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

[Stefan Herbrechtsmeier]

Hi Pratyush Yadav,

Am 11.03.2021 um 13:15 schrieb Pratyush Yadav:

Hi Stefan,

On 11/03/21 10:55AM, Stefan Herbrechtsmeier wrote:

From: Stefan Herbrechtsmeier <stefan.herbrechtsme...@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.

Thanks for the link.

[0] 
https://lore.kernel.org/linux-mtd/caeymn7zep9f1sue6umrdwkr8bvt5hdri-4f3+g-gp9anugg...@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.herbrechtsme...@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