Re: [PATCH v21 08/13] mfd: core: Add firmware-node support to MFD cells

[Shivendra Pratap]

On 29-04-2026 15:20, Bartosz Golaszewski wrote:
> On Wed, Apr 29, 2026 at 11:46 AM Shivendra Pratap
> <shivendra.pratap@xxxxxxxxxxxxxxxx> wrote:
> > > > If set, it would be called from MFD core and would do the name lookup
> > > > and return the fwnode which would then be assigned to the cell device?
> >
> > Or should we just drop this patch for fwnode in mfd-core?
> >
> > Export a new call in reboot-mode framework as:
> > reboot_mode_register_node(struct reboot_mode_driver *reboot,
> >                     struct device_node *np / fwnode)
> >
> > Use the parent node in psci-reboot-mode and find reboot-mode and call
> > reboot_mode_register_node?
>
> No, I think the reboot-mode device (as pointed to by the dev field of
> struct reboot_mode_driver) should be associated with the right fwnode
> from the start so it should be handled in MFD core.

Ack. something like should be fine?

drivers/mfd/mfd-core.c :
+       if (!pdev->dev.fwnode && cell->get_fwnode) {
+               fwnode = cell->get_fwnode(parent);
+               if (fwnode)
+                       device_set_node(&pdev->dev, fwnode);
+       }

drivers/mfd/psci-mfd.c (goes next patch):
+static struct fwnode_handle *psci_reboot_mode_get_fwnode(struct device 
*parent)
+{
+       return fwnode_get_named_child_node(dev_fwnode(parent), 
"reboot-mode");
+}

--

thanks,
Shivendra