linux-kernel - Re: [PATCH] mtd: spi-nor: winbond: Add support for w25q512jv

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Date:   Mon, 4 Jan 2021 08:58:26 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <shuhao.mai.1990@...il.com>, <miquel.raynal@...tlin.com>,
        <richard@....at>, <vigneshr@...com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: spi-nor: winbond: Add support for w25q512jv

Hi, Shuhao,

On 11/11/20 3:45 AM, Shuhao Mai wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Add support for w25q512jv. This is of the same series chip with
> w25q256jv, which is already supported, but with size doubled and
> different JEDEC ID.

Where and how was this tested? Please add this info in the commit
message.

> 
> Signed-off-by: Shuhao Mai <shuhao.mai.1990@...il.com>
> ---
>  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 e5dfa786f190..beaa6389e2dc 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -97,6 +97,8 @@ static const struct flash_info winbond_parts[] = {
>                              SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
>         { "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024,
>                             SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
> +       { "w25q512jv", INFO(0xef4020, 0, 64 * 1024, 1024,

We should name it "w25q512jvq" in order to differentiate it to the
"M" version: https://www.winbond.com/resource-files/W25Q512JV%20DTR%20RevD%2006292020%20133.pdf

The flash supports BP locking and we can enable it if you can test 
the locking with mtd-utils. Not mandatory though.

Cheers,
ta
> +                           SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
>  };
> 
>  /**
> --
> 2.20.1
>