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net: ks8851: Support DT-provided MAC address

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Allow the boot loader to specify the MAC address in the device tree
to override the EEPROM, or in case no EEPROM is present.

Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Tristram Ha <tristram.ha@micrel.com>
Cc: David J. Choi <david.choi@micrel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lukas Wunner 2017-12-18 11:17:07 +01:00 committed by David S. Miller
parent e2948dd1b8
commit 566bd54b06
1 changed files with 11 additions and 2 deletions
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13
drivers/net/ethernet/micrel/ks8851.c
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@ -28,6 +28,7 @@
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/of_net.h>
#include "ks8851.h"
@ -407,15 +408,23 @@ static void ks8851_read_mac_addr(struct net_device *dev)
* @ks: The device structure
*
* Get or create the initial mac address for the device and then set that
* into the station address register. If there is an EEPROM present, then
* into the station address register. A mac address supplied in the device
* tree takes precedence. Otherwise, if there is an EEPROM present, then
* we try that. If no valid mac address is found we use eth_random_addr()
* to create a new one.
*/
static void ks8851_init_mac(struct ks8851_net *ks)
{
struct net_device *dev = ks->netdev;
const u8 *mac_addr;
mac_addr = of_get_mac_address(ks->spidev->dev.of_node);
if (mac_addr) {
memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
ks8851_write_mac_addr(dev);
return;
}
/* first, try reading what we've got already */
if (ks->rc_ccr & CCR_EEPROM) {
ks8851_read_mac_addr(dev);
if (is_valid_ether_addr(dev->dev_addr))