From: Boris Brezillon <boris.brezillon@collabora.com> To: Apurva Nandan <a-nandan@ti.com> Cc: Miquel Raynal <miquel.raynal@bootlin.com>, Richard Weinberger <richard@nod.at>, Vignesh Raghavendra <vigneshr@ti.com>, Mark Brown <broonie@kernel.org>, Patrice Chotard <patrice.chotard@foss.st.com>, Christophe Kerello <christophe.kerello@foss.st.com>, Daniel Palmer <daniel@0x0f.com>, Alexander Lobakin <alobakin@pm.me>, <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <linux-spi@vger.kernel.org>, <p.yadav@ti.com> Subject: Re: [PATCH v3 12/17] mtd: spinand: Add mtd_suspend() to disable Octal DTR mode at suspend Date: Mon, 3 Jan 2022 11:17:25 +0100 [thread overview] Message-ID: <20220103111725.3e3ce291@collabora.com> (raw) In-Reply-To: <20220101074250.14443-13-a-nandan@ti.com> On Sat, 1 Jan 2022 13:12:45 +0530 Apurva Nandan <a-nandan@ti.com> wrote: > The flash might or might not have gone a power-down during sleep. > Hence, its SPI IO mode is unpredictable for the core at the time of > resume. To ensure proper reinitialization during resume, disable the > Octal DTR SPI IO mode and bring the flash to 1S-1S-1S mode when > performing suspend using mtd_suspend(). > > Signed-off-by: Apurva Nandan <a-nandan@ti.com> > --- > drivers/mtd/nand/spi/core.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c > index 2fd08085db6f..9d1c72634e5a 100644 > --- a/drivers/mtd/nand/spi/core.c > +++ b/drivers/mtd/nand/spi/core.c > @@ -1307,6 +1307,16 @@ static void spinand_mtd_resume(struct mtd_info *mtd) > spinand_ecc_enable(spinand, false); > } > > +static int spinand_mtd_suspend(struct mtd_info *mtd) > +{ > + struct spinand_device *spinand = mtd_to_spinand(mtd); > + > + if (spinand->ctrl_ops->protocol == SPINAND_8D_8D_8D) > + return spinand_init_octal_dtr_disable(spinand); Ok, so you're calling it here. I'd re-order commmits so that DTR support is added after the suspend hook is defined, even if this hook does nothing at first. This way you don't have an unused warning in the previous commit, and most importantly, you don't enter 8DTR before you're sure things will be set back to 1S when entering suspend. > + > + return 0; > +} > + > static int spinand_init(struct spinand_device *spinand) > { > struct device *dev = &spinand->spimem->spi->dev; > @@ -1381,6 +1391,7 @@ static int spinand_init(struct spinand_device *spinand) > mtd->_erase = spinand_mtd_erase; > mtd->_max_bad_blocks = nanddev_mtd_max_bad_blocks; > mtd->_resume = spinand_mtd_resume; > + mtd->_suspend = spinand_mtd_suspend; > > if (nand->ecc.engine) { > ret = mtd_ooblayout_count_freebytes(mtd);
WARNING: multiple messages have this Message-ID (diff)
From: Boris Brezillon <boris.brezillon@collabora.com> To: Apurva Nandan <a-nandan@ti.com> Cc: Miquel Raynal <miquel.raynal@bootlin.com>, Richard Weinberger <richard@nod.at>, Vignesh Raghavendra <vigneshr@ti.com>, Mark Brown <broonie@kernel.org>, Patrice Chotard <patrice.chotard@foss.st.com>, Christophe Kerello <christophe.kerello@foss.st.com>, Daniel Palmer <daniel@0x0f.com>, Alexander Lobakin <alobakin@pm.me>, <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <linux-spi@vger.kernel.org>, <p.yadav@ti.com> Subject: Re: [PATCH v3 12/17] mtd: spinand: Add mtd_suspend() to disable Octal DTR mode at suspend Date: Mon, 3 Jan 2022 11:17:25 +0100 [thread overview] Message-ID: <20220103111725.3e3ce291@collabora.com> (raw) In-Reply-To: <20220101074250.14443-13-a-nandan@ti.com> On Sat, 1 Jan 2022 13:12:45 +0530 Apurva Nandan <a-nandan@ti.com> wrote: > The flash might or might not have gone a power-down during sleep. > Hence, its SPI IO mode is unpredictable for the core at the time of > resume. To ensure proper reinitialization during resume, disable the > Octal DTR SPI IO mode and bring the flash to 1S-1S-1S mode when > performing suspend using mtd_suspend(). > > Signed-off-by: Apurva Nandan <a-nandan@ti.com> > --- > drivers/mtd/nand/spi/core.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c > index 2fd08085db6f..9d1c72634e5a 100644 > --- a/drivers/mtd/nand/spi/core.c > +++ b/drivers/mtd/nand/spi/core.c > @@ -1307,6 +1307,16 @@ static void spinand_mtd_resume(struct mtd_info *mtd) > spinand_ecc_enable(spinand, false); > } > > +static int spinand_mtd_suspend(struct mtd_info *mtd) > +{ > + struct spinand_device *spinand = mtd_to_spinand(mtd); > + > + if (spinand->ctrl_ops->protocol == SPINAND_8D_8D_8D) > + return spinand_init_octal_dtr_disable(spinand); Ok, so you're calling it here. I'd re-order commmits so that DTR support is added after the suspend hook is defined, even if this hook does nothing at first. This way you don't have an unused