[PATCH v8 1/6] dt-bindings: iio: filter: Add lpf/hpf freq margins

Sam Winchenbach
2025-03-28T17:49:12Z

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

Signed-off-by: Sam Winchenbach <swinchenbach@arka.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
.../bindings/iio/filter/adi,admv8818.yaml | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
index b77e855bd5946..ff0cb553e8716 100644
--- a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
+++ b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
@@ -44,6 +44,24 @@ properties:
'#clock-cells':
const: 0

+ adi,lpf-margin-mhz:
+ description:
+ Sets the minimum distance between the fundamental frequency of `rf_in`
+ and the corner frequency of the low-pass, output filter when operated 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-mhz:
+ description:
+ Sets the minimum distance between the fundamental frequency of `rf_in`
+ and the corner frequency of the high-pass, input filter when operated 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 +79,8 @@ examples:
spi-max-frequency = <10000000>;
clocks = <&admv8818_rfin>;
clock-names = "rf_in";
+ adi,lpf-margin-mhz = <300>;
+ adi,hpf-margin-mhz = <300>;
};
};
...
--
2.49.0