netdev - [PATCH v3 1/2] dt-bindings: net/nfc: ti,trf7970a: Add ti,rx-gain-reduction-db option

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Message-ID: <20250626141242.3749958-2-paul.geurts@prodrive-technologies.com>
Date: Thu, 26 Jun 2025 16:12:41 +0200
From: Paul Geurts <paul.geurts@...drive-technologies.com>
To: <mgreer@...malcreek.com>, <krzk@...nel.org>, <andrew+netdev@...n.ch>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <robh@...nel.org>, <conor+dt@...nel.org>,
	<linux-wireless@...r.kernel.org>, <netdev@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <martijn.de.gouw@...drive-technologies.com>, Paul Geurts
	<paul.geurts@...drive-technologies.com>
Subject: [PATCH v3 1/2] dt-bindings: net/nfc: ti,trf7970a: Add ti,rx-gain-reduction-db option

Add option to reduce the RX antenna gain to be able to reduce the
sensitivity.

Signed-off-by: Paul Geurts <paul.geurts@...drive-technologies.com>
---
 Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
index d0332eb76ad2..5f49bd9ac5e6 100644
--- a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
+++ b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
@@ -55,6 +55,12 @@ properties:
     description: |
       Regulator for supply voltage to VIN pin
 
+  ti,rx-gain-reduction-db:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Specify an RX gain reduction to reduce antenna sensitivity with 5dB per
+      increment, with a maximum of 15dB. Supported values: [0, 5, 10, 15].
+
 required:
   - compatible
   - interrupts
@@ -95,5 +101,6 @@ examples:
             irq-status-read-quirk;
             en2-rf-quirk;
             clock-frequency = <27120000>;
+            ti,rx-gain-reduction-db = <15>;
         };
     };
-- 
2.39.2