linux-kernel - Re: [PATCH 3/4] dt-bindings: misc: tmr-inject: Add device-tree binding for TMR Inject

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Date:   Wed, 29 Jun 2022 12:08:37 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        michal.simek@...inx.com, derek.kiernan@...inx.com,
        dragan.cvetic@...inx.com, arnd@...db.de,
        gregkh@...uxfoundation.org, linux-arm-kernel@...ts.infradead.org
Cc:     git@....com, git@...inx.com
Subject: Re: [PATCH 3/4] dt-bindings: misc: tmr-inject: Add device-tree
 binding for TMR Inject

On 28/06/2022 07:43, Appana Durga Kedareswara rao wrote:
> This commit adds documentation for Triple Modular Redundancy (TMR)

No "This commit"

https://elixir.bootlin.com/linux/v5.17.1/source/Documentation/process/submitting-patches.rst#L95

> Inject IP.
> 
> Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>
> ---
>  .../bindings/misc/xlnx,tmr-inject.yaml        | 47 +++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/misc/xlnx,tmr-inject.yaml
> 
> diff --git a/Documentation/devicetree/bindings/misc/xlnx,tmr-inject.yaml b/Documentation/devicetree/bindings/misc/xlnx,tmr-inject.yaml
> new file mode 100644
> index 000000000000..4daf9539000b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/xlnx,tmr-inject.yaml
> @@ -0,0 +1,47 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/misc/xlnx,tmr-inject.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx TMR Inject Device Tree Bindings

Same comments.

> +
> +maintainers:
> +  - Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>
> +
> +description: |
> +  The Triple Modular Redundancy(TMR) Inject core provides functional fault
> +  injection by changing selected MicroBlaze instructions, which provides the
> +  possibility to verify that the TMR subsystem error detection and fault
> +  recovery logic is working properly.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - xlnx,tmr-inject-1.0
> +
> +  reg:
> +    maxItems: 1
> +
> +  xlnx,magic:
> +    minimum: 0
> +    maximum: 255
> +    description: |
> +      Magic number used when injecting faults. The fault inject write data least
> +      significant byte (bits 7:0) must match this number to have any effect.

And why exactly register value is a property of DT?

> +    $ref: /schemas/types.yaml#/definitions/uint32
> +
> +required:
> +  - compatible
> +  - reg
> +  - xlnx,magic
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    tmr-inject@...30000 {

fault-inject?

> +            compatible = "xlnx,tmr-inject-1.0";
> +            reg = <0x44a10000 0x10000>;
> +            xlnx,magic = <0x46>;
> +    };


Best regards,
Krzysztof