This is a note to let you know that I've just added the patch titled
arm64: dts: imx8mn-ddr4-evk: correct ldo1/ldo2 voltage range
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-imx8mn-ddr4-evk-correct-ldo1-ldo2-voltage-range.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cfb12c8952f617df58d73d24161e539a035d82b0 Mon Sep 17 00:00:00 2001
From: Robin Gong <yibin.gong@xxxxxxx>
Date: Fri, 22 May 2020 18:44:51 +0800
Subject: arm64: dts: imx8mn-ddr4-evk: correct ldo1/ldo2 voltage range
From: Robin Gong <yibin.gong@xxxxxxx>
commit cfb12c8952f617df58d73d24161e539a035d82b0 upstream.
Correct ldo1 voltage range from wrong high group(3.0V~3.3V) to low group
(1.6V~1.9V) because the ldo1 should be 1.8V. Actually, two voltage groups
have been supported at bd718x7-regulator driver, hence, just corrrect the
voltage range to 1.6V~3.3V. For ldo2@0.8V, correct voltage range too.
Otherwise, ldo1 would be kept @3.0V and ldo2@0.9V which violate i.mx8mn
datasheet as the below warning log in kernel:
[ 0.995524] LDO1: Bringing 1800000uV into 3000000-3000000uV
[ 0.999196] LDO2: Bringing 800000uV into 900000-900000uV
Fixes: 3e44dd09736d ("arm64: dts: imx8mn-ddr4-evk: Add rohm,bd71847 PMIC support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Robin Gong <yibin.gong@xxxxxxx>
Reviewed-by: Dong Aisheng <aisheng.dong@xxxxxxx>
Reviewed-by: Fabio Estevam <festevam@xxxxxxxxx>
Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
@@ -268,7 +268,7 @@
ldo1_reg: LDO1 {
regulator-name = "LDO1";
- regulator-min-microvolt = <3000000>;
+ regulator-min-microvolt = <1600000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
@@ -276,7 +276,7 @@
ldo2_reg: LDO2 {
regulator-name = "LDO2";
- regulator-min-microvolt = <900000>;
+ regulator-min-microvolt = <800000>;
regulator-max-microvolt = <900000>;
regulator-boot-on;
regulator-always-on;
Patches currently in stable-queue which might be from yibin.gong@xxxxxxx are
queue-5.4/arm64-dts-imx8mm-evk-correct-ldo1-ldo2-voltage-range.patch
queue-5.4/regualtor-pfuze100-correct-sw1a-sw2-on-pfuze3000.patch
queue-5.4/arm64-dts-imx8mn-ddr4-evk-correct-ldo1-ldo2-voltage-range.patch
