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Subject[RFC 01/47] mtd: nand: export useful functions from core driver
Date
These functions are utilised by the STM BCH NAND Controller driver.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/nand_base.c | 18 +++++++++++-------
include/linux/mtd/nand.h | 6 ++++++
2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index bd39f7b..070505d 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -90,7 +90,7 @@ static struct nand_ecclayout nand_oob_128 = {
.length = 78} }
};

-static int nand_get_device(struct mtd_info *mtd, int new_state);
+int nand_get_device(struct mtd_info *mtd, int new_state);

static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
struct mtd_oob_ops *ops);
@@ -128,7 +128,7 @@ static int check_offs_len(struct mtd_info *mtd,
*
* Release chip lock and wake up anyone waiting on the device.
*/
-static void nand_release_device(struct mtd_info *mtd)
+void nand_release_device(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;

@@ -139,6 +139,7 @@ static void nand_release_device(struct mtd_info *mtd)
wake_up(&chip->controller->wq);
spin_unlock(&chip->controller->lock);
}
+EXPORT_SYMBOL_GPL(nand_release_device);

/**
* nand_read_byte - [DEFAULT] read one byte from the chip
@@ -736,8 +737,7 @@ static void panic_nand_get_device(struct nand_chip *chip,
*
* Get the device and lock it for exclusive access
*/
-static int
-nand_get_device(struct mtd_info *mtd, int new_state)
+int nand_get_device(struct mtd_info *mtd, int new_state)
{
struct nand_chip *chip = mtd->priv;
spinlock_t *lock = &chip->controller->lock;
@@ -769,6 +769,7 @@ retry:
remove_wait_queue(wq, &wait);
goto retry;
}
+EXPORT_SYMBOL_GPL(nand_get_device);

/**
* panic_nand_wait - [GENERIC] wait until the command is done
@@ -2665,7 +2666,7 @@ erase_exit:
*
* Sync is actually a wait for chip ready function.
*/
-static void nand_sync(struct mtd_info *mtd)
+void nand_sync(struct mtd_info *mtd)
{
pr_debug("%s: called\n", __func__);

@@ -2674,6 +2675,7 @@ static void nand_sync(struct mtd_info *mtd)
/* Release it and go back */
nand_release_device(mtd);
}
+EXPORT_SYMBOL_GPL(nand_sync);

/**
* nand_block_isbad - [MTD Interface] Check if block at offset is bad
@@ -2757,16 +2759,17 @@ static int nand_onfi_get_features(struct mtd_info *mtd, struct nand_chip *chip,
* nand_suspend - [MTD Interface] Suspend the NAND flash
* @mtd: MTD device structure
*/
-static int nand_suspend(struct mtd_info *mtd)
+int nand_suspend(struct mtd_info *mtd)
{
return nand_get_device(mtd, FL_PM_SUSPENDED);
}
+EXPORT_SYMBOL(nand_suspend);

/**
* nand_resume - [MTD Interface] Resume the NAND flash
* @mtd: MTD device structure
*/
-static void nand_resume(struct mtd_info *mtd)
+void nand_resume(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;

@@ -2776,6 +2779,7 @@ static void nand_resume(struct mtd_info *mtd)
pr_err("%s called for a chip which is not in suspended state\n",
__func__);
}
+EXPORT_SYMBOL(nand_resume);

/* Set default functions */
static void nand_set_defaults(struct nand_chip *chip, int busw)
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 9e6c8f9..f7b6a53 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -698,6 +698,12 @@ extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
int allowbbt);
extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, uint8_t *buf);
+extern void nand_sync(struct mtd_info *mtd);
+extern int nand_suspend(struct mtd_info *mtd);
+extern void nand_resume(struct mtd_info *mtd);
+
+extern int nand_get_device(struct mtd_info *mtd, int new_state);
+extern void nand_release_device(struct mtd_info *mtd);

/**
* struct platform_nand_chip - chip level device structure
--
1.8.3.2


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