Re: [PATCH 03/14] net: davicom: dm9000: allow to pass MAC address through mac_addr module parameter

Geert Uytterhoeven
2020-02-12T08:08:05Z

On Tue, Feb 11, 2020 at 11:25 PM Andrew Lunn <andrew@lunn.ch> wrote:
> On Tue, Feb 11, 2020 at 10:41:20PM +0100, H. Nikolaus Schaller wrote:
> > This is needed to give the MIPS Ingenic CI20 board a stable MAC address
> > which can be optionally provided by vendor U-Boot.
> >
> > For get_mac_addr() we use an adapted copy of from ksz884x.c which
> > has very similar functionality.
> >
> > Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
>
> Hi Nikolaus
>
> Please split these patches by subsystem. So this one patch needs to go
> via netdev.
>
> > +static char *mac_addr = ":";
> > +module_param(mac_addr, charp, 0);
> > +MODULE_PARM_DESC(mac_addr, "MAC address");
>
> Module parameters are not liked.
>
> Can it be passed via device tree? The driver already has code to get
> it out of the device tree.

Yep, typically U-Boot adds an appropriate "local-mac-address" property to the
network device's device node, based on the "ethernet0" alias.

However, the real clue here may be "vendor U-Boot", i.e. no support for the
above?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds