linux-kernel - Re: [PATCH v2 4/9] ARM: dts: Put Cygnus core components under core bus

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Date:	Fri, 18 Sep 2015 14:57:15 -0700
From:	Ray Jui <rjui@...adcom.com>
To:	Arnd Bergmann <arnd@...db.de>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Florian Fainelli <f.fainelli@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	<devicetree@...r.kernel.org>, Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	<linux-kernel@...r.kernel.org>,
	<bcm-kernel-feedback-list@...adcom.com>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v2 4/9] ARM: dts: Put Cygnus core components under core
 bus



On 9/18/2015 2:30 PM, Arnd Bergmann wrote:
> On Friday 18 September 2015 14:24:09 Ray Jui wrote:
>>
>> +       core {
>> +               compatible = "simple-bus";
>> +               ranges;
>> +               #address-cells = <1>;
>> +               #size-cells = <1>;
>> +
>> +               timer@...20200 {
>> +                       compatible = "arm,cortex-a9-global-timer";
>> +                       reg = <0x19020200 0x100>;
>> +                       interrupts = <GIC_PPI 11 IRQ_TYPE_LEVEL_HIGH>;
>> +                       clocks = <&periph_clk>;
>> +               };
>> +
>> +               gic: interrupt-controller@...21000 {
>>
> 
> Could it be that all 'core' components are in the 0x19xxxxxx address range?
> If so, please set up an appropriate ranges property for the bus. Also
> add the address field for the bus according to which addresses are routed
> to it.
> 
> 	Arnd
> 

Yes all 'core' components are in the 0x19xxxxx address range for Cygnus.
It's fine and makes sense to set up proper ranges for this bus. But I
might have some issues with the 'soc' components and the 'soc' bus,
which I'll explain and discuss on the next email.

Ray
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