RE: What is missing from musb - linux-omap merge?

[Hema Kalliguddi <hemahk@ti.com>]

>-----Original Message-----
>From: Felipe Balbi [mailto:balbi@ti.com]
>Sent: Thursday, April 07, 2011 5:08 PM
>To: Jarkko Nikula
>Cc: Hema Kalliguddi; OMAP Linux discussion; Felipe Balbi
>Subject: Re: What is missing from musb - linux-omap merge?
>
>On Thu, Apr 07, 2011 at 01:34:52PM +0300, Jarkko Nikula wrote:
>> Hi
>>
>> On Thu, 7 Apr 2011 14:38:06 +0530
>> Hema Kalliguddi <hemahk@ti.com> wrote:
>>
>> > I tried the core retention with v2.6.39-rc1 with
>OMAP3630Zoom3 board
>> > and don't observe any issues. Core is transitioning to
>retention without
>> > any issue,
>> > with or without musb driver loaded.
>> >
>> > But on OMAP3430SDP I am observing the crash when try to do
>> > echo mem > /sys/power/state.
>> >
>> > Attached is the fix for this issue and core transitions to
>retention.
>> >
>> Hmm.. suspend/resume are fine on Nokia N900 with and without
>the patch.
>> Patch also didn't fix the idle retention.
>>
>> > When you say retention is not working can you please carify what is
>> > happening?
>> > are you trying in idle path retention or suspend/resume?
>> >
>> Sorry not being verbose enough, I was testing the idle retention.
>>
>> For me it looks these differencies are explained by different
>> bootloaders. As Kevin told they may leave MUSB in a wrong
>state. Was it
>> so that before hwmod conversion the musb did IP reset etc
>and now this
>> feature is missing? So I'm thinking is this problem a regression or
>> missing feature after hwmod conversion?
>
Hwmod will take care of restting the ip if the SYSC_HAS_SOFTRESET
sysc_flag
is set. And it is being set in the hwmod structure of OMAP3.

I tested both idle path and suspend/resume retention and works fine
on OMAP3430SDP.
I am wondering what might be the problem with N900. Is it works if you do
the
ip reset in the musb driver?

Regards,
Hema

>it's possibly a regression. I remember we had softreset before. Should
>be fixed.
>
>--
>balbi
>