[PATCH v3 11/15] mmc: sdhci-of-arasan: Add ability to export card clock

Adrian Hunter adrian.hunter at intel.com
Wed Jun 22 05:35:06 PDT 2016

On 20/06/16 20:56, Douglas Anderson wrote:
> 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 at chromium.org>
> Reviewed-by: Heiko Stuebner <heiko at sntech.de>
> Tested-by: Heiko Stuebner <heiko at sntech.de>

Acked-by: Adrian Hunter <adrian.hunter at intel.com>

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