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 <b...@simtec.co.uk> Cc: Tristram Ha <tristram...@micrel.com> Cc: David J. Choi <david.c...@micrel.com> Signed-off-by: Lukas Wunner <lu...@wunner.de> --- We're using this small patch on the "Revolution Pi" family of open source PLCs (https://revolution.kunbus.com/) and would love to see it mainlined. Thanks! drivers/net/ethernet/micrel/ks8851.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c index 2fe96f1f3fe5..bd6e9014bc74 100644 --- a/drivers/net/ethernet/micrel/ks8851.c +++ b/drivers/net/ethernet/micrel/ks8851.c @@ -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)) -- 2.15.1
