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
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