MLK-21987-2 arm64: dts: imx8mn: Constrain CPU OPP for DDR4 EVK board

DDR4 EVK board is working at NOD mode, according to design, all
supplies MUST be in NOD mode, that means CPU frequency can ONLY
be 1.2GHz.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Bai Ping <ping.bai@nxp.com>

diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8mn-ddr4-evk.dts b/arch/arm64/boot/dts/freescale/fsl-imx8mn-ddr4-evk.dts
index 666af2a..d0323a1 100644 (file)
--- a/arch/arm64/boot/dts/freescale/fsl-imx8mn-ddr4-evk.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8mn-ddr4-evk.dts
@@ -907,6 +907,10 @@
 };
 
 &A53_0 {
+       operating-points = <
+               /* kHz    uV */
+               1200000 800000
+       >;
        arm-supply = <&buck2_reg>;
 };