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

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Date:   Wed, 5 Apr 2023 11:07:56 -0500
From:   David Lechner <david@...hnology.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
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Subject: Re: [PATCH v3 54/65] clk: da8xx: clk48: Switch to determine_rate

On 4/5/23 10:22 AM, Maxime Ripard wrote:
> 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

Yes, preferably with a simplified commit message.

Acked-by: David Lechner <david@...hnology.com>