linux-kernel - Re: [PATCH v3 2/3] clk: divider: Switch from .round_rate to .determine

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Date:   Sat, 3 Jul 2021 00:57:57 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Guenter Roeck <linux@...ck-us.net>, mturquette@...libre.com,
        linux-clk@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>, jbrunet@...libre.com,
        khilman@...libre.com, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 2/3] clk: divider: Switch from .round_rate to
 .determine_rate by default

Hi Stephen,

On Fri, Jul 2, 2021 at 10:59 PM Stephen Boyd <sboyd@...nel.org> wrote:
[...]
> I'd prefer we leave round_rate assigned in clk_divider_ops and
> clk_divider_ro_ops but then also assign the determine_rate function. We
> have some duplication but that's OK. Then make individual patches to
> migrate each driver over to the new clk op.
I just sent a series with those changes: [0]

> We could stack a final patch on top to remove the round_rate function
> from clk divider.  Unfortunately, if some driver wants to use round_rate
> then it will fail in interesting ways. Probably best to live with it
> until we decide to drop round_rate entirely. Patches to convert all the
> round_rate code over to determine_rate would be welcome in the meantime.
For now I have omitted the patch to remove .round_rate from clk_divider_ops.
Also I will start migrating .round_rate over to .determine_rate in
drivers/clk/meson/ (as it's the only hardware with CCF support that I
have).


Best regards,
Martin


[0] https://patchwork.kernel.org/project/linux-clk/cover/20210702225145.2643303-1-martin.blumenstingl@googlemail.com/