From: Dmitry Baryshkov dmitry.baryshkov@linaro.org
[ 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@linaro.org Reviewed-by: Fabio Estevam festevam@gmail.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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>;