[PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Herve Codina (Schneider Electric)]

When checking dts involving the r9a06g032.dtsi file, the following kind
of warnings are reported:
   Missing property '#address-cells' in node xxx, using 0 as fallback

Indeed, #address-cells is not present in the GIC interrupt controller
node.

Fix it adding the missing property.

No functional change.

Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
---
 arch/arm/boot/dts/renesas/r9a06g032.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/renesas/r9a06g032.dtsi b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
index f4f760aff28b..6acf524174c7 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
+++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
@@ -507,6 +507,7 @@ gic: interrupt-controller@44101000 {
 			compatible = "arm,gic-400", "arm,cortex-a7-gic";
 			interrupt-controller;
 			#interrupt-cells = <3>;
+			#address-cells = <0>;
 			reg = <0x44101000 0x1000>, /* Distributer */
 			      <0x44102000 0x2000>, /* CPU interface */
 			      <0x44104000 0x2000>, /* Virt interface control */
-- 
2.53.0

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Wolfram Sang]

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On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
> When checking dts involving the r9a06g032.dtsi file, the following kind
> of warnings are reported:
>    Missing property '#address-cells' in node xxx, using 0 as fallback
> 
> Indeed, #address-cells is not present in the GIC interrupt controller
> node.
> 
> Fix it adding the missing property.
> 
> No functional change.
> 
> Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>

How did you trigger this? It doesn't show up with the upstream DTs for
N1D. Can you share the snippet which causes the problem for you?


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Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Herve Codina]

Hi Wolfram,

On Tue, 10 Mar 2026 23:06:57 +0100
Wolfram Sang <wsa+renesas@sang-engineering.com> wrote:

> On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
> > When checking dts involving the r9a06g032.dtsi file, the following kind
> > of warnings are reported:
> >    Missing property '#address-cells' in node xxx, using 0 as fallback
> > 
> > Indeed, #address-cells is not present in the GIC interrupt controller
> > node.
> > 
> > Fix it adding the missing property.
> > 
> > No functional change.
> > 
> > Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>  
> 
> How did you trigger this? It doesn't show up with the upstream DTs for
> N1D. Can you share the snippet which causes the problem for you?
> 

I compiled the dtb with W=1 and CHECK_DTBS=1

$ touch arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
$ make ARCH=arm CROSS_COMPILE=... W=1 CHECK_DTBS=1 renesas/r9a06g032-rzn1d400-eb.dtb
  DTC [C] arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dtb
arch/arm/boot/dts/renesas/r9a06g032.dtsi:156.4-158.33: Warning (interrupt_map): /soc/pci@40030000:interrupt-map: Missing property '#address-cells' in node /soc/interrupt-controller@44101000, using 0 as fallback
arch/arm/boot/dts/renesas/r9a06g032.dtsi:156.4-158.33: Warning (interrupt_map): /soc/pci@40030000:interrupt-map: Missing property '#address-cells' in node /soc/interrupt-controller@44101000, using 0 as fallback
arch/arm/boot/dts/renesas/r9a06g032.dtsi:156.4-158.33: Warning (interrupt_map): /soc/pci@40030000:interrupt-map: Missing property '#address-cells' in node /soc/interrupt-controller@44101000, using 0 as fallback
arch/arm/boot/dts/renesas/r9a06g032.dtsi:672.4-37: Warning (interrupt_map): /soc/interrupt-controller@51000480:interrupt-map: Missing property '#address-cells' in node /soc/interrupt-controller@44101000, using 0 as fallback
$

Best regards,
Hervé

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Krzysztof Kozlowski]

On 10/03/2026 23:06, Wolfram Sang wrote:
> On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
>> When checking dts involving the r9a06g032.dtsi file, the following kind
>> of warnings are reported:
>>    Missing property '#address-cells' in node xxx, using 0 as fallback
>>
>> Indeed, #address-cells is not present in the GIC interrupt controller
>> node.
>>
>> Fix it adding the missing property.
>>
>> No functional change.
>>
>> Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
> 
> How did you trigger this? It doesn't show up with the upstream DTs for
> N1D. Can you share the snippet which causes the problem for you?

