linux-kernel - Re: [PATCH 1/3] net: ocelot: add support to get mac from device-tree

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Date:   Thu, 28 Oct 2021 14:06:12 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Clément Léger <clement.leger@...tlin.com>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        Andrew Lunn <andrew@...n.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] net: ocelot: add support to get mac from device-tree

On Thu, Oct 28, 2021 at 03:49:30PM +0200, Clément Léger wrote:
> Add support to get mac from device-tree using of_get_mac_address.
> 
> Signed-off-by: Clément Léger <clement.leger@...tlin.com>
> ---
>  drivers/net/ethernet/mscc/ocelot_vsc7514.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> index d51f799e4e86..c39118e5b3ee 100644
> --- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> +++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> @@ -526,7 +526,10 @@ static int ocelot_chip_init(struct ocelot *ocelot, const struct ocelot_ops *ops)
>  
>  	ocelot_pll5_init(ocelot);
>  
> -	eth_random_addr(ocelot->base_mac);
> +	ret = of_get_mac_address(ocelot->dev->of_node, ocelot->base_mac);

Why not per port? This is pretty strange, I think.

> +	if (ret)
> +		eth_random_addr(ocelot->base_mac);
> +
>  	ocelot->base_mac[5] &= 0xf0;
>  
>  	return 0;
> -- 
> 2.33.0
>