linux-kernel - Re: [RESEND PATCH v3 12/20] mtd: spi-nor: Add spansion_post_sfdp

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Message-ID: <8f10d895-f97e-934e-8dd4-be22839a7c77@ti.com>
Date:   Tue, 27 Aug 2019 12:40:02 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     <Tudor.Ambarus@...rochip.com>, <boris.brezillon@...labora.com>,
        <marek.vasut@...il.com>, <miquel.raynal@...tlin.com>,
        <richard@....at>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <boris.brezillon@...tlin.com>
Subject: Re: [RESEND PATCH v3 12/20] mtd: spi-nor: Add
 spansion_post_sfdp_fixups()



On 26/08/19 5:38 PM, Tudor.Ambarus@...rochip.com wrote:
> From: Boris Brezillon <boris.brezillon@...tlin.com>
> 
> Add a spansion_post_sfdp_fixups() function to fix the erase opcode,
> erase sector size and set the SNOR_F_4B_OPCODES flag.
> This way, all spansion related quirks are placed in the
> spansion_post_sfdp_fixups() function.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
> ---

Reviewed-by: Vignesh Raghavendra <vigneshr@...com>

Regards
Vignesh

> v3: no changes, rebase on previous commits
> 
>  drivers/mtd/spi-nor/spi-nor.c | 37 +++++++++++++++++++++++--------------
>  1 file changed, 23 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index b8caf5171ff5..c862a59ce9df 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -591,18 +591,6 @@ static u8 spi_nor_convert_3to4_erase(u8 opcode)
>  
>  static void spi_nor_set_4byte_opcodes(struct spi_nor *nor)
>  {
> -	/* Do some manufacturer fixups first */
> -	switch (JEDEC_MFR(nor->info)) {
> -	case SNOR_MFR_SPANSION:
> -		/* No small sector erase for 4-byte command set */
> -		nor->erase_opcode = SPINOR_OP_SE;
> -		nor->mtd.erasesize = nor->info->sector_size;
> -		break;
> -
> -	default:
> -		break;
> -	}
> -
>  	nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
>  	nor->program_opcode = spi_nor_convert_3to4_program(nor->program_opcode);
>  	nor->erase_opcode = spi_nor_convert_3to4_erase(nor->erase_opcode);
> @@ -4304,6 +4292,19 @@ static void spi_nor_info_init_params(struct spi_nor *nor)
>  	spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
>  }
>  
> +static void spansion_post_sfdp_fixups(struct spi_nor *nor)
> +{
> +	struct mtd_info *mtd = &nor->mtd;
> +
> +	if (mtd->size <= SZ_16M)
> +		return;
> +
> +	nor->flags |= SNOR_F_4B_OPCODES;
> +	/* No small sector erase for 4-byte command set */
> +	nor->erase_opcode = SPINOR_OP_SE;
> +	nor->mtd.erasesize = nor->info->sector_size;
> +}
> +
>  /**
>   * spi_nor_post_sfdp_fixups() - Updates the flash's parameters and settings
>   * after SFDP has been parsed (is also called for SPI NORs that do not
> @@ -4316,6 +4317,15 @@ static void spi_nor_info_init_params(struct spi_nor *nor)
>   */
>  static void spi_nor_post_sfdp_fixups(struct spi_nor *nor)
>  {
> +	switch (JEDEC_MFR(nor->info)) {
> +	case SNOR_MFR_SPANSION:
> +		spansion_post_sfdp_fixups(nor);
> +		break;
> +
> +	default:
> +		break;
> +	}
> +
>  	if (nor->info->fixups && nor->info->fixups->post_sfdp)
>  		nor->info->fixups->post_sfdp(nor);
>  }
> @@ -4862,8 +4872,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
>  		nor->addr_width = 3;
>  	}
>  
> -	if (info->flags & SPI_NOR_4B_OPCODES ||
> -	    (JEDEC_MFR(info) == SNOR_MFR_SPANSION && mtd->size > SZ_16M))
> +	if (info->flags & SPI_NOR_4B_OPCODES)
>  		nor->flags |= SNOR_F_4B_OPCODES;
>  
>  	if (nor->addr_width == 4 && nor->flags & SNOR_F_4B_OPCODES &&
> 

-- 
Regards
Vignesh