[U-Boot] [PATCH] nios2: reset cfi flash before reading env

[Thomas Chou <thomas@wytron.com.tw>]

On 01/05/2011 04:15 PM, Wolfgang Denk wrote:
> Instead of making fixed assumptions about flash type and it's
> properties here you should use generic routines from the CFI driver to
> do the reset.
>

Dear Wolfgang,

env_init() goes before flash_init() in board.c. So we don't know the 
flash type and cannot use those generic cfi routines based on flash_info.

I followed this in cfi_flash.c

void __flash_cmd_reset(flash_info_t *info)
{
	/*
	 * We do not yet know what kind of commandset to use, so we issue
	 * the reset command in both Intel and AMD variants, in the hope
	 * that AMD flash roms ignore the Intel command.
	 */
	flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
	flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
}

I am not sure if this thing should be added to generic code, because I 
found powerpc skiped flash_init when board_flash_wp_on in board.c.

Best regards,
Thomas