linux-kernel - Re: [PATCH] serial: 8250: Add support for using platform

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Date:   Tue, 07 May 2019 13:35:58 +0200
From:   Esben Haabendal <esben@...bendal.dk>
To:     Lee Jones <lee.jones@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-serial@...r.kernel.org, Enrico Weigelt <lkml@...ux.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Darwin Dingel <darwin.dingel@...iedtelesis.co.nz>,
        Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        He Zhe <zhe.he@...driver.com>, Marek Vasut <marex@...x.de>,
        Douglas Anderson <dianders@...omium.org>,
        Paul Burton <paul.burton@...s.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: 8250: Add support for using platform_device resources

Lee Jones <lee.jones@...aro.org> writes:
> On Thu, 02 May 2019, Esben Haabendal wrote:
>
>> Could you help clarify whether or not this patch is trying to do
>> something odd/wrong?
>> 
>> I might be misunderstanding Andy (probably is), but the discussion
>> revolves around the changes I propose where I change the serial8250
>> driver to use platform_get_resource() in favour of
>> request_mem_region()/release_mem_region().
>
> Since 'serial8250' is registered as a platform device, I don't see any
> reason why it shouldn't have the capability to obtain its memory
> regions from the platform_get_*() helpers.

Good to hear.  That is exactly what I am trying do with this patch.

@Andy: If you still don't like my approach, could you please advice an
acceptable method for improving the serial8250 driver to allow the use
of platform_get_*() helpers?

/Esben