ARM: dts: nxp/imx: limit sk-imx53 supported frequencies

The SK-IMX53 board, bearing i.MX536A CPU, is not stable when running at
1.2 GHz (default iMX53 maximum). The SoC is only rated up to 800 MHz.
Disable 1.2 GHz and 1 GHz frequencies.

Fixes: 0b8576d8440a ("ARM: dts: imx: Add support for SK-iMX53 board")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts b/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts
index 103e73176e47d643d77cb37c230261b2a0752d48..1a00d290092ad447d45d5e0cb5117183c4bc3dfe 100644 (file)
--- a/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts
+++ b/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts
@@ -60,6 +60,16 @@
        status = "okay";
 };
 
+&cpu0 {
+       /* CPU rated to 800 MHz, not the default 1.2GHz. */
+       operating-points = <
+               /* kHz   uV */
+               166666  850000
+               400000  900000
+               800000  1050000
+       >;
+};
+
 &ecspi1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_ecspi1>;