linux-kernel - [PATCH v4 2/2] dt-bindings: iio: filter: Add lpf/hpf freq margins

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Message-ID: <20250225134612.577022-2-sam.winchenbach@framepointer.org>
Date: Tue, 25 Feb 2025 08:46:12 -0500
From: Sam Winchenbach <sam.winchenbach@...mepointer.org>
To: linux-kernel@...r.kernel.org
Cc: lars@...afoo.de,
	Michael.Hennerich@...log.com,
	antoniu.miclaus@...log.com,
	jic23@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	sam.winchenbach@...mepointer.org
Subject: [PATCH v4 2/2] dt-bindings: iio: filter: Add lpf/hpf freq margins

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

Signed-off-by: Sam Winchenbach <sam.winchenbach@...mepointer.org>
---
 .../bindings/iio/filter/adi,admv8818.yaml          | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
index b77e855bd594..2acdbd8d84cb 100644
--- a/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
+++ b/Documentation/devicetree/bindings/iio/filter/adi,admv8818.yaml
@@ -44,6 +44,18 @@ properties:
   '#clock-cells':
     const: 0
 
+  adi,lpf-margin-hz:
+    description:
+      Sets minimum low-pass corner frequency to the frequency of rf_in plus
+      this value when in auto mode.
+    default: 0
+
+  adi,hpf-margin-hz:
+    description:
+      Sets maximum high-pass corner frequency to the frequency of rf_in minus
+      this value when in auto mode.
+    default: 0
+
 required:
   - compatible
   - reg
@@ -61,6 +73,8 @@ 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