[PATCH 2/3] dt-bindings: qcom,pon: Add 'qcom,mode-in-imem' support

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It's not always the case that reboot mode value gets stored in PON
register.  For example, Sony Xperia M4 Aqua phone (MSM8939) uses a
different set of mode value and stores them in IMEM.  Add property
'qcom,mode-in-imem' to distinguish this mechanism from the existing one.

Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
---
 .../bindings/power/reset/qcom,pon.yaml        | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
index 7764c804af1d..a6270e39b7a2 100644
--- a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
+++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
@@ -23,6 +23,10 @@ properties:
   reg:
     maxItems: 1
 
+  qcom,mode-in-imem:
+    description: Reboot mode is stored in IMEM rather than PON register
+    type: boolean
+
 patternProperties:
   "^mode-.+":
     $ref: /schemas/types.yaml#/definitions/uint32
@@ -35,6 +39,7 @@ required:
 additionalProperties: false
 
 examples:
+  # Example 1: Reboot mode is stored in PON register
   - |
     pmic {
         #address-cells = <1>;
@@ -47,3 +52,17 @@ examples:
             mode-recovery = <0x1>;
         };
     };
+  # Example 2: Reboot mode is stored in IMEM
+  - |
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pon@800 {
+            compatible = "qcom,pm8916-pon";
+            reg = <0x860065c>;
+            qcom,mode-in-imem;
+            mode-bootloader = <0x77665500>;
+            mode-recovery = <0x77665502>;
+        };
+    };
-- 
2.17.1




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