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ethernet: Extend device_get_mac_address() to use NVMEM

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[ Upstream commit d2d3f529e7 ]

A lot of modern SoC have the ability to store MAC addresses in their
NVMEM. So extend the generic function device_get_mac_address() to
obtain the MAC address from an nvmem cell named 'mac-address' in
case there is no firmware node which contains the MAC address directly.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250912140332.35395-3-wahrenst@gmx.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Stefan Wahren
2025-09-12 16:03:32 +02:00
committed by Greg Kroah-Hartman
parent 3671a07759
commit 689ca6be7e
1 changed files with 4 additions and 1 deletions
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5
net/ethernet/eth.c
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@@ -613,7 +613,10 @@ EXPORT_SYMBOL(fwnode_get_mac_address);
*/
int device_get_mac_address(struct device *dev, char *addr)
{
return fwnode_get_mac_address(dev_fwnode(dev), addr);
if (!fwnode_get_mac_address(dev_fwnode(dev), addr))
return 0;
return nvmem_get_mac_address(dev, addr);
}
EXPORT_SYMBOL(device_get_mac_address);