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From: Christian Marangi <ansuelsmth@gmail.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Jiri Slaby" <jirislaby@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	"Benjamin Larsson" <benjamin.larsson@genexis.eu>,
	"John Ogness" <john.ogness@linutronix.de>,
	"Marco Felsch" <m.felsch@pengutronix.de>,
	"Gerhard Engleder" <eg@keba.com>,
	"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	"Binbin Zhou" <zhoubinbin@loongson.cn>,
	"Rong Zhang" <rongrong@oss.cipunited.com>,
	"Lukas Wunner" <lukas@wunner.de>,
	"Lubomir Rintel" <lkundrak@v3.sk>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-serial@vger.kernel.org
Subject: Re: [PATCH 2/4] serial: 8250: export serial8250_get_baud_rate()
Date: Fri, 10 Jul 2026 10:49:27 +0200	[thread overview]
Message-ID: <6a50b219.359f6b3d.bc30a.da0b@mx.google.com> (raw)
In-Reply-To: <alCrYPnk-0FmDnqw@ashevche-desk.local>

On Fri, Jul 10, 2026 at 11:20:48AM +0300, Andy Shevchenko wrote:
> On Thu, Jul 09, 2026 at 11:39:32PM +0200, Christian Marangi wrote:
> > On Fri, Jul 10, 2026 at 12:35:02AM +0300, Andy Shevchenko wrote:
> > > On Thu, Jul 09, 2026 at 10:56:50PM +0200, Christian Marangi wrote:
> > > > Some driver might need to access the current baud rate to correctly
> > > > configure it.
> > > > 
> > > > Export the serial8250_get_baud_rate() function to limit code duplication.
> > > 
> > > Why?
> > > 
> > > We have _get_divisor() / _set_divisor() for exactly that purpose, no?
> > 
> > I can only see set and I'm not following how that helps with any driver
> > that needs to get the baud_rate?
> 
> You operate on the divisor settings instead of baud rate. Otherwise, can
> you elaborate why no other (out of dozens!) driver needs this? What do
> you try to achieve with the baud rate settings exactly?
> 

Ok it wasn't easy to find but you were referring to the .set_divisor and
.get_divisor. Now it's clear. Yes I guess I can use them instead of
exporting this function.

Sorry for the noise and thanks for the suggestion! 

-- 
	Ansuel

  reply	other threads:[~2026-07-10  8:49 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-09 20:56 [PATCH 0/4] serial: 8250: Add AN7581 UART support Christian Marangi
2026-07-09 20:56 ` [PATCH 1/4] dt-bindings: serial: 8250: Add Airoha compatibles Christian Marangi
2026-07-10 16:43   ` Conor Dooley
2026-07-09 20:56 ` [PATCH 2/4] serial: 8250: export serial8250_get_baud_rate() Christian Marangi
2026-07-09 21:35   ` Andy Shevchenko
2026-07-09 21:39     ` Christian Marangi
2026-07-10  8:20       ` Andy Shevchenko
2026-07-10  8:49         ` Christian Marangi [this message]
2026-07-10  9:14           ` Andy Shevchenko
2026-07-10  8:19   ` Ilpo Järvinen
2026-07-09 20:56 ` [PATCH 3/4] serial: 8250: map UAPI port type to internal enum Christian Marangi
2026-07-09 21:18   ` sashiko-bot
2026-07-09 21:37   ` Andy Shevchenko
2026-07-09 21:46     ` Christian Marangi
2026-07-10 10:09       ` Andy Shevchenko
2026-07-09 20:56 ` [PATCH 4/4] serial: 8250: Add Airoha SoC UART and HSUART support Christian Marangi
2026-07-09 21:19   ` sashiko-bot
2026-07-10  7:13   ` Jiri Slaby
2026-07-14 14:55     ` Benjamin Larsson

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