Thread (3 messages) 3 messages, 2 authors, 2012-12-11

8250 UART doesn't populate /proc/iomem?

From: prabhakar.csengg@gmail.com (Prabhakar Lad)
Date: 2012-12-10 11:06:55

Hi Woody,

On Mon, Dec 10, 2012 at 11:54 AM, Woody Wu [off-list ref] wrote:
Hi, list

I found some io memory information is lost from /dev/iomem and want to
find out why.

I have a 2.6.16 kernel running on a ARM board (Samsung S3C2410). From
the kernel log, I see 16 8250 serial ports were detected, and each of
thoese ports has a memory address:
[Snip]
You see, there is no serial8250 informations.

Can anyone here please tell me how this can happen?  Does it mean the
serial8250 driver don't populate or register in the /proc/iomem?
Can you look at the o/p of /proc/ioports and see if the entry is present here.

Regards,
--Prabhakar Lad
--
woody
I can't go back to yesterday - because I was a different person then.


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