From 1c5794a13e9baeafbace8cc1f1890b9e0a3b575c Mon Sep 17 00:00:00 2001 From: "Wu, Josh" Date: Wed, 5 Sep 2012 22:14:28 +0000 Subject: [PATCH] at91sam9x5: set default EBI I/O drive configuration. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Andreas Bießmann --- 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 */