linux-kernel - Re: [PATCH] mtd: spi-nor: Add support for Spansion S25FL064L

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Message-ID: <10af97e9-345f-ebc6-1dd9-7d556a366cfa@microchip.com>
Date:   Thu, 22 Jun 2017 15:28:26 +0200
From:   Cyrille Pitchen <cyrille.pitchen@...rochip.com>
To:     Harry Chou <harryyc.chou@...il.com>, <cyrille.pitchen@...ev4u.fr>
CC:     <boris.brezillon@...e-electrons.com>, <richard@....at>,
        <linux-kernel@...r.kernel.org>, <marek.vasut@...il.com>,
        <linux-mtd@...ts.infradead.org>, <computersforpeace@...il.com>,
        <dwmw2@...radead.org>
Subject: Re: [PATCH] mtd: spi-nor: Add support for Spansion S25FL064L

Hi Harry,

Le 22/06/2017 à 14:53, Harry Chou a écrit :
> It's an 8 MiB flash with 4 KiB erase sectors.
> 
> Signed-off-by: Harry Chou <HarryYC.Chou@...il.com>
> ---
>  drivers/mtd/spi-nor/spi-nor.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index dea8c9c..1f84765 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -1076,6 +1076,7 @@ static const struct flash_info spi_nor_ids[] = {
>  	{ "s25fl164k",  INFO(0x014017,      0,  64 * 1024, 128, SECT_4K) },
>  	{ "s25fl204k",  INFO(0x014013,      0,  64 * 1024,   8, SECT_4K | SPI_NOR_DUAL_READ) },
>  	{ "s25fl208k",  INFO(0x014014,      0,  64 * 1024,  16, SECT_4K | SPI_NOR_DUAL_READ) },
> +	{ "s25fl064l",  INFO(0x016017,      0,  64 * 1024, 128, SECT_4K) },
>

According to the Cypress datasheet, this memory part number supports
Fast Read:
- Dual Output (SPI 1-1-2)
- Dual I/O (SPI 1-2-2)
- Quad Output (SPI 1-1-4)
- Quad I/O (SPI 1-4-4)

http://www.cypress.com/file/316661/download


So you should also add the 2 flags SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ
in addition to SECT_4K and also the flag SPI_NOR_4B_OPCODES since
this part number also supports the 4-byte address instruction set.

Best regards,

Cyrille


>  	/* SST -- large erase sizes are "overlays", "sectors" are 4K */
>  	{ "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024,  8, SECT_4K | SST_WRITE) },
>