From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lunn Subject: Re: [PATCH net-next v2 4/5] net-next: ethernet: mediatek: add device_node of GMAC pointing into the netdev instance Date: Wed, 22 Mar 2017 19:18:46 +0100 Message-ID: <20170322181846.GN30655@lunn.ch> References: <1490088910-19405-1-git-send-email-sean.wang@mediatek.com> <1490088910-19405-5-git-send-email-sean.wang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1490088910-19405-5-git-send-email-sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org Cc: f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, vivien.didelot-4ysUXcep3aM1wj+D4I0NRVaTQe2KTcn/@public.gmane.org, matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org, Landen.Chao-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, keyhaede-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, objelf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org List-Id: devicetree@vger.kernel.org On Tue, Mar 21, 2017 at 05:35:09PM +0800, sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org wrote: > From: Sean Wang > > the patch adds the setup of the corresponding device node of GMAC into the > netdev instance which could allow other modules such as DSA to find the > instance through the node in dt-bindings using of_find_net_device_by_node() > call. > > Signed-off-by: Sean Wang > --- > drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c > index c21ed99..84b09a4 100644 > --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c > +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c > @@ -2323,6 +2323,8 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np) > eth->netdev[id]->ethtool_ops = &mtk_ethtool_ops; > > eth->netdev[id]->irq = eth->irq[0]; > + eth->netdev[id]->dev.of_node = np; > + Humm, O.K. This is not obvious, until you look at of_dev_node_match() in net-sysfs.c. Most Ethernet drivers don't set netdev.dev.of_node. But they do call SET_NETDEV_DEV(), which sets netdev.dev.parent. of_dev_node_match() first looks at netdev.dev.parent->of_node, and if that does not match, then looks at netdev.dev.of_node. For the mtk Ethernet driver, the parent is not going to work, because of the sub devices. So netdev.dev.of_node does need to be set. Reviewed-by: Andrew Lunn Andrew -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html