[PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

[PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

[Michael Walle]

Commit 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
removed the flags for non-SFDP devices. It was assumed that it wasn't in
use anymore. This wasn't true. Add the no_sfdp_flags as well as the size
again.

We add the additional flags for dual and quad read because they have
been reported to work properly by Hartmut using both older and newer
versions of this flash, the similar flashes with 64Mbit and 256Mbit
already have these flags and because it will (luckily) trigger our
legacy SFDP parsing, so newer versions with SFDP support will still get
the parameters from the SFDP tables.

Reported-by: Hartmut Birr <e9hack@gmail.com>
Closes: https://lore.kernel.org/r/CALxbwRo_-9CaJmt7r7ELgu+vOcgk=xZcGHobnKf=oT2=u4d4aA@mail.gmail.com/
Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Michael Walle <mwalle@kernel.org>
---
As mentioned this is for fixing the regression and a proper fix will
make use of the TRY_SFDP (or whatever it will be named) mechanism.
---
 drivers/mtd/spi-nor/winbond.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index ca67bf2c46c3..6b6dec6f8faf 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -105,7 +105,9 @@ static const struct flash_info winbond_nor_parts[] = {
 	}, {
 		.id = SNOR_ID(0xef, 0x40, 0x18),
 		.name = "w25q128",
+		.size = SZ_16M,
 		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
 	}, {
 		.id = SNOR_ID(0xef, 0x40, 0x19),
 		.name = "w25q256",
-- 
2.39.2

Re: [PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

[Tudor Ambarus]

On 6/21/24 1:09 PM, Michael Walle wrote:
> Commit 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> removed the flags for non-SFDP devices. It was assumed that it wasn't in
> use anymore. This wasn't true. Add the no_sfdp_flags as well as the size
> again.
> 
> We add the additional flags for dual and quad read because they have
> been reported to work properly by Hartmut using both older and newer
> versions of this flash, the similar flashes with 64Mbit and 256Mbit
> already have these flags and because it will (luckily) trigger our
> legacy SFDP parsing, so newer versions with SFDP support will still get
> the parameters from the SFDP tables.
> 
> Reported-by: Hartmut Birr <e9hack@gmail.com>
> Closes: https://lore.kernel.org/r/CALxbwRo_-9CaJmt7r7ELgu+vOcgk=xZcGHobnKf=oT2=u4d4aA@mail.gmail.com/
> Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Michael Walle <mwalle@kernel.org>

Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>

> ---
> As mentioned this is for fixing the regression and a proper fix will
> make use of the TRY_SFDP (or whatever it will be named) mechanism.
> ---
>  drivers/mtd/spi-nor/winbond.c | 2 ++
>  1 file changed, 2 insertions(+)

Re: [PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

[Esben Haabendal]

Michael Walle <mwalle@kernel.org> writes:

> Commit 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> removed the flags for non-SFDP devices. It was assumed that it wasn't in
> use anymore. This wasn't true. Add the no_sfdp_flags as well as the size
> again.
>
> We add the additional flags for dual and quad read because they have
> been reported to work properly by Hartmut using both older and newer
> versions of this flash, the similar flashes with 64Mbit and 256Mbit
> already have these flags and because it will (luckily) trigger our
> legacy SFDP parsing, so newer versions with SFDP support will still get
> the parameters from the SFDP tables.
>
> Reported-by: Hartmut Birr <e9hack@gmail.com>
> Closes: https://lore.kernel.org/r/CALxbwRo_-9CaJmt7r7ELgu+vOcgk=xZcGHobnKf=oT2=u4d4aA@mail.gmail.com/
> Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Michael Walle <mwalle@kernel.org>

Reviewed-by: Esben Haabendal <esben@geanix.com>

> ---
> As mentioned this is for fixing the regression and a proper fix will
> make use of the TRY_SFDP (or whatever it will be named) mechanism.
> ---
>  drivers/mtd/spi-nor/winbond.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
> index ca67bf2c46c3..6b6dec6f8faf 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -105,7 +105,9 @@ static const struct flash_info winbond_nor_parts[] = {
>  	}, {
>  		.id = SNOR_ID(0xef, 0x40, 0x18),
>  		.name = "w25q128",
> +		.size = SZ_16M,
>  		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
> +		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
>  	}, {
>  		.id = SNOR_ID(0xef, 0x40, 0x19),
>  		.name = "w25q256",

Re: [PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

[Pratyush Yadav]

On Fri, Jun 21 2024, Michael Walle wrote:

> Commit 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> removed the flags for non-SFDP devices. It was assumed that it wasn't in
> use anymore. This wasn't true. Add the no_sfdp_flags as well as the size
> again.
>
> We add the additional flags for dual and quad read because they have
> been reported to work properly by Hartmut using both older and newer
> versions of this flash, the similar flashes with 64Mbit and 256Mbit
> already have these flags and because it will (luckily) trigger our
> legacy SFDP parsing, so newer versions with SFDP support will still get
> the parameters from the SFDP tables.
>
> Reported-by: Hartmut Birr <e9hack@gmail.com>
> Closes: https://lore.kernel.org/r/CALxbwRo_-9CaJmt7r7ELgu+vOcgk=xZcGHobnKf=oT2=u4d4aA@mail.gmail.com/
> Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Michael Walle <mwalle@kernel.org>

Reviewed-by: Pratyush Yadav <pratyush@kernel.org>

Applied to spi-nor/next. Thanks!

-- 
Regards,
Pratyush Yadav