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diff --git a/Documentation/devicetree/bindings/iio/adc/x-powers,axp209-adc.yaml b/Documentation/devicetree/bindings/iio/adc/x-powers,axp209-adc.yaml
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/x-powers,axp209-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: X-Powers AXP ADC bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+
+description: |
+  ADC is frequently used as a provider to consumers of the ADC channels.
+  Device is a child of an axp209 multifunction device
+  ADC channels and their indexes per variant:
+
+  AXP209
+  ------
+   0 | acin_v
+   1 | acin_i
+   2 | vbus_v
+   3 | vbus_i
+   4 | pmic_temp
+   5 | gpio0_v
+   6 | gpio1_v
+   7 | ipsout_v
+   8 | batt_v
+   9 | batt_chrg_i
+  10 | batt_dischrg_i
+  11 | ts_v
+
+  AXP22x
+  ------
+   0 | pmic_temp
+   1 | batt_v
+   2 | batt_chrg_i
+   3 | batt_dischrg_i
+   4 | ts_v
+
+  AXP813
+  ------
+   0 | pmic_temp
+   1 | gpio0_v
+   2 | batt_v
+   3 | batt_chrg_i
+   4 | batt_dischrg_i
+   5 | ts_v
+
+
+properties:
+  compatible:
+    oneOf:
+      - const: x-powers,axp209-adc
+      - const: x-powers,axp221-adc
+      - const: x-powers,axp813-adc
+
+      - items:
+          - const: x-powers,axp803-adc
+          - const: x-powers,axp813-adc
+
+  "#io-channel-cells":
+    const: 1
+
+additionalProperties: false
+
+examples:
+  - |
+    axp221 {
+        adc {
+            compatible = "x-powers,axp221-adc";
+            #io-channel-cells = <1>;
+        };
+    };
+...