[PATCH v2 0/2] arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

[PATCH v2 0/2] arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

[Gregor Herburger]

The bcm2712 found on the Raspberry Pi 5 is available in the d Stepping
and in a c Stepping. There are two separate dts files. The
bcm2712-rpi-5-b.dts for the c Stepping and the bcm2712-d-rpi-5-b.dts for
the d Stepping. The d stepping does not set its own compatible/model
string but uses "raspberrypi,5-model-b".

These two steppings are not compatible. Booting with the wrong dtb file
causes a crash at boot.

Add a compatibles string "raspberrypi,5-model-b-d0" to allow us to
distinguish between those two steppings.

---
Changes in v2:
- Removed the wrong oneOf
- Link to v1: https://patch.msgid.link/20260803-bcm2712-d-stepping-compatible-v1-0-401934357a44@linutronix.de

---
Gregor Herburger (2):
      dt-bindings: arm: bcm2835: Add Raspberry Pi 5 d0 Stepping
      arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml | 6 ++++++
 arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts     | 5 +++++
 2 files changed, 11 insertions(+)
---
base-commit: 8ba098e6b6ff0db8edf28528d1552be261af30d4
change-id: 20260731-bcm2712-d-stepping-compatible-4b40f0c4bda5

Best regards,
--  
Gregor Herburger <gregor.herburger@linutronix.de>

[PATCH v2 1/2] dt-bindings: arm: bcm2835: Add Raspberry Pi 5 d0 Stepping

[Gregor Herburger]

Add the Raspberry Pi 5 d0 Stepping to the schema.

Signed-off-by: Gregor Herburger <gregor.herburger@linutronix.de>
---
 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
index 2729a542c4f3..32e1b01676d6 100644
--- a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
@@ -29,6 +29,12 @@ properties:
               - raspberrypi,5-model-b
           - const: brcm,bcm2712
 
+      - description: BCM2712 based Boards d0 stepping
+        items:
+          - const: raspberrypi,5-model-b-d0
+          - const: raspberrypi,5-model-b
+          - const: brcm,bcm2712
+
       - description: BCM2835 based Boards
         items:
           - enum:

-- 
2.47.3

[PATCH v2 2/2] arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

[Gregor Herburger]

The bcm2712 found on the Raspberry Pi 5 is available in the d Stepping
and in a c Stepping. There are two separate dts files. The
bcm2712-rpi-5-b.dts for the c Stepping and the bcm2712-d-rpi-5-b.dts for
the d Stepping. The d stepping does not set its own compatible/model
string but uses "raspberrypi,5-model-b".

These two steppings are not compatible. Booting with the wrong dtb file
causes a crash at boot.

Add a compatibles string "raspberrypi,5-model-b-d0" to allow us to
distinguish between those two steppings.

Signed-off-by: Gregor Herburger <gregor.herburger@linutronix.de>
---
 arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
index 127be0fc27c2..11a38cd53401 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
+++ b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
@@ -3,6 +3,11 @@
 
 #include "bcm2712-rpi-5-b.dts"
 
+/ {
+	compatible = "raspberrypi,5-model-b-d0", "raspberrypi,5-model-b", "brcm,bcm2712";
+	model = "Raspberry Pi 5 d0 Stepping";
+};
+
 &gio_aon {
 	brcm,gpio-bank-widths = <15 6>;
 

-- 
2.47.3

Re: [PATCH v2 2/2] arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

[Krzysztof Kozlowski]

On Mon, Aug 03, 2026 at 02:09:25PM +0200, Gregor Herburger wrote:
> The bcm2712 found on the Raspberry Pi 5 is available in the d Stepping
> and in a c Stepping. There are two separate dts files. The
> bcm2712-rpi-5-b.dts for the c Stepping and the bcm2712-d-rpi-5-b.dts for
> the d Stepping. The d stepping does not set its own compatible/model
> string but uses "raspberrypi,5-model-b".
> 
> These two steppings are not compatible. Booting with the wrong dtb file

Not compatible but...

> causes a crash at boot.
> 
> Add a compatibles string "raspberrypi,5-model-b-d0" to allow us to
> distinguish between those two steppings.
> 
> Signed-off-by: Gregor Herburger <gregor.herburger@linutronix.de>
> ---
>  arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> index 127be0fc27c2..11a38cd53401 100644
> --- a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> +++ b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> @@ -3,6 +3,11 @@
>  
>  #include "bcm2712-rpi-5-b.dts"
>  
> +/ {
> +	compatible = "raspberrypi,5-model-b-d0", "raspberrypi,5-model-b", "brcm,bcm2712";

this tells they are compatible. If compatibility was wrong since the
beginning, you do not have to preserve the ABI.

Best regards,
Krzysztof

Re: [PATCH v2 2/2] arm64: dts: broadcom: bcm2712-d-rpi-5-b: add compatible

[Gregor Herburger]

On Tue, Aug 04, 2026 at 09:48:19AM +0200, Krzysztof Kozlowski wrote:
> On Mon, Aug 03, 2026 at 02:09:25PM +0200, Gregor Herburger wrote:
> > The bcm2712 found on the Raspberry Pi 5 is available in the d Stepping
> > and in a c Stepping. There are two separate dts files. The
> > bcm2712-rpi-5-b.dts for the c Stepping and the bcm2712-d-rpi-5-b.dts for
> > the d Stepping. The d stepping does not set its own compatible/model
> > string but uses "raspberrypi,5-model-b".
> > 
> > These two steppings are not compatible. Booting with the wrong dtb file
> 
> Not compatible but...
> 
> > causes a crash at boot.
> > 
> > Add a compatibles string "raspberrypi,5-model-b-d0" to allow us to
> > distinguish between those two steppings.
> > 
> > Signed-off-by: Gregor Herburger <gregor.herburger@linutronix.de>
> > ---
> >  arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts | 5 +++++
> >  1 file changed, 5 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> > index 127be0fc27c2..11a38cd53401 100644
> > --- a/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> > +++ b/arch/arm64/boot/dts/broadcom/bcm2712-d-rpi-5-b.dts
> > @@ -3,6 +3,11 @@
> >  
> >  #include "bcm2712-rpi-5-b.dts"
> >  
> > +/ {
> > +	compatible = "raspberrypi,5-model-b-d0", "raspberrypi,5-model-b", "brcm,bcm2712";
> 
> this tells they are compatible. If compatibility was wrong since the
> beginning, you do not have to preserve the ABI.
Ok understood. Will drop the fallback and make it either
	compatible = "raspberrypi,5-model-b-d0", "brcm,bcm2712";
or
	compatible = "raspberrypi,5-model-b", "brcm,bcm2712";
> 
> Best regards,
> Krzysztof
> 
Best regards,
-- 
Gregor Herburger
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