linux-kernel - Re: [PATCH] mtd: spi-nor: issi: add support for IS25WP01G

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Message-ID: <9ba43cf93ede8ba7934a4461f2f7a640@walle.cc>
Date:   Tue, 18 Apr 2023 10:54:47 +0200
From:   Michael Walle <michael@...le.cc>
To:     niravkumar.l.rabara@...el.com
Cc:     tudor.ambarus@...aro.org, pratyush@...nel.org,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: issi: add support for IS25WP01G

Hi,

> From: Niravkumar L Rabara <niravkumar.l.rabara@...el.com>
> 
> Tested on Intel N5X socdk board,
> random data write, erase, read - verified erase operations
> random data write, read and compare - verified write/read operations
> 
> Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@...el.com>
> 
> ---
> root@n5x:~# cat /sys/devices/platform/soc/ff8d2000.spi/spi_master/
> spi0/spi0.0/spi-nor/jedec_id
> 9d701b
> root@n5x:~# cat /sys/devices/platform/soc/ff8d2000.spi/spi_master/
> spi0/spi0.0/spi-nor/manufacturer
> issi
> root@n5x:~# cat /sys/devices/platform/soc/ff8d2000.spi/spi_master/
> spi0/spi0.0/spi-nor/partname
> is25wp01g
> root@n5x:~# hexdump /sys/devices/platform/soc/ff8d2000.spi/spi_master
> /spi0/spi0.0/spi-nor/sfdp
> 0000000 4653 5044 0106 ff01 0600 1001 0030 ff00
> 0000010 0084 0201 0080 ff00 ffff ffff ffff ffff
> 0000020 ffff ffff ffff ffff ffff ffff ffff ffff
> 0000030 20e5 fffb ffff 3fff eb44 6b08 3b08 bb80
> 0000040 fffe ffff ffff ff00 ffff eb44 200c 520f
> 0000050 d810 ff00 4262 00a9 6482 d302 8dec 4c69
> 0000060 757a 757a a4f7 5cd5 c24a ff2c 30e1 a9fa
> 0000070 ffff ffff ffff ffff ffff ffff ffff ffff
> 0000080 eeff ffff 5c21 ffdc
> 0000088
> root@n5x:~# md5sum /sys/devices/platform/soc/ff8d2000.spi/spi_master/
> spi0/spi0.0/spi-nor/sfdp
> 83440c0ff8676fe5292d207788693900  /sys/devices/platform/soc/ff8d2000.
> spi/spi_master/spi0/spi0.0/spi-nor/sfdp

Thanks for the dump!

> ---
>  drivers/mtd/spi-nor/issi.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
> index 400e2b42f45a..79132267cf0d 100644
> --- a/drivers/mtd/spi-nor/issi.c
> +++ b/drivers/mtd/spi-nor/issi.c
> @@ -64,6 +64,8 @@ static const struct flash_info issi_nor_parts[] = {
>  		PARSE_SFDP
>  		FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
>  		.fixups = &is25lp256_fixups },
> +	{ "is25wp01g",  INFO(0x9d701b, 0, 256 * 1024,  512)
> +		PARSE_SFDP },

There are no special flags, thus this flash should just work with the
generic SPI-NOR driver [1]. No patch needed.

-michael

>  	{ "is25wp032",  INFO(0x9d7016, 0, 64 * 1024,  64)
>  		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
>  	{ "is25wp064",  INFO(0x9d7017, 0, 64 * 1024, 128)

[1] 
https://elixir.bootlin.com/linux/v6.3-rc7/source/drivers/mtd/spi-nor/core.c#L1637