Re: [PATCH v2 1/2] dt-bindings: net/nfc: ti,trf7970a: Add ti,rx-gain-reduction option
From: Andrew Lunn <andrew@lunn.ch>
Date: 2025-06-24 15:49:22
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linux-devicetree, linux-wireless, lkml
On Tue, Jun 24, 2025 at 02:42:46PM +0200, Paul Geurts wrote:
quoted hunk ↗ jump to hunk
Add option to reduce the RX antenna gain to be able to reduce the sensitivity. Signed-off-by: Paul Geurts <redacted> --- 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..066a7abc41e0 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:
You should include the units, "ti,rx-gain-reduction-db"
+ $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Specify a RX gain reduction to reduce antenna sensitivity with 5dB per + increment, with a maximum of 15dB.
Given that description i think you can provide a list of values, [0, 5, 10, 15] and the tools will validate values in .dts files.
quoted hunk ↗ jump to hunk
+ required: - compatible - interrupts@@ -95,5 +101,6 @@ examples: irq-status-read-quirk; en2-rf-quirk; clock-frequency = <27120000>; + ti,rx-gain-reduction = <3>;
Err, how does 3 fit into 5dB increments? Andrew