linux-kernel - Re: DT config of io resource

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Date:	Wed, 13 Jan 2016 09:55:15 +0800
From:	Rongrong Zou <zourongrong@...il.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: DT config of io resource

On 2016/1/13 1:31, Sebastian Andrzej Siewior wrote:
> * Rolland Chau | 2015-12-31 13:46:14 [+0800]:
>
>> Hi Sebastian,
> Hi,
>
>> I see that your sent a patch contain the below dt config.
>>
>> I want to konw how can i get IO resource from dts, how is the
>>
>> parent node configed? thanks.
>
> The complete node can be found in
>      arch/x86/platform/ce4100/falconfalls.dts
>
> The ressource should be configured by the platform_device code so a
>      platform_get_resource(pdev, IORESOURCE_IO, 0);
> should do the trick. The upper bus is ISA and the first 1 in reg
> classifies the memory as IO memory and not memory mapped.
>

I found your isa node is as subnode of pci node, so does the I/O port on isa
is memory-mapped into PCI address space ?

> Sebastian
>

Regards,
Rongrong