NOR boot does not work on DM8148 Rev C devices

Mark Utter

Expert 7155 points

Hello,

Customer has been using DM8148 rev B devices and both NOR flash & UART boots work ok.

They are now using rev C devices for the first time on thier boards and are unable to boot from NOR flash & UART.

What are the differences between rev B & rev C? I did not see the rev C errata posted on the product page.

Is there some difference in the ROM bootloader?

-Mark

over 12 years ago

0 Mark Utter over 12 years ago

TI__Expert 7155 points

The patches that add support for PG3.0 (Rev C) can be accessed from:

U-boot: http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=commit;h=7dc9f3f41d987ce533e387a2d4f3263f1a19764c

Linux Kernel: http://arago-project.org/git/projects/?p=linux-omap3.git;a=commit;h=a7bba7d96133513d2b97d960a5b08f9196d09b04

These patches have been rolled into EZSDK 5.05.01.04. The customer rebuilt u-boot from this release and now rev C devices boot ok.

-Mark

0 Joel Keller over 12 years ago in reply to Mark Utter

Expert 1305 points

For anyone using these patches in the future, I found I needed to change the function pg_val_ti814x() in sys_info.c for uboot, in addition to the changes made in the above git commit. The change:

@@ -119,7 +121,7 @@ u32 pg_val_ti816x(u32 pg1_val, u32 pg2_v

u32 pg_val_ti814x(u32 pg1_val, u32 pg2_val)
{
/* PG2.1 devices should read 0x3 as chip rev */
- if (PG2_1 == get_cpu_rev())
+ if (PG2_1 <= get_cpu_rev())
return pg2_val;
else
return pg1_val;

Processors

Processors forum

NOR boot does not work on DM8148 Rev C devices