Add support for the IS25WX01G 128MB (1Gb) ISSI Serial Flash Memory.

Signed-off-by: Flaviu Nistor <flaviu.nistor@gmail.com>
---
 drivers/mtd/spi-nor/issi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
index 18d9a00aa22e..e4997f9bd557 100644
--- a/drivers/mtd/spi-nor/issi.c
+++ b/drivers/mtd/spi-nor/issi.c
@@ -126,6 +126,9 @@ static const struct flash_info issi_nor_parts[] = {
 		.flags = SPI_NOR_QUAD_PP,
 		.fixups = &is25lp256_fixups,
 		.fixup_flags = SPI_NOR_4B_OPCODES,
+	}, {
+		/* IS25WX01G */
+		.id = SNOR_ID(0x9d, 0x5b, 0x1b),
 	}
 };
 
-- 
2.43.0

Hi Flaviu,

On Mon, Sep 01 2025, Flaviu Nistor wrote:

> Add support for the IS25WX01G 128MB (1Gb) ISSI Serial Flash Memory.
>
> Signed-off-by: Flaviu Nistor <flaviu.nistor@gmail.com>
> ---
>  drivers/mtd/spi-nor/issi.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
> index 18d9a00aa22e..e4997f9bd557 100644
> --- a/drivers/mtd/spi-nor/issi.c
> +++ b/drivers/mtd/spi-nor/issi.c
> @@ -126,6 +126,9 @@ static const struct flash_info issi_nor_parts[] = {
>  		.flags = SPI_NOR_QUAD_PP,
>  		.fixups = &is25lp256_fixups,
>  		.fixup_flags = SPI_NOR_4B_OPCODES,
> +	}, {
> +		/* IS25WX01G */
> +		.id = SNOR_ID(0x9d, 0x5b, 0x1b),

It seems the flash needs no special configuration. IIUC it can be driven
entirely based on SFDP data. In that case, I don't think there is a need
for an entry at all. The generic SFDP-based driver should already be
enough for your flash. Just add a "jedec,spi-nor" node to your DT and it
should work.

>  	}
>  };

-- 
Regards,
Pratyush Yadav

> Hi Flaviu,
>
> On Mon, Sep 01 2025, Flaviu Nistor wrote:
>
>> Add support for the IS25WX01G 128MB (1Gb) ISSI Serial Flash Memory.
>>
>> Signed-off-by: Flaviu Nistor <flaviu.nistor@gmail.com>
>> ---
>>  drivers/mtd/spi-nor/issi.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
>> index 18d9a00aa22e..e4997f9bd557 100644
>> --- a/drivers/mtd/spi-nor/issi.c
>> +++ b/drivers/mtd/spi-nor/issi.c
>> @@ -126,6 +126,9 @@ static const struct flash_info issi_nor_parts[] = {
>>  		.flags = SPI_NOR_QUAD_PP,
>>  		.fixups = &is25lp256_fixups,
>>  		.fixup_flags = SPI_NOR_4B_OPCODES,
>> +	}, {
>> +		/* IS25WX01G */
>> +		.id = SNOR_ID(0x9d, 0x5b, 0x1b),
>
> It seems the flash needs no special configuration. IIUC it can be driven
> entirely based on SFDP data. In that case, I don't think there is a need
> for an entry at all. The generic SFDP-based driver should already be
> enough for your flash. Just add a "jedec,spi-nor" node to your DT and it
> should work.

Thanks for the review and the explanation. I now see in
the core driver that spi_nor_check_sfdp_signature() is
used if spi_nor_match_id() does not find a valid entry.

>
>>  	}
>>  };