linux-kernel - Re: [PATCH] USB: otg: twl4030: fix phy initialization(v1)

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Date:	Tue, 7 Sep 2010 23:45:00 +0530
From:	venki kaps <venkiece2005@...il.com>
To:	Ming Lei <tom.leiming@...il.com>
Cc:	greg@...ah.com, linux-usb@...r.kernel.org,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Felipe Balbi <me@...ipebalbi.com>,
	Anand Gadiyar <gadiyar@...com>
Subject: Re: [PATCH] USB: otg: twl4030: fix phy initialization(v1)

Venkii,
On Tue, Sep 7, 2010 at 9:18 PM, venki kaps <venkiece2005@...il.com> wrote:
> Venkii,
>
> On Tue, Sep 7, 2010 at 9:10 PM, Ming Lei <tom.leiming@...il.com> wrote:
>> 2010/9/7 venki kaps <venkiece2005@...il.com>:
>>> thanks for your good response.
>>>
>>> Venkii,
>>>
>>> On Tue, Sep 7, 2010 at 6:54 PM, Ming Lei <tom.leiming@...il.com> wrote:
>>>> 2010/9/7 venki kaps <venkiece2005@...il.com>:
>>>>> Dear USB experts,
>>>>>
>>>>>  Is the same fix valid for omap3430 + 2.6.32 Kernel?
>>>>>
>>>>>  I have been facing mp3 playback idle current consumption 20mA more
>>>>> after booting without USB cable connected
>>>>>  but If USB cable detach and attach happen, then able to hit proper
>>>>> values otherwise irrespective of cold/warm reset
>>>>>  the current values increases to 20mA.
>>>>>
>>>>>  with cable,
>>>>>      OTG_SYSCONFIG standby mode of operation - SMART idle
>>>>>      HSOTGUSB_STANDBY - SMART standby
>>>>>
>>>>>  without cable,
>>>>>        OTG_SYSCONFIG standby mode of operation - SMART idle
>>>>>        HSOTGUSB_STANDBY - Active
>>>>>
>>>>>  Even i have applied  patch but still the same issue.
>>>>
>>>> Are you applying the patch below?
>>>>
>>>>         http://marc.info/?l=linux-omap&m=128378686221264&w=2
>>>>
>>>> The patch(USB: otg: twl4030: fix phy initialization(v1)) above is against
>>>> 2.6.36-rc3, I don't think you can apply it directly on 2.6.32. And the patch
>>>> is introduced to fix the problems caused by
>>>>
>>>>          commit 461c317705eca5cac09a360f488715927fd0a927.
>>>>
>>>> which change is committed into mainline 2.6.36-rc3.
>>>  >>> Yes, this patch i have applied.
>>
>> If you applied the patch, I guess you may see __twl4030_phy_power(twl, 0)
>> is called from .probe.
>>
>> If called,  seems your description a little contradictory since you observed
>> __twl4030_phy_power(twl, 0) may hit proper values, right?
>
>  Yes, __twl4030_phy_power(twl, 0) -  the current values are getting
> proper with or without cable.
>>
>> If not called, could you trace the return value of twl4030_usb_linkstat in
>> twl4030_usb_phy_init?
> ok, i can do that and update.
     twl4030_usb_linkstat return value is zero (0) in both
twl4030_usb_phy_init/twl4030_usb_irq.

>> thanks,
>>
>> --
>> Lei Ming
>>
>
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