Messages in this thread | | | Subject | Re: [PATCH v3 11/15] mmc: sdhci-of-arasan: Add ability to export card clock | From | Adrian Hunter <> | Date | Wed, 22 Jun 2016 15:35:06 +0300 |
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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@chromium.org> > Reviewed-by: Heiko Stuebner <heiko@sntech.de> > Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
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