mx6q boot on linux-next 20130703

[Shawn Guo]

On Thu, Jul 04, 2013 at 01:08:13AM -0300, Fabio Estevam wrote:
> On Wed, Jul 3, 2013 at 8:52 PM, Fabio Estevam <festevam at gmail.com> wrote:
> > Hi,
> >
> > I am running linux-next 20130703 on a mx6q board, and seeing a strange
> > behaviour.
> >
> > Only if I enable DEBUG_LL + earlyprintk and disable

Yes, I see the issue here too, and turning on earlyprintk can remove the
issue.

> > CONFIG_SERIAL_FSL_LPUART (serial driver for the FSL Vybrid SoC), I am

This is irrelevant according to my test.

> > able to boot the kernel until the prompt.
> >
> > Does anyone have any suggestion?
> 

I do not get time to track it down.  But it does not seems to be an imx
specific problem.

> Ok, I managed to boot the default imx_v6_v7_defconfig on my mx6q board if I do:
> 
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -1652,7 +1652,7 @@ static void __exit imx_serial_exit(void)
>         uart_unregister_driver(&imx_reg);
>  }
> 
> -module_init(imx_serial_init);
> +arch_initcall(imx_serial_init);
>  module_exit(imx_serial_exit);
> 
>  MODULE_AUTHOR("Sascha Hauer");
> 
> Is this the correct approach?

Without knowing the root cause of the problem, we can not tell.

Shawn