linux-kernel - [PATCH 3/3] ARM: dts: imx6sx: add phy-3p0-supply to usb phys

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Message-Id: <20241126-v6-12-topic-imx-3p0-regulator-v1-3-c618ed111c75@pengutronix.de>
Date: Tue, 26 Nov 2024 10:22:15 +0100
From: Stefan Kerkmann <s.kerkmann@...gutronix.de>
To: Shawn Guo <shawnguo@...nel.org>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Stefan Kerkmann <s.kerkmann@...gutronix.de>
Subject: [PATCH 3/3] ARM: dts: imx6sx: add phy-3p0-supply to usb phys

The integrated usb phys are supplied by the 3p0 regulator, which has a
voltage range of 2.625V to 3.4V. Thus the min and max values are
corrected and the regulator added as a proper supply for the usb phys.

This fixes the following warnings during the probe of the mxs_phy
driver:

mxs_phy 20c9000.usbphy: supply phy-3p0 not found, using dummy regulator
mxs_phy 20ca000.usbphy: supply phy-3p0 not found, using dummy regulator

The regulator handling was introduced by commit `966d73152078 (usb: phy:
mxs: enable regulator phy-3p0 to improve signal qualilty, 2024-07-26)`.

Signed-off-by: Stefan Kerkmann <s.kerkmann@...gutronix.de>
---
 arch/arm/boot/dts/nxp/imx/imx6sx.dtsi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi b/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
index a9550f115f82699336f62c33214c9a9bb04e79e0..5132b575b001564b9767605ae7ff044701516673 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6sx.dtsi
@@ -637,8 +637,8 @@ reg_vdd1p1: regulator-1p1 {
 				reg_vdd3p0: regulator-3p0 {
 					compatible = "fsl,anatop-regulator";
 					regulator-name = "vdd3p0";
-					regulator-min-microvolt = <2800000>;
-					regulator-max-microvolt = <3150000>;
+					regulator-min-microvolt = <2625000>;
+					regulator-max-microvolt = <3400000>;
 					regulator-always-on;
 					anatop-reg-offset = <0x120>;
 					anatop-vol-bit-shift = <8>;
@@ -731,6 +731,7 @@ usbphy1: usbphy@...9000 {
 				reg = <0x020c9000 0x1000>;
 				interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clks IMX6SX_CLK_USBPHY1>;
+				phy-3p0-supply = <&reg_vdd3p0>;
 				fsl,anatop = <&anatop>;
 			};
 
@@ -739,6 +740,7 @@ usbphy2: usbphy@...a000 {
 				reg = <0x020ca000 0x1000>;
 				interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clks IMX6SX_CLK_USBPHY2>;
+				phy-3p0-supply = <&reg_vdd3p0>;
 				fsl,anatop = <&anatop>;
 			};
 

-- 
2.39.5