linux-kernel - Re: [PATCH 1/2] mtd: spinand: Support serial NAND for reading two bytes ID

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Date: Wed, 3 Jul 2024 14:09:17 +0800
From: Cheng Ming Lin <linchengming884@...il.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: vigneshr@...com, richard@....at, linux-mtd@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, alvinzhou@...c.com.tw, leoyu@...c.com.tw, 
	Cheng Ming Lin <chengminglin@...c.com.tw>
Subject: Re: [PATCH 1/2] mtd: spinand: Support serial NAND for reading two
 bytes ID

Hi,

Miquel Raynal <miquel.raynal@...tlin.com> 於 2024年7月1日 週一 下午5:43寫道：
>
> Hi,
>
> linchengming884@...il.com wrote on Fri, 28 Jun 2024 16:54:43 +0800:
>
> > From: Cheng Ming Lin <chengminglin@...c.com.tw>
> >
> > Adding the Device ID 2 on Macronix Serial Flash.
> >
> > When the number of flashes increases, we need to utilize
> > Device ID 2 to distinguish between different flashes.
> >
> > These flashes have been validated on Xilinx zynq-picozed
> > board which included Macronix SPI Host.
> >
> > Signed-off-by: Cheng Ming Lin <chengminglin@...c.com.tw>
> > ---
>
> ...
>
> >       SPINAND_INFO("MX35UF1GE4AD",
> > -                  SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x96),
> > +                  SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x96, 0x03),
> >                    NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
> >                    NAND_ECCREQ(8, 512),
> >                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
> > @@ -289,7 +288,7 @@ static const struct spinand_info macronix_spinand_table[] = {
> >                    SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout,
> >                                    mx35lf1ge4ab_ecc_get_status)),
> >       SPINAND_INFO("MX35UF1GE4AC",
> > -                  SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x92),
> > +                  SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x92, 0x01),
> >                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
> >                    NAND_ECCREQ(4, 512),
> >                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
> > @@ -298,7 +297,6 @@ static const struct spinand_info macronix_spinand_table[] = {
> >                    SPINAND_HAS_QE_BIT,
> >                    SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout,
> >                                    mx35lf1ge4ab_ecc_get_status)),
> > -
>
> This is style, and if you care should be in another patch.

Okay, we currently have no plans to make this modification.

>
> >       SPINAND_INFO("MX31LF2GE4BC",
> >                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x2e),
> >                    NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
> > @@ -309,7 +307,7 @@ static const struct spinand_info macronix_spinand_table[] = {
> >                    SPINAND_HAS_QE_BIT,
> >                    SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout,
> >                                    mx35lf1ge4ab_ecc_get_status)),
> > -     SPINAND_INFO("MX3UF2GE4BC",
> > +     SPINAND_INFO("MX31UF2GE4BC",
>
> This is a fix that should have the right tags (stable/fixes) and be in
> another patch.
>
> Also, maybe you want this patch content to be backported. If it's the
> case, please add the necessary tags here as well.
>

Sure, we will separate this modification from this patch series.

> >                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae),
> >                    NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
> >                    NAND_ECCREQ(8, 512),
>
>
> Thanks,
> Miquèl

Thanks,
Chengming