2020-04-25 12:40:26

by Anson Huang

Subject: [PATCH] arm64: dts: imx8mn: Update VDD_ARM 1.2GHz setpoint voltage

The latest datasheet Rev. 0.1, 03/2020 removes below constrain:

"If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."

So, for 1.2GHz setpoint VDD_ARM can use its typical voltage
directly.

The datasheet can be downloaded from below link:
https://www.nxp.com/docs/en/data-sheet/IMX8MNCEC.pdf

Signed-off-by: Anson Huang <[email protected]>
---
arch/arm64/boot/dts/freescale/imx8mn.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index fa78f01..de6e2cf 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -121,7 +121,7 @@

opp-1200000000 {
opp-hz = /bits/ 64 <1200000000>;
- opp-microvolt = <950000>;
+ opp-microvolt = <850000>;
opp-supported-hw = <0xb00>, <0x7>;
clock-latency-ns = <150000>;
opp-suspend;
--
2.7.4

2020-04-29 03:41:24

by Shawn Guo

Subject: Re: [PATCH] arm64: dts: imx8mn: Update VDD_ARM 1.2GHz setpoint voltage

On Sat, Apr 25, 2020 at 08:29:50PM +0800, Anson Huang wrote:
> The latest datasheet Rev. 0.1, 03/2020 removes below constrain:
>
> "If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."
>
> So, for 1.2GHz setpoint VDD_ARM can use its typical voltage
> directly.
>
> The datasheet can be downloaded from below link:
> https://www.nxp.com/docs/en/data-sheet/IMX8MNCEC.pdf
>
> Signed-off-by: Anson Huang <[email protected]>

Applied, thanks.