The MIB RAM and FIFO receive start register does not exist on i.MX6UL. Accessing these register will cause enet not work well.
Signed-off-by: Peng Fan Peng.Fan@freescale.com Signed-off-by: Fugang Duan B38611@freescale.com Cc: Joe Hershberger joe.hershberger@ni.com Cc: Stefano Babic sbabic@denx.de ---
Changes v2: Using runtime check, but not hardcoding "#ifdef". This patch depends on the runtime checking patch: https://patchwork.ozlabs.org/patch/505621/.
drivers/net/fec_mxc.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c index c5dcbbb..bff5fd1 100644 --- a/drivers/net/fec_mxc.c +++ b/drivers/net/fec_mxc.c @@ -17,6 +17,7 @@
#include <asm/arch/clock.h> #include <asm/arch/imx-regs.h> +#include <asm/imx-common/sys_proto.h> #include <asm/io.h> #include <asm/errno.h> #include <linux/compiler.h> @@ -551,12 +552,15 @@ static int fec_init(struct eth_device *dev, bd_t* bd) writel(0x00000000, &fec->eth->gaddr2);
- /* clear MIB RAM */ - for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4) - writel(0, i); + /* Do not access reserved register for i.MX6UL */ + if (!is_cpu_type(MXC_CPU_MX6UL)) { + /* clear MIB RAM */ + for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4) + writel(0, i);
- /* FIFO receive start register */ - writel(0x520, &fec->eth->r_fstart); + /* FIFO receive start register */ + writel(0x520, &fec->eth->r_fstart); + }
/* size and address of each buffer */ writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr);