linux-kernel - [PATCH 1/2] dt-bindings: mchp-eic: add bindings

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Message-ID: <20210302102846.619980-2-claudiu.beznea@microchip.com>
Date:   Tue, 2 Mar 2021 12:28:45 +0200
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <tglx@...utronix.de>, <maz@...nel.org>, <robh+dt@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <nicolas.ferre@...rochip.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH 1/2] dt-bindings: mchp-eic: add bindings

Add DT bindings for Microchip External Interrupt Controller.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 .../interrupt-controller/mchp,eic.yaml        | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/mchp,eic.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/mchp,eic.yaml b/Documentation/devicetree/bindings/interrupt-controller/mchp,eic.yaml
new file mode 100644
index 000000000000..5a927817aa7d
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/mchp,eic.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/mchp,eic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip External Interrupt Controller
+
+maintainers:
+  - Claudiu Beznea <claudiu.beznea@...rochip.com>
+
+description:
+  This interrupt controller is found in Microchip SoCs (SAMA7G5) and provides
+  support for handling up to 2 external interrupt lines.
+
+properties:
+  compatible:
+    enum:
+      - microchip,sama7g5-eic
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 3
+    description:
+      The first cell is the input IRQ number (between 0 and 1), the second cell
+      is the trigger type as defined in interrupt.txt present in this directory
+      and the third cell is the glitch filter (1, 2, 4, 8) in clock cycles
+
+  'interrupts':
+    description: |
+      Contains the GIC SPI IRQs mapped to the external interrupt lines. They
+      should be specified sequentially from output 0 to output 1.
+    minItems: 2
+    maxItems: 2
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: pclk
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - 'interrupts'
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/at91.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    eic: eic@...28000 {
+      compatible = "microchip,sama7g5-eic";
+      reg = <0xe1628000 0x100>;
+      interrupt-parent = <&gic>;
+      interrupt-controller;
+      #interrupt-cells = <3>;
+      interrupts = <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&pmc PMC_TYPE_PERIPHERAL 37>;
+      clock-names = "pclk";
+    };
+
+...
-- 
2.25.1