linux-kernel - Re: [PATCH v1] clk: Mark a fwnode as initialized when using CLK_OF

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Message-ID: <CAGETcx-t=SHPtNifpF35XTMEZk9b0gySr+J9AfcgHvVfBEEWtw@mail.gmail.com>
Date:   Wed, 1 Mar 2023 12:45:27 -0800
From:   Saravana Kannan <saravanak@...gle.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Michael Turquette <mturquette@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        kernel-team@...roid.com, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] clk: Mark a fwnode as initialized when using
 CLK_OF_DECLARE* macros

On Wed, Mar 1, 2023 at 12:40 PM Stephen Boyd <sboyd@...nel.org> wrote:
>
> Quoting Saravana Kannan (2023-02-28 17:25:06)
> > The CLK_OF_DECLARE macros sometimes prevent the creation of struct
> > devices for the device node being handled. It does this by
> > setting/clearing OF_POPULATED flag. This can block the probing of some
> > devices because fw_devlink will block the consumers of this node till a
> > struct device is created and probed.
>
> Why can't you use CLK_OF_DECLARE_DRIVER()?

Not sure if you looked at the patch. This is a fix for the macros, not
this specific user of CLK_OF_DECLARE(). Even if Linus fixes his
specific case, this change is still needed for other users of
CLK_OF_DECLARE().

Honestly, a ton of existing CLK_OF_DECLARE() users should really be
switching to CLK_OF_DECLARE_DRIVER() or better yet, implement them as
normal platform drivers when the specific clock control doesn't
provide any early clocks.

-Saravana