[PATCH v5 1/6] dt-bindings: iio: filter: Add lpf/hpf freq margins

Sam Winchenbach
2025-03-06T18:40:01Z

Adds two properties to add a margin when automatically finding the
corner frequencies.

Signed-off-by: Sam Winchenbach <sam.winchenbach@framepointer.org>
---
.../bindings/iio/filter/adi,admv8818.yaml | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
index b77e855bd594..3f9c61547a78 100644
--- a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
+++ b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
@@ -44,6 +44,27 @@ properties:
'#clock-cells':
const: 0

+
+ adi,lpf-margin-hz:
+ description:
+ Sets the minimum distance (in Hz) between the fundamental
+ frequency of `rf_in` and the corner frequency of the low-pass, output
+ filter when operatred in 'auto' mode. The selected low-pass corner
+ frequency will be greater than, or equal to, `rf_in` + `lpf-margin-hz`. If
+ not setting is found that satisfies this relationship the filter will be
+ put into 'bypass'.
+ default: 0
+
+ adi,hpf-margin-hz:
+ description:
+ Sets the minimum distance (in Hz) between the fundamental
+ frequency of `rf_in` and the corner frequency of the high-pass, input
+ filter when operatred in 'auto' mode. The selected high-pass corner
+ frequency will be less than, or equal to, `rf_in` - `hpf-margin-hz`. If
+ not setting is found that satisfies this relationship the filter will be
+ put into 'bypass'.
+ default: 0
+
required:
- compatible
- reg
@@ -61,6 +82,8 @@ examples:
spi-max-frequency = <10000000>;
clocks = <&admv8818_rfin>;
clock-names = "rf_in";
+ adi,lpf-margin-hz = /bits/ 64 <30000000>;
+ adi,hpf-margin-hz = /bits/ 64 <30000000>;
};
};
...
--
2.48.1