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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>
This commit is contained in:
Wu, Josh 2012-09-05 22:14:28 +00:00 committed by Andreas Bießmann
parent 057df193b4
commit 1c5794a13e
1 changed files with 4 additions and 0 deletions
board/atmel/at91sam9x5ek
at91sam9x5ek.c

4
board/atmel/at91sam9x5ek/at91sam9x5ek.c
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@ -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 */