| Message ID | 20230709203019.291823-1-dmitry.baryshkov@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] ARM: dts: nxp/imx: limit sk-imx53 supported frequencies | expand |
On Sun, Jul 9, 2023 at 5:30 PM Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote: > > 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>
On Sun, Jul 09, 2023 at 11:30:19PM +0300, Dmitry Baryshkov wrote: > 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> Applied, thanks!
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 6ea103a49697..3d9f14f32efd 100644 --- a/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts +++ b/arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts @@ -77,6 +77,16 @@ &can1 { 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>;
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> --- Changes since v1: - After additional consideration, also disable the 1 GHz frequency. The datasheets are clear the the SoC is not required to support this frequency (Fabio). --- arch/arm/boot/dts/nxp/imx/imx53-sk-imx53.dts | 10 ++++++++++ 1 file changed, 10 insertions(+)