From mboxrd@z Thu Jan 1 00:00:00 1970 From: heiko@sntech.de (Heiko Stuebner) Date: Fri, 17 Jun 2016 01:54:54 +0200 Subject: [PATCH v2.1 07/11] mmc: sdhci-of-arasan: Add ability to export card clock In-Reply-To: <1466008675-9357-8-git-send-email-dianders@chromium.org> References: <1466008675-9357-8-git-send-email-dianders@chromium.org> Message-ID: <2078624.p3pqVZlzC3@phil> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 for me this looks very nice implementation-wise and I also didn't spot glaring things, so Reviewed-by: Heiko Stuebner and as states in the original series, on a rk3399-evb Tested-by: Heiko Stuebner