topic Re: Linux crashes while opening /dev/console with ttymxc0 in i.MX Processors

Dead lock occurred while opening /dev/console with ttymxc0

zhb1984 — Wed, 30 Dec 2020 06:47:55 GMT

Hello,

I am using i.MX6SoloX to develop application with custom board. U-Boot and Linux porting have been done. Everything is OK except that Linux hung while opening /dev/console with ttymxc0. It tried to do spin_lock_irqsave in imx_uart_startup. But at this point, the lock was already acquired. So dead lock occurred.

Can someone give any advice?

Thanks

Re: Linux crashes while opening /dev/console with ttymxc0

joanxie — Tue, 29 Dec 2020 07:52:42 GMT

for your customized board, did your HW is the same as nxp board? did you use the same uart console as nxp board?

Re: Linux crashes while opening /dev/console with ttymxc0

zhb1984 — Tue, 29 Dec 2020 08:00:01 GMT

Yes, my board is referenced to Sabre SD board. But there is no SN74LVC2G126 between i.MX6SX UART and USB bridge. And UART1 is used as the I/O port which is same as NXP board.

Re: Linux crashes while opening /dev/console with ttymxc0

joanxie — Wed, 06 Jan 2021 08:13:43 GMT

try to refer to the enclosed file