linux-kernel - Re: [PATCH v2 5/7] ASoC: qdsp6: Add depends on OF

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Date:   Mon, 18 Jun 2018 08:48:32 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Niklas Cassel <niklas.cassel@...aro.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Andy Gross <andy.gross@...aro.org>,
        Patrick Lai <plai@...eaurora.org>,
        Banajit Goswami <bgoswami@...eaurora.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/7] ASoC: qdsp6: Add depends on OF

On Mon, Jun 18, 2018 at 6:39 AM, Niklas Cassel <niklas.cassel@...aro.org> wrote:
> On Mon, Jun 18, 2018 at 12:06:42PM +0100, Mark Brown wrote:
>> On Thu, Jun 14, 2018 at 01:11:36PM +0200, Niklas Cassel wrote:
>> > of_platform_device_destroy is only defined when building
>> > with CONFIG_OF=y. Add a depends on OF.
>>
>> Is it sensible that of_platform_device_destroy() is only defined when
>> building with CONFIG_OF=y?
>
> I'm redirecting that question to the device tree maintainers.
>
> There are a few of_* functions in include/linux/of_platform.h
> that are only defined when CONFIG_OF=y:
>
> of_platform_device_create()
> of_platform_device_destroy()
> of_platform_bus_probe()
> of_device_alloc()
>
> Rob, Frank, do you want me to create static inline dummy versions of these?

No, because generally you should not be using these functions
directly. Yes, there are some users, but if you look at the tree,
there are few or isolated (PowerPC) users. Using
of_platform_populate/of_platform_depopulate is preferred.

Rob