Dead lock occurred while opening /dev/console with ttymxc0

[zhb1984]

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

[joanxie]

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

[zhb1984]

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.

[joanxie]

try to refer to the enclosed file