Re: Grafting old platform drivers onto a new DT kernel

From	Måns Rullgård <mans@mansr.com>
Newsgroups	linux.kernel
Subject	Re: Grafting old platform drivers onto a new DT kernel
Date	2015-11-09 17:20 +0100
Message-ID	<qsXkK-i7-39@gated-at.bofh.it> (permalink)
References	(1 earlier) <qruut-8oo-5@gated-at.bofh.it> <qruXw-6f-11@gated-at.bofh.it> <qsWoF-89v-5@gated-at.bofh.it> <qsWRI-8jE-9@gated-at.bofh.it> <qsXb4-dY-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Mason <slash.tmp@free.fr> writes:

> On 09/11/2015 16:40, Måns Rullgård wrote:
>
>> The simplest solution for you is probably to add a quick and dirty DT
>> binding to the old driver.  If it doesn't use any driver-specific
>> platform data struct, you only need to set .of_match_table in the
>> struct platform_driver.  If there is a platform data struct, you'll also
>> need to write some code to populate it from DT properties.  It shouldn't
>> take more than a few minutes per driver in most cases.
>
> I'll try that approach, although I fear that "a few minutes per driver"
> is an optimistic assessment.

If the driver only needs an MMIO region and an IRQ, it is literally five
lines of code.

-- 
Måns Rullgård
mans@mansr.com
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Thread

Grafting old platform drivers onto a new DT kernel Mason <slash.tmp@free.fr> - 2015-11-05 12:10 +0100
  Re: Grafting old platform drivers onto a new DT kernel Andrew Lunn <andrew@lunn.ch> - 2015-11-05 16:20 +0100
    Re: Grafting old platform drivers onto a new DT kernel Javier Martinez Canillas <javier@dowhile0.org> - 2015-11-05 16:50 +0100
      Re: Grafting old platform drivers onto a new DT kernel Mason <slash.tmp@free.fr> - 2015-11-09 16:20 +0100
        Re: Grafting old platform drivers onto a new DT kernel Marc Zyngier <marc.zyngier@arm.com> - 2015-11-09 16:40 +0100
        Re: Grafting old platform drivers onto a new DT kernel Måns Rullgård <mans@mansr.com> - 2015-11-09 16:50 +0100
          Re: Grafting old platform drivers onto a new DT kernel Mason <slash.tmp@free.fr> - 2015-11-09 17:10 +0100
            Re: Grafting old platform drivers onto a new DT kernel Måns Rullgård <mans@mansr.com> - 2015-11-09 17:20 +0100
              Re: Grafting old platform drivers onto a new DT kernel Mason <slash.tmp@free.fr> - 2015-11-09 18:10 +0100
                Re: Grafting old platform drivers onto a new DT kernel Måns Rullgård <mans@mansr.com> - 2015-11-09 18:20 +0100
                Re: Grafting old platform drivers onto a new DT kernel Mason <slash.tmp@free.fr> - 2015-11-10 13:50 +0100
                Re: Grafting old platform drivers onto a new DT kernel Arnd Bergmann <arnd@arndb.de> - 2015-11-10 14:00 +0100
        Re: Grafting old platform drivers onto a new DT kernel Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-11-09 17:30 +0100

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