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Message-ID: <174401178571.31282.13288482181779829610.tip-bot2@tip-bot2>
Date: Mon, 07 Apr 2025 07:43:05 -0000
From: "tip-bot2 for Caleb James DeLisle" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Caleb James DeLisle <cjd@...ns.fr>, Thomas Gleixner <tglx@...utronix.de>,
"Rob Herring (Arm)" <robh@...nel.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: irq/drivers] dt-bindings: interrupt-controller: Add EcoNet
EN751221 INTC
The following commit has been merged into the irq/drivers branch of tip:
Commit-ID: 9773c540441c6ae15aefb49e67142e94369dbbc0
Gitweb: https://git.kernel.org/tip/9773c540441c6ae15aefb49e67142e94369dbbc0
Author: Caleb James DeLisle <cjd@...ns.fr>
AuthorDate: Sun, 30 Mar 2025 17:02:58
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 07 Apr 2025 09:39:38 +02:00
dt-bindings: interrupt-controller: Add EcoNet EN751221 INTC
Document the device tree binding for the interrupt controller in the
EcoNet EN751221 MIPS SoC.
Signed-off-by: Caleb James DeLisle <cjd@...ns.fr>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Link: https://lore.kernel.org/all/20250330170306.2584136-3-cjd@cjdns.fr
---
Documentation/devicetree/bindings/interrupt-controller/econet,en751221-intc.yaml | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 78 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/econet,en751221-intc.yaml
diff --git a/Documentation/devicetree/bindings/interrupt-controller/econet,en751221-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/econet,en751221-intc.yaml
new file mode 100644
index 0000000..5536319
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/econet,en751221-intc.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/econet,en751221-intc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: EcoNet EN751221 Interrupt Controller
+
+maintainers:
+ - Caleb James DeLisle <cjd@...ns.fr>
+
+description:
+ The EcoNet EN751221 Interrupt Controller is a simple interrupt controller
+ designed for the MIPS 34Kc MT SMP processor with 2 VPEs. Each interrupt can
+ be routed to either VPE but not both, so to support per-CPU interrupts, a
+ secondary IRQ number is allocated to control masking/unmasking on VPE#1. For
+ lack of a better term we call these "shadow interrupts". The assignment of
+ shadow interrupts is defined by the SoC integrator when wiring the interrupt
+ lines, so they are configurable in the device tree.
+
+allOf:
+ - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+ compatible:
+ const: econet,en751221-intc
+
+ reg:
+ maxItems: 1
+
+ "#interrupt-cells":
+ const: 1
+
+ interrupt-controller: true
+
+ interrupts:
+ maxItems: 1
+ description: Interrupt line connecting this controller to its parent.
+
+ econet,shadow-interrupts:
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ description:
+ An array of interrupt number pairs where each pair represents a shadow
+ interrupt relationship. The first number in each pair is the primary IRQ,
+ and the second is its shadow IRQ used for VPE#1 control. For example,
+ <8 3> means IRQ 8 is shadowed by IRQ 3, so IRQ 3 cannot be mapped, but
+ when VPE#1 requests IRQ 8, it will manipulate the IRQ 3 mask bit.
+ minItems: 1
+ maxItems: 20
+ items:
+ items:
+ - description: primary per-CPU IRQ
+ - description: shadow IRQ number
+
+required:
+ - compatible
+ - reg
+ - interrupt-controller
+ - "#interrupt-cells"
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ interrupt-controller@...40000 {
+ compatible = "econet,en751221-intc";
+ reg = <0x1fb40000 0x100>;
+
+ interrupt-controller;
+ #interrupt-cells = <1>;
+
+ interrupt-parent = <&cpuintc>;
+ interrupts = <2>;
+
+ econet,shadow-interrupts = <7 2>, <8 3>, <13 12>, <30 29>;
+ };
+...
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