kernel: fold of_get_mac_address_mtd into of_get_mac_address

This makes it easier to keep drivers in sync with upstream

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@48026 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 56 insertions, 29 deletions

diff --git a/target/linux/generic/patches-4.4/681-NET-add-of_get_mac_address_mtd.patch b/target/linux/generic/patches-4.4/681-NET-add-of_get_mac_address_mtd.patch
index 688cf6e44a..0026f12c9e 100644
--- a/target/linux/generic/patches-4.4/681-NET-add-of_get_mac_address_mtd.patch
+++ b/target/linux/generic/patches-4.4/681-NET-add-of_get_mac_address_mtd.patch
@@ -1,6 +1,6 @@
 From: John Crispin <blogic@openwrt.org>
 Date: Sun, 27 Jul 2014 09:40:01 +0100
-Subject: NET: add of_get_mac_address_mtd()
+Subject: NET: add mtd-mac-address support to of_get_mac_address()
 
 Many embedded devices have information such as mac addresses stored inside mtd
 devices. This patch allows us to add a property inside a node describing a
@@ -8,6 +8,7 @@ network interface. The new property points at a mtd partition with an offset
 where the mac address can be found.
 
 Signed-off-by: John Crispin <blogic@openwrt.org>
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
 ---
  drivers/of/of_net.c    |   37 +++++++++++++++++++++++++++++++++++++
  include/linux/of_net.h |    1 +
@@ -23,15 +24,15 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  
  /**
   * of_get_phy_mode - Get phy mode for given device_node
-@@ -80,3 +81,45 @@ const void *of_get_mac_address(struct de
- 	return of_get_mac_addr(np, "address");
+@@ -47,6 +48,66 @@ static const void *of_get_mac_addr(struc
+ 	return NULL;
  }
- EXPORT_SYMBOL(of_get_mac_address);
-+
-+#ifdef CONFIG_MTD
-+int of_get_mac_address_mtd(struct device_node *np, unsigned char *mac)
+ 
++static const void *of_get_mac_address_mtd(struct device_node *np)
 +{
++#ifdef CONFIG_MTD
 +	struct device_node *mtd_np = NULL;
++	struct property *prop;
 +	size_t retlen;
 +	int size, ret;
 +	struct mtd_info *mtd;
@@ -39,17 +40,18 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	const __be32 *list;
 +	phandle phandle;
 +	u32 mac_inc = 0;
++	u8 mac[ETH_ALEN];
 +
 +	list = of_get_property(np, "mtd-mac-address", &size);
 +	if (!list || (size != (2 * sizeof(*list))))
-+		return -ENOENT;
++		return NULL;
 +
 +	phandle = be32_to_cpup(list++);
 +	if (phandle)
 +		mtd_np = of_find_node_by_phandle(phandle);
 +
 +	if (!mtd_np)
-+		return -ENOENT;
++		return NULL;
 +
 +	part = of_get_property(mtd_np, "label", NULL);
 +	if (!part)
@@ -57,7 +59,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +
 +	mtd = get_mtd_device_nm(part);
 +	if (IS_ERR(mtd))
-+		return PTR_ERR(mtd);
++		return NULL;
 +
 +	ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac);
 +	put_mtd_device(mtd);
@@ -65,24 +67,49 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	if (!of_property_read_u32(np, "mtd-mac-address-increment", &mac_inc))
 +		mac[5] += mac_inc;
 +
-+	return ret;
-+}
-+EXPORT_SYMBOL_GPL(of_get_mac_address_mtd);
++	if (!is_valid_ether_addr(mac))
++		return NULL;
++
++	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
++	if (!prop)
++		return NULL;
++
++	prop->name = "mac-address";
++	prop->length = ETH_ALEN;
++	prop->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL);
++	if (!prop->value || of_add_property(np, prop))
++		goto free;
++
++	return prop->value;
++free:
++	kfree(prop->value);
++	kfree(prop);
 +#endif
---- a/include/linux/of_net.h
-+++ b/include/linux/of_net.h
-@@ -13,6 +13,14 @@
- struct net_device;
- extern int of_get_phy_mode(struct device_node *np);
- extern const void *of_get_mac_address(struct device_node *np);
-+#ifdef CONFIG_MTD
-+extern int of_get_mac_address_mtd(struct device_node *np, unsigned char *mac);
-+#else
-+static inline int of_get_mac_address_mtd(struct device_node *np, unsigned char *mac)
-+{
-+	return -ENOENT;
++	return NULL;
 +}
-+#endif
- extern struct net_device *of_find_net_device_by_node(struct device_node *np);
- #else
- static inline int of_get_phy_mode(struct device_node *np)
++
+ /**
+  * Search the device tree for the best MAC address to use.  'mac-address' is
+  * checked first, because that is supposed to contain to "most recent" MAC
+@@ -64,6 +125,9 @@ static const void *of_get_mac_addr(struc
+  * addresses.  Some older U-Boots only initialized 'local-mac-address'.  In
+  * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+  * but is all zeros.
++ *
++ * If a mtd-mac-address property exists, try to fetch the MAC address from the
++ * specified mtd device, and store it as a 'mac-address' property
+ */
+ const void *of_get_mac_address(struct device_node *np)
+ {
+@@ -77,6 +141,10 @@ const void *of_get_mac_address(struct de
+ 	if (addr)
+ 		return addr;
+ 
+-	return of_get_mac_addr(np, "address");
++	addr = of_get_mac_addr(np, "address");
++	if (addr)
++		return addr;
++
++	return of_get_mac_address_mtd(np);
+ }
+ EXPORT_SYMBOL(of_get_mac_address);