linux-kernel - Re: [PATCH v2 1/1] serial: core: Start managing serial controllers to enable runtime PM

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Message-ID: <Y3+WiArMrBPTwdaq@smile.fi.intel.com>
Date:   Thu, 24 Nov 2022 18:06:32 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Jiri Slaby <jirislaby@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-serial@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] serial: core: Start managing serial controllers
 to enable runtime PM

On Thu, Nov 24, 2022 at 05:37:07PM +0200, Tony Lindgren wrote:
> * Jiri Slaby <jirislaby@...nel.org> [221124 06:53]:
> > On 27. 06. 22, 15:48, Tony Lindgren wrote:

...

> > And you are objecting that mostly (or in all cases?), there will never be
> > "serial controller 2"?
> 
> I'm was not aware of the need for multiple serial port controllers
> connected to a single hardware controller struct device. Is there an
> example for that somewhere?

I would be on the safest side here by assuming that's possible
(QEMU and FPGA are the first that comes to my mind of such possibilities).

-- 
With Best Regards,
Andy Shevchenko