linux-kernel - Re: [PATCH v2 00/65] clk: Make determine

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Message-ID: <20230322100153.gzyznaukbdngcvko@houat>
Date:   Wed, 22 Mar 2023 11:01:53 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Abel Vesa <abelvesa@...nel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
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Subject: Re: [PATCH v2 00/65] clk: Make determine_rate mandatory for muxes

Hi Stephen,

On Tue, Mar 21, 2023 at 04:55:03PM -0700, Stephen Boyd wrote:
> Quoting Maxime Ripard (2022-11-04 06:17:17)
> > Hi,
> > 
> > This is a follow-up to a previous series that was printing a warning
> > when a mux has a set_parent implementation but is missing
> > determine_rate().
> > 
> > The rationale is that set_parent() is very likely to be useful when
> > changing the rate, but it's determine_rate() that takes the parenting
> > decision. If we're missing it, then the current parent is always going
> > to be used, and thus set_parent() will not be used. The only exception
> > being a direct call to clk_set_parent(), but those are fairly rare
> > compared to clk_set_rate().
> > 
> > Stephen then asked to promote the warning to an error, and to fix up all
> > the muxes that are in that situation first. So here it is :)
> > 
> > Let me know what you think,
> 
> What's the plan here? Are you going to resend?

It wasn't clear to me whether or not this was something that you wanted,
and I got some pushback on the drivers so I kind of forgot about it.

If you do want it (and it looks like you do), I'll resend it.

Maxime

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