[PATCH] mtd: spi-nor: issi: Add support for is25lp02g

[Boyapally, Srikanth]

Hi Michael,

> -----Original Message-----
> From: Michael Walle <michael at walle.cc>
> Sent: Tuesday, November 28, 2023 2:06 PM
> To: Boyapally, Srikanth <Srikanth.Boyapally at amd.com>
> Cc: Pratyush Yadav <pratyush at kernel.org>; tudor.ambarus at linaro.org;
> miquel.raynal at bootlin.com; richard at nod.at; vigneshr at ti.com; linux-
> mtd at lists.infradead.org; linux-kernel at vger.kernel.org; git (AMD-Xilinx)
> <git at amd.com>
> Subject: Re: [PATCH] mtd: spi-nor: issi: Add support for is25lp02g
> 
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> 
> 
> Hi,
> 
> >> > Add support for issi is25lp02g.
> >> >
> >> > Verified on AMD-Xilinx versal platform and executed mtd_debug
> >> > read/write test.
> >> >
> >> > Signed-off-by: Srikanth Boyapally <srikanth.boyapally at amd.com>
> >>
> >> Based on a datasheet [0] I found online, this flash seems to have
> >> SFDP.
> >> And since you do not add any flash specific fixups, it likely does
> >> not need an entry and would work fine with the generic flash driver.
> >> Did you try using that? See [1] for more info on contribution
> >> guidelines.
> >>
> >> [0] https://www.issi.com/WW/pdf/25LP-WP02GG.pdf
> >> [1] https://lore.kernel.org/linux-mtd/20231123160721.64561-2-
> >> tudor.ambarus at linaro.org/
> >>
> > I ran mtd_debug read/write tests on this flash, without adding flash
> > entry, it worked fine for me. Please ignore this patch.
> 
> Great! Could you please still dump and post your SFDP just for us to have more
> SFDP of diferent flashes? See [1].
>
SFDP dump:
versal-generic:/home/petalinux# hexdump -C /sys/bus/spi/devices/spi0.0/spi-nor/sfdp 
00000000  53 46 44 50 06 01 01 ff  00 06 01 10 30 00 00 ff  |SFDP........0...|
00000010  84 00 01 02 80 00 00 ff  ff ff ff ff ff ff ff ff  |................|
00000020  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
00000030  e5 20 fb ff ff ff ff 7f  44 eb 08 6b 08 3b 80 bb  |. ......D..k.;..|
00000040  fe ff ff ff ff ff 00 ff  ff ff 44 eb 0c 20 0f 52  |..........D.. .R|
00000050  10 d8 00 ff 62 42 a9 00  82 64 02 e2 ec 8d 69 4c  |....bB...d....iL|
00000060  7a 75 7a 75 f7 a2 d5 5c  4a c2 2c ff e8 30 fa a9  |zuzu...\J.,..0..|
00000070  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
00000080  ff ee ff ff 21 5c dc ff                           |....!\..|
00000088

regards,
Srikanth B
>
> -michael