[PATCH] mtd: spi-nor-ids: add dual and quad mode support to mx25l12805d

[Pratyush Yadav]

Hi Stefan,

On 11/03/21 10:55AM, Stefan Herbrechtsmeier wrote:
> From: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
> 
> The NOR flash MX25L12835F reuse the JEDEC ID of the MX25l12805D but
> supports dual and quad mode.

There is some discussion going on over at the Linux side [0] about these 
two flashes and how to properly support them. I suggest this you hold on 
to this patch until a proper solution is found and agreed upon for this. 
Or even better, you can help drive the solution forward on Linux as 
well.

[0] https://lore.kernel.org/linux-mtd/CAEyMn7ZEp9f1SuE6umRDWkr8bVT5hdRi-4F3+G-GP9anuGG1Bw@mail.gmail.com/t/

> 
> Datasheet: https://www.macronix.com/Lists/Datasheet/Attachments/7321/MX25L12805D,%203V,%20128Mb,%20v1.2.pdf
> Datasheet: https://www.macronix.com/Lists/Datasheet/Attachments/7397/MX25L12835F,%203V,%20128Mb,%20v1.6.pdf
> 
> Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier at weidmueller.com>
> 
> ---
> 
>  drivers/mtd/spi/spi-nor-ids.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi/spi-nor-ids.c b/drivers/mtd/spi/spi-nor-ids.c
> index 2b57797954..f6de2fb1b8 100644
> --- a/drivers/mtd/spi/spi-nor-ids.c
> +++ b/drivers/mtd/spi/spi-nor-ids.c
> @@ -155,7 +155,7 @@ const struct flash_info spi_nor_ids[] = {
>  	{ INFO("mx25u1635e",  0xc22535, 0, 64 * 1024,  32, SECT_4K) },
>  	{ INFO("mx25u3235f",  0xc22536, 0, 4 * 1024,  1024, SECT_4K) },
>  	{ INFO("mx25u6435f",  0xc22537, 0, 64 * 1024, 128, SECT_4K) },
> -	{ INFO("mx25l12805d", 0xc22018, 0, 64 * 1024, 256, SECT_4K) },
> +	{ INFO("mx25l12805d", 0xc22018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
>  	{ INFO("mx25u12835f", 0xc22538, 0, 64 * 1024, 256, SECT_4K) },
>  	{ INFO("mx25l12855e", 0xc22618, 0, 64 * 1024, 256, 0) },
>  	{ INFO("mx25l25635e", 0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> -- 
> 2.20.1
> 

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.