From: Boris Brezillon <boris.brezillon@collabora.com>
To: Mason Yang <masonccyang@mxic.com.tw>
Cc: vigneshr@ti.com, bbrezillon@kernel.org, juliensu@mxic.com.tw,
richard@nod.at, s.hauer@pengutronix.de, yuehaibing@huawei.com,
linux-kernel@vger.kernel.org, stefan@agner.ch,
rfontana@redhat.com, linux-mtd@lists.infradead.org,
frieder.schrempf@kontron.de, miquel.raynal@bootlin.com,
tglx@linutronix.de, allison@lohutok.net
Subject: Re: [PATCH v3 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation
Date: Tue, 10 Mar 2020 20:33:10 +0100 [thread overview]
Message-ID: <20200310203310.5fe74c57@collabora.com> (raw)
In-Reply-To: <1583220084-10890-4-git-send-email-masonccyang@mxic.com.tw>
On Tue, 3 Mar 2020 15:21:23 +0800
Mason Yang <masonccyang@mxic.com.tw> wrote:
> Patch nand_suspend() & nand_resume() for manufacturer specific
> suspend/resume operation.
>
> Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
> Reported-by: kbuild test robot <lkp@intel.com>
> Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
> ---
> drivers/mtd/nand/raw/nand_base.c | 11 ++++++++---
> include/linux/mtd/rawnand.h | 4 ++++
> 2 files changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index 769be81..b44e460 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -4327,7 +4327,9 @@ static int nand_suspend(struct mtd_info *mtd)
> struct nand_chip *chip = mtd_to_nand(mtd);
>
> mutex_lock(&chip->lock);
> - chip->suspended = 1;
> + if (chip->_suspend)
> + if (!chip->_suspend(chip))
> + chip->suspended = 1;
> mutex_unlock(&chip->lock);
>
> return 0;
> @@ -4342,11 +4344,14 @@ static void nand_resume(struct mtd_info *mtd)
> struct nand_chip *chip = mtd_to_nand(mtd);
>
> mutex_lock(&chip->lock);
> - if (chip->suspended)
> + if (chip->suspended) {
> + if (chip->_resume)
> + chip->_resume(chip);
> chip->suspended = 0;
> - else
> + } else {
> pr_err("%s called for a chip which is not in suspended state\n",
> __func__);
> + }
> mutex_unlock(&chip->lock);
> }
>
> diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
> index bc2fa3c..c0055ed 100644
> --- a/include/linux/mtd/rawnand.h
> +++ b/include/linux/mtd/rawnand.h
> @@ -1064,6 +1064,8 @@ struct nand_legacy {
> * @lock: lock protecting the suspended field. Also used to
> * serialize accesses to the NAND device.
> * @suspended: set to 1 when the device is suspended, 0 when it's not.
> + * @_suspend: [REPLACEABLE] specific NAND device suspend operation
> + * @_resume: [REPLACEABLE] specific NAND device resume operation
> * @bbt: [INTERN] bad block table pointer
> * @bbt_td: [REPLACEABLE] bad block table descriptor for flash
> * lookup.
> @@ -1119,6 +1121,8 @@ struct nand_chip {
>
> struct mutex lock;
> unsigned int suspended : 1;
> + int (*_suspend)(struct nand_chip *chip);
> + void (*_resume)(struct nand_chip *chip);
I thought we agreed on not prefixing new hooks with _ ?
>
> uint8_t *oob_poi;
> struct nand_controller *controller;
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next prev parent reply other threads:[~2020-03-10 19:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 7:21 [PATCH v3 0/4] mtd: rawnand: Add support Macronix Block Portection & Deep Power Down mode Mason Yang
2020-03-03 7:21 ` [PATCH v3 1/4] mtd: rawnand: Add support manufacturer specific lock/unlock operation Mason Yang
2020-03-10 18:30 ` Miquel Raynal
2020-03-10 19:27 ` Boris Brezillon
2020-03-11 2:40 ` masonccyang
2020-03-11 7:25 ` Miquel Raynal
2020-03-03 7:21 ` [PATCH v3 2/4] mtd: rawnand: Add support Macronix Block Protection function Mason Yang
2020-03-03 7:21 ` [PATCH v3 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation Mason Yang
2020-03-10 18:30 ` Miquel Raynal
2020-03-10 19:33 ` Boris Brezillon [this message]
2020-03-11 5:40 ` masonccyang
2020-03-11 7:43 ` Miquel Raynal
2020-03-11 7:56 ` Boris Brezillon
2020-03-12 1:45 ` masonccyang
2020-03-10 19:39 ` Boris Brezillon
2020-03-10 19:41 ` Boris Brezillon
2020-03-11 6:13 ` masonccyang
2020-03-11 8:01 ` Boris Brezillon
2020-03-12 1:48 ` masonccyang
2020-03-03 7:21 ` [PATCH v3 4/4] mtd: rawnand: Add support Macronix deep power down mode Mason Yang
2020-03-09 13:14 ` [PATCH v3 0/4] mtd: rawnand: Add support Macronix Block Portection & Deep Power Down mode Miquel Raynal
2020-03-10 2:30 ` masonccyang
2020-03-10 7:44 ` Miquel Raynal
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