linux-kernel - Re: [PATCH v2] mtd: nand: spi: rework detect procedure for different read id op

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Message-ID: <20200110090422.75988c49@collabora.com>
Date:   Fri, 10 Jan 2020 09:04:22 +0100
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Chuanhong Guo <gch981213@...il.com>
Cc:     linux-mtd@...ts.infradead.org,
        Boris Brezillon <bbrezillon@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] mtd: nand: spi: rework detect procedure for
 different read id op

On Fri, 10 Jan 2020 15:34:28 +0800
Chuanhong Guo <gch981213@...il.com> wrote:

> Hi!
> 
> On Fri, Jan 10, 2020 at 2:59 PM Boris Brezillon
> <boris.brezillon@...labora.com> wrote:
> > [...]  
> > > +     ret = spinand_read_id_op(spinand, 1, 0, id);
> > > +     if (ret)
> > > +             return ret;
> > > +     ret = spinand_manufacturer_match(spinand,
> > > +                                      SPINAND_READID_METHOD_OPCODE_ADDR);
> > > +     if (!ret)
> > > +             return 0;
> > > +
> > > +     ret = spinand_read_id_op(spinand, 0, 1, id);  
> >
> > Hm, we should probably do only one of each read_id and iterate over all
> > manufacturers/chips each time instead of doing 3 read_ids per
> > manufacturer.  
> 
> This actually do the former instead of the latter. Maybe the function
> names are a bit
> misleading. spinand_manufacturer_match iterates over all manufacturers
> in one call,
> and spinand_manufacturer_detect is called once in spinand_detect.
> Do you have suggestions on function naming?

Maybe you can just inline the content of this function in
spinand_detect().