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

Commit Message

Neha Malcom Francis May 4, 2023, 8:05 a.m. UTC

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

Signed-off-by: Neha Malcom Francis <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
---
 .../bindings/misc/ti,j721e-esm.yaml           | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/ti,j721e-esm.yaml

Comments

Krzysztof Kozlowski May 4, 2023, 8:11 a.m. UTC | #1

On 04/05/2023 10:05, Neha Malcom Francis wrote:
> Document the binding for TI K3 ESM (Error Signaling Module) block.
> 
> Signed-off-by: Neha Malcom Francis <[e-mail]>
> Reviewed-by: Krzysztof Kozlowski <[e-mail]>

Thanks.

Best regards,
Krzysztof

Nishanth Menon May 4, 2023, 11:51 a.m. UTC | #2

On 10:11-20230504, Krzysztof Kozlowski wrote:
> On 04/05/2023 10:05, Neha Malcom Francis wrote:
> > Document the binding for TI K3 ESM (Error Signaling Module) block.
> > 
> > Signed-off-by: Neha Malcom Francis <[e-mail]>
> > Reviewed-by: Krzysztof Kozlowski <[e-mail]>
> 
To make sure we are'nt stepping on toes:
Krzysztof: is it OK to pick this up via SoC tree?

Krzysztof Kozlowski May 4, 2023, 12:03 p.m. UTC | #3

On 04/05/2023 13:51, Nishanth Menon wrote:
> On 10:11-20230504, Krzysztof Kozlowski wrote:
>> On 04/05/2023 10:05, Neha Malcom Francis wrote:
>>> Document the binding for TI K3 ESM (Error Signaling Module) block.
>>>
>>> Signed-off-by: Neha Malcom Francis <[e-mail]>
>>> Reviewed-by: Krzysztof Kozlowski <[e-mail]>
>>
> To make sure we are'nt stepping on toes:
> Krzysztof: is it OK to pick this up via SoC tree?

Yes, please go ahead.

Best regards,
Krzysztof

Patch

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 <[e-mail]>
+
+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@700000 {
+            compatible = "ti,j721e-esm";
+            reg = <0x0 0x700000 0x0 0x1000>;
+            ti,esm-pins = <344>, <345>;
+        };
+    };