linux-kernel - Re: [PATCH v3 54/65] clk: da8xx: clk48: Switch to determine

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Date:   Wed, 5 Apr 2023 17:22:00 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     David Lechner <david@...hnology.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>,
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        Max Filippov <jcmvbkbc@...il.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
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        Maxime Coquelin <mcoquelin.stm32@...il.com>,
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Subject: Re: [PATCH v3 54/65] clk: da8xx: clk48: Switch to determine_rate

Hi David,

On Wed, Apr 05, 2023 at 10:03:24AM -0500, David Lechner wrote:
> On 4/4/23 5:11 AM, Maxime Ripard wrote:
> > The TI DA8xx USB0 clk48 clocks implements a mux with a set_parent
> > hook, but doesn't provide a determine_rate implementation.
> > 
> > This is a bit odd, since set_parent() is there to, as its name implies,
> > change the parent of a clock. However, the most likely candidate to
> > trigger that parent change is a call to clk_set_rate(), with
> > determine_rate() figuring out which parent is the best suited for a
> > given rate.
> > 
> 
> As mentioned in my previous review, parent is selected by device
> tree and should never be changed after init.

Great minds think alike then, because the driver implements exactly
that, either before or after that patch.

That patch makes the current behaviour explicit but doesn't change it in
any way.

So I guess that means that I can add your Acked-by on the three patches
you reviewed with the same message?

Maxime

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