From: "Stefan Riedmüller" <S.Riedmueller@phytec.de>
To: "han.xu@nxp.com" <han.xu@nxp.com>
Cc: "miquel.raynal@bootlin.com" <miquel.raynal@bootlin.com>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"michael@amarulasolutions.com" <michael@amarulasolutions.com>,
"ceggers@arri.de" <ceggers@arri.de>,
"bbrezillon@kernel.org" <bbrezillon@kernel.org>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"gerg@kernel.org" <gerg@kernel.org>,
Christian Hemp <C.Hemp@phytec.de>
Subject: Re: [RFC PATCH 2/2] gpmi-nand: Add ERR007117 protection for nfc_apply_timings
Date: Fri, 22 Oct 2021 08:45:52 +0000 [thread overview]
Message-ID: <92d463460324d4501523f8a1da1f07c12fd6490f.camel@phytec.de> (raw)
In-Reply-To: <20211013050148.2w373kpbfaeuxbwm@umbrella>
Hi Han,
sorry it took me some time to get back to you.
On Wed, 2021-10-13 at 00:01 -0500, Han Xu wrote:
> On 21/10/12 11:02AM, Stefan Riedmueller wrote:
> > According to i.MX 6 erratum ERR007117 gpmi clocks need to be gated off
> > when doing a gpmi_io clk rate change. So gate the clocks off before
> > the rate change in nfc_apply_timings and ungate them again after the
> > change.
> >
> > Otherwise this rate change can lead to an unresponsive GPMI core which
> > results in DMA timeouts and failed driver probe:
> >
> > [ 4.072318] gpmi-nand 112000.gpmi-nand: DMA timeout, last DMA
> > ...
> > [ 4.370355] gpmi-nand 112000.gpmi-nand: Chip: 0, Error -110
> > ...
> > [ 4.375988] gpmi-nand 112000.gpmi-nand: Chip: 0, Error -22
> > [ 4.381524] gpmi-nand 112000.gpmi-nand: Error in ECC-based read: -22
> > [ 4.387988] gpmi-nand 112000.gpmi-nand: Chip: 0, Error -22
> > [ 4.393535] gpmi-nand 112000.gpmi-nand: Chip: 0, Error -22
> > ...
> >
> > Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
> > ---
> > Hi,
> >
> > I'm not sure about the error handling here, if it is actually neccessary.
> > So some feedback would be nice here.
> >
> > Thanks,
> > Stefan
> > ---
> > drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 21 +++++++++++++++++++--
> > 1 file changed, 19 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> > b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> > index a1f7000f033e..326c8a895f1f 100644
> > --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> > +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> > @@ -713,15 +713,28 @@ static void gpmi_nfc_compute_timings(struct
> > gpmi_nand_data *this,
> > (use_half_period ? BM_GPMI_CTRL1_HALF_PERIOD :
> > 0);
> > }
> >
> > -static void gpmi_nfc_apply_timings(struct gpmi_nand_data *this)
> > +static int gpmi_nfc_apply_timings(struct gpmi_nand_data *this)
> > {
> > struct gpmi_nfc_hardware_timing *hw = &this->hw;
> > struct resources *r = &this->resources;
> > void __iomem *gpmi_regs = r->gpmi_regs;
> > unsigned int dll_wait_time_us;
> > + int ret;
> > +
> > + if (GPMI_IS_MX6Q(this)) {
>
> Not only for 6Q but for GPMI_IS_MX6
Can you confirm that i.MX 6SX and i.MX 7 are affected by the ERR007117 erratum
as well? Because the i.MX 6UL/ULL are included by the GPMI_IS_MX6Q already.
Or do we need another macro for i.MX 6UL/ULL as Christian has suggested
earlier?
