linux-kernel - Re: [PATCH] ARC: AXS: prepare dts files for enabling PAE40 on axs103

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Date:   Fri, 7 Jul 2017 22:28:30 +0000
From:   Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:     Vineet Gupta <Vineet.Gupta1@...opsys.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Eugeniy.Paltsev@...opsys.com" <Eugeniy.Paltsev@...opsys.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: [PATCH] ARC: AXS: prepare dts files for enabling PAE40 on axs103

Hi Vineet,

On Fri, 2017-07-07 at 12:57 -0700, Vineet Gupta wrote:
> On 06/26/2017 04:47 AM, Eugeniy Paltsev wrote:
> > 
> > Enable 64bit adressing, where it needed, to make possible
> > enabling PAE40 on axs103.
> > 
> > This patch doesn't affect on any functionality.
> > 
> > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
> > ---
> >   arch/arc/boot/dts/axc001.dtsi     | 20 +++++++++-----------
> >   arch/arc/boot/dts/axc003.dtsi     | 21 ++++++++++-----------
> >   arch/arc/boot/dts/axc003_idu.dtsi | 21 ++++++++++-----------
> >   arch/arc/boot/dts/axs10x_mb.dtsi  |  2 +-
> >   4 files changed, 30 insertions(+), 34 deletions(-)
> > 
> > diff --git a/arch/arc/boot/dts/axc001.dtsi b/arch/arc/boot/dts/axc001.dtsi
> > index 53ce226..a380ffa 100644
> > --- a/arch/arc/boot/dts/axc001.dtsi
> > +++ b/arch/arc/boot/dts/axc001.dtsi
> > @@ -15,15 +15,15 @@
> >   
> >   / {
> >   	compatible = "snps,arc";
> > -	#address-cells = <1>;
> > -	#size-cells = <1>;
> > +	#address-cells = <2>;
> > +	#size-cells = <2>;
> >   
> >   	cpu_card {
> >   		compatible = "simple-bus";
> >   		#address-cells = <1>;
> >   		#size-cells = <1>;
> >   
> > -		ranges = <0x00000000 0xf0000000 0x10000000>;
> > +		ranges = <0x00000000 0x0 0xf0000000 0x10000000>;
> 
> AXS101 can't support PAE etc - but I guess you still need to make the change here 
> because the DT bits for MB are shared ?

Correct that's the case. So it looks misleading but as long as we want to share MB's .dtsi
for both axs101 and axs103 we need to keep that change.

-Alexey