MLK-14938-16 net: fec: do not access reserved register for i.MX8

The MIB RAM and FIFO receive start register does not exist on
i.MX8. Accessing these register will cause SERROR in kernel.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 2a47ebbccb95e8482360813d6dff5288429f1248)
(cherry picked from commit fd99a9f057097a64034cd7b419fd983f487791e4)

diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
index 84f010d..1d064f7 100644 (file)
--- a/drivers/net/fec_mxc.c
+++ b/drivers/net/fec_mxc.c
@@ -603,8 +603,8 @@ static int fec_init(struct eth_device *dev, bd_t *bd)
        writel(0x00000000, &fec->eth->gaddr1);
        writel(0x00000000, &fec->eth->gaddr2);
 
-       /* Do not access reserved register */
-       if (!is_mx6ul() && !is_mx6ull() && !is_imx8m()) {
+       /* Do not access reserved register for i.MX6UL/6ULL/i.MX8/i.MX8M */
+       if (!is_mx6ul() && !is_mx6ull() && !is_imx8() && !is_imx8m()) {
                /* clear MIB RAM */
                for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4)
                        writel(0, i);