MIPS: au1000_eth: Get ethernet address from platform_data

au1000_eth uses firmware calls to get a valid MAC address, and changes
it depending on platform device id.  This patch moves this logic out of
the driver into the platform device registration part, where boards with
supported chips can use whatever firmware interface they need; the default
implementation maintains compatibility with existing, YAMON-based firmware.

Tested-by: Wolfgang Grandegger <wg@denx.de>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: Linux-MIPS <linux-mips@linux-mips.org>
Cc: netdev@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1481/
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c
index c233d64a0d60..1dc55ee2681b 100644
--- a/arch/mips/alchemy/common/platform.c
+++ b/arch/mips/alchemy/common/platform.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
 #include <linux/platform_device.h>
 #include <linux/serial_8250.h>
 #include <linux/init.h>
@@ -21,6 +22,8 @@
 #include <asm/mach-au1x00/au1100_mmc.h>
 #include <asm/mach-au1x00/au1xxx_eth.h>
 
+#include <prom.h>
+
 #define PORT(_base, _irq)                                       \
         {                                                       \
                 .mapbase        = _base,                        \
@@ -434,17 +437,27 @@ static int __init au1xxx_platform_init(void)
 {
         unsigned int uartclk = get_au1x00_uart_baud_base() * 16;
         int err, i;
+        unsigned char ethaddr[6];
 
         /* Fill up uartclk. */
         for (i = 0; au1x00_uart_data[i].flags; i++)
                 au1x00_uart_data[i].uartclk = uartclk;
 
+        /* use firmware-provided mac addr if available and necessary */
+        i = prom_get_ethernet_addr(ethaddr);
+        if (!i && !is_valid_ether_addr(au1xxx_eth0_platform_data.mac))
+                memcpy(au1xxx_eth0_platform_data.mac, ethaddr, 6);
+
         err = platform_add_devices(au1xxx_platform_devices,
                                    ARRAY_SIZE(au1xxx_platform_devices));
 #ifndef CONFIG_SOC_AU1100
+        ethaddr[5] += 1;        /* next addr for 2nd MAC */
+        if (!i && !is_valid_ether_addr(au1xxx_eth1_platform_data.mac))
+                memcpy(au1xxx_eth1_platform_data.mac, ethaddr, 6);
+
         /* Register second MAC if enabled in pinfunc */
         if (!err && !(au_readl(SYS_PINFUNC) & (u32)SYS_PF_NI2))
-                platform_device_register(&au1xxx_eth1_device);
+                err = platform_device_register(&au1xxx_eth1_device);
 #endif
 
         return err;