[net-next PATCH v2 10/14] device property: Introduce fwnode_get_id()

[Calvin Johnson]

On Tue, Dec 15, 2020 at 07:45:16PM +0200, Andy Shevchenko wrote:
> On Tue, Dec 15, 2020 at 6:44 PM Calvin Johnson
> <calvin.johnson at oss.nxp.com> wrote:
> >
> > Using fwnode_get_id(), get the reg property value for DT node
> > and get the _ADR object value for ACPI node.
> 
> and -> or
> 
> ...
> 
> > +/**
> > + * fwnode_get_id - Get the id of a fwnode.
> > + * @fwnode: firmware node
> > + * @id: id of the fwnode
> > + *
> > + * Returns 0 on success or a negative errno.
> > + */
> > +int fwnode_get_id(struct fwnode_handle *fwnode, u32 *id)
> > +{
> > +       unsigned long long adr;
> > +       acpi_status status;
> > +
> > +       if (is_of_node(fwnode)) {
> > +               return of_property_read_u32(to_of_node(fwnode), "reg", id);
> 
> ACPI nodes can hold reg property as well. I would rather think about
> 
> ret = fwnode_property_read_u32(fwnode, "reg", id)
> if (!(ret && is_acpi_node(fwnode)))
>   return ret;
> 
Got it. Will rework on it.
> > +       } else if (is_acpi_node(fwnode)) {
> 
> Redundant 'else'
> 
> > +               status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(fwnode),
> > +                                              METHOD_NAME__ADR, NULL, &adr);
> > +               if (ACPI_FAILURE(status))
> > +                       return -ENODATA;
> 
> I'm wondering if it compiles when CONFIG_ACPI=n.
Correct. It doesn't compile for non-ACPI case. Will resolve it.

Thanks
Calvin