netdev - Re: [PATCH] gianfar_ptp: use iomem, not ioports resource tree in probe

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Date:	Wed, 24 Oct 2012 17:59:38 +0000
From:	Tabi Timur-B04825 <B04825@...escale.com>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Wei Yang <Wei.Yang@...driver.com>,
	Manoil Claudiu-B08782 <B08782@...escale.com>,
	Tabi Timur-B04825 <B04825@...escale.com>
Subject: Re: [PATCH] gianfar_ptp: use iomem, not ioports resource tree in
 probe

On Wed, Oct 24, 2012 at 10:21 AM, Paul Gortmaker
<paul.gortmaker@...driver.com> wrote:
> From: Wei Yang <Wei.Yang@...driver.com>
>
> When using a 36 bit dtb file, the driver complains "resource busy".
>
> Investigating the source of the message leads one to the
> gianfar_ptp_probe function.
>
> Since the type of the device resource requested in this function
> is IORESOURCE_MEM, it should use "iomem_resource" instead of
> "ioports_resource".

I can't comment on this patch, since I didn't write the driver, but I
am confused on one thing.  Why is the driver using platform_xxx calls
to get data?  Why isn't it using of_xxx calls to read properties from
the device tree?  For example, why is it using

	etsects->irq = platform_get_irq(dev, 0);

to get the IRQ?  Shouldn't it do this instead:

	etsects->irq = irq_of_parse_and_map(node, 0);

-- 
Timur Tabi
Linux kernel developer at Freescale
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