Add Arm Zena CSS support

[PATCH 1/2] dt-bindings: arm: Add Zena CSS compatibility

Posted by Debbie Horsfall 2 weeks, 1 day ago

Add compatibility to Arm Zena CSS Fixed Virtual Platform [1].

[1] https://www.arm.com/products/automotive/compute-subsystems/zena

Signed-off-by: Debbie Horsfall <debbie.horsfall@arm.com>
---
 .../devicetree/bindings/arm/arm,zena-css.yaml      | 31 ++++++++++++++++++++++
 MAINTAINERS                                        |  5 ++++
 2 files changed, 36 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/arm,zena-css.yaml b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml
new file mode 100644
index 000000000000..42699b4db41e
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/arm,zena-css.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm Zena Compute Subsystem Platforms
+
+maintainers:
+  - Debbie Horsfall <debbie.horsfall@arm.com>
+
+description:
+  Arm Zena Compute Subsystem (CSS) is a compute platform targeting
+  the automotive sector. Arm Zena CSS is a high-performance Arm
+  Cortex-A720AE Application Processor system augmented with an Arm
+  Cortex-R82AE based Safety Island and real-time domain.
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: Arm Zena CSS Platforms
+        items:
+          - enum:
+              - arm,zena-css-fvp
+          - const: arm,zena-css
+
+additionalProperties: true
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 6863d5fa07a1..90d88137adf1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3723,6 +3723,11 @@ F:	drivers/video/fbdev/vt8500lcdfb.*
 F:	drivers/video/fbdev/wm8505fb*
 F:	drivers/video/fbdev/wmt_ge_rops.*
 
+ARM/ZENA CSS PLATFORM
+M:	Debbie Horsfall <debbie.horsfall@arm.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/arm/arm,zena-css.yaml
+
 ARM/ZYNQ ARCHITECTURE
 M:	Michal Simek <michal.simek@amd.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)

-- 
2.43.0

Re: [PATCH 1/2] dt-bindings: arm: Add Zena CSS compatibility

Posted by Krzysztof Kozlowski 3 days, 1 hour ago

On 23/01/2026 18:37, Debbie Horsfall wrote:
> Add compatibility to Arm Zena CSS Fixed Virtual Platform [1].
> 
> [1] https://www.arm.com/products/automotive/compute-subsystems/zena
> 
> Signed-off-by: Debbie Horsfall <debbie.horsfall@arm.com>
> ---
>  .../devicetree/bindings/arm/arm,zena-css.yaml      | 31 ++++++++++++++++++++++
>  MAINTAINERS                                        |  5 ++++
>  2 files changed, 36 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/arm,zena-css.yaml b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml
> new file mode 100644
> index 000000000000..42699b4db41e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml

This should really go to one YAML file for most of FVP from ARM.

Best regards,
Krzysztof

Re: [PATCH 1/2] dt-bindings: arm: Add Zena CSS compatibility

Posted by Sudeep Holla 2 days, 23 hours ago

On Thu, Feb 05, 2026 at 01:29:18PM +0100, Krzysztof Kozlowski wrote:
> On 23/01/2026 18:37, Debbie Horsfall wrote:
> > Add compatibility to Arm Zena CSS Fixed Virtual Platform [1].
> > 
> > [1] https://www.arm.com/products/automotive/compute-subsystems/zena
> > 
> > Signed-off-by: Debbie Horsfall <debbie.horsfall@arm.com>
> > ---
> >  .../devicetree/bindings/arm/arm,zena-css.yaml      | 31 ++++++++++++++++++++++
> >  MAINTAINERS                                        |  5 ++++
> >  2 files changed, 36 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/arm,zena-css.yaml b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml
> > new file mode 100644
> > index 000000000000..42699b4db41e
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/arm/arm,zena-css.yaml
> 
> This should really go to one YAML file for most of FVP from ARM.
> 

Fair point, we have existing FVPs in [1]. We can move this there as well
but if it becomes too much or if we can get it more organised based on
some category in the future, we can take it up then. For now, I am happy
to shove it in [1].

-- 
Regards,
Sudeep

[1] Documentation/devicetree/bindings/arm/arm,vexpress-juno.yaml

Re: [PATCH 1/2] dt-bindings: arm: Add Zena CSS compatibility

Posted by Rob Herring (Arm) 1 week, 5 days ago

On Fri, 23 Jan 2026 17:37:46 +0000, Debbie Horsfall wrote:
> Add compatibility to Arm Zena CSS Fixed Virtual Platform [1].
> 
> [1] https://www.arm.com/products/automotive/compute-subsystems/zena
> 
> Signed-off-by: Debbie Horsfall <debbie.horsfall@arm.com>
> ---
>  .../devicetree/bindings/arm/arm,zena-css.yaml      | 31 ++++++++++++++++++++++
>  MAINTAINERS                                        |  5 ++++
>  2 files changed, 36 insertions(+)
> 

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>