linux-kernel - Re: [PATCH 4/8] tty: atmel_serial: Use devm_clk_get

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Message-ID: <Zsc-ZNg_S8uT9gpR@smile.fi.intel.com>
Date: Thu, 22 Aug 2024 16:34:28 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Richard GENOUD <richard.genoud@...tlin.com>
Cc: Lei Liu <liulei.rjpt@...o.com>, Paul Cercueil <paul@...pouillou.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
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Subject: Re: [PATCH 4/8] tty: atmel_serial: Use devm_clk_get_enabled() helpers

On Thu, Aug 22, 2024 at 03:28:40PM +0200, Richard GENOUD wrote:
> Le 22/08/2024 à 05:39, Lei Liu a écrit :
> > The devm_clk_get_enabled() helpers:
> >      - call devm_clk_get()
> >      - call clk_prepare_enable() and register what is needed in order to
> >       call clk_disable_unprepare() when needed, as a managed resource.
> > 
> > This simplifies the code and avoids calls to clk_disable_unprepare().

...

> >   	 * The peripheral clock can now safely be disabled till the port
> >   	 * is used
> >   	 */
> > -	clk_disable_unprepare(atmel_port->clk);
> > -
> Why removing this ?
> This is not an error path.

Good point, I wouldn't apply this patch as well as a few others in this series
due to this reason.

Instead it might make sense to add a comment on top of devm_clk_get() to
explain why _enabled() variant is *not* used.

-- 
With Best Regards,
Andy Shevchenko