Re: ARC fails to boot on linux-next of 20140711

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 07/25/2014 10:33 PM, Grant Likely wrote:
On Fri, 25 Jul 2014 09:15:22 -0500, Rob Herring <robherring2@xxxxxxxxx> wrote:
On Fri, Jul 25, 2014 at 6:02 AM, Vineet Gupta
<Vineet.Gupta1@xxxxxxxxxxxx> wrote:
Hi Grant,

linux-next has a series for arc_uart (via tty tree) which converts it to generic
earlycon and specifies console via /chosen/stdout-path vs.  an explicit param in
/chose/bootargs

2014-06-24 9da433c0a0b5 ARC: [arcfpga] stdout-path now suffices for earlycon/console

This relied on prev commit of yours (from linux next of 20140711), which seem to
have disappeared now.

2014-03-27 a9296cf2d0b6 of: Create of_console_check() for selecting a console
specified in /chosen
2014-03-27 cfa9cacc5dd3 of: Enable console on serial ports specified by
/chosen/stdout-path

Is there a specific reason for dropping these patches (or perhaps a merge to be
merged). I cherry-picked both but still doesn't work.

Can you please advise next step forward, before I go off debugging with those
patches in.

There's an issue that if you have stdout-path and "earlycon" on the
command line, the kernel will switch to tty0 and disable the earlycon.

This is the "fix", but I don't like adding the DT dependency into generic code:

Yes, I'm not fond of it either. I've not been able to test it though and
work out a proper bug fix. As far as I can understand, the earlycon code
only works on aarch64, correct? I haven't been able to get an aarch64
boot working in QEMU yet.


Have a look at [1]. This worked for me with the latest qemu and the latest
pre-built root file system from [2].

Guenter

---
[1] http://www.bennee.com/~alex/blog/2014/05/09/running-linux-in-qemus-aarch64-system-emulation-mode/
[2] http://people.linaro.org/~alex.bennee/images/aarch64-linux-3.16rc3-buildroot.img
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux PPP]     [Linux FS]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Linmodem]     [Device Mapper]     [Linux Kernel for ARM]

  Powered by Linux