
index b93387b0c1c3..ebaf1c3ce8db 100644
--- a/arch/arm/boot/dts/axp81x.dtsi
+++ b/arch/arm/boot/dts/axp81x.dtsi
@@ -62,16 +62,6 @@ axp_gpio: gpio {
 		compatible = "x-powers,axp813-gpio";
 		gpio-controller;
 		#gpio-cells = <2>;
-
-		gpio0_ldo: gpio0-ldo-pin {
-			pins = "GPIO0";
-			function = "ldo";
-		};
-
-		gpio1_ldo: gpio1-ldo-pin {
-			pins = "GPIO1";
-			function = "ldo";
-		};
 	};
 
 	battery_power_supply: battery-power {
@@ -144,15 +134,11 @@ reg_fldo3: fldo3 {
 		};
 
 		reg_ldo_io0: ldo-io0 {
-			pinctrl-names = "default";
-			pinctrl-0 = <&gpio0_ldo>;
 			/* Disable by default to avoid conflicts with GPIO */
 			status = "disabled";
 		};
 
 		reg_ldo_io1: ldo-io1 {
-			pinctrl-names = "default";
-			pinctrl-0 = <&gpio1_ldo>;
 			/* Disable by default to avoid conflicts with GPIO */
 			status = "disabled";
 		};
diff --git a/arch/arm64/boot/dts/allwinner/axp803.dtsi b/arch/arm64/boot/dts/allwinner/axp803.dtsi
index 578ef368e2b4..a6b4b87f185d 100644
--- a/arch/arm64/boot/dts/allwinner/axp803.dtsi
+++ b/arch/arm64/boot/dts/allwinner/axp803.dtsi
@@ -25,16 +25,6 @@ axp_gpio: gpio {
 		compatible = "x-powers,axp803-gpio", "x-powers,axp813-gpio";
 		gpio-controller;
 		#gpio-cells = <2>;
-
-		gpio0_ldo: gpio0-ldo-pin {
-			pins = "GPIO0";
-			function = "ldo";
-		};
-
-		gpio1_ldo: gpio1-ldo-pin {
-			pins = "GPIO1";
-			function = "ldo";
-		};
 	};
 
 	battery_power_supply: battery-power {
-- 
2.35.1