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[PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

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  [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node Jisheng Zhang <jszhang@marvell.com> - 2016-09-06 11:10 +0200
    Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc  node Mark Rutland <mark.rutland@arm.com> - 2016-09-06 12:30 +0200
      Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to  /soc node Jisheng Zhang <jszhang@marvell.com> - 2016-09-06 12:30 +0200
        Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc  node Mark Rutland <mark.rutland@arm.com> - 2016-09-06 13:00 +0200
          Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc  node Stephen Warren <swarren@wwwdotorg.org> - 2016-09-06 18:10 +0200

#1477178 — [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

This patch fixes the following DTC warning with W=1:

"Node /soc has a reg or ranges property, but no unit name"

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
---
 arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
index 099ad93..2d6f91f 100644
--- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
+++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
@@ -134,7 +134,7 @@
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
 	};
 
-	soc {
+	soc@f7000000 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
2.9.3

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#1477251 — Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote:
> This patch fixes the following DTC warning with W=1:
> 
> "Node /soc has a reg or ranges property, but no unit name"
> 
> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>

The node is only compatible with simple-bus, and so shouldn't have a
reg.

Why not remove the reg?

Mark

> ---
>  arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> index 099ad93..2d6f91f 100644
> --- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> +++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> @@ -134,7 +134,7 @@
>  			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
>  	};
>  
> -	soc {
> +	soc@f7000000 {
>  		compatible = "simple-bus";
>  		#address-cells = <1>;
>  		#size-cells = <1>;
> -- 
> 2.9.3
> 

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#1477258 — Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

Hi Mark,

On Tue, 6 Sep 2016 11:22:08 +0100 Mark Rutland wrote:

> On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote:
> > This patch fixes the following DTC warning with W=1:
> > 
> > "Node /soc has a reg or ranges property, but no unit name"
> > 
> > Signed-off-by: Jisheng Zhang <jszhang@marvell.com>  
> 
> The node is only compatible with simple-bus, and so shouldn't have a
> reg.

IIUC, the warning is caused by "ranges = <0 0 0xf7000000 0x1000000>;"

Thanks,
Jisheng

> 
> Why not remove the reg?
> 
> Mark
> 
> > ---
> >  arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > index 099ad93..2d6f91f 100644
> > --- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > +++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > @@ -134,7 +134,7 @@
> >  			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> >  	};
> >  
> > -	soc {
> > +	soc@f7000000 {
> >  		compatible = "simple-bus";
> >  		#address-cells = <1>;
> >  		#size-cells = <1>;
> > -- 
> > 2.9.3
> >   

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#1477277 — Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

On Tue, Sep 06, 2016 at 06:20:48PM +0800, Jisheng Zhang wrote:
> Hi Mark,
> 
> On Tue, 6 Sep 2016 11:22:08 +0100 Mark Rutland wrote:
> 
> > On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote:
> > > This patch fixes the following DTC warning with W=1:
> > > 
> > > "Node /soc has a reg or ranges property, but no unit name"
> > > 
> > > Signed-off-by: Jisheng Zhang <jszhang@marvell.com>  
> > 
> > The node is only compatible with simple-bus, and so shouldn't have a
> > reg.
> 
> IIUC, the warning is caused by "ranges = <0 0 0xf7000000 0x1000000>;"

Hmm.. I've rather confused by that warning. Per ePAPR and the
devicetree.org spec, the unit-addresss is meant to match the reg
property, and no mention is made of the ranges property. So I do not
think that it is necessary to require this.

That warning seems to have gone into DTC in commit c9d9121683b35281
("Warn on node name unit-address presence/absence mismatch").

Rob, Stephen, was there some discussion that prompted ranges requiring
a matching unit-address?

Thanks,
Mark.

> > Why not remove the reg?
> > 
> > Mark
> > 
> > > ---
> > >  arch/arm64/boot/dts/marvell/berlin4ct.dtsi | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > index 099ad93..2d6f91f 100644
> > > --- a/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > +++ b/arch/arm64/boot/dts/marvell/berlin4ct.dtsi
> > > @@ -134,7 +134,7 @@
> > >  			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> > >  	};
> > >  
> > > -	soc {
> > > +	soc@f7000000 {
> > >  		compatible = "simple-bus";
> > >  		#address-cells = <1>;
> > >  		#size-cells = <1>;
> > > -- 
> > > 2.9.3
> > >   
> 

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#1477573 — Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node

On 09/06/2016 04:57 AM, Mark Rutland wrote:
> On Tue, Sep 06, 2016 at 06:20:48PM +0800, Jisheng Zhang wrote:
>> Hi Mark,
>>
>> On Tue, 6 Sep 2016 11:22:08 +0100 Mark Rutland wrote:
>>
>>> On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote:
>>>> This patch fixes the following DTC warning with W=1:
>>>>
>>>> "Node /soc has a reg or ranges property, but no unit name"
>>>>
>>>> Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
>>>
>>> The node is only compatible with simple-bus, and so shouldn't have a
>>> reg.
>>
>> IIUC, the warning is caused by "ranges = <0 0 0xf7000000 0x1000000>;"
>
> Hmm.. I've rather confused by that warning. Per ePAPR and the
> devicetree.org spec, the unit-addresss is meant to match the reg
> property, and no mention is made of the ranges property. So I do not
> think that it is necessary to require this.
>
> That warning seems to have gone into DTC in commit c9d9121683b35281
> ("Warn on node name unit-address presence/absence mismatch").
>
> Rob, Stephen, was there some discussion that prompted ranges requiring
> a matching unit-address?

It looks like there was some in response to V2 of the patch which 
introduced this warning in dtc:

https://lkml.org/lkml/2013/9/19/301

I assume that's why Rob added that part to the patch when he reposted it.

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