[PATCH v2 2/4] dt-bindings: mtd: nand: Document the generic rb-gpios property

[Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>]

A few drivers use this property to describe GPIO pins used to sample
the NAND Ready/Busy state. Let's make it part of the generic binding
doc.

Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
---
Changes in v2:
* New patch
---
 Documentation/devicetree/bindings/mtd/nand-controller.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
index d261b7096c69..17f4dc8f8cab 100644
--- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml
+++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
@@ -119,6 +119,13 @@ patternProperties:
         description:
           Contains the native Ready/Busy IDs.
 
+      rb-gpios:
+        description:
+          Contains one or more GPIO descriptor (the numper of descriptor
+          depends on the number of R/B pins exposed by the flash) for the
+          Ready/Busy pins. Active state refers to the NAND ready state and
+          should be set to GPIOD_ACTIVE_HIGH unless the signal is inverted.
+
     required:
       - reg
 
-- 
2.25.4