PROCESSOR-SDK-AM62A: Save environment var in uboot for EMMC booting

Joshua Bourgeot

Tool/software:

I am following the processor sdk section 3.1.1.5 to try and boot from the emmc (linked here). I can do all the steps successfully, and the boot works. However to successfully boot, I have to enter the following commands every single time in u-boot:

=> setenv mmcdev 0
=> setenv bootpart 0
=> boot

Before SDK 9, one could run a saveenv command to save these variables and boot without having to enter uboot. My question is: is there anyway to boot the emmc by default with the newest sdk?

Thank you,

Joshua Bourgeot

over 2 years ago

0 Prashant Shivhare over 2 years ago

TI__Guru* 87721 points

Hi Joshua,

Yes, you may apply the following patch in the U-Boot to modify the requirement environment variables for automatically booting Linux from eMMC UDA partition 1.

diff --git a/board/ti/am62ax/am62ax.env b/board/ti/am62ax/am62ax.env
index 9d44c80cd82..952303e4ad1 100644
--- a/board/ti/am62ax/am62ax.env
+++ b/board/ti/am62ax/am62ax.env
@@ -17,8 +17,8 @@ args_all=setenv optargs ${optargs} earlycon=ns16550a,mmio32,0x02800000
 run_kern=booti ${loadaddr} ${rd_spec} ${fdtaddr}
 
 boot=mmc
-mmcdev=1
-bootpart=1:2
+mmcdev=0
+bootpart=0:1
 bootdir=/boot
 rd_spec=-
 rproc_fw_binaries= 0 /lib/firmware/am62a-mcu-r5f0_0-fw 1 /lib/firmware/am62a-c71_0-fw

Regards,

Prashant

0 Joshua Bourgeot over 2 years ago in reply to Prashant Shivhare

Prodigy 240 points

Hello Prashant,

I was expecting a solution that would not require rebuilding / deploying an emmc configured u-boot. Is there some way to do this from the shell? Or perhaps a way to have u-boot try to boot from the emmc before the sd card?

Best,

Joshua Bourgeot

0 Prashant Shivhare over 2 years ago in reply to Joshua Bourgeot

TI__Guru* 87721 points

Hi Joshua,

Can you please see if the following helps

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1307234/processor-sdk-am62x-am62x-backup-image-switching-mechanism/4965575#4965575

Regards,

Prashant

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PROCESSOR-SDK-AM62A: Save environment var in uboot for EMMC booting