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dt-bindings: mmc: sdhci-am654: Add flag to force setting of TESTCD bit

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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 3794c54264 ("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@ti.com>
Link: https://lore.kernel.org/r/20220425063120.10135-2-a-govindraju@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Aswath Govindraju 2022-04-25 12:01:19 +05:30 committed by Ulf Hansson
parent c25a7e5d18
commit 7a0587496a
1 changed files with 7 additions and 0 deletions
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7
Documentation/devicetree/bindings/mmc/sdhci-am654.yaml
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@ -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