linux-kernel - Re: [PATCH V2 2/3] mtd: spi-nor: add support for macronix mx25u3235f

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Date:   Wed, 21 Dec 2016 11:27:02 +0100
From:   Cyrille Pitchen <cyrille.pitchen@...el.com>
To:     John Crispin <john@...ozen.org>,
        Marek Vasut <marek.vasut@...il.com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        André Valentin <avalentin@...cant.net>
Subject: Re: [PATCH V2 2/3] mtd: spi-nor: add support for macronix mx25u3235f

Hi all,

Le 21/12/2016 à 08:23, John Crispin a écrit :
> From: André Valentin <avalentin@...cant.net>
> 
> This patch adds support for a new macronix spi flash chip. We have had this
> patch inside our tree for a while and people are actively using routers
> with this chip.
> 
> Signed-off-by: John Crispin <john@...ozen.org>
> Signed-off-by: André Valentin <avalentin@...cant.net>
> ---
> Changes in V2
> * add description
> * add SECT_4K
> * fix indenting
> 
>  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 171adb3..bfff159 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -868,6 +868,7 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
>  	{ "mx25l3205d",  INFO(0xc22016, 0, 64 * 1024,  64, SECT_4K) },
>  	{ "mx25l3255e",  INFO(0xc29e16, 0, 64 * 1024,  64, SECT_4K) },
>  	{ "mx25l6405d",  INFO(0xc22017, 0, 64 * 1024, 128, SECT_4K) },
> +	{ "mx25u3235f",	 INFO(0xc22536, 0, 64 * 1024,  64, SECT_4K) },

According to its datasheet, the Macronix MX25U3235F also supports Fast Read
1-1-2 (3Bh) and Fast Read 1-1-4 (EBh) hence the SPI_NOR_DUAL_READ
and SPI_NOR_QUAD_READ flags should be set as well.

Best regards,

Cyrille

>  	{ "mx25u6435f",  INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
>  	{ "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
>  	{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
>