[U-Boot] [U-Boot, v2, 4/6] board/ti/am43xx: add support for parallel NAND

[Tom Rini]

On Tue, Jul 22, 2014 at 04:03:22PM +0530, pekon gupta wrote:

> This patch adds support for NAND device connected to GPMC chip-select on
> following AM43xx EVM boards.
> 
> am437x-gp-evm: On this board, NAND Flash signals are muxed with eMMC, thus at a
>   time either eMMC or NAND can be enabled. Selection between eMMC and NAND is
>   controlled by:
>   (a) Statically using Jumper on connecter (J89) present on board.
>   (a) If Jumper on J89 is NOT used, then selection can be dynamically controlled
>       by driving SPI2_CS0[MUX_MODE=GPIO] pin via software:
>       SPI2_CS0 == 0: NAND (default)
>       SPI2_CS0 == 1: eMMC
> 
> am43x-epos-evm: On this board, NAND Flash control lines are muxed with QSPI,
>   Thus only one of the two can be used at a time. Selection is controlled by:
>   (a) Dynamically driving following GPIO pin from software
>       GPMC_A0(GPIO) == 0 NAND is selected (default)
> 
> NAND device (MT29F4G08AB) on these boards has:
>  - data-width=8bits
>  - blocksize=256KB
>  - pagesize=4KB
>  - oobsize=224 bytes
> For above NAND device, ROM code expects the boot-loader to be flashed in BCH16
> ECC scheme for NAND boot, So by default BCH16 ECC is enabled for AM43xx EVMs.
> 
> Signed-off-by: Pekon Gupta <pekon at ti.com>

Applied to u-boot-ti/master, thanks!

-- 
Tom
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