linux-kernel - RE: [PATCH v1 tty-next 2/2] 8250: microchip: pci1xxxx: Add power management functions to pci1xxxx's quad-uart driver.

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Date:   Thu, 29 Sep 2022 09:34:08 +0000
From:   <Kumaravel.Thiagarajan@...rochip.com>
To:     <andy.shevchenko@...il.com>
CC:     <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>,
        <ilpo.jarvinen@...ux.intel.com>, <u.kleine-koenig@...gutronix.de>,
        <johan@...nel.org>, <wander@...hat.com>,
        <etremblay@...tech-controls.com>, <macro@...am.me.uk>,
        <geert+renesas@...der.be>, <jk@...abs.org>,
        <phil.edworthy@...esas.com>, <lukas@...ner.de>,
        <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
        <UNGLinuxDriver@...rochip.com>
Subject: RE: [PATCH v1 tty-next 2/2] 8250: microchip: pci1xxxx: Add power
 management functions to pci1xxxx's quad-uart driver.

> -----Original Message-----
> From: Kumaravel Thiagarajan - I21417
> <Kumaravel.Thiagarajan@...rochip.com>
> Sent: Thursday, September 1, 2022 7:19 PM
> To: Andy Shevchenko <andy.shevchenko@...il.com>
> 
> > -----Original Message-----
> > From: Andy Shevchenko <andy.shevchenko@...il.com>
> > Sent: Wednesday, August 31, 2022 1:26 AM
> > To: Kumaravel Thiagarajan - I21417
> > <Kumaravel.Thiagarajan@...rochip.com>
> >
> >
> > On Tue, Aug 30, 2022 at 9:01 PM Kumaravel Thiagarajan
> > <kumaravel.thiagarajan@...rochip.com> wrote:
> > >
> > > pci1xxxx's quad-uart function has the capability to wake up the host
> > > from suspend state. Enable wakeup before entering into suspend and
> > > disable wakeup upon resume.
> >
> > on resume
> Ok. I will modify this.
> 
> >
> > ...
> >
> > First of all, we have pm_ptr() and pm_sleep_ptr() with corresponding
> > other macros in pm.h. Use them.
> > Second, if you need to duplicate a lot of code from 8250_pci, split
> > that code to 8250_pcilib.c and use it in the driver.
> Ok. I will review and get back to you.
Andy, I was able to start on the v2 for the patch only a few days ago and about to complete it now.
I have absorbed most of the changes suggested whereas for the above change I felt it may not be
required to split 8250_pci.c at least now as there is only one function setup_port which I have
duplicated in 8250_pci1xxxx.c. Please let me know your thoughts.
I will submit the v2 patch for review soon.

Thank You.

Regards,
Kumar