netdev - [PATCH net-next v6 12/12] dt-bindings: net: pse-pd: ti,tps23881: Add interrupt description

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Message-Id: <20250304-feature_poe_port_prio-v6-12-3dc0c5ebaf32@bootlin.com>
Date: Tue, 04 Mar 2025 11:19:01 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>, Oleksij Rempel <o.rempel@...gutronix.de>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Jonathan Corbet <corbet@....net>, Donald Hunter <donald.hunter@...il.com>, 
 Rob Herring <robh@...nel.org>, Andrew Lunn <andrew+netdev@...n.ch>, 
 Simon Horman <horms@...nel.org>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
 linux-doc@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>, 
 Dent Project <dentproject@...uxfoundation.org>, kernel@...gutronix.de, 
 Maxime Chevallier <maxime.chevallier@...tlin.com>, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Kory Maincent (Dent Project)" <kory.maincent@...tlin.com>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH net-next v6 12/12] dt-bindings: net: pse-pd: ti,tps23881:
 Add interrupt description

From: Kory Maincent (Dent Project) <kory.maincent@...tlin.com>

Add an interrupt property to the device tree bindings for the TI TPS23881
PSE controller. The interrupt is primarily used to detect classification
and disconnection events, which are essential for managing the PSE
controller in compliance with the PoE standard.

Interrupt support is essential for the proper functioning of the TPS23881
controller. Without it, after a power-on (PWON), the controller will
no longer perform detection and classification. This could lead to
potential hazards, such as connecting a non-PoE device after a PoE device,
which might result in magic smoke.

Signed-off-by: Kory Maincent (Dent Project) <kory.maincent@...tlin.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---

Change in v5:
- Use standard interrupt flag in the example.

Change in v3:
- New patch
---
 Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml b/Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml
index d08abcb012113..3a5f960d8489a 100644
--- a/Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml
+++ b/Documentation/devicetree/bindings/net/pse-pd/ti,tps23881.yaml
@@ -20,6 +20,9 @@ properties:
   reg:
     maxItems: 1

+  interrupts:
+    maxItems: 1
+
   '#pse-cells':
     const: 1

@@ -62,9 +65,12 @@ unevaluatedProperties: false
 required:
   - compatible
   - reg
+  - interrupts

 examples:
   - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
     i2c {
       #address-cells = <1>;
       #size-cells = <0>;
@@ -72,6 +78,8 @@ examples:
       ethernet-pse@20 {
         compatible = "ti,tps23881";
         reg = <0x20>;
+        interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-parent = <&gpiog>;

         channels {
           #address-cells = <1>;

-- 
2.34.1