From b899fa39019c8fecb508f747525dd8c22622e804 Mon Sep 17 00:00:00 2001 From: Bo Shen <voice.shen@atmel.com> Date: Wed, 17 Jul 2013 17:14:17 +0800 Subject: [PATCH] arm: at91sam9n12: change EBI IO to high drive mode MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 BieÃmann <andreas.devel@googlemail.com> --- board/atmel/at91sam9n12ek/at91sam9n12ek.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/board/atmel/at91sam9n12ek/at91sam9n12ek.c b/board/atmel/at91sam9n12ek/at91sam9n12ek.c index 3013a42a2e..66c4c1f005 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); -- 2.39.5