linux-kernel - Re: [RFC PATCH] dt-bindings: nvmem: Introduce nvmem efuse binding for TI K3 SoCs

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Message-ID: <a521de5c-4811-4ea0-bc78-3b69467591d9@ti.com>
Date: Thu, 18 Sep 2025 10:51:31 -0500
From: Judith Mendez <jm@...com>
To: Srinivas Kandagatla <srini@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bryan
 Brattlof <bb@...com>, Andrew Davis <afd@...com>,
        Rob Herring
	<robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Subject: Re: [RFC PATCH] dt-bindings: nvmem: Introduce nvmem efuse binding for
 TI K3 SoCs

Hi Krzysztof,

On 9/16/25 10:48 AM, Judith Mendez wrote:
> On K3 SoCs there are efuse registers scattered across the memory
> map. In order to reference these efuse registers like gp-sw which
> may store SW REV information or other general purpose information
> for drivers to consume, treat them appropriately as efuse devices
> with nvmem framework.
> 
> Signed-off-by: Judith Mendez <jm@...com>
> ---
> This patch is not complete and is sent as an RFC to get some initial
> thoughts on this implementation to solve [0].
> 
> [0] https://lore.kernel.org/linux-mmc/736f09e0-075a-48e0-9b32-6b8805a7ee2a@kernel.org
> ---
>   .../devicetree/bindings/nvmem/ti,efuses.yaml  | 36 +++++++++++++++++++
>   1 file changed, 36 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/nvmem/ti,efuses.yaml
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml b/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml
> new file mode 100644
> index 0000000000000..fffca65cdbfe0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml
> @@ -0,0 +1,36 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/nvmem/ti,efuses.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TI SoC eFuse-based NVMEM
> +
> +maintainers:
> +  - Judith Mendez <jm@...com>
> +
> +allOf:
> +  - $ref: nvmem.yaml#
> +  - $ref: nvmem-deprecated-cells.yaml#
> +
> +properties:
> +  compatible:
> +    - const: ti,am62p-efuse
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    efuse@...00230 {
> +        compatible = "ti,am62p-efuse";
> +        reg = <0x43000230 0x4>;
> +    };
> +
> +...

Ignoring the errors for now, do you think this could be a good solution
to solve [0]?

[0] 
https://lore.kernel.org/linux-mmc/736f09e0-075a-48e0-9b32-6b8805a7ee2a@kernel.org


regards,

~ Judith