how to change debug uart from uart5 to uart1 on ast2500 romulus?

[不语]

Dear openbmcer,

 Thank you for your quick reply.

 My code is based on openbmc meta-ibm/meta-romulus.I think it is similar to ast2500.evb. I tried to change debug console uart5(ttl) to uart1(rs232) on uboot and kernel linux.

 I read the ast2500 manual,find we can set Hardware Strap gpio or Hardware Strap register bit29 to changedebug console between uart5 and uart1 but not effective.

 I also tried these:

 (1) modify CONFIG_BOOTARGS to "console=ttyS0,115200n8 root=/dev/ram rw" on uboot ast-g5.c

 (2) modify stdout-path = &uart1; bootargs = "console=ttyS0,115200 earlyprintk";  on kernel aspeed-bmc-opp-romulus.dts

 

 Any advice will be appreciated.

Thanks,

JunHeng
















At 2020-07-24 10:38:30, "chunhui.jia" <chunhui.jia at linux.intel.com> wrote:

Is it AST2500-EVB?
 
2020-07-24
chunhui.jia
发件人：不语 <junhengdi at 163.com>
发送时间：2020-07-23 17:54
主题：how to change debug uart from uart5 to uart1 on ast2500 romulus?
收件人："openbmc"<openbmc at lists.ozlabs.org>
抄送：
 

Dear opembmcer,

I am green to openbmc and I want to learn something about ast2500.Now I have one board ast2500 and 

use openbmc code romulus.I know the default debug uart is uart5 and I want to change it to uart1,because

on my board, uart1 is rs232.I have tried these ,but not effective.

(1) set the hardware strap register bit29 0 on ast-g5.c

(2) set CONFIG_SYS_NS16550_COM1 from 0x1E784000 to 0x1E783000




Any addvice will be appricated.

                                             Thanks,

                                             JunHeng





 
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