[PATCH v2 1/3] dt-bindings: mmc: Add power-off-delay-us property

Add power-off-delay-us property to MMC controller common.

This property shall be used to specify value of delay after
deasserting power during MMC power cycles. Default for delay
is 1000us but custom delay can be passed in to work around
hardware issues such as slow RC discharge on MMC VDD rails.

Signed-off-by: Judith Mendez <[email protected]>
---
Changes since v1:
- Change post-power-off-delay-ms to power-off-delay-us
- Fixup dt property description
- Fix check binding warnings and remove $ref
- Fix minimum from 0 to 1us
---
 .../devicetree/bindings/mmc/mmc-controller-common.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml
index 3d7195e9461c3..2015292618c80 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-controller-common.yaml
@@ -275,6 +275,16 @@ properties:
       not available.
     default: 10
 
+  power-off-delay-us:
+    description:
+      Delay in microseconds after card power is deasserted during a power
+      cycle to allow time for proper power discharge. Larger values can be
+      configured to work around hardware issues such as slow RC discharge
+      on MMC VDD rails.
+    minimum: 1
+    maximum: 10000000
+    default: 1000
+
   supports-cqe:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
-- 
2.54.0