Re: [PATCH v2 2/2] mtd: spi-nor: Use 4B opcodes when the NOR advertises both 3B and 4B

[Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>]

On 18/10/2018 13:55:12+0200, Boris Brezillon wrote:
> When the NOR supports 4 bytes opcodes we should use those instead of
> switching the flash in 4-bytes mode. This way, we don't have to restore
> the addressing mode when resetting the board.
> 
> Reported-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Tested-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
> ---
> Changes in v2:
> - None
> ---
>  drivers/mtd/spi-nor/spi-nor.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index 9155d3b9c37b..72536a5dfe05 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -2643,6 +2643,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor,
>  		break;
>  
>  	case BFPT_DWORD1_ADDRESS_BYTES_4_ONLY:
> +	case BFPT_DWORD1_ADDRESS_BYTES_3_OR_4:
>  		nor->flags |= SNOR_F_4B_OPCODES;
>  		nor->addr_width = 4;
>  		break;
> -- 
> 2.14.1
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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