dt-bindings: soc: qcom,pmic-glink: Add charge limit nvmem properties

Add nvmem properties to retrieve charge control configurations
from the PMIC SDAM registers.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml

@@ -56,6 +56,20 @@ properties:
       The array should contain a gpio entry for each PMIC Glink connector, in reg order.
       It is defined that GPIO active level means "CC2" or Reversed/Flipped orientation.
 
+  nvmem-cells:
+    minItems: 3
+    maxItems: 3
+    description:
+      The nvmem cells contain the charge control settings, including the charge control
+      enable status, the battery state of charge (SoC) threshold for stopping charging,
+      and the battery SoC delta required to restart charging.
+
+  nvmem-cell-names:
+    items:
+      - const: charge_limit_en
+      - const: charge_limit_end
+      - const: charge_limit_delta
+
 patternProperties:
   '^connector@\d$':
     $ref: /schemas/connector/usb-connector.yaml#