Hi Ulf,

On Tue, Jan 24, 2017 at 09:16:12AM +0100, Ulf Hansson wrote:

On 16 January 2017 at 17:56, Maxime Ripard
[off-list ref] wrote:

quoted

Experience have shown that the using the  autocalibration could severely
degrade the performances of the MMC bus.

Allwinner is using in its BSP a delay set to 0 for all the modes but HS400.
Remove the calibration code for now, and add comments to document our
findings.

So doesn't this break some platforms using HS400? Or are you saying
those are already broken?

Like Andre said, HS400 isn't supported at all, so there's no
regression or brokenness involved :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com