From: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
[ Upstream commit c486762fb17c99fd642beea3e1e4744d093c262a ]
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@xxxxxxxxxx>
Reviewed-by: Fabio Estevam <festevam@xxxxxxxxx>
Signed-off-by: Shawn Guo <shawnguo@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/arm/boot/dts/imx53-sk-imx53.dts | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/boot/dts/imx53-sk-imx53.dts b/arch/arm/boot/dts/imx53-sk-imx53.dts
index 103e73176e47d..1a00d290092ad 100644
--- a/arch/arm/boot/dts/imx53-sk-imx53.dts
+++ b/arch/arm/boot/dts/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>;
--
2.40.1
