Re: UHS-I voltage switching on OLPC XO-1.75

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Hi, adding Kevin,

On Mon, Nov 05 2012, Philip Rakity wrote:
> On Nov 5, 2012, at 1:11 PM, Chris Ball <cjb@xxxxxxxxxx> wrote:
>
>> Hi,
>> 
>> On Mon, Nov 05 2012, Philip Rakity wrote:
>>> Hi Daneil, Chris,
>>> 
>>> I reviewed kevin's patch in September which fixes this issue.  Chris
>>> -- can we pull it into mmc-next ?  This patch is okay as a standalone
>>> change.
>
> That was the original intent.
>
> The question is what to do if no regulator.  regulator_get was
> returning NULL in Daniel;s case.
> IS_ERR patch was not taken so UHS support was removed.  
> The intent of the original code was to remove UHS support if there was
> a regulator but it could not support voltage switching.

So this patch does fix a real bug, other than the pr_info -- by affecting
whether we disable UHS in the else clause -- and the commit message
doesn't mention the existence of that real bug at all, and performs a
cosmetic fix for vmmc at the same time as a semantic fix for vqmmc.
That's terrible.

I'll merge Kevin's patch after adding a commit message that explains
what's actually going on.

Thanks,

- Chris.
-- 
Chris Ball   <cjb@xxxxxxxxxx>   <http://printf.net/>
One Laptop Per Child
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