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* [PATCH v2 1/2] arm64: dts: imx8mm-evk: correct ldo1/ldo2 voltage range
@ 2020-05-21 14:17 ` Robin Gong
  0 siblings, 0 replies; 12+ messages in thread
From: Robin Gong @ 2020-05-21 14:17 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer, festevam, anson.huang, peng.fan
  Cc: kernel, devicetree, linux-arm-kernel, linux-kernel, linux-imx

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(-)

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;
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2020-05-22  2:27 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-21 14:17 [PATCH v2 1/2] arm64: dts: imx8mm-evk: correct ldo1/ldo2 voltage range Robin Gong
2020-05-21 14:17 ` Robin Gong
2020-05-21 10:51 ` Aisheng Dong
2020-05-21 10:51   ` Aisheng Dong
2020-05-21 14:17 ` [PATCH v2 2/2] arm64: dts: imx8mn-ddr4-evk: " Robin Gong
2020-05-21 14:17   ` Robin Gong
2020-05-21 10:51   ` Aisheng Dong
2020-05-21 10:51     ` Aisheng Dong
2020-05-22  1:36   ` Fabio Estevam
2020-05-22  1:36     ` Fabio Estevam
2020-05-22  2:26     ` Robin Gong
2020-05-22  2:26       ` Robin Gong

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