linux-kernel - [PATCH v2 1/5] dt-bindings: interrupt-controller: Update STM32 EXTI interrupt controller

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Date:   Wed, 15 Dec 2021 11:58:43 +0100
From:   Alexandre Torgue <alexandre.torgue@...s.st.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, Rob Herring <robh+dt@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>, <alexandre.torgue@...s.st.com>
Subject: [PATCH v2 1/5] dt-bindings: interrupt-controller: Update STM32 EXTI interrupt controller

Document new entry "st,exti-mapping" which links EXTI lines with GIC
interrupt lines and add an include file to define EXTI interrupt type.

Signed-off-by: Alexandre Torgue <alexandre.torgue@...s.st.com>

diff --git a/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml b/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml
index d19c881b4abc..e08bb51e97a8 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/st,stm32-exti.yaml
@@ -41,6 +41,17 @@ properties:
     description:
       Interrupts references to primary interrupt controller
 
+  st,exti-mapping:
+    $ref: "/schemas/types.yaml#/definitions/uint32-matrix"
+    description: |
+            Define mapping between EXTI lines and GIC irq lines. Should be:
+            st,exti-mapping = <EXTI_LINE GIC_IRQ EXTI_TYPE>, ...;
+            With:
+            - EXTI_LINE: EXTI line number.
+            - GIC_IRQ: GIC IRQ associated to the EXTI line.
+            - EXTI_TYPE: STM32_EXTI_TYPE_CONFIGURABLE or STM32_EXTI_TYPE_DIRECT.
+              Defined in include/dt-bindings/interrupt-controller/stm32-exti.h
+
 required:
   - "#interrupt-cells"
   - compatible
diff --git a/include/dt-bindings/interrupt-controller/stm32-exti.h b/include/dt-bindings/interrupt-controller/stm32-exti.h
new file mode 100644
index 000000000000..02b7e0e30cf7
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/stm32-exti.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_STM32_EXTI_H
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_STM32_EXTI_H
+
+#define STM32_EXTI_TYPE_CONFIGURABLE	0
+#define STM32_EXTI_TYPE_DIRECT		1
+
+#define STM32_EXTI_MAPPING_CELL_NB	3
+
+#endif
-- 
2.17.1