linux-kernel - [PATCH 2/3] dt-bindings: mmc: Add a new property disable-cqe-dcmd.

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Message-Id: <20190301164349.60589-2-christoph.muellner@theobroma-systems.com>
Date:   Fri,  1 Mar 2019 17:43:46 +0100
From:   Christoph Muellner <christoph.muellner@...obroma-systems.com>
To:     robh+dt@...nel.org, mark.rutland@....com, heiko@...ech.de,
        shawn.lin@...k-chips.com, ulf.hansson@...aro.org,
        adrian.hunter@...el.com
Cc:     Christoph Muellner <christoph.muellner@...obroma-systems.com>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        Michal Simek <michal.simek@...inx.com>,
        Douglas Anderson <dianders@...omium.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Lin Huang <hl@...k-chips.com>, Randy Li <ayaka@...lik.info>,
        Tony Xie <tony.xie@...k-chips.com>,
        Vicente Bergas <vicencb@...il.com>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Klaus Goger <klaus.goger@...obroma-systems.com>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
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 <christoph.muellner@...obroma-systems.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@...obroma-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@...00000 {
-- 
2.11.0