Re: [PATCH 7/9] Bluetooth: hci_sync: Add NVMEM-backed BD address retrieval

Andrew Lunn
2026-04-29T13:16:06Z

On Wed, Apr 29, 2026 at 10:53:13AM +0200, Bartosz Golaszewski wrote:
> On Tue, Apr 28, 2026 at 4:23 PM Loic Poulain
> <loic.poulain@oss.qualcomm.com> wrote:
> >
> > Some devices store the Bluetooth BD address in non-volatile
> > memory, which can be accessed through the NVMEM framework.
> > Similar to Ethernet or WiFi MAC addresses, add support for
> > reading the BD address from a 'local-bd-address' NVMEM cell.
> >
> > As with the device-tree provided BD address, add a quirk to
> > indicate whether a device or platform should attempt to read
> > the address from NVMEM when no valid in-chip address is present.
> > Also add a quirk to indicate if the address is stored in
> > big-endian byte order.
> >
> > Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> > ---
>
> Is there any reason why we can't extend the existing
> of_get_mac_address() with another property name and use it here? It
> already has support for mac addresses from nvmem.

Does it even need to be a different property name? Is a bluetooth MAC
address somehow different to an Ethernet MAC address? Isn't it just a
EUI-48, independent of it being Ethernet, Bluetooth, wifi, fddi, token
ring, homing pigeon?

Andrew