linux-kernel - Re: [PATCH 0/5] mfd: replace IORESOURCE_IO by IORESOURCE

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Message-ID: <20120807103851.GS16861@opensource.wolfsonmicro.com>
Date:	Tue, 7 Aug 2012 11:38:51 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Haojian Zhuang <haojian.zhuang@...il.com>
Cc:	Russell King <rmk@....linux.org.uk>, sameo@...ux.intel.com,
	rpurdie@...ys.net, bryan.wu@...onical.com,
	linux-kernel@...r.kernel.org, Bergmann Arnd <arnd@...db.de>
Subject: Re: [PATCH 0/5] mfd: replace IORESOURCE_IO by IORESOURCE_MEM

On Tue, Aug 07, 2012 at 09:47:25AM +0800, Haojian Zhuang wrote:

> It's because IO_SPACE_LIMIT is set as 0 if there's no PCI devices. But
> IORESOURCE_IO is also used in PMIC mfd drivers to distinguish
> different components.

The change to keep things working here (pending the other changes which
Russell wants) is to add a dummy resource with a wide enough range of
registers defined and make it the parent for all the _IO resouces the
PMIC has.  This will put all the PMIC _IO resources in a separate tree
to ioport_resource which can have the resorces added.

If nothing else this seems much more suitable for stable and -rc (the
bug has been there since v3.4).
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