dt-bindings: buses: Add new property in MSM geni serial bindings for Sun

Change https://lore.kernel.org/all/20230525113034.46880-1-tony@atomide.com
registers serial core controller as a child of msm uart device.

Since child should suspend first, due to the child's auto suspend
delay (SERIAL_PORT_AUTOSUSPEND_DELAY_MS), additional 500msecs
delay is added during msm_geni_serial_runtime_suspend.

Added new optional dtsi property 'qcom,suspend-ignore-children'
which when set ignores dependencies on children by PM framework, this
helps to exit quickly from msm_geni_serial_runtime_suspend and save power.

Change-Id: I36b239cf19293ee7b1ebecf32cdd0ad0749dbca1
Signed-off-by: Visweswara Tanuku <quic_vtanuku@quicinc.com>

bindings/serial/qcom,serial-geni-msm.yaml

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
 %YAML 1.2
 ---
-$id: "http://devicetree.org/schemas/serial/qcom,msm-geni-uart.yaml#"
+$id: "http://devicetree.org/schemas/serial/qcom,serial-geni-msm.yaml#"
 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
 
 title: Qualcomm Technologies, Inc. Serial UART for GENI based cores
@@ -34,9 +34,8 @@ properties:
       - const: qup-memory
 
   interrupts:
-    minItems: 1
-    items:
-      - description: UART core irq
+    description: first irq for UART core & second irq for host wake up
+    maxItems: 2
 
   operating-points-v2: true
 
@@ -59,9 +58,10 @@ properties:
   reg:
     maxItems: 1
 
-  interrupts:
-    items:
-      - description: byte which is used for waking up.
+  # Optional property
+  qcom,suspend-ignore-children:
+    type: boolean
+    description: When set ignores dependencies on children by PM framework
 
 required:
   - compatible
@@ -101,5 +101,6 @@ examples:
         pinctrl-3 = <&qupv3_se14_default_cts>, <&qupv3_se14_default_rts>,
             <&qupv3_se14_default_tx>, <&qupv3_se14_default_rx>;
         qcom,wakeup-byte = <0xFD>;
+        qcom,suspend-ignore-children;
     };
 ...