On Wed, Apr 13, 2022 at 12:46:07PM -0400, Tom Rini wrote: > On Wed, Apr 13, 2022 at 03:20:23PM +0100, Abdellatif El Khlifi wrote:
[...] > > Since we can not add an FFA node in the device tree, we will make FFA a > > discoverable bus. > > So, we will manually create the udevice, binding it to the driver and > > probing it. > > Manually means directly calling device_bind and device_probe APIs. > > > > Any thoughts about this approach ? > > How is it both discoverable and doesn't have a device tree node, in the > kernel? > I don't clearly understand your query here fully. Generally if some h/w is discoverable, then we don't need to have device node in the DT as it may result in conflicts. In this we can query f/w to check if a particular feature is implemented or not before we initialise the FF-A bus. One we discover the partitions we add devices for each and the individual device and associated driver gets probed based on UUID. I have neither seen the u-boot implementation nor fully understand how device/driver model differs from the kernel one to comment on details. I am happy to provide any more details if required. -- Regards, Sudeep
