[PATCH v2.1 07/11] mmc: sdhci-of-arasan: Add ability to export card clock

[heiko@sntech.de (Heiko Stuebner)]

Am Mittwoch, 15. Juni 2016, 09:37:51 schrieb Douglas Anderson:
> Some SD/eMMC PHYs (like the PHY from Arasan that is designed to work
> with arasan,sdhci-5.1) need to know the card clock in order to function
> properly.  Let's add the ability to expose this clock.  Any PHY that
> needs to know the clock rate can add a reference and query the clock
> rate.
> 
> At the moment we register a CLK_GET_RATE_NOCACHE clock that simply
> allows querying the clock.  This allows us to be less intrusive with
> regards to the main SDHCI driver, which has complex logic for adjusting
> the SD clock.  Right now we always fully power cycle the PHY when the
> clock changes and that gives the PHY a good chance to query our clock.
> 
> Signed-off-by: Douglas Anderson <dianders@chromium.org>

for me this looks very nice implementation-wise and I also didn't spot 
glaring things, so
Reviewed-by: Heiko Stuebner <heiko@sntech.de>

and as states in the original series, on a rk3399-evb
Tested-by: Heiko Stuebner <heiko@sntech.de>