[U-Boot] [PATCH] net: configure DWMAC DMA by default AXI burst length

[Sonic Zhang]

Hi Joe,

On Wed, Jan 28, 2015 at 4:43 AM, Joe Hershberger
<joe.hershberger at gmail.com> wrote:
> On Mon, Jan 26, 2015 at 8:54 PM, <sonic.adi at gmail.com> wrote:
>>
>> From: Sonic Zhang <sonic.zhang at analog.com>
>>
>> Board can define its own AXI burst length to improve DWMAC DMA
>> performance.
>>
>> Signed-off-by: Sonic Zhang <sonic.zhang at analog.com>
>> ---
>>
>>  drivers/net/designware.c |    2 ++
>>  drivers/net/designware.h |    5 +++++
>>  2 files changed, 7 insertions(+)
>>
>> diff --git a/drivers/net/designware.c b/drivers/net/designware.c
>> index 9ded895..d8d6792 100644
>> --- a/drivers/net/designware.c
>> +++ b/drivers/net/designware.c
>> @@ -256,6 +256,8 @@ static int dw_eth_init(struct eth_device *dev, bd_t
>> *bis)
>>
>>         writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
>>
> This should probably include:
> +#if CONFIG_DW_AXI_BURST_LEN
> so that this register is only accessed if configured.

CONFIG_DW_AXI_BURST_LEN is always defined in designware.h in the same patch.

+/* Default AXI BUS Burst length */
+#ifndef CONFIG_DW_AXI_BURST_LEN
+#define CONFIG_DW_AXI_BURST_LEN 0
+#endif
+

Regards,

Sonic