linux-kernel - Re: [PATCH net-next v2 4/4] net: pse-pd: pd692x0: Add devlink interface for configuration save/reset

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Message-ID: <20250901133100.3108c817@kernel.org>
Date: Mon, 1 Sep 2025 13:31:00 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Kory Maincent <kory.maincent@...tlin.com>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>, Andrew Lunn
 <andrew+netdev@...n.ch>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Jiri Pirko
 <jiri@...nulli.us>, Simon Horman <horms@...nel.org>, Jonathan Corbet
 <corbet@....net>, kernel@...gutronix.de, Dent Project
 <dentproject@...uxfoundation.org>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, Maxime Chevallier
 <maxime.chevallier@...tlin.com>, linux-doc@...r.kernel.org
Subject: Re: [PATCH net-next v2 4/4] net: pse-pd: pd692x0: Add devlink
 interface for configuration save/reset

On Fri, 29 Aug 2025 18:28:46 +0200 Kory Maincent wrote:
> +The ``PD692x0`` drivers implement the following driver-specific parameters.
> +
> +.. list-table:: Driver-specific parameters implemented
> +   :widths: 5 5 5 85
> +
> +   * - Name
> +     - Type
> +     - Mode
> +     - Description
> +   * - ``save_conf``
> +     - bool
> +     - runtime
> +     - Save the current configuration to non-volatile memory using ``1``
> +       attribute value.
> +   * - ``reset_conf``
> +     - bool
> +     - runtime
> +     - Reset the current and saved configuration using ``1`` attribute
> +       value.

Sorry for not offering a clear alternative, but I'm not aware of any
precedent for treating devlink params as action triggers. devlink params
should be values that can be set and read, which is clearly not
the case here:

> +static int pd692x0_dl_dummy_get(struct devlink *devlink, u32 id,
> +				struct devlink_param_gset_ctx *ctx)
> +{
> +	return 0;
> +}
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