[U-Boot] [PATCH] Correct corrupted NAND Flash access on KARO TX25 modules

[Marek Vasut <marex@denx.de>]

Dear Gachet Daniel,

> This short patch correct corrupted data while reading NAND flash modules on
> the KARO TX25 module.
> 
> The current version of the mxc_nand driver uses the symmetric mode to
> access the NAND flash, but the devices populated on the KARO TX25 only
> support an asymmetric mode (i.MX25: bit 8  within NAND_FLASH_CONFIG1
> register cleared).
> 
> Signed-off-by: Daniel Gachet <daniel.gachet@hefr.ch>
> Cc: Wolfgang Denk <wd@denx.de >
> 
> diff -upr drivers/mtd/nand/mxc_nand.c drivers/mtd/nand/mxc_nand.c
> --- drivers/mtd/nand/mxc_nand.c	2011-12-23 20:25:35.000000000 +0100
> +++ drivers/mtd/nand/mxc_nand.c	2012-03-30 08:10:13.000000000 +0200
> @@ -1290,7 +1290,9 @@ static void mxc_setup_config1(void)
>  	uint16_t tmp;
> 
>  	tmp = readw(&host->regs->nfc_config1);
> +#ifndef MACH_TYPE_TX25
>  	tmp |= NFC_ONE_CYCLE;
> +#endif
>  	tmp |= NFC_4_8N_ECC;
>  	writew(tmp, &host->regs->nfc_config1);
>  	if (host->pagesize_2k)
> 

Won't it be better to make this more generic rather then adding more machine-
specific hacks please?

Best regards,
Marek Vasut