linux-kernel - [PATCH AUTOSEL 5.4 032/107] ARM: dts: imx6sx-sdb: Remove incorrect power supply assignment

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Message-Id: <20200124141817.28793-32-sashal@kernel.org>
Date:   Fri, 24 Jan 2020 09:17:02 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Anson Huang <Anson.Huang@....com>, Shawn Guo <shawnguo@...nel.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 032/107] ARM: dts: imx6sx-sdb: Remove incorrect power supply assignment

From: Anson Huang <Anson.Huang@....com>

[ Upstream commit d4918ebb5c256d26696a13e78ac68c146111191a ]

The vdd3p0 LDO's input should be from external USB VBUS directly, NOT
PMIC's power supply, the vdd3p0 LDO's target output voltage can be
controlled by SW, and it requires input voltage to be high enough, with
incorrect power supply assigned, if the power supply's voltage is lower
than the LDO target output voltage, it will return fail and skip the LDO
voltage adjustment, so remove the power supply assignment for vdd3p0 to
avoid such scenario.

Fixes: 37a4bdead109 ("ARM: dts: imx6sx-sdb: Assign corresponding power supply for LDOs")
Signed-off-by: Anson Huang <Anson.Huang@....com>
Signed-off-by: Shawn Guo <shawnguo@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/boot/dts/imx6sx-sdb-reva.dts | 4 ----
 arch/arm/boot/dts/imx6sx-sdb.dts      | 4 ----
 2 files changed, 8 deletions(-)

diff --git a/arch/arm/boot/dts/imx6sx-sdb-reva.dts b/arch/arm/boot/dts/imx6sx-sdb-reva.dts
index f1830ed387a55..91a7548fdb8db 100644
--- a/arch/arm/boot/dts/imx6sx-sdb-reva.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb-reva.dts
@@ -159,10 +159,6 @@
 	vin-supply = <&vgen6_reg>;
 };
 
-&reg_vdd3p0 {
-	vin-supply = <&sw2_reg>;
-};
-
 &reg_vdd2p5 {
 	vin-supply = <&vgen6_reg>;
 };
diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index a8ee7087af5a5..5a63ca6157229 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb.dts
@@ -141,10 +141,6 @@
 	vin-supply = <&vgen6_reg>;
 };
 
-&reg_vdd3p0 {
-	vin-supply = <&sw2_reg>;
-};
-
 &reg_vdd2p5 {
 	vin-supply = <&vgen6_reg>;
 };
-- 
2.20.1