devmem2 giving bus error on imx8mq linux

mahesh_hns — Tue, 27 Aug 2024 20:38:09 GMT

Hello,

I was trying to read the SW_MUX_CTL_PAD_SD1_DATA4 SW MUX Control register (0x3033_00B8) using devmem2 on imx8mQ processor running linux (5.15) and got this

devmem2 0x303300B8
/dev/mem opened.
Memory mapped at address 0xffff9abd1000.
Bus error

I never had any issues like these while reading the mux registers on imx8mP processor.
Why is that? What do I need to do to read the pad/mux registers on imx8mQ ?

Thanks in advance

Re: devmem2 giving bus error on imx8mq linux

Zhiming_Liu — Wed, 28 Aug 2024 02:07:23 GMT

We can read this register on EVK board.

root@imx8mqevk:/unit_tests# ./memtool -32 0x303300B8 1 E Reading 0x1 count starting at address 0x303300B8 0x303300B8: 00000000

Best Regards
Zhiming

i.MX ProcessorsのトピックRe: devmem2 giving bus error on imx8mq linux

devmem2 giving bus error on imx8mq linux

Re: devmem2 giving bus error on imx8mq linux