avr32: Reduce DataFlash bus speed to 8 MHz on ATNGW100

Doing this in combination with "atmel_spi: fix hang due to missed
interrupt" appears to eliminate the overruns I'm seeing when using
JFFS2-on-DataFlash as /usr filesystem on the ATNGW100.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index 670c87b..b8286f1 100644 (file)
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -47,7 +47,7 @@ static struct eth_platform_data __initdata eth_data[2];
 static struct spi_board_info spi0_board_info[] __initdata = {
        {
                .modalias       = "mtd_dataflash",
-               .max_speed_hz   = 10000000,
+               .max_speed_hz   = 8000000,
                .chip_select    = 0,
        },
 };