From: Douglas Anderson <dianders@chromium.org>
To: ulf.hansson@linaro.org, kishon@ti.com,
Heiko Stuebner <heiko@sntech.de>,
robh+dt@kernel.org
Cc: 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,
Douglas Anderson <dianders@chromium.org>,
pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 06/11] Documentation: mmc: sdhci-of-arasan: Add ability to export card clock
Date: Tue, 7 Jun 2016 15:44:39 -0700 [thread overview]
Message-ID: <1465339484-969-7-git-send-email-dianders@chromium.org> (raw)
In-Reply-To: <1465339484-969-1-git-send-email-dianders@chromium.org>
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 expose this clock using a standard device tree
mechanism so that the PHY can get access to and query the card clock.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---
Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index b67e623ca1ff..074d03e630ec 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -30,6 +30,12 @@ Optional Properties:
- arasan,soc-ctl-syscon: A phandle to a syscon device (see ../mfd/syscon.txt)
used to access core corecfg registers. Offsets of registers in this
syscon are determined based on the main compatible string for the device.
+ - clock-output-names: If specified, this will be the name of the card clock
+ which will be exposed by this device. Required if #clock-cells is
+ specified.
+ - #clock-cells: If specified this should be the value <0>. With this property
+ in place we will export a clock representing the Card Clock. This clock
+ is expected to be consumed by our PHY. You must also specify
Example:
sdhci@e0100000 {
@@ -61,7 +67,9 @@ Example:
arasan,soc-ctl-syscon = <&grf>;
assigned-clocks = <&cru SCLK_EMMC>;
assigned-clock-rates = <200000000>;
+ clock-output-names = "emmc_cardclock";
phys = <&emmc_phy>;
phy-names = "phy_arasan";
+ #clock-cells = <0>;
status = "disabled";
};
--
2.8.0.rc3.226.g39d4020
next prev parent reply other threads:[~2016-06-07 22:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 22:44 [PATCH 0/11] Changes to support 150 MHz eMMC on rk3399 Douglas Anderson
2016-06-07 22:44 ` [PATCH 01/11] phy: rockchip-emmc: Increase lock time allowance Douglas Anderson
2016-06-13 7:58 ` Shawn Lin
2016-06-13 23:07 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 02/11] mmc: sdhci-of-arasan: Always power the PHY off/on when clock changes Douglas Anderson
2016-06-13 8:08 ` Shawn Lin
2016-06-13 23:06 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 03/11] Documentation: mmc: sdhci-of-arasan: Add soc-ctl-syscon for corecfg regs Douglas Anderson
2016-06-08 20:17 ` Rob Herring
2016-06-13 8:18 ` Shawn Lin
2016-06-13 9:32 ` Heiko Stübner
2016-06-13 23:07 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 04/11] mmc: sdhci-of-arasan: Properly set corecfg_baseclkfreq on rk3399 Douglas Anderson
2016-06-13 8:36 ` Shawn Lin
2016-06-13 23:06 ` Doug Anderson
2016-06-14 0:14 ` Shawn Lin
2016-06-14 0:43 ` Doug Anderson
2016-06-14 0:59 ` Shawn Lin
2016-06-14 2:13 ` Doug Anderson
2016-06-16 1:06 ` Shawn Lin
2016-06-07 22:44 ` [PATCH 05/11] arm64: dts: rockchip: Add soc-ctl-syscon to sdhci for rk3399 Douglas Anderson
2016-06-07 22:44 ` Douglas Anderson [this message]
2016-06-08 20:19 ` [PATCH 06/11] Documentation: mmc: sdhci-of-arasan: Add ability to export card clock Rob Herring
2016-06-08 20:52 ` Doug Anderson
2016-06-10 13:10 ` Rob Herring
2016-06-13 23:05 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 07/11] " Douglas Anderson
2016-06-07 22:44 ` [PATCH 08/11] Documentation: phy: Let the rockchip eMMC PHY get an exported " Douglas Anderson
2016-06-10 13:36 ` Rob Herring
2016-06-13 23:05 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 09/11] phy: rockchip-emmc: Set phyctrl_frqsel based on " Douglas Anderson
2016-06-13 8:54 ` Shawn Lin
2016-06-13 23:05 ` Doug Anderson
2016-06-14 0:24 ` Shawn Lin
2016-06-14 0:45 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 10/11] phy: rockchip-emmc: Minor code cleanup in rockchip_emmc_phy_power_off() Douglas Anderson
2016-06-13 8:56 ` Shawn Lin
2016-06-13 23:05 ` Doug Anderson
2016-06-07 22:44 ` [PATCH 11/11] arm64: dts: rockchip: Provide emmcclk to PHY for rk3399 Douglas Anderson
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