* [PATCH] arm64: dts: imx8mn: Update VDD_ARM 1.2GHz setpoint voltage
@ 2020-04-25 12:29 Anson Huang
2020-04-29 3:39 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Anson Huang @ 2020-04-25 12:29 UTC (permalink / raw)
To: robh+dt, shawnguo, s.hauer, kernel, festevam, leonard.crestez,
horia.geanta, peng.fan, devicetree, linux-arm-kernel,
linux-kernel
Cc: Linux-imx
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 <Anson.Huang@nxp.com>
---
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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: dts: imx8mn: Update VDD_ARM 1.2GHz setpoint voltage
2020-04-25 12:29 [PATCH] arm64: dts: imx8mn: Update VDD_ARM 1.2GHz setpoint voltage Anson Huang
@ 2020-04-29 3:39 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2020-04-29 3:39 UTC (permalink / raw)
To: Anson Huang
Cc: robh+dt, s.hauer, kernel, festevam, leonard.crestez,
horia.geanta, peng.fan, devicetree, linux-arm-kernel,
linux-kernel, Linux-imx
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 <Anson.Huang@nxp.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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