power: qpnp-smb2: Specify the min/max charger switching frequency

Add a device tree property to override the minimum and maximum
charger buck/boost switching frequency.

Change-Id: I6b827157c23a389edf2daa412e6825b6ce07a886
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/power/supply/qcom/qpnp-smb2.txt b/Documentation/devicetree/bindings/power/supply/qcom/qpnp-smb2.txt
index f4a22e0..e1f194f3 100644
--- a/Documentation/devicetree/bindings/power/supply/qcom/qpnp-smb2.txt
+++ b/Documentation/devicetree/bindings/power/supply/qcom/qpnp-smb2.txt
@@ -169,6 +169,18 @@
   Definition: Boolean flag which when present enables input suspend for
 		debug battery.
 
+- qcom,min-freq-khz
+  Usage:      optional
+  Value type: <u32>
+  Definition: Specifies the minimum charger buck/boost switching frequency
+		in KHz. It overrides the min frequency defined for the charger.
+
+- qcom,max-freq-khz
+  Usage:      optional
+  Value type: <u32>
+  Definition: Specifies the maximum charger buck/boost switching frequency in
+		 KHz. It overrides the max frequency defined for the charger.
+
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 Second Level Nodes - SMB2 Charger Peripherals
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