From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Stuebner Subject: Re: [PATCH v2 06/11] Documentation: mmc: sdhci-of-arasan: Add ability to export card clock Date: Sat, 18 Jun 2016 20:02:44 +0200 Message-ID: <5140493.iC6MOixRVW@phil> References: <1465859076-4868-1-git-send-email-dianders@chromium.org> <1465859076-4868-7-git-send-email-dianders@chromium.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <1465859076-4868-7-git-send-email-dianders@chromium.org> Sender: linux-mmc-owner@vger.kernel.org To: Douglas Anderson Cc: ulf.hansson@linaro.org, kishon@ti.com, robh+dt@kernel.org, shawn.lin@rock-chips.com, xzy.xu@rock-chips.com, briannorris@chromium.org, adrian.hunter@intel.com, linux-rockchip@lists.infradead.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org Am Montag, 13. Juni 2016, 16:04:30 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 frequency in order to > function properly. Physically in a SoC this clock is exported from the > SDHCI IP block to the PHY IP block and the PHY needs to know the speed. > Let's export the SDHCI card clock using a standard device tree mechanism > so that the PHY can get access to it and query the card clock frequency. > > Signed-off-by: Douglas Anderson > Acked-by: Rob Herring Doug and me talked about how to solve this beforehand, so obviously I'm in favour of doing it like this :-) Reviewed-by: Heiko Stuebner