On Fri, Feb 9, 2024 at 5:26 PM Nuno Sa <nuno.sa@xxxxxxxxxx> wrote:
>
> This is a Framework to handle complex IIO aggregate devices.
>
> The typical architecture is to have one device as the frontend device which
> can be "linked" against one or multiple backend devices. All the IIO and
> userspace interface is expected to be registers/managed by the frontend
> device which will callback into the backends when needed (to get/set
> some configuration that it does not directly control).
>
> The basic framework interface is pretty simple:
> - Backends should register themselves with @devm_iio_backend_register()
> - Frontend devices should get backends with @devm_iio_backend_get()
...
> + fwnode = fwnode_find_reference(dev_fwnode(dev), "io-backends", index);
> + if (IS_ERR(fwnode)) {
> + dev_err_probe(dev, PTR_ERR(fwnode),
> + "Cannot get Firmware reference\n");
> + return ERR_CAST(fwnode);
You can combine them in one line (yeah, a bit ugly, I know, we
discussed with Andi at some point that it would be nice to have
dev_err_probe*() family of helpers for this and other not yet covered
cases). Whatever Jonathan likes (as two or a single line), I'm fine
with this, just a side note.
> + }
--
With Best Regards,
Andy Shevchenko
