2022-11-17 10:21:11

by Peng Fan (OSS)

Subject: [PATCH V6 07/12] arm64: dts: imx8mn-evk: update vdd_soc dvs voltage

From: Peng Fan <[email protected]>

Per schematic, BUCK1 is for VDD_SOC&DRAM&PU_0V9. The nxp,dvs-run-voltage
and nxp,dvs-standby-voltage need set for BUCK1, not BUCK2.
BUCK2 is for A53, which is handled by DVFS, so no need dvs property.
nxp,dvs-run-voltage is not needed, since bootloader must configure
voltage to make system boot well.

Signed-off-by: Peng Fan <[email protected]>
---
arch/arm64/boot/dts/freescale/imx8mn-evk.dts | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
index 4eb467df5ba7..4839a962a170 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
@@ -47,6 +47,7 @@ buck1: BUCK1{
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <3125>;
+ nxp,dvs-standby-voltage = <750000>;
};

buck2: BUCK2 {
@@ -56,8 +57,6 @@ buck2: BUCK2 {
regulator-boot-on;
regulator-always-on;
regulator-ramp-delay = <3125>;
- nxp,dvs-run-voltage = <950000>;
- nxp,dvs-standby-voltage = <850000>;
};

buck4: BUCK4{
--
2.37.1

2022-11-17 11:08:57

by Marco Felsch

Subject: Re: [PATCH V6 07/12] arm64: dts: imx8mn-evk: update vdd_soc dvs voltage

On 22-11-17, Peng Fan (OSS) wrote:
> From: Peng Fan <[email protected]>
>
> Per schematic, BUCK1 is for VDD_SOC&DRAM&PU_0V9. The nxp,dvs-run-voltage
> and nxp,dvs-standby-voltage need set for BUCK1, not BUCK2.
> BUCK2 is for A53, which is handled by DVFS, so no need dvs property.
> nxp,dvs-run-voltage is not needed, since bootloader must configure
> voltage to make system boot well.
>
> Signed-off-by: Peng Fan <[email protected]>

Acked-by: Marco Felsch <[email protected]>

> ---
> arch/arm64/boot/dts/freescale/imx8mn-evk.dts | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
> index 4eb467df5ba7..4839a962a170 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
> @@ -47,6 +47,7 @@ buck1: BUCK1{
> regulator-boot-on;
> regulator-always-on;
> regulator-ramp-delay = <3125>;
> + nxp,dvs-standby-voltage = <750000>;
> };
>
> buck2: BUCK2 {
> @@ -56,8 +57,6 @@ buck2: BUCK2 {
> regulator-boot-on;
> regulator-always-on;
> regulator-ramp-delay = <3125>;
> - nxp,dvs-run-voltage = <950000>;
> - nxp,dvs-standby-voltage = <850000>;
> };
>
> buck4: BUCK4{
> --
> 2.37.1
>
>
>

2022-11-19 03:25:40

by Shawn Guo

Subject: Re: [PATCH V6 07/12] arm64: dts: imx8mn-evk: update vdd_soc dvs voltage

On Thu, Nov 17, 2022 at 05:53:58PM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <[email protected]>
>
> Per schematic, BUCK1 is for VDD_SOC&DRAM&PU_0V9. The nxp,dvs-run-voltage
> and nxp,dvs-standby-voltage need set for BUCK1, not BUCK2.
> BUCK2 is for A53, which is handled by DVFS, so no need dvs property.
> nxp,dvs-run-voltage is not needed, since bootloader must configure
> voltage to make system boot well.
>
> Signed-off-by: Peng Fan <[email protected]>

Applied, thanks!