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JiafeiPankartben
JiafeiPan
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boards: imx93_evk: enable SDHC on the board
Added pinctrl and dts nodes for uSDHC1 and uSDHC2, they are disabled by default, and provided overlay files to enable them if needed. Signed-off-by: Jiafei Pan <[email protected]> Signed-off-by: Lei Xu <[email protected]>
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‎boards/nxp/imx93_evk/Kconfig.defconfig

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@@ -67,4 +67,11 @@ endif # NETWORKING
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endif # BOARD_IMX93_EVK_MIMX9352_A55
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if IMX_USDHC
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config GPIO
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default y
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endif # IMX_USDHC
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endif # BOARD_IMX93_EVK

‎boards/nxp/imx93_evk/doc/index.rst

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@@ -62,6 +62,37 @@ Serial Port
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This board configuration uses a single serial communication channel with the
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CPU's UART2 for A55 core and M33 core.
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uSDHC (SD or eMMC Interface on A55)
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-----------------------------------
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i.MX 93 processor has three ultra secured digital host controller (uSDHC) modules
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for SD/eMMC interface support. On the MCIMX93-EVK board, the uSDHC2 interface of
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the processor connects to the MicroSD card slot (J1002), and uSDHC1 interface connects
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to the eMMC memory (located at the SOM board). DTS overlay file "usdhc1.overlay" and
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"usdhc2.overlay" are provided to enable specified the uSDHC controller.
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Currently it rely on U-boot or Linux to boot Zephyr on Cortex-A Core, so Zephyr need
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to use different uSDHC controller from U-boot or Linux to avoid resource conflict.
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For example, if EVK board boots from SD Card which uses uSDHC2, Zephyr can use MMC
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which uses uSDHC1 for testing:
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.. zephyr-app-commands::
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:zephyr-app: tests/subsys/sd/mmc
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:host-os: unix
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:board: imx93_evk/mimx9352/a55
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:goals: build
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:gen-args: -DEXTRA_DTC_OVERLAY_FILE=usdhc1.overlay
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And if EVK board boots from MMC which uses uSDHC1, Zephyr can use SD Card which uses
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uSDHC2 for testing:
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.. zephyr-app-commands::
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:zephyr-app: tests/subsys/sd/sdmmc
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:host-os: unix
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:board: imx93_evk/mimx9352/a55
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:goals: build
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:gen-args: -DEXTRA_DTC_OVERLAY_FILE=usdhc2.overlay
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Board MUX Control
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-----------------
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‎boards/nxp/imx93_evk/dts/usdhc1.overlay

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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aliases {
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sdhc0 = &usdhc1;
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};
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};
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&usdhc1 {
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status = "okay";
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sdmmc {
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status = "okay";
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};
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};

‎boards/nxp/imx93_evk/dts/usdhc2.overlay

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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aliases {
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sdhc0 = &usdhc2;
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};
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};
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&usdhc2 {
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status = "okay";
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sdmmc {
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status = "okay";
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};
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};

