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69 lines
1.9 KiB
69 lines
1.9 KiB
From: Tim Harvey <tharvey@gateworks.com>
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Subject: [PATCH] sky2: allow mac to come from dt
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The driver reads the mac address from the device registers which would
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need to have been programmed by the bootloader. This patch adds
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the ability to pull the mac from devicetree via the aliases/sky2 node.
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Signed-off-by: Tim Harvey <tharvey@gateworks.com>
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---
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drivers/net/ethernet/marvell/sky2.c | 33 ++++++++++++++++++++++++++++++++-
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1 file changed, 32 insertions(+), 1 deletion(-)
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--- a/drivers/net/ethernet/marvell/sky2.c
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+++ b/drivers/net/ethernet/marvell/sky2.c
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@@ -44,6 +44,8 @@
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#include <linux/prefetch.h>
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#include <linux/debugfs.h>
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#include <linux/mii.h>
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+#include <linux/of_device.h>
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+#include <linux/of_net.h>
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#include <asm/irq.h>
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@@ -4748,6 +4750,7 @@ static struct net_device *sky2_init_netd
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{
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struct sky2_port *sky2;
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struct net_device *dev = alloc_etherdev(sizeof(*sky2));
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+ unsigned char *iap, tmpaddr[ETH_ALEN];
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if (!dev)
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return NULL;
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@@ -4805,8 +4808,36 @@ static struct net_device *sky2_init_netd
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dev->features |= dev->hw_features;
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+ /*
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+ * try to get mac address in the following order:
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+ * 1) from device tree data
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+ * 2) from internal registers set by bootloader
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+ */
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+ iap = NULL;
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+ if (IS_ENABLED(CONFIG_OF)) {
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+ struct device_node *np;
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+ np = of_find_node_by_path("/aliases");
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+ if (np) {
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+ const char *path = of_get_property(np, "sky2", NULL);
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+ if (path)
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+ np = of_find_node_by_path(path);
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+ if (np)
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+ path = of_get_mac_address(np);
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+ if (path)
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+ iap = (unsigned char *) path;
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+ }
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+ }
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+
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+ /*
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+ * 2) mac registers set by bootloader
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+ */
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+ if (!iap || !is_valid_ether_addr(iap)) {
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+ memcpy_fromio(&tmpaddr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN);
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+ iap = &tmpaddr[0];
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+ }
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+
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/* read the mac address */
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- memcpy_fromio(dev->dev_addr, hw->regs + B2_MAC_1 + port * 8, ETH_ALEN);
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+ memcpy(dev->dev_addr, iap, ETH_ALEN);
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return dev;
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}
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