* [U-Boot] [PATCH] at91sam9x5: set default EBI I/O drive configuration.
@ 2012-09-06 8:14 Josh Wu
2012-09-13 12:33 ` Andreas Bießmann
0 siblings, 1 reply; 2+ messages in thread
From: Josh Wu @ 2012-09-06 8:14 UTC (permalink / raw)
To: u-boot
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>
---
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 */
--
1.7.9.5
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [U-Boot] [PATCH] at91sam9x5: set default EBI I/O drive configuration.
2012-09-06 8:14 [U-Boot] [PATCH] at91sam9x5: set default EBI I/O drive configuration Josh Wu
@ 2012-09-13 12:33 ` Andreas Bießmann
0 siblings, 0 replies; 2+ messages in thread
From: Andreas Bießmann @ 2012-09-13 12:33 UTC (permalink / raw)
To: u-boot
Dear Josh Wu,
On 06.09.2012 10:14, Josh Wu wrote:
> 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>
> ---
applied to u-boot-atmel/master, thanks!
Best regards
Andreas Bie?mann
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2012-09-06 8:14 [U-Boot] [PATCH] at91sam9x5: set default EBI I/O drive configuration Josh Wu
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