Add mboxes to define a GCE loopping thread as a secure irq handler.
This property is only required if CMDQ secure driver is supported.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 .../devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
index e4da0a58c943..0c17e1be99c2 100644
--- a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
@@ -56,6 +56,9 @@ properties:
       include/dt-bindings/gce/<chip>-gce.h of each chips.
     $ref: /schemas/types.yaml#/definitions/uint32-array
 
+  mboxes:
+    maxItems: 1
+
 required:
   - compatible
   - "#mbox-cells"
-- 
2.18.0

On Fri, Dec 22, 2023 at 12:52:21PM +0800, Jason-JH.Lin wrote:
> Add mboxes to define a GCE loopping thread as a secure irq handler.

> This property is only required if CMDQ secure driver is supported.

What do drivers have to do with this? Either the mailbox channel exists
or it does not. That said, I am not sure why this should be in DT in the
first place, can't the driver for the mailbox controller reserve a
channel for its own use?

Thanks,
Conor.

> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
>  .../devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml      | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
> index e4da0a58c943..0c17e1be99c2 100644
> --- a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
> +++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
> @@ -56,6 +56,9 @@ properties:
>        include/dt-bindings/gce/<chip>-gce.h of each chips.
>      $ref: /schemas/types.yaml#/definitions/uint32-array
>  
> +  mboxes:
> +    maxItems: 1
> +
>  required:
>    - compatible
>    - "#mbox-cells"
> -- 
> 2.18.0
> 

Hi Conor,

Thanks for the reviews.

On Fri, 2023-12-22 at 15:07 +0000, Conor Dooley wrote:
> On Fri, Dec 22, 2023 at 12:52:21PM +0800, Jason-JH.Lin wrote:
> > Add mboxes to define a GCE loopping thread as a secure irq handler.
> > This property is only required if CMDQ secure driver is supported.
> 
> What do drivers have to do with this? Either the mailbox channel
> exists
> or it does not. That said, I am not sure why this should be in DT in
> the
> first place, can't the driver for the mailbox controller reserve a
> channel for its own use?
> 
> Thanks,
> Conor.

Since we implemented our mtk-cmdq-mailbox driver with mailbox
frameworks, one mbox channel bounds to a GCE HW thread.
So if we want to request a mbox channel for using a GCE HW thread for
secure irq handler in mtk-cmdq-mailbox driver itself, I think we need
to add this property to DT.

Regards,
Jason-JH.Lin

[snip]