From: Varshini Rajendran <varshini.rajendran@microchip.com>

Add microchip,lpm-connection binding which allows to specify the devices
the SHDWC's LPM pin is connected.

Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>
[ryan.wanner@microchip.com: Add sam9x7-shdwc SoC to properties check]
Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
---
 .../power/reset/atmel,sama5d2-shdwc.yaml         | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml b/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
index 9c34249b2d6d..b1a8ccd0873d 100644
--- a/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
+++ b/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
@@ -56,6 +56,10 @@ properties:
     description: enable real-time timer wake-up
     type: boolean
 
+  microchip,lpm-connection:
+    description: list of phandles to devices which are connected to SHDWC's LPM pin
+    $ref: /schemas/types.yaml#/definitions/phandle
+
 patternProperties:
   "^input@[0-15]$":
     description:
@@ -96,6 +100,18 @@ allOf:
       properties:
         atmel,wakeup-rtt-timer: false
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - atmel,sama5d2-shdwc
+              - microchip,sam9x60-shdwc
+              - microchip,sam9x7-shdwc
+    then:
+      properties:
+        microchip,lpm-connection: false
+
 additionalProperties: false
 
 examples:
-- 
2.43.0