i.MX6UL从eMMC启动出现问题。

[luluxu]

imx6ul evk 的底板（原理图编号是：SCH-28616）+ SCH-29090的核心板;

Linux版本是3.14.52 ;

使用MFGtools烧写时，没有报错，串口也能正常输出。

烧录成功后从eMMC启动时，串口无任何打印信息，过一段时间后，i.MX6ul 自动变到烧录模式。

这可能是什么原因导致的？

谢谢！

[igorpadykov]

Q: i.MX6UL problem with booting from eMMC.
imx6ul evk floor (diagram number is: SCH-28616) + SCH-29090 core board;
Linux version is 3.14.52;
When using MFGtools programming, there is no error, the serial port can be normal output.
After the successful launch of programming from eMMC, serial no printed information, after some time, i.MX6ul automatically change to the programming mode.
What could be the causes?

A: Had you run ddr test for custom board?

https://community.freescale.com/docs/DOC-105652 

https://community.nxp.com/docs/DOC-331528

after test please rebuild uboot with new calibration settings in *.cfg

file, set correct ddr size in uboot/include/configs/*board*.h file.

Best regards
igor
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[luluxu]

Hi Igor,

   Thanks for your help.

   I  did the ddr test, It's no use.

   And，The board is made by NXP,  the PCB version is SCH-29090_REV_C.

[igorpadykov · Accepted solution]

Hi lulu

please try PF3001 patches
http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/commit/?h=imx_3.14.52_1.1.0_ga&id=e5a7a7...
http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/commit/drivers/regulator/pfuze100-regula...