8MMINID4 Reference Design + eMMC boot issue

[KennyChu]

Hi Supporter,

We follow 8MMINID4 to design a new HW and replace NAND to eMMC as below.

We can update image successfully by using UUU tool. Please check UUU log and uuu.auto for command list.

After reboot, it will hang up at u-boot and complain "MMC Device 1 not found". 

Can you help to check and advise?

boot up log:

U-Boot SPL 2019.04-lf-5.4.y_v2019.04+g48508669 (Dec 02 2020 - 02:47:35 +0000)

power_pca9450_init

DDRINFO: start DRAM init

Training FAILED

DDRINFO:ddrphy calibration done

DDRINFO: ddrmix config done

Normal Boot

Trying to boot from MMC2

MMC Device 1 not found

spl: could not find mmc device 1. error: -19

SPL: failed to boot from all boot devices

In U-boot prompt, we can found eMMC device at port2.

log:

u-boot=>

u-boot=> mmc list

FSL_SDHC: 2

u-boot=> mmc dev 1

MMC Device 1 not found

no mmc device at slot 1

u-boot=> mmc dev 2

switch to partitions #0, OK

mmc2(part 0) is current device

u-boot=>

Regards,

Kenny

[Rita_Wang]

Which uSDHC are you using for emmc? uSDHC1?

[KennyChu]

@Rita_Wang 

Any update?

[Rita_Wang · Accepted solution]

In the software the uSDHC3 clock is not initialized in default. We must let CONFIG_SYS_FSL_USDHC_NUM=2 to run the uSDHC3 clock initialization code. How to add you can refer to the thread by my colleague.

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Enabling-uSDHC1-of-i-MX8MM-Based-On-L5-4...

[KennyChu]

@Rita_Wang 

Thanks a lot. It can enter kernel now.

[Rita_Wang]

Good news it works now.

[KennyChu]

We are using uSDHC3. You can check ROM Fuse map below.