‎boards/nxp/imx93_evk/imx93_evk-pinctrl.dtsi

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};
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pinmux_usdhc1: pinmux_usdhc1 {
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group0 {
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pinmux = <&iomuxc1_sd1_clk_usdhc_clk_usdhc1_clk>,
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<&iomuxc1_sd1_strobe_usdhc_strobe_usdhc1_strobe>;
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drive-strength = "x1";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd1_cmd_usdhc_cmd_usdhc1_cmd>,
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<&iomuxc1_sd1_data0_usdhc_data_usdhc1_data0>,
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<&iomuxc1_sd1_data1_usdhc_data_usdhc1_data1>,
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<&iomuxc1_sd1_data2_usdhc_data_usdhc1_data2>,
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<&iomuxc1_sd1_data3_usdhc_data_usdhc1_data3>,
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<&iomuxc1_sd1_data4_usdhc_data_usdhc1_data4>,
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<&iomuxc1_sd1_data5_usdhc_data_usdhc1_data5>,
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<&iomuxc1_sd1_data6_usdhc_data_usdhc1_data6>,
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<&iomuxc1_sd1_data7_usdhc_data_usdhc1_data7>;
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drive-strength = "x1";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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};
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pinmux_usdhc1_100mhz: pinmux_usdhc1_100mhz {
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group0 {
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pinmux = <&iomuxc1_sd1_clk_usdhc_clk_usdhc1_clk>,
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<&iomuxc1_sd1_strobe_usdhc_strobe_usdhc1_strobe>;
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drive-strength = "x3";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd1_cmd_usdhc_cmd_usdhc1_cmd>,
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<&iomuxc1_sd1_data0_usdhc_data_usdhc1_data0>,
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<&iomuxc1_sd1_data1_usdhc_data_usdhc1_data1>,
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<&iomuxc1_sd1_data2_usdhc_data_usdhc1_data2>,
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<&iomuxc1_sd1_data3_usdhc_data_usdhc1_data3>,
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<&iomuxc1_sd1_data4_usdhc_data_usdhc1_data4>,
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<&iomuxc1_sd1_data5_usdhc_data_usdhc1_data5>,
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<&iomuxc1_sd1_data6_usdhc_data_usdhc1_data6>,
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<&iomuxc1_sd1_data7_usdhc_data_usdhc1_data7>;
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drive-strength = "x3";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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};
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pinmux_usdhc1_200mhz: pinmux_usdhc1_200mhz {
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group0 {
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pinmux = <&iomuxc1_sd1_clk_usdhc_clk_usdhc1_clk>,
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<&iomuxc1_sd1_strobe_usdhc_strobe_usdhc1_strobe>;
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drive-strength = "x6";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd1_cmd_usdhc_cmd_usdhc1_cmd>,
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<&iomuxc1_sd1_data0_usdhc_data_usdhc1_data0>,
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<&iomuxc1_sd1_data1_usdhc_data_usdhc1_data1>,
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<&iomuxc1_sd1_data2_usdhc_data_usdhc1_data2>,
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<&iomuxc1_sd1_data3_usdhc_data_usdhc1_data3>,
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<&iomuxc1_sd1_data4_usdhc_data_usdhc1_data4>,
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<&iomuxc1_sd1_data5_usdhc_data_usdhc1_data5>,
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<&iomuxc1_sd1_data6_usdhc_data_usdhc1_data6>,
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<&iomuxc1_sd1_data7_usdhc_data_usdhc1_data7>;
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drive-strength = "x6";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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};
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pinmux_usdhc2: pinmux_usdhc2 {
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group0 {
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pinmux = <&iomuxc1_sd2_clk_usdhc_clk_usdhc2_clk>;
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drive-strength = "x1";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd2_cmd_usdhc_cmd_usdhc2_cmd>,
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<&iomuxc1_sd2_data0_usdhc_data_usdhc2_data0>,
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<&iomuxc1_sd2_data1_usdhc_data_usdhc2_data1>,
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<&iomuxc1_sd2_data2_usdhc_data_usdhc2_data2>,
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<&iomuxc1_sd2_data3_usdhc_data_usdhc2_data3>;
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drive-strength = "x1";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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group2 {
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pinmux = <&iomuxc1_sd2_vselect_usdhc_vselect_usdhc2_vselect>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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};
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group3 {
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pinmux = <&iomuxc1_sd2_cd_b_gpio_io_gpio3_io00>,
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<&iomuxc1_sd2_reset_b_gpio_io_gpio3_io07>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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bias-pull-up;
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};
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};
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pinmux_usdhc2_100mhz: pinmux_usdhc2_100mhz {
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group0 {
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pinmux = <&iomuxc1_sd2_clk_usdhc_clk_usdhc2_clk>;
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drive-strength = "x3";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd2_cmd_usdhc_cmd_usdhc2_cmd>,
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<&iomuxc1_sd2_data0_usdhc_data_usdhc2_data0>,
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<&iomuxc1_sd2_data1_usdhc_data_usdhc2_data1>,
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<&iomuxc1_sd2_data2_usdhc_data_usdhc2_data2>,
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<&iomuxc1_sd2_data3_usdhc_data_usdhc2_data3>;
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drive-strength = "x3";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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group2 {
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pinmux = <&iomuxc1_sd2_vselect_usdhc_vselect_usdhc2_vselect>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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};
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group3 {
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pinmux = <&iomuxc1_sd2_cd_b_gpio_io_gpio3_io00>,
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<&iomuxc1_sd2_reset_b_gpio_io_gpio3_io07>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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bias-pull-up;
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};
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};
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pinmux_usdhc2_200mhz: pinmux_usdhc2_200mhz {
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group0 {
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pinmux = <&iomuxc1_sd2_clk_usdhc_clk_usdhc2_clk>;
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drive-strength = "x6";
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bias-pull-down;
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slew-rate = "fast";
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input-schmitt-enable;
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};
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group1 {
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pinmux = <&iomuxc1_sd2_cmd_usdhc_cmd_usdhc2_cmd>,
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<&iomuxc1_sd2_data0_usdhc_data_usdhc2_data0>,
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<&iomuxc1_sd2_data1_usdhc_data_usdhc2_data1>,
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<&iomuxc1_sd2_data2_usdhc_data_usdhc2_data2>,
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<&iomuxc1_sd2_data3_usdhc_data_usdhc2_data3>;
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drive-strength = "x6";
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slew-rate = "fast";
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input-schmitt-enable;
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bias-pull-up;
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input-enable;
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};
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group2 {
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pinmux = <&iomuxc1_sd2_vselect_usdhc_vselect_usdhc2_vselect>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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};
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group3 {
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pinmux = <&iomuxc1_sd2_cd_b_gpio_io_gpio3_io00>,
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<&iomuxc1_sd2_reset_b_gpio_io_gpio3_io07>;
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drive-strength = "x4";
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slew-rate = "slightly_fast";
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bias-pull-up;
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};
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};
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};

‎boards/nxp/imx93_evk/imx93_evk_mimx9352_a55.dts

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phys = <&can_phy0>;
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status = "okay";
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};
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&usdhc1 {
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pinctrl-0 = <&pinmux_usdhc1>;
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pinctrl-1 = <&pinmux_usdhc1_100mhz>;
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pinctrl-2 = <&pinmux_usdhc1_200mhz>;
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pinctrl-names = "default", "med", "fast";
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mmc-hs200-1_8v;
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mmc-hs400-1_8v;
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read-watermark = <0x10>;
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write-watermark = <0x80>;
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status = "disabled";
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sdmmc {
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compatible = "zephyr,mmc-disk";
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disk-name = "SD2";
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status = "disabled";
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};
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};
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&usdhc2 {
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pinctrl-0 = <&pinmux_usdhc2>;
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pinctrl-1 = <&pinmux_usdhc2_100mhz>;
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pinctrl-2 = <&pinmux_usdhc2_200mhz>;
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pinctrl-names = "default", "med", "fast";
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pwr-gpios = <&gpio3 7 GPIO_ACTIVE_HIGH>;
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cd-gpios = <&gpio3 0 GPIO_ACTIVE_LOW>;
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power-delay-ms = <20>;
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mmc-hs200-1_8v;
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mmc-hs400-1_8v;
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read-watermark = <0x10>;
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write-watermark = <0x80>;
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status = "disabled";
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sdmmc {
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compatible = "zephyr,sdmmc-disk";
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disk-name = "SD";
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status = "disabled";
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};
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};

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