This patch configure at91sam9x5's EBI drive I/O. Without this, When SD card boot, the nand flash read/write are not stable. Which will cause kernel MTD test fail (Since mainline kernel doesn't configure the EBI register).

Signed-off-by: Josh Wu josh.wu@atmel.com --- board/atmel/at91sam9x5ek/at91sam9x5ek.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/board/atmel/at91sam9x5ek/at91sam9x5ek.c b/board/atmel/at91sam9x5ek/at91sam9x5ek.c index ae408bc..06028aa 100644 --- a/board/atmel/at91sam9x5ek/at91sam9x5ek.c +++ b/board/atmel/at91sam9x5ek/at91sam9x5ek.c @@ -62,6 +62,10 @@ static void at91sam9x5ek_nand_hw_init(void) csa |= AT91_MATRIX_EBI_CS3A_SMC_SMARTMEDIA; /* NAND flash on D16 */ csa |= AT91_MATRIX_NFD0_ON_D16; + + /* Configure IO drive */ + csa &= ~AT91_MATRIX_EBI_EBI_IOSR_NORMAL; + writel(csa, &matrix->ebicsa);

/* Configure SMC CS3 for NAND/SmartMedia */