[PATCH v5 08/10] mtd: spi-nor-core: Add Cypress manufacturer ID in set_4byte

[Pratyush Yadav]

On 19/02/21 10:56AM, tkuw584924 at gmail.com wrote:
> From: Takahiro Kuwano <Takahiro.Kuwano at infineon.com>
> 
> Cypress chips support SPINOR_OP_EN4B(B7h)/SPINOR_OP_EX4B(E9h) to

The datasheet says the EN4B command is indeed B7h but EX4B is listed as 
B8h. The command E9h is for "Password Unlock". So exiting 4 byte mode 
will do something completely different.

> enable/disable 4-byte addressing mode.
> 
> Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano at infineon.com>
> ---
>  drivers/mtd/spi/spi-nor-core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
> index 46948ed41b..8d63681cb3 100644
> --- a/drivers/mtd/spi/spi-nor-core.c
> +++ b/drivers/mtd/spi/spi-nor-core.c
> @@ -492,6 +492,7 @@ static int set_4byte(struct spi_nor *nor, const struct flash_info *info,
>  	case SNOR_MFR_ISSI:
>  	case SNOR_MFR_MACRONIX:
>  	case SNOR_MFR_WINBOND:
> +	case SNOR_MFR_CYPRESS:
>  		if (need_wren)
>  			write_enable(nor);
>  
> -- 
> 2.25.1
> 

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.