linux-kernel - Re: [PATCH v2 1/1] drivers: mtd: spi-nor: update read capabilities for w25q64 and s25fl064k

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Date:   Tue, 7 Jul 2020 11:33:50 +0530
From:   Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
To:     Tudor Ambarus <Tudor.Ambarus@...rochip.com>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] drivers: mtd: spi-nor: update read capabilities
 for w25q64 and s25fl064k

On Wed, Jul 1, 2020 at 12:21 PM <Tudor.Ambarus@...rochip.com> wrote:
>
> On 5/29/20 10:16 AM, Rayagonda Kokatanur wrote:
> > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> >
> > Both w25q64 and s25fl064k nor flash support QUAD and DUAL read
> > command, hence update the same in flash_info table.
> >
> > This is tested on Broadcom Stingray SoC (bcm958742t).
> >
> > Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@...adcom.com>
> > ---
> > Changes from v1:
> >  -Address review comments from Vignesh Raghavendra
> >   Update commit message with testing details.
> >
> >  drivers/mtd/spi-nor/spansion.c | 3 ++-
> >  drivers/mtd/spi-nor/winbond.c  | 3 ++-
> >  2 files changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
> > index 6756202ace4b..c91bbb8d9cd6 100644
> > --- a/drivers/mtd/spi-nor/spansion.c
> > +++ b/drivers/mtd/spi-nor/spansion.c
> > @@ -52,7 +52,8 @@ static const struct flash_info spansion_parts[] = {
> >                              SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> >         { "s25fl016k",  INFO(0xef4015,      0,  64 * 1024,  32,
> >                              SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> > -       { "s25fl064k",  INFO(0xef4017,      0,  64 * 1024, 128, SECT_4K) },
> > +       { "s25fl064k",  INFO(0xef4017,      0,  64 * 1024, 128,
> > +                            SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> >         { "s25fl116k",  INFO(0x014015,      0,  64 * 1024,  32,
> >                              SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> >         { "s25fl132k",  INFO(0x014016,      0,  64 * 1024,  64, SECT_4K) },
> > diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
> > index 17deabad57e1..2028cab3eff9 100644
> > --- a/drivers/mtd/spi-nor/winbond.c
> > +++ b/drivers/mtd/spi-nor/winbond.c
> > @@ -39,7 +39,8 @@ static const struct flash_info winbond_parts[] = {
> >                             SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
> >                             SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) },
> >         { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
> > -       { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
> > +       { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128,
> > +                        SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
>
> I checked the winbond website and from all the w25q64 flashes, W25Q64JV-IQ/JQ
> and W25Q64FV share the 0xef4017 flash ID. Both support 0x3b and 0x6b commands,
> which is fine.
>
> I see that s25fl064k and w25q64 share the same flash ID. The search alg will
> return the first hit, so s25fl064k even for the winbond parts. What is the
> difference between s25fl064k and W25Q64JVQ/W25Q64FV?

I think both are from different vendor.
Please refer link for more info -
https://lore.kernel.org/patchwork/patch/628090/

Best regards,
Rayagonda

>
> Cheers,
> ta