dt-bindings: hwmon: add bindings for qcom,amoled-ecm

Qualcomm Technologies, Inc. AMOLED ECM provides a method to measure
OLED display power/current consumption. Add the bindings necessary to
describe it.

This is a snapshot of qcom,amoled-ecm.yaml taken as of qcom-6.1
commit f2d83cefcff8 ("dt-bindings: qcom,amoled-ecm: add
display-panels property").

Change-Id: If2644e7f2a6ee39c7a2c866377012bbb208fd75b
Signed-off-by: David Collins <quic_collinsd@quicinc.com>

bindings/hwmon/qcom,amoled-ecm.yaml

@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/qcom,amoled-ecm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies, Inc. AMOLED ECM binding
+
+maintainers:
+  - David Collins <quic_collinsd@quicinc.com>
+
+description: |
+  Qualcomm Technologies, Inc. AMOLED ECM supports measurement of OLED display
+  power/current consumption with a time granularity of sub-frame or multiple
+  frames of image data. A power measurement can be for a shorter period or for
+  a longer period.
+
+properties:
+  compatible:
+    const: qcom,amoled-ecm
+
+  reg:
+    maxItems: 1
+    description: Base address of the PMIC AMOLED AB module. Registers of AMOLED
+      ECM are part of AMOLED AB module.
+
+  nvmem:
+    minItems: 1
+    items:
+      - description: AMOLED ECM SDAM0 nvmem device phandle
+      - description: AMOLED ECM SDAM1 nvmem device phandle
+      - description: AMOLED ECM SDAM2 nvmem device phandle
+
+  nvmem-names:
+    minItems: 1
+    items:
+      - const: amoled-ecm-sdam0
+      - const: amoled-ecm-sdam1
+      - const: amoled-ecm-sdam2
+
+  interrupts:
+    minItems: 1
+    items:
+      - description: AMOLED ECM SDAM0 nvmem device interrupt
+      - description: AMOLED ECM SDAM1 nvmem device interrupt
+      - description: AMOLED ECM SDAM2 nvmem device interrupt
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: ecm-sdam0
+      - const: ecm-sdam1
+      - const: ecm-sdam2
+
+  display-panels:
+    minItems: 1
+    description: Array of one or more phandles of the display panel(s) that
+      sends the DRM blank/unblank notifications.
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+
+required:
+  - compatible
+  - reg
+  - nvmem
+  - nvmem-names
+  - interrupts
+  - interrupt-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        qcom,amoled-ecm@f900 {
+            compatible = "qcom,amoled-ecm";
+            reg = <0xf900>;
+            nvmem = <&pmk8350_sdam_13>, <&pmk8350_sdam_14>;
+            nvmem-names = "amoled-ecm-sdam0", "amoled-ecm-sdam1";
+            interrupts = <0x0 0x7c 0x1 IRQ_TYPE_EDGE_RISING>,
+                         <0x0 0x7d 0x1 IRQ_TYPE_EDGE_RISING>;
+            interrupt-names = "ecm-sdam0", "ecm-sdam1";
+        };
+    };