Thanks,
Stefan
>
> > + ret = __gpmi_enable_clk(this, false);
> > + if (ret)
> > + return ret;
> > + }
> >
> > clk_set_rate(r->clock[0], hw->clk_rate);
> >
> > + if (GPMI_IS_MX6Q(this)) {
> > + ret = __gpmi_enable_clk(this, true);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > writel(hw->timing0, gpmi_regs + HW_GPMI_TIMING0);
> > writel(hw->timing1, gpmi_regs + HW_GPMI_TIMING1);
> >
> > @@ -739,6 +752,8 @@ static void gpmi_nfc_apply_timings(struct
> > gpmi_nand_data *this)
> >
> > /* Wait for the DLL to settle. */
> > udelay(dll_wait_time_us);
> > +
> > + return 0;
> > }
> >
> > static int gpmi_setup_interface(struct nand_chip *chip, int chipnr,
> > @@ -2271,7 +2286,9 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
> > */
> > if (this->hw.must_apply_timings) {
> > this->hw.must_apply_timings = false;
> > - gpmi_nfc_apply_timings(this);
> > + ret = gpmi_nfc_apply_timings(this);
> > + if (ret)
> > + return ret;
> > }
> >
> > dev_dbg(this->dev, "%s: %d instructions\n", __func__, op->ninstrs);
> > --
> > 2.25.1
> >
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next prev parent reply other threads:[~2021-10-22 8:46 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 6:41 GPMI iMX6ull timeout on DMA Greg Ungerer
2019-07-29 8:36 ` Miquel Raynal
2019-07-29 8:42 ` Michael Nazzareno Trimarchi
2019-07-29 12:18 ` Greg Ungerer
2019-07-29 12:20 ` Michael Nazzareno Trimarchi
2019-07-29 12:33 ` Greg Ungerer
2019-07-29 12:47 ` Miquel Raynal
2019-07-29 12:49 ` Michael Nazzareno Trimarchi
2019-07-29 12:55 ` Miquel Raynal
2019-07-29 13:00 ` Michael Nazzareno Trimarchi
2019-07-29 13:22 ` Miquel Raynal
2019-07-29 20:00 ` Michael Nazzareno Trimarchi
2019-07-29 21:02 ` Miquel Raynal
2019-07-30 0:28 ` Greg Ungerer
2019-07-30 0:41 ` Greg Ungerer
2019-07-30 6:06 ` Greg Ungerer
2019-07-30 8:38 ` Miquel Raynal
2019-07-30 8:58 ` Boris Brezillon
2019-07-31 2:05 ` Greg Ungerer
2019-07-31 6:28 ` Boris Brezillon
2019-08-02 7:19 ` Greg Ungerer
2019-08-02 12:34 ` Greg Ungerer
2019-08-02 12:51 ` Boris Brezillon
2019-08-05 5:51 ` Greg Ungerer
2019-08-07 16:05 ` Miquel Raynal
2019-08-08 0:43 ` Greg Ungerer
2019-08-08 16:36 ` Boris Brezillon
2019-08-09 5:20 ` Greg Ungerer
2019-08-09 6:23 ` Boris Brezillon
2019-08-09 6:55 ` Greg Ungerer
2019-08-09 7:32 ` Boris Brezillon
2019-08-09 13:57 ` Greg Ungerer
2019-08-09 13:59 ` Boris Brezillon
2019-08-12 2:50 ` Greg Ungerer
2019-08-12 4:04 ` Greg Ungerer
2019-08-12 7:31 ` Boris Brezillon
2019-08-13 0:50 ` Greg Ungerer
2021-01-28 9:45 ` Michael Nazzareno Trimarchi
2021-01-28 10:26 ` Miquel Raynal
2021-01-28 10:35 ` Michael Nazzareno Trimarchi
2021-01-28 11:55 ` Michael Nazzareno Trimarchi
2021-01-29 12:43 ` Greg Ungerer
2021-01-30 9:41 ` Michael Nazzareno Trimarchi
2021-02-01 14:13 ` Miquel Raynal
2021-02-01 14:32 ` Michael Nazzareno Trimarchi
2021-02-01 15:08 ` Michael Nazzareno Trimarchi
2021-02-01 15:14 ` Miquel Raynal
2021-02-01 15:17 ` Michael Nazzareno Trimarchi
2021-10-15 20:05 ` Michael Trimarchi
2021-10-15 20:12 ` Michael Nazzareno Trimarchi
2021-10-18 7:19 ` Miquel Raynal
2021-10-18 7:33 ` Michael Nazzareno Trimarchi
2021-10-18 7:43 ` Miquel Raynal
2021-10-04 5:54 ` Christian Eggers
2021-10-04 6:27 ` Michael Nazzareno Trimarchi
2021-10-04 15:33 ` Miquel Raynal
2021-10-04 16:06 ` Han Xu
2021-10-05 6:02 ` Christian Eggers
2021-10-08 9:55 ` Christian Eggers
2021-10-08 12:08 ` Stefan Riedmüller
2021-10-08 12:27 ` Miquel Raynal
2021-10-08 13:11 ` Christian Eggers
2021-10-08 13:29 ` Miquel Raynal
2021-10-08 13:36 ` Miquel Raynal
2021-10-08 13:49 ` Christian Eggers
2021-10-08 16:07 ` Miquel Raynal
2021-10-09 5:53 ` Michael Nazzareno Trimarchi
2021-10-11 6:46 ` Miquel Raynal
2021-10-12 9:02 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Stefan Riedmueller
2021-10-12 9:02 ` [RFC PATCH 2/2] gpmi-nand: Add ERR007117 protection for nfc_apply_timings Stefan Riedmueller
2021-10-13 5:01 ` Han Xu
2021-10-22 8:45 ` Stefan Riedmüller [this message]
2021-10-22 14:35 ` han.xu
2021-10-25 9:39 ` Stefan Riedmüller
2021-10-28 9:28 ` Stefan Riedmüller
2021-11-01 4:01 ` han.xu
2021-10-13 6:10 ` Christian Eggers
2021-10-13 6:00 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Christian Eggers
2021-10-09 6:26 ` GPMI iMX6ull timeout on DMA Christian Eggers
2021-10-13 6:15 ` Christian Eggers
2021-10-08 13:13 ` Christian Eggers
2021-10-08 13:30 ` Miquel Raynal
2021-10-09 6:33 ` Christian Eggers
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