[PATCH v2 1/3] dt-bindings: iio: health: add maxim,max86150

[Md Shofiqul Islam <shofiqtest@gmail.com>]

Add YAML schema binding for the Maxim MAX86150 combined ECG and PPG
biosensor.  The device communicates over I2C at up to 400 kHz and
exposes an active-low interrupt when the 32-entry hardware FIFO
reaches its configurable almost-full threshold.

Signed-off-by: Md Shofiqul Islam <shofiqtest@gmail.com>
---
 .../bindings/iio/health/maxim,max86150.yaml   | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100755 Documentation/devicetree/bindings/iio/health/maxim,max86150.yaml

diff --git a/Documentation/devicetree/bindings/iio/health/maxim,max86150.yaml b/Documentation/devicetree/bindings/iio/health/maxim,max86150.yaml
new file mode 100755
index 000000000000..1bf10fd1a3d2
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/health/maxim,max86150.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/health/maxim,max86150.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX86150 ECG and PPG Biosensor
+
+maintainers:
+  - Md Shofiqul Islam <shofiqtest@gmail.com>
+
+description: |
+  The MAX86150 is an integrated biosensor SoC that combines:
+    - Two PPG (photoplethysmography) channels: Red LED and IR LED,
+      for heart rate and blood-oxygen saturation (SpO2) measurement.
+    - One ECG (electrocardiogram) channel for biopotential recording.
+
+  The device communicates over I2C at up to 400 kHz and raises an
+  active-low interrupt when the 32-entry hardware FIFO reaches its
+  configurable almost-full threshold.
+
+  Datasheet:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/MAX86150.pdf
+
+properties:
+  compatible:
+    const: maxim,max86150
+
+  reg:
+    maxItems: 1
+    description: I2C device address, always 0x5E.
+
+  interrupts:
+    maxItems: 1
+    description: |
+      Active-low interrupt line.  Asserted when the FIFO almost-full
+      threshold is reached or when a new PPG sample is ready.
+
+  vdd-supply:
+    description: Digital core supply, 1.71 V to 1.89 V.
+
+  leds-supply:
+    description: LED anode supply, 3.0 V to 5.5 V.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        biosensor@5e {
+            compatible = "maxim,max86150";
+            reg = <0x5e>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+            vdd-supply = <&vdd_1v8>;
+            leds-supply = <&vdd_3v3>;
+        };
+    };
-- 
2.51.1