linux-kernel - [PATCH net-next 3/3] of_net: add property "nvmem-mac-address" for of_get_mac

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Date:   Fri,  9 Apr 2021 16:37:51 +0800
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     davem@...emloft.net, kuba@...nel.org, robh+dt@...nel.org,
        andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        frowand.list@...il.com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/3] of_net: add property "nvmem-mac-address" for of_get_mac_addr()

From: Fugang Duan <fugang.duan@....com>

If MAC address read from nvmem cell and it is valid mac address,
.of_get_mac_addr_nvmem() add new property "nvmem-mac-address" in
ethernet node. Once user call .of_get_mac_address() to get MAC
address again, it can read valid MAC address from device tree in
directly.

Signed-off-by: Fugang Duan <fugang.duan@....com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
---
 drivers/of/of_net.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/of_net.c b/drivers/of/of_net.c
index 6e411821583e..20c3ae17f95f 100644
--- a/drivers/of/of_net.c
+++ b/drivers/of/of_net.c
@@ -116,6 +116,10 @@ const void *of_get_mac_address(struct device_node *np)
 	if (addr)
 		return addr;
 
+	addr = of_get_mac_addr(np, "nvmem-mac-address");
+	if (addr)
+		return addr;
+
 	return of_get_mac_addr_nvmem(np);
 }
 EXPORT_SYMBOL(of_get_mac_address);
-- 
2.17.1