The ARASAN MMC controller on Keystone 3 class of devices needs the SDCD
line to be connected for proper functioning. Similar to the issue pointed
out in sdhci-of-arasan.c driver, commit 3794c542641f ("mmc:
sdhci-of-arasan: Set controller to test mode when no CD bit").
In cases where SDCD line is not connected, adding
"ti,fails-without-test-cd" in the DT node helps to indicate the
controller, that the SDCD line has been pulled down, using the TESTCD bit.
Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx>
---
Documentation/devicetree/bindings/mmc/sdhci-am654.yaml | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-am654.yaml b/Documentation/devicetree/bindings/mmc/sdhci-am654.yaml
index 0566493c4def..0ab07759b472 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-am654.yaml
+++ b/Documentation/devicetree/bindings/mmc/sdhci-am654.yaml
@@ -186,6 +186,13 @@ properties:
description: Clock Delay Buffer Select
$ref: "/schemas/types.yaml#/definitions/uint32"
+ ti,fails-without-test-cd:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ When present, indicates that the CD line is not connected
+ and the controller is required to be forced into Test mode
+ to set the TESTCD bit.
+
required:
- compatible
- reg
--
2.17.1
