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Subject[PATCH v2 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation
Date
Patch nand_suspend() & nand_resume() for manufacturer specific
suspend/resume operation.

Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
---
drivers/mtd/nand/raw/nand_base.c | 9 +++++++--
include/linux/mtd/rawnand.h | 2 ++
2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 5e318ff..2a9c5bb 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4323,6 +4323,8 @@ static int nand_suspend(struct mtd_info *mtd)
struct nand_chip *chip = mtd_to_nand(mtd);

mutex_lock(&chip->lock);
+ if (chip->_suspend)
+ chip->_suspend(chip);
chip->suspended = 1;
mutex_unlock(&chip->lock);

@@ -4338,11 +4340,14 @@ 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 2430ecd..6b14041 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1117,6 +1117,8 @@ struct nand_chip {

struct mutex lock;
unsigned int suspended : 1;
+ int (*_suspend)(struct nand_chip *chip);
+ void (*_resume)(struct nand_chip *chip);

uint8_t *oob_poi;
struct nand_controller *controller;
--
1.9.1
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