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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Feb 18, 2020 at 09:52:32AM +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 > --- > arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts > index 2497eeb..7a61a1a 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts > +++ b/arch/arm64/boot/dts/freescale/imx8mn-ddr4-evk.dts > @@ -13,6 +13,12 @@ > compatible = "fsl,imx8mn-ddr4-evk", "fsl,imx8mn"; > }; > > +&a53_opp_table { > + opp-1200000000 { > + opp-microvolt = <950000>; > + }; > +}; > + The restriction applies to SoC rather than a particular board, right? If so, the change should be made in imx8mn.dtsi? Shawn > &A53_0 { > cpu-supply = <&buck2_reg>; > }; > -- > 2.7.4 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel