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net: davinci_emac: match the mdio device against its compatible if possible

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[ Upstream commit ea0820bb771175c7d4192fc6f5b5c56b3c6d5239 ]

Device tree based systems without of_dev_auxdata will have the mdio
device named differently than "davinci_mdio(.0)". In this case use the
device's parent's compatible string for matching

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bartosz Golaszewski 2018-06-20 10:03:56 +02:00 • committed by Greg Kroah-Hartman
parent d68db3d997
commit 39565a7d63
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/ti/davinci_emac.c
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@ -1517,6 +1517,10 @@ static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd)
static int match_first_device(struct device *dev, void *data)
{
if (dev->parent && dev->parent->of_node)
return of_device_is_compatible(dev->parent->of_node,
"ti,davinci_mdio");
return !strncmp(dev_name(dev), "davinci_mdio", 12);
}