[PATCH 1/2] dt-bindings: iio: max30100: Add pulse-width property

[Shrikant Raskar <raskar.shree97@gmail.com>]

The MAX30100 sensor supports multiple LED pulse widths (200us, 400us,
800us, 1600us). These settings affect measurement resolution and power
consumption. Until now, the driver always defaulted to 1600us.

Introduce a new device tree property `maxim,pulse-width` that allows
users to select the desired pulse width in microseconds from device
tree.

Valid values are: 200, 400, 800, 1600.

This prepares for driver changes that read this property and configure
the SPO2 register accordingly.

Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.com>
---
 .../devicetree/bindings/iio/health/maxim,max30100.yaml      | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/health/maxim,max30100.yaml b/Documentation/devicetree/bindings/iio/health/maxim,max30100.yaml
index 967778fb0ce8..55aaf2ff919b 100644
--- a/Documentation/devicetree/bindings/iio/health/maxim,max30100.yaml
+++ b/Documentation/devicetree/bindings/iio/health/maxim,max30100.yaml
@@ -27,6 +27,11 @@ properties:
       LED current whilst the engine is running. First indexed value is
       the configuration for the RED LED, and second value is for the IR LED.
 
+  maxim,pulse-width:
+    maxItems: 1
+    description: Pulse width in microseconds
+    enum: [200, 400, 800, 1600]
+
 additionalProperties: false
 
 required:
@@ -44,6 +49,7 @@ examples:
             compatible = "maxim,max30100";
             reg = <0x57>;
             maxim,led-current-microamp = <24000 50000>;
+            maxim,pulse-width = <1600>;
             interrupt-parent = <&gpio1>;
             interrupts = <16 2>;
         };
-- 
2.43.0