DT config of io resource

DT config of io resource

[Rolland Chau]

Hi Sebastian,

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.


 > +ISA Example:
 > +
 > +	rtc@70 {
 > +	         compatible = "motorola,mc146818";
 > +	         interrupts = <8 3>;
 > +	         interrupt-parent = <&ioapic1>;
 > +	         ctrl-reg = <2>;
 > +	         freq-reg = <0x26>;
 > +	         reg = <1 0x70 2>;
 > +	 };

 >  	return cmos_do_probe(&pdev->dev,
 >  			platform_get_resource(pdev, IORESOURCE_IO, 0),

Regaurds!

Re: DT config of io resource

[Sebastian Andrzej Siewior]

* 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.

Sebastian

Re: DT config of io resource

[Rongrong Zou]

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