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

[Krzysztof Kozlowski]

On 14/04/2023 12:52, Neha Malcom Francis wrote:
> Document the binding for TI K3 ESM (Error Signaling Module) block.
> 
> Signed-off-by: Neha Malcom Francis <n-francis@xxxxxx>
> ---
>  .../devicetree/bindings/misc/esm-k3.yaml      | 54 +++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/misc/esm-k3.yaml
> 
> diff --git a/Documentation/devicetree/bindings/misc/esm-k3.yaml b/Documentation/devicetree/bindings/misc/esm-k3.yaml
> new file mode 100644
> index 000000000000..5e637add3b0e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/esm-k3.yaml

Filename matching compatible. Missing vendor prefix and device name.

> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/misc/esm-k3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments K3 ESM Binding

Drop: Binding

> +
> +maintainers:
> +  - Neha Malcom Francis <n-francis@xxxxxx>
> +
> +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 handld by the ESM, which routes them to the proper

typo: handled

> +  destination, which can be system reset, interrupt controller, etc. In the
> +  simplest configuration the signals are just routed to reset the SoC.

There is no proper bindings directory for ESM? Misc is discouraged.

> +
> +properties:
> +  compatible:
> +    const: ti,j721e-esm
> +
> +  reg:
> +    items:
> +      - description: physical address and length of the registers which
> +          contain revision and debug features

Drop useless "physical address and length of the registers which". reg
cannot be anything else.

> +      - description: physical address and length of the registers which
> +          indicate strapping options
> +
> +  ti,esm-pins:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    description: |

Do not need '|' unless you need to preserve formatting.

> +      integer array of ESM event IDs to route to external event pin which can
> +      be used to reset the SoC. The array can have an arbitrary amount of event
> +      IDs listed on it.

What is ESM event ID? The property name suggests pins...


> +    minItems: 1
> +    maxItems: 255
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - ti,esm-pins
> +
> +examples:
> +  - |
> +    main_esm: esm@700000 {

Drop label.

> +        compatible = "ti,j721e-esm";
> +        reg = <0x0 0x700000 0x0 0x1000>;
> +        ti,esm-pins = <344>, <345>;
> +    };

Best regards,
Krzysztof