[U-Boot] [PATCH] KARO TX25: Fix NAND Flash R/W cycle times

Stefano Babic sbabic at denx.de
Sun Sep 23 20:01:50 CEST 2012


On 08/08/2012 15:55, Benoît Thébaudeau wrote:
> The NAND Flash of the KARO TX25 board is a Samsung K9F1G08U0B with 25-ns R/W
> cycle times. However, the NFC clock for this board was set to 66.5 MHz, so using
> the NFC driver in symmetric mode (i.e. 1 NFC clock cycle = 1 NF R/W cycle)
> resulted in NF R/W cycle times of 15 ns, hence corrupted NF accesses.
> 
> This patch fixes this issue by setting the NFC clock to the highest frequency
> complying to the 25-ns NF R/W cycle times specification, i.e. 33.25 MHz.
> 

Applied to u-boot-imx(fix), thanks.

Best regards,
Stefano Babic

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