From: Mark Brown <broonie@kernel.org>
To: leroy christophe <christophe.leroy@c-s.fr>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-spi@vger.kernel.org
Subject: Re: [PATCH] spi: fsl-spi: use of_iomap() to map parameter ram on CPM1
Date: Fri, 6 Mar 2015 11:44:13 +0000 [thread overview]
Message-ID: <20150306114413.GM21293@sirena.org.uk> (raw)
In-Reply-To: <54F6BBA7.8040008@c-s.fr>
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On Wed, Mar 04, 2015 at 09:00:39AM +0100, leroy christophe wrote:
> Le 03/03/2015 19:44, Mark Brown a écrit :
> >Why are we using of_iomap() rather than a generic I/O mapping function
> >here?
> because all drivers for powerpc seems to be using of_iomap(), as on powerpc
> the HW is described by the bootloader in a OF device tree.
> Today, of_iomap() is at least used in FSL SPI, FSL UART, SPI mpc52xx, UART
> mpc52xx, i2c-mpc, i2c-cpm, freescale ethernet drivers, etc ....
> Is it not correct ?
It's legacy, all that code is really old. Modern code is written in as
architecture and firmware neutral a fashion as possible to make things
more consistent and maintainable.
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next prev parent reply other threads:[~2015-03-06 11:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-26 16:11 Christophe Leroy
2015-03-03 18:44 ` Mark Brown
2015-03-04 8:00 ` leroy christophe
2015-03-06 11:44 ` Mark Brown [this message]
2015-03-12 6:52 ` leroy christophe
2015-03-18 12:03 ` Mark Brown
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