Other NXP ProductsのトピックRe: s32r45-emmc-linux-boot

s32r45-emmc-linux-boot

nwws — Sun, 10 May 2026 09:09:11 GMT

Currently, we have switched the SD card of our S32R45 hardware board to eMMC, and we are encountering some issues. The symptoms are as follows:

1. The eMMC can be started normally. In U-boot, it is detected that the eMMC is functioning properly. The relevant print information is as follows：

part list mmc 0

Partition Map for MMC device 0 -- Partition Type: DOS

Part Start Sector Num Sectors UUID Type

1 4096 520192 52cecc02-01 0c

2 524288 1572864 52cecc02-02 83

However, when boot linux, an error will occur.

[ 0.951020] mmc0: SDHCI controller on 402f0000.usdhc [402f0000.usdhc] using ADMA

[ 1.003621] sdhci-esdhc-imx 402f0000.usdhc: card claims to support voltages below defined range

。。。

[ 0.910076] mmc0: CQHCI version 5.10

[ 0.951020] mmc0: SDHCI controller on 402f0000.usdhc [402f0000.usdhc] using ADMA

[ 1.063158] mmc0: error -110 whilst initialising MMC card

。。。

[ 1.105490] Waiting for root device /dev/mmcblk0p2... //---》 The linux will stuck here

The device tree has been modified as follows:：

&usdhc0 {

bus-width = <8>; /* eMMC must 8bit width */

non-removable; /* eMMC Marked as non-removable (onboard storage) */

no-1-8-v;

no-sd; /* emmc */

no-sdio; /* emmc */

/*cap-mmc-highspeed; */ /* emmc */

disable-wp; /* emmc */

max-frequency = <26000000>; /* emmc */

status = "okay";

};

So I would like to ask, what's the problem for Linux to run properly on the eMMC? Thank you!

PS：

The current version of the Linux BSP being used is bsp33.

The emmc io voltage is 3.3v on board

The emmc chip is MTFC32GAP

Re: s32r45-emmc-linux-boot

petervlna — Mon, 11 May 2026 07:47:24 GMT

Hello,

Have a look at this post for steps needed to change the SD for eMMC

https://community.nxp.com/t5/Other-NXP-Products/s32r45-unable-to-boot-from-eMMC/td-p/2351382

Best regards,

Peter

Re: s32r45-emmc-linux-boot

nwws — Tue, 12 May 2026 01:17:08 GMT

I checked the content in the link and found it to be inconsistent with what we have here. Actually, the emmc boot has been successful, ATF and Uboot can run normally, and I have also entered the Linux environment. However, during the Linux initialization, the emmc initialization failed. So it seems that the Linux-bsp is not running properly. Currently, I have only modified the device tree related to usdhc. So I would like to ask if there are any other places that need to be modified?

Re: s32r45-emmc-linux-boot

nwws — Wed, 13 May 2026 07:46:30 GMT

Hi, can you help me with this? or is there any AN for how to setup emmc for s32r45? Thank you!