[PATCH 2/2] fec: add support for IIM stored mac address

[Baruch Siach]

This patch adds support for i.MX25 only, because that's what I have. Extending
this to other i.MX chip should be trivial, given the right IIM_MAC_ADDR define.

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 arch/arm/mach-imx/include/mach/imx25-regs.h |    1 +
 drivers/net/fec_imx.c                       |   10 ++++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-imx/include/mach/imx25-regs.h b/arch/arm/mach-imx/include/mach/imx25-regs.h
index 7c2b5f9..f3da7b5 100644
--- a/arch/arm/mach-imx/include/mach/imx25-regs.h
+++ b/arch/arm/mach-imx/include/mach/imx25-regs.h
@@ -142,6 +142,7 @@
 
 /* IIM fuse definitions */
 #define IIM_UID		0x820
+#define IIM_MAC_ADDR	0x868
 
 #endif /* __ASM_ARCH_MX25_REGS_H */
 
diff --git a/drivers/net/fec_imx.c b/drivers/net/fec_imx.c
index 40a7543..af93eec 100644
--- a/drivers/net/fec_imx.c
+++ b/drivers/net/fec_imx.c
@@ -235,6 +235,16 @@ static void fec_rbd_clean(int last, struct buffer_descriptor *pRbd)
 
 static int fec_get_hwaddr(struct eth_device *dev, unsigned char *mac)
 {
+	int i;
+
+	if (cpu_is_mx25()) {
+		/* get MAC address from the IMM fusebox */
+		for (i = 0; i < 6; i++)
+			mac[i] = readb(IMX_IIM_BASE + IIM_MAC_ADDR + i*4);
+
+		return 0;
+	}
+
 	/* no eeprom */
 	return -1;
 }
-- 
1.7.1