[PATCH] ARM: dts: imx6ull-dhcor: Remove 900MHz operating point
Christoph Niedermaier
cniedermaier at dh-electronics.com
Thu Dec 21 08:46:33 PST 2023
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 at dh-electronics.com>
---
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Marek Vasut <marex at denx.de>
Cc: Fabio Estevam <festevam at denx.de>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: kernel at dh-electronics.com
Cc: devicetree at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
To: linux-arm-kernel at lists.infradead.org
---
arch/arm/boot/dts/nxp/imx/imx6ull-dhcor-som.dtsi | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
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 45315adfaa86..75486e1b0c15 100644
--- 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
--
2.11.0
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