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authorWu, Josh <Josh.wu@atmel.com>2012-09-05 22:14:28 +0000
committerAndreas Bießmann <andreas.devel@googlemail.com>2012-09-13 14:27:28 +0200
commit1c5794a13e9baeafbace8cc1f1890b9e0a3b575c (patch)
tree4e203357effd96fa918ef1cdb8c3470e7f4b2377 /board/atmel/at91sam9x5ek
parent057df193b40d31799d41d43bc832a972f658bfe4 (diff)
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at91sam9x5: set default EBI I/O drive configuration.
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> Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'board/atmel/at91sam9x5ek')
-rw-r--r--board/atmel/at91sam9x5ek/at91sam9x5ek.c4
1 files changed, 4 insertions, 0 deletions
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 */