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authorBo Shen <voice.shen@atmel.com>2013-07-17 17:14:17 +0800
committerTom Rini <trini@ti.com>2013-07-22 08:20:14 -0400
commitb899fa39019c8fecb508f747525dd8c22622e804 (patch)
tree01cf4a10d54286e805b1d375cef74427e7c62136 /board/atmel
parentfdf86c202c17adfc6f6313dc35f685b1d22b8125 (diff)
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arm: at91sam9n12: change EBI IO to high drive mode
As both the DDR SDRAM and NAND flash connect to EBI on at91sam9n12 and share the lower 8 bits data line. If use low drive of the data line, it will cause DDR data access corrupt in lower address, so change the data line to high drive mode This will fix the Linux kernel boot issue when use Lower address Signed-off-by: Bo Shen <voice.shen@atmel.com> Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'board/atmel')
-rw-r--r--board/atmel/at91sam9n12ek/at91sam9n12ek.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/board/atmel/at91sam9n12ek/at91sam9n12ek.c b/board/atmel/at91sam9n12ek/at91sam9n12ek.c
index 3013a42..66c4c1f 100644
--- a/board/atmel/at91sam9n12ek/at91sam9n12ek.c
+++ b/board/atmel/at91sam9n12ek/at91sam9n12ek.c
@@ -59,7 +59,7 @@ static void at91sam9n12ek_nand_hw_init(void)
/* Configure databus */
csa &= ~AT91_MATRIX_NFD0_ON_D16; /* nandflash connect to D0~D15 */
/* Configure IO drive */
- csa &= ~AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
+ csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
writel(csa, &matrix->ebicsa);