This patch documents the new property disable-cqe-dcmd
for the Arasan eMMC 5.1 driver.
Signed-off-by: Christoph Muellner <christoph.muellner@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Philipp Tomsich <philipp.tomsich@xxxxxxxxxxxxxxxxxxxxx>
---
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
