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kernel: make mtd mac address increment more flexible

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Allow selecting the byte on which the increment should be added.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-08-20 11:10:27 +02:00
parent e882e63f1e
commit a1f4ebcc87
1 changed files with 9 additions and 3 deletions
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12
target/linux/generic/pending-4.14/681-NET-add-of_get_mac_address_mtd.patch
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@ -32,7 +32,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
{
struct property *pp = of_find_property(np, name, NULL);
@@ -47,6 +48,73 @@ static const void *of_get_mac_addr(struc
@@ -47,6 +48,79 @@ static const void *of_get_mac_addr(struc
return NULL;
}
@ -50,6 +50,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ u32 mac_inc = 0;
+ u8 mac[ETH_ALEN];
+ void *addr;
+ u32 inc_idx;
+
+ list = of_get_property(np, "mtd-mac-address", &size);
+ if (!list || (size != (2 * sizeof(*list))))
@ -73,8 +74,13 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac);
+ put_mtd_device(mtd);
+
+ if (of_property_read_u32(np, "mtd-mac-address-increment-byte", &inc_idx))
+ inc_idx = 5;
+ if (inc_idx > 5)
+ return NULL;
+
+ if (!of_property_read_u32(np, "mtd-mac-address-increment", &mac_inc))
+ mac[5] += mac_inc;
+ mac[inc_idx] += mac_inc;
+
+ if (!is_valid_ether_addr(mac))
+ return NULL;
@ -106,7 +112,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/**
* 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
@@ -64,11 +132,18 @@ static const void *of_get_mac_addr(struc
@@ -64,11 +138,18 @@ 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.