MLK-12766 net: fec: do not access reserved register for i.MX6ULL

The MIB RAM and FIFO receive start register does not exist on
i.MX6ULL. Accessing these register will cause enet not work well or
cause system report fault.

Reported-by: Bai Ping <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 5fb09cab9bb3cc4cef02239299d02cec666396ab)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 9b9556e..81e4e1c 100644 (file)
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -565,7 +565,7 @@ static int fec_init(struct eth_device *dev, bd_t *bd)
        writel(0x00000000, &fec->eth->gaddr2);
 
        /* Do not access reserved register for i.MX6UL */
-       if (!is_mx6ul()) {
+       if (!is_mx6ul() && !is_mx6ull()) {
                /* clear MIB RAM */
                for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4)
                        writel(0, i);