linux-kernel - Re: [PATCH v3] mtd: spi-nor: xmc: Add support for XM25LU64C The device is produced by Wuhan Xinxin Semiconductor Manufacturing Corp. (XMC) and found on some routers from Chinese manufactures.

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Message-ID: <97e61bf9-8539-414e-88fc-2d8b451057b1@linaro.org>
Date: Mon, 4 Nov 2024 06:57:57 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Ssunk <ssunkkan@...il.com>
Cc: pratyush@...nel.org, mwalle@...nel.org, miquel.raynal@...tlin.com,
 richard@....at, vigneshr@...com, linux-mtd@...ts.infradead.org,
 linux-kernel@...r.kernel.org, hhlee@...gle.com, roccochen@...gle.com
Subject: Re: [PATCH v3] mtd: spi-nor: xmc: Add support for XM25LU64C The
 device is produced by Wuhan Xinxin Semiconductor Manufacturing Corp. (XMC)
 and found on some routers from Chinese manufactures.

Hi,

On 11/3/24 2:21 PM, Ssunk wrote:
> The data sheet can be found here:
> https://www.xmcwh.com/uploads/954/XM25LU64C%20_%20Ver1.4.pdf

you probably won't need a flash entry at all because it seems that this
flash supports SFDP. The flash can be initialized solely based on its
SFDP tables. Have you tried probing the flash without this patch?

> 
> Signed-off-by: Kankan Sun <ssunkkan@...il.com>
> ---
> V1 -> V2: Removed redundant Signed-off-by information
> V2 -> V3: cc more maintainer
> 
>  drivers/mtd/spi-nor/xmc.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/xmc.c b/drivers/mtd/spi-nor/xmc.c
> index d5a06054b0dd..83e83c1c1266 100644
> --- a/drivers/mtd/spi-nor/xmc.c
> +++ b/drivers/mtd/spi-nor/xmc.c
> @@ -19,6 +19,11 @@ static const struct flash_info xmc_nor_parts[] = {
>  		.name = "XM25QH128A",
>  		.size = SZ_16M,
>  		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
> +	}, {
> +		.id = SNOR_ID(0x16, 0x41, 0x17),
> +		.name = "XM25LU64C",
> +		.size = SZ_8M,
> +		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
>  	},
>  };
>