linux-kernel - [PATCH 2/8] arm64: dts: imx8qm-mek: assign double SD bus frequency for usdhc1

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Message-Id: <20251028-b4_qm_dts-v1-2-51ba94389c1f@nxp.com>
Date: Tue, 28 Oct 2025 16:30:43 -0400
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH 2/8] arm64: dts: imx8qm-mek: assign double SD bus frequency
 for usdhc1

Assign double SD bus frequency to support SDR104 mode, where the operating
clock runs at 208 MHz.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
index 6f1c78fcf384a7691f7f8ea1b50ab21cd6e72ba1..44b8e9c75c59aa31cf9dd04c3d03be047ef82ff9 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts
@@ -800,6 +800,8 @@ &pwm_lvds1 {
 };
 
 &usdhc1 {
+	assigned-clocks = <&clk IMX_SC_R_SDHC_0 IMX_SC_PM_CLK_PER>;
+	assigned-clock-rates = <400000000>;
 	pinctrl-names = "default", "state_100mhz", "state_200mhz";
 	pinctrl-0 = <&pinctrl_usdhc1>;
 	pinctrl-1 = <&pinctrl_usdhc1>;

-- 
2.34.1