From: Rob Herring <robh@kernel.org>
To: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
"Jakub Kicinski" <kuba@kernel.org>,
"Felix Fietkau" <nbd@nbd.name>, "John Crispin" <john@phrozen.org>,
"Sean Wang" <sean.wang@mediatek.com>,
"Mark Lee" <Mark-MC.Lee@mediatek.com>,
"Matthias Brugger" <matthias.bgg@gmail.com>,
"Russell King" <linux@armlinux.org.uk>,
netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
"René van Dorst" <opensource@vdorst.com>
Subject: Re: [PATCH net-next v2 2/2] net: ethernet: mediatek: support custom GMAC label
Date: Tue, 20 Apr 2021 14:51:32 -0500 [thread overview]
Message-ID: <20210420195132.GA3686955@robh.at.kernel.org> (raw)
In-Reply-To: <20210419154659.44096-3-ilya.lipnitskiy@gmail.com>
On Mon, Apr 19, 2021 at 08:46:59AM -0700, Ilya Lipnitskiy wrote:
> The MAC device name can now be set within DTS file instead of always
> being "ethX". This is helpful for DSA to clearly label the DSA master
> device and distinguish it from DSA slave ports.
>
> For example, some devices, such as the Ubiquiti EdgeRouter X, may have
> ports labeled ethX. Labeling the master GMAC with a different prefix
> than DSA ports helps with clarity.
>
> Suggested-by: René van Dorst <opensource@vdorst.com>
> Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
> ---
> drivers/net/ethernet/mediatek/mtk_eth_soc.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> index 6b00c12c6c43..df3cda63a8c5 100644
> --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
> @@ -2845,6 +2845,7 @@ static const struct net_device_ops mtk_netdev_ops = {
>
> static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
> {
> + const char *label = of_get_property(np, "label", NULL);
> const __be32 *_id = of_get_property(np, "reg", NULL);
> phy_interface_t phy_mode;
> struct phylink *phylink;
> @@ -2867,9 +2868,10 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
> return -EINVAL;
> }
>
> - eth->netdev[id] = alloc_etherdev(sizeof(*mac));
> + eth->netdev[id] = alloc_netdev(sizeof(*mac), label ? label : "eth%d",
> + NET_NAME_UNKNOWN, ether_setup);
'label' is generally supposed to correspond to the sticker for the
device connector for a human to id. I can't really tell if that's the
case here. I don't see how 'gmacX' vs. 'ethX' maps to DSA master vs.
slave.
I don't think this should be handled within a specific driver either. If
we're going to have a way to name things, then fix it in
alloc_etherdev().
It can also be argued that device naming for userspace is a userspace
(udev) problem.
Rob
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next prev parent reply other threads:[~2021-04-20 19:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-19 15:46 [PATCH net-next v2 0/2] net: ethernet: mediatek: support custom GMAC label Ilya Lipnitskiy
2021-04-19 15:46 ` [PATCH net-next v2 1/2] dt-bindings: net: mediatek: add optional GMAC labels Ilya Lipnitskiy
2021-04-19 15:46 ` [PATCH net-next v2 2/2] net: ethernet: mediatek: support custom GMAC label Ilya Lipnitskiy
2021-04-20 1:22 ` Andrew Lunn
2021-04-20 19:51 ` Rob Herring [this message]
2021-04-20 19:57 ` Ilya Lipnitskiy
2021-04-21 14:04 ` Aw: " Frank Wunderlich
2021-04-21 16:12 ` Rob Herring
2021-04-21 16:48 ` Frank Wunderlich
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