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From:   =?iso-8859-1?Q?M=E5ns_Rullg=E5rd?= <mans@mansr.com>
To:     Samuel Holland <samuel@sholland.org>
Cc:     Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        linux-sunxi@lists.linux.dev,
        Michael Turquette <mturquette@baylibre.com>,
        linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        Stephen Boyd <sboyd@kernel.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/4] clk: sunxi-ng: Convert early providers to
 platform drivers
References: <20211119033338.25486-1-samuel@sholland.org>
        <20211119033338.25486-4-samuel@sholland.org>
Date:   Mon, 26 Jun 2023 13:21:33 +0100
In-Reply-To: <20211119033338.25486-4-samuel@sholland.org> (Samuel Holland's
        message of "Thu, 18 Nov 2021 21:33:36 -0600")
Message-ID: <yw1xedly2z3m.fsf@mansr.com>
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Samuel Holland <samuel@sholland.org> writes:

> The PRCM CCU drivers depend on clocks provided by other CCU drivers. For
> example, the sun8i-r-ccu driver uses the "pll-periph" clock provided by
> the SoC's main CCU.
>
> However, sun8i-r-ccu is an early OF clock provider, and many of the
> main CCUs (e.g. sun50i-a64-ccu) use platform drivers. This means that
> the consumer clocks will be orphaned until the supplier driver is bound.
> This can be avoided by converting the remaining CCUs to use platform
> drivers. Then fw_devlink will ensure the drivers are bound in the
> optimal order.
>
> The sun5i CCU is the only one which actually needs to be an early clock
> provider, because it provides the clock for the system timer. That one
> is left alone.
>
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
>
> (no changes since v1)
>
>  drivers/clk/sunxi-ng/Kconfig             | 20 ++++----
>  drivers/clk/sunxi-ng/ccu-sun4i-a10.c     | 58 +++++++++++++--------
>  drivers/clk/sunxi-ng/ccu-sun50i-h6-r.c   | 56 ++++++++++++--------
>  drivers/clk/sunxi-ng/ccu-sun50i-h616.c   | 33 ++++++++----
>  drivers/clk/sunxi-ng/ccu-sun6i-a31.c     | 40 +++++++++++----
>  drivers/clk/sunxi-ng/ccu-sun8i-a23.c     | 35 +++++++++----
>  drivers/clk/sunxi-ng/ccu-sun8i-a33.c     | 40 +++++++++++----
>  drivers/clk/sunxi-ng/ccu-sun8i-h3.c      | 62 ++++++++++++++--------
>  drivers/clk/sunxi-ng/ccu-sun8i-r.c       | 65 ++++++++++++++----------
>  drivers/clk/sunxi-ng/ccu-sun8i-v3s.c     | 57 +++++++++++++--------
>  drivers/clk/sunxi-ng/ccu-suniv-f1c100s.c | 38 ++++++++++----
>  11 files changed, 332 insertions(+), 172 deletions(-)

This broke the hstimer clocksource on A20 since it requires a clock
provided by the sun4i ccu driver.

-- 
M?ns Rullg?rd