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From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
shawnguo@kernel.org, s.hauer@pengutronix.de
Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
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linux-arm-kernel@lists.infradead.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH V2 03/15] arm64: dts: imx8mp-evk: fix BUCK/LDO voltage
Date: Mon, 24 Oct 2022 11:13:39 +0800
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arm64: dts: imx8m-evk: misc dts update
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Commit Message
Peng Fan (OSS)
Oct. 24, 2022, 3:13 a.m. UTC
From: Peng Fan <peng.fan@nxp.com> Per PCA9450C datasheet, the voltage range as below: BUCK1 0.6 - 2.1875 BUCK2 0.6 - 2.1875 BUCK4 0.6 - 3.4 BUCK5 0.6 - 3.4 BUCK6 0.6 - 3.4 LDO1 1.6-1.9, 3.0-3.3 LDO2 0.8 – 1.15 LDO3 0.8 - 3.3 LDO4 0.8 - 3.3 LDO5 1.8 - 3.3 Currently we set the board voltage range same as PMIC regulator range. Also add LDO[2,4] in this patch Fixes: 5497bc2a2bff ("arm64: dts: imx8mp-evk: Add PMIC device") Signed-off-by: Peng Fan <peng.fan@nxp.com> --- arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 44 +++++++++++++------- 1 file changed, 30 insertions(+), 14 deletions(-)
Comments
On 22-10-24, Peng Fan (OSS) wrote: > From: Peng Fan <peng.fan@nxp.com> > > Per PCA9450C datasheet, the voltage range as below: > BUCK1 0.6 - 2.1875 > BUCK2 0.6 - 2.1875 > BUCK4 0.6 - 3.4 > BUCK5 0.6 - 3.4 > BUCK6 0.6 - 3.4 > > LDO1 1.6-1.9, 3.0-3.3 > LDO2 0.8 – 1.15 > LDO3 0.8 - 3.3 > LDO4 0.8 - 3.3 > LDO5 1.8 - 3.3 > > Currently we set the board voltage range same as PMIC regulator > range. We did not therefore you aligned it. Also are you sure that this will not damage the boards since you're lowering the min-voltage and raising the max. voltage? According the schematic, BUCK1 is for VDD_SOC which is min. 0.805V and max. 1.0V. After you're change someone could set it to 2.1875V. Same applies to BUCK2 which is for VDD_ARM and should be within min. 0.805V and max. 1.05V. Regards, Marco > Also add LDO[2,4] in this patch > > Fixes: 5497bc2a2bff ("arm64: dts: imx8mp-evk: Add PMIC device") > Signed-off-by: Peng Fan <peng.fan@nxp.com> > --- > arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 44 +++++++++++++------- > 1 file changed, 30 insertions(+), 14 deletions(-) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts > index b4c1ef2559f2..a4cddc5a8620 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts > @@ -248,8 +248,8 @@ pmic@25 { > regulators { > BUCK1 { > regulator-name = "BUCK1"; > - regulator-min-microvolt = <720000>; > - regulator-max-microvolt = <1000000>; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <2187500>; > regulator-boot-on; > regulator-always-on; > regulator-ramp-delay = <3125>; > @@ -257,8 +257,8 @@ BUCK1 { > > reg_arm: BUCK2 { > regulator-name = "BUCK2"; > - regulator-min-microvolt = <720000>; > - regulator-max-microvolt = <1025000>; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <2187500>; > regulator-boot-on; > regulator-always-on; > regulator-ramp-delay = <3125>; > @@ -268,40 +268,56 @@ reg_arm: BUCK2 { > > BUCK4 { > regulator-name = "BUCK4"; > - regulator-min-microvolt = <3000000>; > - regulator-max-microvolt = <3600000>; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <3400000>; > regulator-boot-on; > regulator-always-on; > }; > > BUCK5 { > regulator-name = "BUCK5"; > - regulator-min-microvolt = <1650000>; > - regulator-max-microvolt = <1950000>; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <3400000>; > regulator-boot-on; > regulator-always-on; > }; > > BUCK6 { > regulator-name = "BUCK6"; > - regulator-min-microvolt = <1045000>; > - regulator-max-microvolt = <1155000>; > + regulator-min-microvolt = <600000>; > + regulator-max-microvolt = <3400000>; > regulator-boot-on; > regulator-always-on; > }; > > LDO1 { > regulator-name = "LDO1"; > - regulator-min-microvolt = <1650000>; > - regulator-max-microvolt = <1950000>; > + regulator-min-microvolt = <1600000>; > + regulator-max-microvolt = <3300000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + > + LDO2 { > + regulator-name = "LDO2"; > + regulator-min-microvolt = <800000>; > + regulator-max-microvolt = <1150000>; > regulator-boot-on; > regulator-always-on; > }; > > LDO3 { > regulator-name = "LDO3"; > - regulator-min-microvolt = <1710000>; > - regulator-max-microvolt = <1890000>; > + regulator-min-microvolt = <800000>; > + regulator-max-microvolt = <3300000>; > + regulator-boot-on; > + regulator-always-on; > + }; > + > + ldo4: LDO4 { > + regulator-name = "LDO4"; > + regulator-min-microvolt = <800000>; > + regulator-max-microvolt = <3300000>; > regulator-boot-on; > regulator-always-on; > }; > -- > 2.37.1 > > >
On 10/28/2022 10:53 PM, Marco Felsch wrote: > On 22-10-24, Peng Fan (OSS) wrote: >> From: Peng Fan <peng.fan@nxp.com> >> >> Per PCA9450C datasheet, the voltage range as below: >> BUCK1 0.6 - 2.1875 >> BUCK2 0.6 - 2.1875 >> BUCK4 0.6 - 3.4 >> BUCK5 0.6 - 3.4 >> BUCK6 0.6 - 3.4 >> >> LDO1 1.6-1.9, 3.0-3.3 >> LDO2 0.8 – 1.15 >> LDO3 0.8 - 3.3 >> LDO4 0.8 - 3.3 >> LDO5 1.8 - 3.3 >> >> Currently we set the board voltage range same as PMIC regulator >> range. > > We did not therefore you aligned it. Also are you sure that this will > not damage the boards since you're lowering the min-voltage and raising > the max. voltage? According the schematic, BUCK1 is for VDD_SOC which is > min. 0.805V and max. 1.0V. After you're change someone could set it to > 2.1875V. Same applies to BUCK2 which is for VDD_ARM and should be within > min. 0.805V and max. 1.05V. You are right. But I think DVFS already limit it. I am not sure very sure, let me drop this patch for now. I need confirm with HW team. Thanks, Peng. > > Regards, > Marco > >> Also add LDO[2,4] in this patch >> >> Fixes: 5497bc2a2bff ("arm64: dts: imx8mp-evk: Add PMIC device") >> Signed-off-by: Peng Fan <peng.fan@nxp.com> >> --- >> arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 44 +++++++++++++------- >> 1 file changed, 30 insertions(+), 14 deletions(-) >> >> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts >> index b4c1ef2559f2..a4cddc5a8620 100644 >> --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts >> +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts >> @@ -248,8 +248,8 @@ pmic@25 { >> regulators { >> BUCK1 { >> regulator-name = "BUCK1"; >> - regulator-min-microvolt = <720000>; >> - regulator-max-microvolt = <1000000>; >> + regulator-min-microvolt = <600000>; >> + regulator-max-microvolt = <2187500>; >> regulator-boot-on; >> regulator-always-on; >> regulator-ramp-delay = <3125>; >> @@ -257,8 +257,8 @@ BUCK1 { >> >> reg_arm: BUCK2 { >> regulator-name = "BUCK2"; >> - regulator-min-microvolt = <720000>; >> - regulator-max-microvolt = <1025000>; >> + regulator-min-microvolt = <600000>; >> + regulator-max-microvolt = <2187500>; >> regulator-boot-on; >> regulator-always-on; >> regulator-ramp-delay = <3125>; >> @@ -268,40 +268,56 @@ reg_arm: BUCK2 { >> >> BUCK4 { >> regulator-name = "BUCK4"; >> - regulator-min-microvolt = <3000000>; >> - regulator-max-microvolt = <3600000>; >> + regulator-min-microvolt = <600000>; >> + regulator-max-microvolt = <3400000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> >> BUCK5 { >> regulator-name = "BUCK5"; >> - regulator-min-microvolt = <1650000>; >> - regulator-max-microvolt = <1950000>; >> + regulator-min-microvolt = <600000>; >> + regulator-max-microvolt = <3400000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> >> BUCK6 { >> regulator-name = "BUCK6"; >> - regulator-min-microvolt = <1045000>; >> - regulator-max-microvolt = <1155000>; >> + regulator-min-microvolt = <600000>; >> + regulator-max-microvolt = <3400000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> >> LDO1 { >> regulator-name = "LDO1"; >> - regulator-min-microvolt = <1650000>; >> - regulator-max-microvolt = <1950000>; >> + regulator-min-microvolt = <1600000>; >> + regulator-max-microvolt = <3300000>; >> + regulator-boot-on; >> + regulator-always-on; >> + }; >> + >> + LDO2 { >> + regulator-name = "LDO2"; >> + regulator-min-microvolt = <800000>; >> + regulator-max-microvolt = <1150000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> >> LDO3 { >> regulator-name = "LDO3"; >> - regulator-min-microvolt = <1710000>; >> - regulator-max-microvolt = <1890000>; >> + regulator-min-microvolt = <800000>; >> + regulator-max-microvolt = <3300000>; >> + regulator-boot-on; >> + regulator-always-on; >> + }; >> + >> + ldo4: LDO4 { >> + regulator-name = "LDO4"; >> + regulator-min-microvolt = <800000>; >> + regulator-max-microvolt = <3300000>; >> regulator-boot-on; >> regulator-always-on; >> }; >> -- >> 2.37.1 >> >> >>
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts index b4c1ef2559f2..a4cddc5a8620 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts +++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts @@ -248,8 +248,8 @@ pmic@25 { regulators { BUCK1 { regulator-name = "BUCK1"; - regulator-min-microvolt = <720000>; - regulator-max-microvolt = <1000000>; + regulator-min-microvolt = <600000>; + regulator-max-microvolt = <2187500>; regulator-boot-on; regulator-always-on; regulator-ramp-delay = <3125>; @@ -257,8 +257,8 @@ BUCK1 { reg_arm: BUCK2 { regulator-name = "BUCK2"; - regulator-min-microvolt = <720000>; - regulator-max-microvolt = <1025000>; + regulator-min-microvolt = <600000>; + regulator-max-microvolt = <2187500>; regulator-boot-on; regulator-always-on; regulator-ramp-delay = <3125>; @@ -268,40 +268,56 @@ reg_arm: BUCK2 { BUCK4 { regulator-name = "BUCK4"; - regulator-min-microvolt = <3000000>; - regulator-max-microvolt = <3600000>; + regulator-min-microvolt = <600000>; + regulator-max-microvolt = <3400000>; regulator-boot-on; regulator-always-on; }; BUCK5 { regulator-name = "BUCK5"; - regulator-min-microvolt = <1650000>; - regulator-max-microvolt = <1950000>; + regulator-min-microvolt = <600000>; + regulator-max-microvolt = <3400000>; regulator-boot-on; regulator-always-on; }; BUCK6 { regulator-name = "BUCK6"; - regulator-min-microvolt = <1045000>; - regulator-max-microvolt = <1155000>; + regulator-min-microvolt = <600000>; + regulator-max-microvolt = <3400000>; regulator-boot-on; regulator-always-on; }; LDO1 { regulator-name = "LDO1"; - regulator-min-microvolt = <1650000>; - regulator-max-microvolt = <1950000>; + regulator-min-microvolt = <1600000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + regulator-always-on; + }; + + LDO2 { + regulator-name = "LDO2"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <1150000>; regulator-boot-on; regulator-always-on; }; LDO3 { regulator-name = "LDO3"; - regulator-min-microvolt = <1710000>; - regulator-max-microvolt = <1890000>; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + regulator-always-on; + }; + + ldo4: LDO4 { + regulator-name = "LDO4"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <3300000>; regulator-boot-on; regulator-always-on; };