From: Adam Ford Date: Fri, 20 Jun 2025 21:34:45 +0000 (-0500) Subject: arm64: dts: imx8mm-beacon: Fix HS400 USDHC clock speed X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f83f69097a302ed2a2775975ddcf12e6a5ac6ec3;p=thirdparty%2Fkernel%2Fstable.git arm64: dts: imx8mm-beacon: Fix HS400 USDHC clock speed The reference manual for the i.MX8MM states the clock rate in MMC mode is 1/2 of the input clock, therefore to properly run at HS400 rates, the input clock must be 400MHz to operate at 200MHz. Currently the clock is set to 200MHz which is half the rate it should be, so the throughput is half of what it should be for HS400 operation. Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit") Signed-off-by: Adam Ford Reviewed-by: Fabio Estevam Signed-off-by: Shawn Guo --- diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi index 21bcd82fd092..8287a7f66ed3 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi @@ -294,6 +294,8 @@ pinctrl-0 = <&pinctrl_usdhc3>; pinctrl-1 = <&pinctrl_usdhc3_100mhz>; pinctrl-2 = <&pinctrl_usdhc3_200mhz>; + assigned-clocks = <&clk IMX8MM_CLK_USDHC3>; + assigned-clock-rates = <400000000>; bus-width = <8>; non-removable; status = "okay";