dt-bindings: iio: ad74413r: allow setting sink current for digital input

Depending on the actual hardware wired up to a digital input channel, it may be necessary to configure the ad74413r to sink a small current. For example, in the case of a simple mechanical switch, the charge on the external 68 nF capacitor (cf. the data sheet's Figure 34) will keep the channel as reading high even after the switch is turned off again. Signed-off-by: Rasmus Villemoes <[email protected]> Reviewed-by: Krzysztof Kozlowski <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Cameron <[email protected]>
htbegin · Mar 12, 2023 · 954ea91 · 954ea91
1 parent 5418805
commit 954ea91
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml b/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
@@ -101,6 +101,15 @@ patternProperties:
           When not configured as a comparator, the GPO will be treated as an
           output-only GPIO.
 
+      drive-strength-microamp:
+        description: |
+          For channels configured as digital input, this configures the sink
+          current.
+        minimum: 0
+        maximum: 1800
+        default: 0
+        multipleOf: 120
+
     required:
       - reg