[PATCH] ARM: pxa27x: fix ac97 controller warm reset code

Mike Dunn mikedunn at newsguy.com
Fri Dec 28 16:04:59 EST 2012


On 12/28/2012 11:49 AM, Sergei Shtylyov wrote:
> Hello.
> 
> On 12/28/2012 05:52 PM, Mike Dunn wrote:
> 
>> This patch fixes some code that implements a work-around to a hardware bug in
>> the ac97 controller on the pxa27x.  A bug in the controller's warm reset
>> functionality requires that the mfp used by the controller as the AC97_RESET_n
>> line be temporarily reconfigured as a generic output gpio (AF0) and manually
>> held high for the duration of the warm reset cycle.  This is what was done in
>> the original code, but it was broken long ago by commit
>> fb1bf8cd13bfa7ed0364ab0d82f717fc020d35f6, which changed the mfp to a GPIO input
> 
>    Please also specify the summary of that commit in parens.


OK, will resend patch.

Thanks,
Mike



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