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-rw-r--r--target/linux/imx6/patches-3.12/0050-sky2-allow-mac-to-come-from-dt.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-3.12/0050-sky2-allow-mac-to-come-from-dt.patch b/target/linux/imx6/patches-3.12/0050-sky2-allow-mac-to-come-from-dt.patch
new file mode 100644
index 0000000000..54743a5d99
--- /dev/null
+++ b/target/linux/imx6/patches-3.12/0050-sky2-allow-mac-to-come-from-dt.patch
@@ -0,0 +1,69 @@
+From: Tim Harvey <tharvey@gateworks.com>
+Subject: [PATCH] sky2: allow mac to come from dt
+
+The driver reads the mac address from the device registers which would
+need to have been programmed by the bootloader. This patch adds
+the ability to pull the mac from devicetree via the aliases/sky2 node.
+
+Signed-off-by: Tim Harvey <tharvey@gateworks.com>
+---
+ drivers/net/ethernet/marvell/sky2.c | 33 ++++++++++++++++++++++++++++++++-
+ 1 file changed, 32 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/marvell/sky2.c
++++ b/drivers/net/ethernet/marvell/sky2.c
+@@ -44,6 +44,8 @@
+ #include <linux/prefetch.h>
+ #include <linux/debugfs.h>
+ #include <linux/mii.h>
++#include <linux/of_device.h>
++#include <linux/of_net.h>
+
+ #include <asm/irq.h>
+
+@@ -4748,6 +4750,7 @@ static struct net_device *sky2_init_netd
+ {
+ struct sky2_port *sky2;
+ struct net_device *dev = alloc_etherdev(sizeof(*sky2));
++ unsigned char *iap, tmpaddr[ETH_ALEN];
+
+ if (!dev)
+ return NULL;
+@@ -4802,8 +4805,36 @@ static struct net_device *sky2_init_netd
+
+ dev->features |= dev->hw_features;
+
++ /*
++ * try to get mac address in the following order:
++ * 1) from device tree data
++ * 2) from internal registers set by bootloader
++ */
++ iap = NULL;
++ if (IS_ENABLED(CONFIG_OF)) {
++ struct device_node *np;
++ np = of_find_node_by_path("/aliases");
++ if (np) {
++ const char *path = of_get_property(np, "sky2", NULL);
++ if (path)
++ np = of_find_node_by_path(path);
++ if (np)
++ path = of_get_mac_address(np);
++ if (path)
++ iap = (unsigned char *) path;
++ }
++ }
++
++ /*
++ * 2) mac registers set by bootloader
++ */
++ if (!iap || !is_valid_ether_addr(iap)) {
++ memcpy_fromio(&tmpaddr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN);
++ iap = &tmpaddr[0];
++ }
++
+ /* read the mac address */
+- memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN);
++ memcpy(dev->dev_addr, iap, ETH_ALEN);
+
+ return dev;
+ }