diff mbox series

[v2,1/2] arm64: dts: imx8mm-evk: correct ldo1/ldo2 voltage range

Message ID 1590070674-23027-1-git-send-email-yibin.gong@nxp.com
State Mainlined
Commit 4fd6b5735c03c0955d93960d31f17d7144f5578f
Headers show
Series [v2,1/2] arm64: dts: imx8mm-evk: correct ldo1/ldo2 voltage range | expand

Commit Message

Robin Gong May 21, 2020, 2:17 p.m. UTC
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.mx8mm
datasheet as the below warning log in kernel:

[    0.995524] LDO1: Bringing 1800000uV into 3000000-3000000uV
[    0.999196] LDO2: Bringing 800000uV into 900000-900000uV

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Aisheng Dong May 21, 2020, 10:51 a.m. UTC | #1
> From: Robin Gong <yibin.gong@nxp.com>
> Sent: Thursday, May 21, 2020 10:18 PM
> 
> 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.mx8mm
> datasheet as the below warning log in kernel:
> 
> [    0.995524] LDO1: Bringing 1800000uV into 3000000-3000000uV
> [    0.999196] LDO2: Bringing 800000uV into 900000-900000uV
> 
> Signed-off-by: Robin Gong <yibin.gong@nxp.com>

Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>

Regards
Aisheng
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
index e5ec832..0f1d7f8 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
@@ -208,7 +208,7 @@ 
 
 			ldo1_reg: LDO1 {
 				regulator-name = "LDO1";
-				regulator-min-microvolt = <3000000>;
+				regulator-min-microvolt = <1600000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-boot-on;
 				regulator-always-on;
@@ -216,7 +216,7 @@ 
 
 			ldo2_reg: LDO2 {
 				regulator-name = "LDO2";
-				regulator-min-microvolt = <900000>;
+				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <900000>;
 				regulator-boot-on;
 				regulator-always-on;