linux-kernel - Re: [PATCH v2] mtd: spi-nor: macronix: add support for mx77l51250f

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Message-ID: <5076cc829fb5a9c5959687a401b120ca@walle.cc>
Date:   Mon, 09 Jan 2023 09:49:00 +0100
From:   Michael Walle <michael@...le.cc>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        linux-mtd@...ts.infradead.org,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org,
        Alexander Usyskin <alexander.usyskin@...el.com>
Subject: Re: [PATCH v2] mtd: spi-nor: macronix: add support for mx77l51250f

Am 2023-01-07 22:43, schrieb Tomas Winkler:
> $ cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
> mx77l51250f
> $ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
> c2751a
> $ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
> macronix
> $ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
> 53464450060103ff00060110300000ffc2000104100100ff030001020001
> 00ff84000102c00000ffffffffffffffffffe520f3ffffffff1f44eb086b
> 083b04bbeeffffffffff00ffffff00ff0c200f5210d800ff8341bd0082a7
> 04db4403373830b030b0f7a9d55c009e29fff050f985ffffffffffffffff
> ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
> ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
> ffffffffffffffffffffffff7f0ff0ff215cdcffffffffffffffffffffff
> ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
> ffffffffffffffffffffffffffffffff3c9b96f0c5a4c2ffffffffffffff
> ffff003600279df9c064fecfffffffffffff
> 
> $ md5sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
> 36fb8e3e6f82c45bfabea45ec73c08a8
> /sys/bus/spi/devices/spi0.0/spi-nor/sfdp

Thanks for the dumps, as Dhruva mentioned this should go
in the comment section of this patch. But also see below.


> --- a/drivers/mtd/spi-nor/macronix.c
> +++ b/drivers/mtd/spi-nor/macronix.c
> @@ -100,6 +100,8 @@ static const struct flash_info macronix_nor_parts[] 
> = {
>  	{ "mx66u2g45g",	 INFO(0xc2253c, 0, 64 * 1024, 4096)
>  		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
>  		FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
> +	{ "mx77l51250f", INFO(0xc2751a, 0, 64 * 1024, 4096)
> +		PARSE_SFDP },

With the newest generic spi nor driver [1] this patch shouldn't
be needed at all anymore. Could you verify, that your flash will work
without it?

-michael

[1] 
https://elixir.bootlin.com/linux/v6.2-rc3/source/drivers/mtd/spi-nor/core.c#L1637