diff mbox series

[v2,4/6] dt-bindings: iio: ad7949: Add cfg-readback option

Message ID 1556813672-49861-4-git-send-email-adam.michaelis@rockwellcollins.com
State New, archived
Headers show
Series [v2,1/6] iio: ad7949: Support internal Vref | expand

Commit Message

Adam Michaelis May 2, 2019, 4:14 p.m. UTC
Adding optional parameter to the ad7949 to indicate that the part should
be configured to include the configuration register value used when
acquiring the current sample value.

Signed-off-by: Adam Michaelis <adam.michaelis@rockwellcollins.com>
---
	V2: Add some defines to reduce use of magic numbers.
---
 Documentation/devicetree/bindings/iio/adc/ad7949.txt | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
index 14ee9a2cb2a5..cd3572828243 100644
--- a/Documentation/devicetree/bindings/iio/adc/ad7949.txt
+++ b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
@@ -18,6 +18,8 @@  Optional properties:
    7: External reference, temperature sensor disabled, buffer enabled
  - vref-supply: The regulator supply for ADC reference voltage. Required
  if external reference selected by 'adi,reference-select'.
+ - adi,cfg-readback: If defined, set bit in configuration register to
+ read-back the configuration used for the current sample value.
 
 Examples:
 adc@0 {
@@ -32,3 +34,10 @@  adc@0 {
 	reg = <0>;
 	adi,reference-select = <0>;
 };
+
+adc@0 {
+	compatible = "adi,ad7949";
+	reg = <0>;
+	adi,reference-select = <1>;
+	adi,cfg-readback;
+};