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

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Date:   Fri, 10 Jan 2020 09:10:24 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Boris Brezillon <boris.brezillon@...labora.com>
Cc:     Chuanhong Guo <gch981213@...il.com>, linux-mtd@...ts.infradead.org,
        Boris Brezillon <bbrezillon@...nel.org>,
        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

Hi Boris,

Boris Brezillon <boris.brezillon@...labora.com> wrote on Fri, 10 Jan
2020 09:04:22 +0100:

> 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().

Actually I found that part clear enough, I would keep it as is, out of
the spinand_detect() function as long as there is no actual reason to
merge them?