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Date:   Fri,  1 Mar 2019 17:43:46 +0100
From:   Christoph Muellner <>
Cc:     Christoph Muellner <>,
        Philipp Tomsich <>,
        Michal Simek <>,
        Douglas Anderson <>,
        Viresh Kumar <>,
        Enric Balletbo i Serra <>,
        Tomasz Figa <>,
        Lin Huang <>, Randy Li <>,
        Tony Xie <>,
        Vicente Bergas <>,
        Ezequiel Garcia <>,
        Klaus Goger <>,,,,,
Subject: [PATCH 2/3] dt-bindings: mmc: Add a new property disable-cqe-dcmd.

This patch documents the new proprty disable-cqe-dcmd
for the Arasan eMMC 5.1 driver.

Signed-off-by: Christoph Muellner <>
Signed-off-by: Philipp Tomsich <>
 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.
 	sdhci@...00000 {

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