[RFC PATCH 1/3] dt-bindings: power: sequencing: qcom-wcn: document wakeup-source

[Linghui Wu <linghui.wu@oss.qualcomm.com>]

Some WCN3990-family designs connect SW_CTRL to an interrupt capable of
waking the application processor.

Document the dedicated "wakeup" interrupt and wakeup-source property for
the WCN PMU node.

Signed-off-by: Linghui Wu <linghui.wu@oss.qualcomm.com>
---
 .../bindings/regulator/qcom,wcn3990-pmu.yaml  | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/qcom,wcn3990-pmu.yaml b/Documentation/devicetree/bindings/regulator/qcom,wcn3990-pmu.yaml
index 9a7abc878b8..00cd8b6c27d 100644
--- a/Documentation/devicetree/bindings/regulator/qcom,wcn3990-pmu.yaml
+++ b/Documentation/devicetree/bindings/regulator/qcom,wcn3990-pmu.yaml
@@ -42,6 +42,20 @@ properties:
     maxItems: 1
     description: GPIO line indicating the state of the clock supply to the BT module
 
+  interrupts:
+    maxItems: 1
+    description: SW_CTRL wake interrupt, asserted when the WCN chip is active
+
+  interrupt-names:
+    const: wakeup
+
+  wakeup-source:
+    type: boolean
+    description:
+      Mark the PMU as a wakeup source. Requires the "wakeup" interrupt to be
+      present. When set, the SW_CTRL IRQ is used to wake the application
+      processor from system suspend.
+
   clocks:
     maxItems: 1
     description: Reference clock handle
@@ -67,6 +81,14 @@ required:
   - vddrf-supply
   - vddch0-supply
 
+dependencies:
+  wakeup-source:
+    required:
+      - interrupt-names
+    anyOf:
+      - required: [interrupts]
+      - required: [interrupts-extended]
+
 additionalProperties: false
 
 examples:
-- 
2.43.0