arm64: dts: imx8mp: Set SPI NOR to max 40 MHz on Data Modul i.MX8M Plus eDM SBC

The SPI NOR bus routing on this board cannot go above 50 MHz,
set the clock frequency to maximum of 40 MHz to be within a
safe margin. Remove the comment as well.

Fixes: 562d222f23f0 ("arm64: dts: imx8mp: Add support for Data Modul i.MX8M Plus eDM SBC")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts
index 43ca2ae5eaa672de67b809eb67b70230dff085aa..852ba62d0696d64f0fbc34741df14fe68007bd8d 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-data-modul-edm-sbc.dts
@@ -153,7 +153,7 @@
        flash@0 {       /* W25Q128JVEI */
                compatible = "jedec,spi-nor";
                reg = <0>;
-               spi-max-frequency = <100000000>;        /* Up to 133 MHz */
+               spi-max-frequency = <40000000>;
                spi-tx-bus-width = <1>;
                spi-rx-bus-width = <1>;
        };