* [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode
@ 2020-02-24 2:07 ` Anson Huang
0 siblings, 0 replies; 4+ messages in thread
From: Anson Huang @ 2020-02-24 2:07 UTC (permalink / raw)
To: robh+dt, mark.rutland, shawnguo, s.hauer, kernel, festevam,
leonard.crestez, daniel.baluta, horia.geanta, peng.fan,
devicetree, linux-arm-kernel, linux-kernel
Cc: Linux-imx
According to latest datasheet Rev.0, 10/2019, there is restriction
as below:
"If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."
As by default SoC is running at OD mode(VDD_SOC = 0.95V), so
VDD_ARM 1.2GHz OPP's voltage should be increased to 0.95V.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
Changes since V1:
- Move the OPP change from board dts for soc dtsi.
---
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 c98a376..f277572 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -116,7 +116,7 @@
opp-1200000000 {
opp-hz = /bits/ 64 <1200000000>;
- opp-microvolt = <850000>;
+ opp-microvolt = <950000>;
opp-supported-hw = <0xb00>, <0x7>;
clock-latency-ns = <150000>;
opp-suspend;
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode
@ 2020-02-24 2:07 ` Anson Huang
0 siblings, 0 replies; 4+ messages in thread
From: Anson Huang @ 2020-02-24 2:07 UTC (permalink / raw)
To: robh+dt, mark.rutland, shawnguo, s.hauer, kernel, festevam,
leonard.crestez, daniel.baluta, horia.geanta, peng.fan,
devicetree, linux-arm-kernel, linux-kernel
Cc: Linux-imx
According to latest datasheet Rev.0, 10/2019, there is restriction
as below:
"If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."
As by default SoC is running at OD mode(VDD_SOC = 0.95V), so
VDD_ARM 1.2GHz OPP's voltage should be increased to 0.95V.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
Changes since V1:
- Move the OPP change from board dts for soc dtsi.
---
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 c98a376..f277572 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -116,7 +116,7 @@
opp-1200000000 {
opp-hz = /bits/ 64 <1200000000>;
- opp-microvolt = <850000>;
+ opp-microvolt = <950000>;
opp-supported-hw = <0xb00>, <0x7>;
clock-latency-ns = <150000>;
opp-suspend;
--
2.7.4
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode
2020-02-24 2:07 ` Anson Huang
@ 2020-02-24 7:51 ` Shawn Guo
-1 siblings, 0 replies; 4+ messages in thread
From: Shawn Guo @ 2020-02-24 7:51 UTC (permalink / raw)
To: Anson Huang
Cc: robh+dt, mark.rutland, s.hauer, kernel, festevam,
leonard.crestez, daniel.baluta, horia.geanta, peng.fan,
devicetree, linux-arm-kernel, linux-kernel, Linux-imx
On Mon, Feb 24, 2020 at 10:07:40AM +0800, Anson Huang wrote:
> According to latest datasheet Rev.0, 10/2019, there is restriction
> as below:
>
> "If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."
>
> As by default SoC is running at OD mode(VDD_SOC = 0.95V), so
> VDD_ARM 1.2GHz OPP's voltage should be increased to 0.95V.
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode
@ 2020-02-24 7:51 ` Shawn Guo
0 siblings, 0 replies; 4+ messages in thread
From: Shawn Guo @ 2020-02-24 7:51 UTC (permalink / raw)
To: Anson Huang
Cc: mark.rutland, devicetree, peng.fan, horia.geanta, daniel.baluta,
s.hauer, linux-kernel, robh+dt, Linux-imx, kernel,
leonard.crestez, festevam, linux-arm-kernel
On Mon, Feb 24, 2020 at 10:07:40AM +0800, Anson Huang wrote:
> According to latest datasheet Rev.0, 10/2019, there is restriction
> as below:
>
> "If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."
>
> As by default SoC is running at OD mode(VDD_SOC = 0.95V), so
> VDD_ARM 1.2GHz OPP's voltage should be increased to 0.95V.
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Applied, thanks.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-02-24 7:51 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-02-24 2:07 [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode Anson Huang
2020-02-24 2:07 ` Anson Huang
2020-02-24 7:51 ` Shawn Guo
2020-02-24 7:51 ` Shawn Guo
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