Commit 7a058749 authored by Aswath Govindraju's avatar Aswath Govindraju Committed by Ulf Hansson
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dt-bindings: mmc: sdhci-am654: Add flag to force setting of TESTCD bit 



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 3794c542 ("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: default avatarAswath Govindraju <a-govindraju@ti.com>
Link: https://lore.kernel.org/r/20220425063120.10135-2-a-govindraju@ti.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent c25a7e5d

Documentation/devicetree/bindings/mmc/sdhci-am654.yaml

+7 −0
Original line number Diff line number Diff line
@@ -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