ARM: dts: imx6ull-dhcor: Remove 900MHz operating point

Due to CPU lifetime consideration of the SoC manufacturer [1] and
the preferred area of operation in the industrial related
environment, set the maximum frequency for each DHCOM i.MX6ULL to
792MHz, as with the industrial type. This is done by removing the
operating point at 900MHz and set the clock-frequency to 792000000.

[1] https://www.nxp.com/docs/en/application-note/AN5337.pdf

Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-som.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-som.dtsi
index 45315adfaa86ffad824e3693a1308e689057e5ae..75486e1b0c15f53ff10449603f15f128c775a8b6 100644 (file)
--- a/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-som.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-som.dtsi
@@ -28,10 +28,14 @@
        /*
         * Due to the design as a solderable SOM, there are no capacitors
         * below the SoC, therefore higher voltages are required.
+        * Due to CPU lifetime consideration of the SoC manufacturer and
+        * the preferred area of operation in the industrial related
+        * environment, set the maximum frequency for each DHCOM i.MX6ULL
+        * to 792MHz, as with the industrial type.
         */
+       clock-frequency = <792000000>;
        operating-points = <
                /* kHz  uV */
-               900000  1275000
                792000  1250000 /* Voltage increased */
                528000  1175000
                396000  1025000
@@ -39,7 +43,6 @@
        >;
        fsl,soc-operating-points = <
                /* KHz  uV */
-               900000  1250000
                792000  1250000 /* Voltage increased */
                528000  1175000
                396000  1175000