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@xxxxxxxxxxxx> > Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> > Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
