From: Robin Gong <yibin.gong@nxp.com>
To: robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
festevam@gmail.com, anson.huang@nxp.com, peng.fan@nxp.com
Cc: kernel@pengutronix.de, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-imx@nxp.com
Subject: [PATCH v2 2/2] arm64: dts: imx8mn-ddr4-evk: correct ldo1/ldo2 voltage range
Date: Thu, 21 May 2020 22:17:54 +0800 [thread overview]
Message-ID: <1590070674-23027-2-git-send-email-yibin.gong@nxp.com> (raw)
In-Reply-To: <1590070674-23027-1-git-send-email-yibin.gong@nxp.com>
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
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
index d07e0e6..a1e5483 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
@@ -113,7 +113,7 @@
ldo1_reg: LDO1 {
regulator-name = "LDO1";
- regulator-min-microvolt = <3000000>;
+ regulator-min-microvolt = <1600000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
@@ -121,7 +121,7 @@
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
WARNING: multiple messages have this Message-ID (diff)
From: Robin Gong <yibin.gong@nxp.com>
To: robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
festevam@gmail.com, anson.huang@nxp.com, peng.fan@nxp.com
Cc: devicetree@vger.kernel.org, linux-imx@nxp.com,
linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/2] arm64: dts: imx8mn-ddr4-evk: correct ldo1/ldo2 voltage range
Date: Thu, 21 May 2020 22:17:54 +0800 [thread overview]
Message-ID: <1590070674-23027-2-git-send-email-yibin.gong@nxp.com> (raw)
In-Reply-To: <1590070674-23027-1-git-send-email-yibin.gong@nxp.com>
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
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
index d07e0e6..a1e5483 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts
@@ -113,7 +113,7 @@
ldo1_reg: LDO1 {
regulator-name = "LDO1";
- regulator-min-microvolt = <3000000>;
+ regulator-min-microvolt = <1600000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
@@ -121,7 +121,7 @@
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
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next prev parent reply other threads:[~2020-05-21 6:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
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 ` Robin Gong [this message]
2020-05-21 14:17 ` [PATCH v2 2/2] arm64: dts: imx8mn-ddr4-evk: " 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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