[PATCH v3 5/5] mtd: spinand: winbond: add Winbond W25N04KV flash support

[Frieder Schrempf]

Am 06.06.25 um 09:21 schrieb Christian Marangi:
> Add Winbond W25N04KV flash support that use a different value to detect
> ECC bitflip.
> 
> Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>

For information: this will be covered by Mikhail's patchset here:

https://patchwork.ozlabs.org/project/uboot/cover/20250818100614.432931-1-mikhail.kshevetskiy@iopsys.eu/

And for the future, please provide a changelog when you send mulitple
versions of the same patch. Thanks!

> ---
>  drivers/mtd/nand/spi/winbond.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
> index dd4ed257a83..16abf89dbbf 100644
> --- a/drivers/mtd/nand/spi/winbond.c
> +++ b/drivers/mtd/nand/spi/winbond.c
> @@ -11,6 +11,7 @@
>  #include <linux/device.h>
>  #include <linux/kernel.h>
>  #endif
> +#include <linux/bitfield.h>
>  #include <linux/bug.h>
>  #include <linux/mtd/spinand.h>
>  
> @@ -18,6 +19,8 @@
>  
>  #define WINBOND_CFG_BUF_READ		BIT(3)
>  
> +#define W25N04KV_STATUS_ECC_5_8_BITFLIPS FIELD_PREP_CONST(STATUS_ECC_MASK, 0x3)
> +
>  static SPINAND_OP_VARIANTS(read_cache_variants,
>  		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
>  		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
> @@ -121,6 +124,7 @@ static int w25n02kv_ecc_get_status(struct spinand_device *spinand,
>  		return -EBADMSG;
>  
>  	case STATUS_ECC_HAS_BITFLIPS:
> +	case W25N04KV_STATUS_ECC_5_8_BITFLIPS:
>  		/*
>  		 * Let's try to retrieve the real maximum number of bitflips
>  		 * in order to avoid forcing the wear-leveling layer to move
> @@ -172,6 +176,15 @@ static const struct spinand_info winbond_spinand_table[] = {
>  					      &update_cache_variants),
>  		     0,
>  		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
> +	SPINAND_INFO("W25N04KV",
> +		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x23),
> +		     NAND_MEMORG(1, 2048, 128, 64, 4096, 40, 2, 1, 1),
> +		     NAND_ECCREQ(8, 512),
> +		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
> +					      &write_cache_variants,
> +					      &update_cache_variants),
> +		     0,
> +		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
>  };
>  
>  static int winbond_spinand_init(struct spinand_device *spinand)