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From:   Christoph Muellner <christoph.muellner@theobroma-systems.com>
To:     robh+dt@kernel.org, mark.rutland@arm.com, heiko@sntech.de,
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Cc:     Christoph Muellner <christoph.muellner@theobroma-systems.com>,
        Philipp Tomsich <philipp.tomsich@theobroma-systems.com>,
        Michal Simek <michal.simek@xilinx.com>,
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        Lin Huang <hl@rock-chips.com>, Randy Li <ayaka@soulik.info>,
        Tony Xie <tony.xie@rock-chips.com>,
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        Ezequiel Garcia <ezequiel@collabora.com>,
        Klaus Goger <klaus.goger@theobroma-systems.com>,
        linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
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Subject: [PATCH 2/3] dt-bindings: mmc: Add a new property disable-cqe-dcmd.
Date:   Fri,  1 Mar 2019 17:43:46 +0100
Message-Id: <20190301164349.60589-2-christoph.muellner@theobroma-systems.com>
In-Reply-To: <20190301164349.60589-1-christoph.muellner@theobroma-systems.com>
References: <20190301164349.60589-1-christoph.muellner@theobroma-systems.com>
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This patch documents the new proprty disable-cqe-dcmd
for the Arasan eMMC 5.1 driver.

Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
---
 Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index 1edbb049cccb..ec699bf98b7c 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -44,6 +44,10 @@ Optional Properties:
     properly. Test mode can be used to force the controller to function.
   - xlnx,int-clock-stable-broken: when present, the controller always reports
     that the internal clock is stable even when it is not.
+  - disable-cqe-dcmd: The eMMC 5.1 standard specifies direct commands (DCMDs)
+    as part of the command queue engine (CQE). On controllers with a CQHCI,
+    such as the Arasan eMMC 5.1 host controller, the driver has to enable DCMDs.
+    This is done unless disable-cqe-dcmd is specified.
 
 Example:
 	sdhci@e0100000 {
-- 
2.11.0