warning in the previous commit, and most importantly, you don't enter 8DTR before you're sure things will be set back to 1S when entering suspend. > + > + return 0; > +} > + > static int spinand_init(struct spinand_device *spinand) > { > struct device *dev = &spinand->spimem->spi->dev; > @@ -1381,6 +1391,7 @@ static int spinand_init(struct spinand_device *spinand) > mtd->_erase = spinand_mtd_erase; > mtd->_max_bad_blocks = nanddev_mtd_max_bad_blocks; > mtd->_resume = spinand_mtd_resume; > + mtd->_suspend = spinand_mtd_suspend; > > if (nand->ecc.engine) { > ret = mtd_ooblayout_count_freebytes(mtd); ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2022-01-03 10:17 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-01 7:42 [PATCH v3 00/17] mtd: spinand: Add Octal DTR SPI (8D-8D-8D) mode support Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 01/17] spi: spi-mem: Add DTR templates for cmd, address, dummy and data phase Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-04 14:52 ` Mark Brown 2022-01-04 14:52 ` Mark Brown 2022-01-04 15:31 ` Boris Brezillon 2022-01-04 15:31 ` Boris Brezillon 2022-01-05 5:50 ` Pratyush Yadav 2022-01-05 5:50 ` Pratyush Yadav 2022-01-05 7:36 ` Boris Brezillon 2022-01-05 7:36 ` Boris Brezillon 2022-01-05 8:24 ` Tudor.Ambarus 2022-01-05 8:24 ` Tudor.Ambarus 2022-01-01 7:42 ` [PATCH v3 02/17] mtd: spinand: Define macros for Octal DTR ops Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 03/17] mtd: spinand: Add enum spinand_protocol to indicate current SPI IO mode Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 10:05 ` Boris Brezillon 2022-01-03 10:05 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 04/17] mtd: spinand: Rename 'op_templates' to 'data_ops' Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 9:48 ` Boris Brezillon 2022-01-03 9:48 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 05/17] mtd: spinand: Define ctrl_ops for non-page read/write op templates Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 10:01 ` Boris Brezillon 2022-01-03 10:01 ` Boris Brezillon 2022-01-03 10:36 ` Boris Brezillon 2022-01-03 10:36 ` Boris Brezillon 2022-02-15 15:33 ` Apurva Nandan 2022-02-15 15:33 ` Apurva Nandan 2022-02-15 17:37 ` Boris Brezillon 2022-02-15 17:37 ` Boris Brezillon 2022-03-02 15:30 ` Apurva Nandan 2022-03-02 15:30 ` Apurva Nandan 2022-03-02 20:05 ` Boris Brezillon 2022-03-02 20:05 ` Boris Brezillon 2022-03-10 7:57 ` Apurva Nandan 2022-03-10 7:57 ` Apurva Nandan 2022-03-10 8:40 ` Boris Brezillon 2022-03-10 8:40 ` Boris Brezillon 2022-03-14 11:47 ` Apurva Nandan 2022-03-14 11:47 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 06/17] mtd: spinand: Define default ctrl_ops in the core Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 07/17] mtd: spinand: Switch from op macros usage to 'ctrl_ops' " Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 08/17] mtd: spinand: Add support for manufacturer-based ctrl_ops variations Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 09/17] mtd: spinand: Add change_mode() in manufacturer_ops Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-05 9:52 ` Boris Brezillon 2022-01-05 9:52 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 10/17] mtd: spinand: Add pointer to probed flash's spinand_info Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 11/17] mtd: spinand: Allow enabling/disabling Octal DTR mode in the core Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 10:14 ` Boris Brezillon 2022-01-03 10:14 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 12/17] mtd: spinand: Add mtd_suspend() to disable Octal DTR mode at suspend Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 10:17 ` Boris Brezillon [this message] 2022-01-03 10:17 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 13/17] mtd: spinand: winbond: Add support for write volatile configuration register op Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 14/17] mtd: spinand: winbond: Add octal_dtr_enable/disable() in manufacturer_ops Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 15/17] mtd: spianand: winbond: Add change_mode() manufacturer_ops Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-03 10:27 ` Boris Brezillon 2022-01-03 10:27 ` Boris Brezillon 2022-01-01 7:42 ` [PATCH v3 16/17] mtd: spinand: winbond: Rename cache op_variants struct variable Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan 2022-01-01 7:42 ` [PATCH v3 17/17] mtd: spinand: winbond: Add support for Winbond W35N01JW SPI NAND flash Apurva Nandan 2022-01-01 7:42 ` Apurva Nandan
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