Hi Bertrand,
On 30/05/2024 10:40, Bertrand Marquis wrote:
But we are making assumption that all TEE implementation will have its
node inside "/firmware/". I am not 100% sure that this is correct. For
example I saw that Google Trusty uses "/trusty" node (directly inside
the DTS root). On other hand, it is not defined in dts bindings, as far
as I know.
Regarding the firmware part you can easily handle that by looking for /firmware
and create it if it does not exist before creating your sub-node and this should
be node in the optee node creation function not in tee.c.
This would work if the node /firmware doesn't exist. But how would you
handle the case where it is already present?
I looked at the libfdt API and AFAICT the DTB creation needs to be
linear. IOW, you can't add a subnode to an already created node.
There is an helper to create a placeholder, but AFAIK this is only for a
property. You also need to know the size in advance.
Cheers,
--
Julien Grall
