Re: [PATCH v3] usb: phy: mxs: Add DT bindings to configure TX settings

[Peter Chen <hzpeterchen-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Mon, Jun 13, 2016 at 04:40:55PM -0400, Jaret Cantu wrote:
> >
> >According to your previous information, the single formula can't be used
> >to get D_CAL value, do you have any good ways except for using a table?
> 
> That is not exactly what I said:
> 
> "I can't find any formula which would hit all of those same
> percentages **without rounding up.**"
> 

Sorry, my careless.

> I did find a formula that hits all of the percentages with rounding
> up, and I listed this formula (in shell form) previously. The
> rounding (+ (119-80)/2) just makes it look a little more awkward
> than I would like:
> 
> $ for d in 119 116 114 112 109 106 103 100 97 95 93 90 88 86 83 79;
> do echo "$d="$(( ( (119-$d) * 0xf + (119-80)/2 ) / (119-80) ));
> d=$((d+1)); done
> 119=0
> 116=1
> 114=2
> 112=3
> 109=4
> 106=5
> 103=6
> 100=7
> 97=8
> 95=9
> 93=10
> 90=11
> 88=12
> 86=13
> 83=14
> 79=15
> 
> These current percentage/register value pairs match the D_CAL table.
> 
> 
> > Sending the patch for new algorithm to speed up this issue please.
> >
> There were also some Documentation changes from between when I
> created this patch and the current HOL for which I had to modify the
> patch.

I will review and test your v4 patch, thanks.

-- 

Best Regards,
Peter Chen
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