linux-kernel - Re: [PATCH v7 3/9] software node: allow referencing firmware nodes

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Message-ID: <aR8XMrLQWsmcrzY3@opensource.cirrus.com>
Date: Thu, 20 Nov 2025 13:27:14 +0000
From: Charles Keepax <ckeepax@...nsource.cirrus.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Danilo Krummrich <dakr@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        David Rhodes <david.rhodes@...rus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        Mark Brown <broonie@...nel.org>,
        Maciej Strozek <mstrozek@...nsource.cirrus.com>,
        Andy Shevchenko <andy@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-sound@...r.kernel.org, patches@...nsource.cirrus.com,
        linux-spi@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v7 3/9] software node: allow referencing firmware nodes

On Thu, Nov 20, 2025 at 02:23:58PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> At the moment software nodes can only reference other software nodes.
> This is a limitation for devices created, for instance, on the auxiliary
> bus with a dynamic software node attached which cannot reference devices
> the firmware node of which is "real" (as an OF node or otherwise).
> 
> Make it possible for a software node to reference all firmware nodes in
> addition to static software nodes. To that end: add a second pointer to
> struct software_node_ref_args of type struct fwnode_handle. The core
> swnode code will first check the swnode pointer and if it's NULL, it
> will assume the fwnode pointer should be set.
> 
> Software node graphs remain the same, as in: the remote endpoints still
> have to be software nodes.
> 
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
> Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---

Reviewed-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
Tested-by: Charles Keepax <ckeepax@...nsource.cirrus.com>

Thanks,
Charles