linux-kernel - Re: [PATCH v1 2/2] spi: Populate fwnode in of_register_spi

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Message-ID: <20201105171201.GF4856@sirena.org.uk>
Date:   Thu, 5 Nov 2020 17:12:01 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Cheng-Jui.Wang@...iatek.com, kernel-team@...roid.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        clang-built-linux@...glegroups.com,
        Daniel Mentz <danielmentz@...gle.com>,
        linux-spi@...r.kernel.org
Subject: Re: [PATCH v1 2/2] spi: Populate fwnode in of_register_spi_device()

On Wed, Nov 04, 2020 at 12:54:31PM -0800, Saravana Kannan wrote:
> From: Daniel Mentz <danielmentz@...gle.com>
> 
> This allows the fw_devlink feature to work for spi devices
> too.  This avoids unnecessary probe deferrals related to spi devices and
> improves suspend/resume ordering for spi devices when fw_devlink=on.

>  	of_node_get(nc);
>  	spi->dev.of_node = nc;
> +	spi->dev.fwnode = of_fwnode_handle(nc);

Why is this a manual step in an individual subsystem rather than
something done in the driver core - when would we not want to have the
fwnode correspond to the of_node, and wouldn't that just be a case of
checking to see if there is a fwnode already set and only initializing
if not anyway?

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