[PATCH v2] mmc: sunxi: Handle the 'New Timings'

[Jean-Francois Moine]

Hi Chen-Yu,

On Mon, 1 Aug 2016 21:52:48 +0800
Chen-Yu Tsai <wens at csie.org> wrote:

> On Mon, Aug 1, 2016 at 9:10 PM, Jean-Francois Moine <moinejf at free.fr> wrote:
> > Some MMC devices as mmc2 in the A83T or mmc1 and mmc2 in the H3 have
> > a 'New Timings' mode.
> > Set this capacity in the DT and use it when possible.
> 
>            ^^ capability?
> 
> Also, in this patch you are adding support for a DT boolean flag
> property, not adding stuff to the DT.

Sorry, forgotten.

> >
> > Signed-off-by: Jean-Francois Moine <moinejf at free.fr>
> > ---
> 
> I got 3 copies of the same patch...

Maybe because I sent it to you, and to the mmc and sunxi lists.

> > I don't know if this mode works or is needed at 25MHz.
> 
> Could you test it? You can change mmc->f_max in the probe function
> to limit it to 25 MHz.
> 
> I'm more interested in the throughput you get after applying this
> patch though.

I did a test on a BPI-M2+ (H3). The new timings don't work at 25MHz,
neither for mmc1 (wifi) - nor for mmc2 (eMMC).

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/