linux-kernel - [PATCH v2 3/8] dt-bindings: pinctrl: renesas,r9a09g077-pinctrl: Document GPIO IRQ

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Message-ID: <20251205150234.2958140-4-cosmin-gabriel.tanislav.xa@renesas.com>
Date: Fri,  5 Dec 2025 17:02:29 +0200
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Linus Walleij <linusw@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc: linux-renesas-soc@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
Subject: [PATCH v2 3/8] dt-bindings: pinctrl: renesas,r9a09g077-pinctrl: Document GPIO IRQ

The Renesas RZ/T2H (R9A09G077) and Renesas RZ/N2H (R9A09G087) SoCs have
IRQ-capable pins handled by the ICU, which forwards them to the GIC.

The ICU supports 16 IRQ lines, the pins map to these lines arbitrarily,
and the mapping is not configurable.

Document the required properties to handle GPIO IRQ.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
---

V2:
 * drop interrupt-controller and #interrupt-cells from required to keep
   compatibility

 .../bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml
index 36d665971484..f049013a4e0c 100644
--- a/Documentation/devicetree/bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/renesas,r9a09g077-pinctrl.yaml
@@ -49,6 +49,17 @@ properties:
   gpio-ranges:
     maxItems: 1
 
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 2
+    description:
+      The first cell contains the global GPIO port index, constructed using the
+      RZT2H_GPIO() helper macro from <dt-bindings/pinctrl/renesas,r9a09g077-pinctrl.h>
+      and the second cell is used to specify the flag.
+      E.g. "interrupts = <RZT2H_GPIO(8, 6) IRQ_TYPE_EDGE_FALLING>;" if P08_6 is
+      being used as an interrupt.
+
   clocks:
     maxItems: 1
 
@@ -139,6 +150,8 @@ examples:
         gpio-controller;
         #gpio-cells = <2>;
         gpio-ranges = <&pinctrl 0 0 288>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
         power-domains = <&cpg>;
 
         serial0-pins {
-- 
2.52.0