linux-kernel - [PATCH v6 1/3] dt-bindings: misc: esm: Add ESM support for TI K3 devices

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Message-ID: <20230504080526.133149-2-n-francis@ti.com>
Date:   Thu, 4 May 2023 13:35:24 +0530
From:   Neha Malcom Francis <n-francis@...com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <n-francis@...com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <u-kumar1@...com>
Subject: [PATCH v6 1/3] dt-bindings: misc: esm: Add ESM support for TI K3 devices

Document the binding for TI K3 ESM (Error Signaling Module) block.

Signed-off-by: Neha Malcom Francis <n-francis@...com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 .../bindings/misc/ti,j721e-esm.yaml           | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/ti,j721e-esm.yaml

diff --git a/Documentation/devicetree/bindings/misc/ti,j721e-esm.yaml b/Documentation/devicetree/bindings/misc/ti,j721e-esm.yaml
new file mode 100644
index 000000000000..0c9a8444844c
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/ti,j721e-esm.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Texas Instruments Incorporated
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/misc/ti,j721e-esm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 ESM
+
+maintainers:
+  - Neha Malcom Francis <n-francis@...com>
+
+description:
+  The ESM (Error Signaling Module) is an IP block on TI K3 devices
+  that allows handling of safety events somewhat similar to what interrupt
+  controller would do. The safety signals have their separate paths within
+  the SoC, and they are handled by the ESM, which routes them to the proper
+  destination, which can be system reset, interrupt controller, etc. In the
+  simplest configuration the signals are just routed to reset the SoC.
+
+properties:
+  compatible:
+    const: ti,j721e-esm
+
+  reg:
+    maxItems: 1
+
+  ti,esm-pins:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      integer array of ESM interrupt pins to route to external event pin
+      which can be used to reset the SoC.
+    minItems: 1
+    maxItems: 255
+
+required:
+  - compatible
+  - reg
+  - ti,esm-pins
+
+additionalProperties: false
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+        esm@...000 {
+            compatible = "ti,j721e-esm";
+            reg = <0x0 0x700000 0x0 0x1000>;
+            ti,esm-pins = <344>, <345>;
+        };
+    };
-- 
2.34.1