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Message-ID: <20180726084935.047f33c7@xps13>
Date: Thu, 26 Jul 2018 08:49:35 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: xiaolei li <xiaolei.li@...iatek.com>
Cc: Boris Brezillon <boris.brezillon@...tlin.com>,
Wenyou Yang <wenyou.yang@...rochip.com>,
Josh Wu <rainyfeeling@...look.com>,
"Tudor Ambarus" <Tudor.Ambarus@...rochip.com>,
Richard Weinberger <richard@....at>,
David Woodhouse <dwmw2@...radead.org>,
Brian Norris <computersforpeace@...il.com>,
Marek Vasut <marek.vasut@...il.com>,
"Nicolas Ferre" <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Kamal Dasu <kdasu.kdev@...il.com>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
Han Xu <han.xu@....com>,
Harvey Hunt <harveyhuntnexus@...il.com>,
Vladimir Zapolskiy <vz@...ia.com>,
Sylvain Lemieux <slemieux.tyco@...il.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Chen-Yu Tsai <wens@...e.org>,
Marc Gonzalez <marc.w.gonzalez@...e.fr>,
"Mans Rullgard" <mans@...sr.com>, Stefan Agner <stefan@...er.ch>,
<linux-mtd@...ts.infradead.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
<bcm-kernel-feedback-list@...adcom.com>,
<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v4 14/35] mtd: rawnand: mtk: convert driver to
nand_scan()
Hi xiaolei,
xiaolei li <xiaolei.li@...iatek.com> wrote on Thu, 26 Jul 2018 14:46:29
+0800:
> On Thu, 2018-07-26 at 08:14 +0200, Boris Brezillon wrote:
> > On Thu, 26 Jul 2018 14:06:41 +0800
> > xiaolei li <xiaolei.li@...iatek.com> wrote:
> >
> > > On Sat, 2018-07-21 at 19:10 +0200, Boris Brezillon wrote:
> > > > On Fri, 20 Jul 2018 17:15:06 +0200
> > > > Miquel Raynal <miquel.raynal@...tlin.com> wrote:
> > > >
> > > > > Two helpers have been added to the core to make ECC-related
> > > > > configuration between the detection phase and the final NAND scan. Use
> > > > > these hooks and convert the driver to just use nand_scan() instead of
> > > > > both nand_scan_ident() and nand_scan_tail().
> > > > >
> > > > > Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> > > > > ---
> > > > > drivers/mtd/nand/raw/mtk_nand.c | 75 ++++++++++++++++++++++++-----------------
> > > > > 1 file changed, 44 insertions(+), 31 deletions(-)
> > > > >
> > > > > diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c
> > > > > index 7bc6be3f6ec0..967418f945ea 100644
> > > > > --- a/drivers/mtd/nand/raw/mtk_nand.c
> > > > > +++ b/drivers/mtd/nand/raw/mtk_nand.c
> > > > > @@ -1250,13 +1250,54 @@ static int mtk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd)
> > > > > return 0;
> > > > > }
> > > > >
> > > > > +static int mtk_nfc_attach_chip(struct nand_chip *chip)
> > > > > +{
> > > > > + struct mtd_info *mtd = nand_to_mtd(chip);
> > > > > + struct device *dev = mtd->dev.parent;
> > > > > + struct mtk_nfc *nfc = nand_get_controller_data(chip);
> > > > > + struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip);
> > > > > + int len;
> > > > > + int ret;
> > > > > +
> > > > > + if (chip->options & NAND_BUSWIDTH_16) {
> > > > > + dev_err(dev, "16bits buswidth not supported");
> > > > > + return -EINVAL;
> > > > > + }
> > > > > +
> > > > > + /* store bbt magic in page, cause OOB is not protected */
> > > > > + if (chip->bbt_options & NAND_BBT_USE_FLASH)
> > > > > + chip->bbt_options |= NAND_BBT_NO_OOB;
> > > > > +
> > > > > + ret = mtk_nfc_ecc_init(dev, mtd);
> > > > > + if (ret)
> > > > > + return ret;
> > > > > +
> > > > > + ret = mtk_nfc_set_spare_per_sector(&mtk_nand->spare_per_sector, mtd);
> > > > > + if (ret)
> > > > > + return ret;
> > > > > +
> > > > > + mtk_nfc_set_fdm(&mtk_nand->fdm, mtd);
> > > > > + mtk_nfc_set_bad_mark_ctl(&mtk_nand->bad_mark, mtd);
> > > > > +
> > > > > + len = mtd->writesize + mtd->oobsize;
> > > > > + nfc->buffer = devm_kzalloc(dev, len, GFP_KERNEL);
> > > > > + if (!nfc->buffer)
> > > > > + return -ENOMEM;
> > > > > +
> > > > > + return 0;
> > > > > +}
> > > > > +
> > > > > +static const struct nand_controller_ops mtk_nfc_controller_ops = {
> > > > > + .attach_chip = mtk_nfc_attach_chip,
> > > > > +};
> > > > > +
> > > > > static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc,
> > > > > struct device_node *np)
> > > > > {
> > > > > struct mtk_nfc_nand_chip *chip;
> > > > > struct nand_chip *nand;
> > > > > struct mtd_info *mtd;
> > > > > - int nsels, len;
> > > > > + int nsels;
> > > > > u32 tmp;
> > > > > int ret;
> > > > > int i;
> > > > > @@ -1287,6 +1328,7 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc,
> > > > >
> > > > > nand = &chip->nand;
> > > > > nand->controller = &nfc->controller;
> > > > > + nand->controller->ops = &mtk_nfc_controller_ops;
> > > >
> > > > Just like for the marvell driver, this assignment should be moved here
> > > > [1].
> > > Agree to this.
> > >
> >
> > > > Also, it looks like this driver is open-coding
> > > > nand_controller_init(), probably something we should fix (in a separate
> > > > patch).
> > > May I ask if you mean driver should use nand_hw_control_init helper to
> > > do controller_init?
> >
> > Well, now it's named nand_controller_init(), but yes, that's what I
> > meant.
>
> OK. I will fix it base on this patch series later.
Nice!
Then you can just wait for the next -rc1, this series should be
available.
Thanks,
Miquèl
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