That's just standard DTC warning. I was fixing most of the arm64
platforms already:

https://lore.kernel.org/all/?q=f%3Akrzysztof+%22Add+default+GIC+address+cells%22

Best regards,
Krzysztof

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Wolfram Sang]

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> I compiled the dtb with W=1 and CHECK_DTBS=1

W=1 adds extra warnings? I am surprised I didn't know this yet. Updated
my build scripts, thanks! Confirming the issue.


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Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Wolfram Sang]

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On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
> When checking dts involving the r9a06g032.dtsi file, the following kind
> of warnings are reported:
>    Missing property '#address-cells' in node xxx, using 0 as fallback
> 
> Indeed, #address-cells is not present in the GIC interrupt controller
> node.
> 
> Fix it adding the missing property.
> 
> No functional change.
> 
> Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>

Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

I like Krzysztof's explanation "Value '0' is correct because GIC
interrupt controller does not have children." Maybe it can be added to
the commit message?


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Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Geert Uytterhoeven]

Hi Wolfram,

On Wed, 11 Mar 2026 at 09:32, Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
> On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
> > When checking dts involving the r9a06g032.dtsi file, the following kind
> > of warnings are reported:
> >    Missing property '#address-cells' in node xxx, using 0 as fallback
> >
> > Indeed, #address-cells is not present in the GIC interrupt controller
> > node.
> >
> > Fix it adding the missing property.
> >
> > No functional change.
> >
> > Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
>
> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
>
> I like Krzysztof's explanation "Value '0' is correct because GIC
> interrupt controller does not have children." Maybe it can be added to
> the commit message?

Some of the examples in the GIC DT bindings, do?
But #address-cells is not a required property in the GIC DT bindings,
so why should it be added at all?

BTW, I never understood why an interrupt-controller should have
#address-cells (according to dtc)?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Herve Codina]

Hi Geert,

On Wed, 11 Mar 2026 09:39:40 +0100
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> Hi Wolfram,
> 
> On Wed, 11 Mar 2026 at 09:32, Wolfram Sang
> <wsa+renesas@sang-engineering.com> wrote:
> > On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:  
> > > When checking dts involving the r9a06g032.dtsi file, the following kind
> > > of warnings are reported:
> > >    Missing property '#address-cells' in node xxx, using 0 as fallback
> > >
> > > Indeed, #address-cells is not present in the GIC interrupt controller
> > > node.
> > >
> > > Fix it adding the missing property.
> > >
> > > No functional change.
> > >
> > > Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>  
> >
> > Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > I like Krzysztof's explanation "Value '0' is correct because GIC
> > interrupt controller does not have children." Maybe it can be added to
> > the commit message?  
> 
> Some of the examples in the GIC DT bindings, do?
> But #address-cells is not a required property in the GIC DT bindings,
> so why should it be added at all?
> 
> BTW, I never understood why an interrupt-controller should have
> #address-cells (according to dtc)?

I think this comes from the interrupt-map definition:
  https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#interrupt-map

Best regards,
Hervé

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Herve Codina]

Hi Wolfram,

On Wed, 11 Mar 2026 09:32:53 +0100
Wolfram Sang <wsa+renesas@sang-engineering.com> wrote:

> On Tue, Mar 03, 2026 at 11:20:29AM +0100, Herve Codina (Schneider Electric) wrote:
> > When checking dts involving the r9a06g032.dtsi file, the following kind
> > of warnings are reported:
> >    Missing property '#address-cells' in node xxx, using 0 as fallback
> > 
> > Indeed, #address-cells is not present in the GIC interrupt controller
> > node.
> > 
> > Fix it adding the missing property.
> > 
> > No functional change.
> > 
> > Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>  
> 
> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> I like Krzysztof's explanation "Value '0' is correct because GIC
> interrupt controller does not have children." Maybe it can be added to
> the commit message?
> 

I will update the commit log on the v2 iteration.

Should I keep your reviewed-by tag for this v2. Indeed, you don't have seen
yet the new commit log :)

Best regards,
Hervé

-- 
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH] ARM: dts: r9a06g032: Add #address-cells in the GIC node

[Wolfram Sang]

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> Should I keep your reviewed-by tag for this v2. Indeed, you don't have seen
> yet the new commit log :)

I trust you ;)


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