8250 UART doesn't populate /proc/iomem?

[Woody Wu]

On 2012-12-10, Prabhakar Lad <prabhakar.csengg at gmail.com> wrote:
> Hi Woody,
>
> On Mon, Dec 10, 2012 at 11:54 AM, Woody Wu <narkewoody at gmail.com> 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.
>

'o/p'?  the /proc/ioports is a zero size file, it contains nothing.  I
think this is because the bard is an ARM, so there is no IO ports.

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