PM: UART not resuming from OFF mode

PM: UART not resuming from OFF mode

[Roger Quadros]

Hi,

  I'm facing this strange problem since some days. I have 3 identical boards 
using OMAP3430 ES3.1 and I'm using Kevin's PM tree. 
http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=shortlog;h=pm

The problem is that UART3 fails to operate correctly after OFF mode on _two_ of 
the boards but works on one. It seems to receive characters but 0 only. So 
characters do not show up on terminal.

Is anybody experiencing similar problems with UART and off mode on your boards?

regards,
-roger

Re: PM: UART not resuming from OFF mode

[Kevin Hilman]

Roger Quadros <ext-roger.quadros@nokia.com> writes:

>  I'm facing this strange problem since some days. I have 3 identical
> boards using OMAP3430 ES3.1 and I'm using Kevin's PM
> tree. http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=shortlog;h=pm
>
> The problem is that UART3 fails to operate correctly after OFF mode on
> _two_ of the boards but works on one. It seems to receive characters
> but 0 only. So characters do not show up on terminal.
>
> Is anybody experiencing similar problems with UART and off mode on your boards?

Is this after suspend-to-OFF or OFF-while-idle?

I've experienced this with UART1 on SDP ES3.0, but according to
Rajendra it didn't happen on SDP ES3.1 (I don't currently have any
ES3.1 hardware) :(

Are all of yours ES3.1 ?

I haven't tracked it further since I only saw it on my SDP with UART1
and not on any other board.

Kevin

RE: PM: UART not resuming from OFF mode

[Aguirre Rodriguez, Sergio Alberto]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Kevin Hilman
> Sent: Friday, August 07, 2009 11:21 AM
> To: Roger Quadros
> Cc: linux-omap@vger.kernel.org
> Subject: Re: PM: UART not resuming from OFF mode
> 
> Roger Quadros <ext-roger.quadros@nokia.com> writes:
> 
> >  I'm facing this strange problem since some days. I have 3 identical
> > boards using OMAP3430 ES3.1 and I'm using Kevin's PM
> > tree. http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-
> pm.git;a=shortlog;h=pm
> >
> > The problem is that UART3 fails to operate correctly after OFF mode on
> > _two_ of the boards but works on one. It seems to receive characters
> > but 0 only. So characters do not show up on terminal.
> >
> > Is anybody experiencing similar problems with UART and off mode on your
> boards?
> 
> Is this after suspend-to-OFF or OFF-while-idle?
> 
> I've experienced this with UART1 on SDP ES3.0, but according to
> Rajendra it didn't happen on SDP ES3.1 (I don't currently have any
> ES3.1 hardware) :(
> 
> Are all of yours ES3.1 ?

Could it be related to board encryption type (GP, EMU, HS)?

I'm not an expert on the topic, but I'm just throwing possible variants...

Regards,
Sergio
> 
> I haven't tracked it further since I only saw it on my SDP with UART1
> and not on any other board.
> 
> Kevin
> 
> 
> 
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Re: PM: UART not resuming from OFF mode

[Roger Quadros]

ext Aguirre Rodriguez, Sergio Alberto wrote:
> 
>> -----Original Message-----
>> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
>> owner@vger.kernel.org] On Behalf Of Kevin Hilman
>> Sent: Friday, August 07, 2009 11:21 AM
>> To: Roger Quadros
>> Cc: linux-omap@vger.kernel.org
>> Subject: Re: PM: UART not resuming from OFF mode
>>
>> Roger Quadros <ext-roger.quadros@nokia.com> writes:
>>
>>>  I'm facing this strange problem since some days. I have 3 identical
>>> boards using OMAP3430 ES3.1 and I'm using Kevin's PM
>>> tree. http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-
>> pm.git;a=shortlog;h=pm
>>> The problem is that UART3 fails to operate correctly after OFF mode on
>>> _two_ of the boards but works on one. It seems to receive characters
>>> but 0 only. So characters do not show up on terminal.
>>>
>>> Is anybody experiencing similar problems with UART and off mode on your
>> boards?
>>
>> Is this after suspend-to-OFF or OFF-while-idle?
>>
>> I've experienced this with UART1 on SDP ES3.0, but according to
>> Rajendra it didn't happen on SDP ES3.1 (I don't currently have any
>> ES3.1 hardware) :(
>>
>> Are all of yours ES3.1 ?
> 
> Could it be related to board encryption type (GP, EMU, HS)?

The boards on which it is passing and failing are ES3.1 HS.

> 
> I'm not an expert on the topic, but I'm just throwing possible variants...
> 
> Regards,
> Sergio
>> I haven't tracked it further since I only saw it on my SDP with UART1
>> and not on any other board.
>>
>> Kevin
>>
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-omap" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>