Re: [PATCH] mtd:spi-nor:Update Winbond SPI NOR Flash device ID

[MODEL WORK LST <lstfazz@gmail.com>]

Shame on me, I don't use the plain text to reply.
Please allow me send again.

Dear Michael sir:

Many thanks for your prompt response.
It is my first time update patch for Linux, please advise me if I do wrong.
We are testing these device by the NXP evaluation board.
But the running Linux revision for that board is still 4.x. To update
the latest ID,
should we prepare the system that can work with latest Linux revision?
For the test process, I was wondering to ask mount the device to UBIFS
is a good way for test?

For the ID, this time we add new ID that is not include in the flash_info[].
And we would keep our device who share the same ID have compatible
with each other.
Make sure the FW or SW only need to maintain an unique for each density.
If the same density device have different behavior, Winbond would apply new ID.
Or have application note for customer to aware the difference.

For the SFDP, I would check how to work and fill the information.

Thanks again for your reply and information share.

Sincerely

Steam Lin


Michael Walle <michael@walle.cc> 於 2021年7月7日 週三 下午7:31寫道：
>
> Hi,
>
> Am 2021-07-07 12:16, schrieb Steam Lin:
> > This patch is to update Winbond SPI NOR device
> > ID information.
> > Add new 3.3V and 1.8V device in the ID table.
> >
> > Signed-off-by: Steam Lin <Stlin2@winbond.com>
> > ---
> >  drivers/mtd/spi-nor/winbond.c | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> >
> > diff --git a/drivers/mtd/spi-nor/winbond.c
> > b/drivers/mtd/spi-nor/winbond.c
> > index 9a81c67a60c6..01aa49954793 100644
> > --- a/drivers/mtd/spi-nor/winbond.c
> > +++ b/drivers/mtd/spi-nor/winbond.c
> > @@ -102,6 +102,20 @@ static const struct flash_info winbond_parts[] = {
> >                           SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
> >       { "w25q512jvq", INFO(0xef4020, 0, 64 * 1024, 1024,
> >                            SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25h512jvm", INFO(0xef9020, 0, 64 * 1024, 1024,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25q01jvq", INFO(0xef4021, 0, 64 * 1024, 2048,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25q02jvq", INFO(0xef4022, 0, 64 * 1024, 4096,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25h01jvm", INFO(0xef9021, 0, 64 * 1024, 2048,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25h02jvm", INFO(0xef9022, 0, 64 * 1024, 4096,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25q512nwq", INFO(0xef6020, 0, 64 * 1024, 1024,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > +     { "w25q512nwm", INFO(0xef8020, 0, 64 * 1024, 1024,
> > +                          SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> >  };
>
> Nice to see patches from the vendor! Did you test these devices? We
> only accept new IDs which are actually tested. And are you aware of any
> ID collisions of these chips? Eg. sometimes the JWM reused the ID of the
> FW variant. How can we distinguish these?
>
> Also, you will have to supply SFDP data for all these chips, please have
> a look at [1] how to do that.
>
> [1]
> https://lore.kernel.org/linux-mtd/7038f037de3e224016d269324517400d@walle.cc/
>
>
> -michael