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| author | Aswath Govindraju <a-govindraju@ti.com> | 2022-04-25 12:01:19 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-04-26 14:05:55 +0200 |
| commit | 7a0587496a6233b9ffa8441573d38f8844751066 (patch) | |
| tree | ee4e34b63b791fb1da16b9d960557c20345516c5 /Documentation/devicetree/bindings/mmc | |
| parent | c25a7e5d18ba6e88932ef8ebcf6635cca630d032 (diff) | |
| download | lwn-7a0587496a6233b9ffa8441573d38f8844751066.tar.gz lwn-7a0587496a6233b9ffa8441573d38f8844751066.zip | |
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 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@ti.com>
Link: https://lore.kernel.org/r/20220425063120.10135-2-a-govindraju@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci-am654.yaml | 7 |
1 files changed, 7 insertions, 0 deletions
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 |