@@ -948,6 +948,19 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
}
/**
+ * nand_reset - Reset and initialize a NAND device
+ * @chip: The NAND chip
+ *
+ * Returns 0 for success or negative error code otherwise
+ */
+int nand_reset(struct nand_chip *chip)
+{
+ chip->cmdfunc(&chip->mtd, NAND_CMD_RESET, -1, -1);
+
+ return 0;
+}
+
+/**
* __nand_unlock - [REPLACEABLE] unlocks specified locked blocks
* @mtd: mtd info
* @ofs: offset to start unlock from
@@ -1025,7 +1038,7 @@ int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
* some operation can also clear the bit 7 of status register
* eg. erase/program a locked block
*/
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ nand_reset(chip);
/* Check, if it is write protected */
if (nand_check_wp(mtd)) {
@@ -1084,7 +1097,7 @@ int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
* some operation can also clear the bit 7 of status register
* eg. erase/program a locked block
*/
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ nand_reset(chip);
/* Check, if it is write protected */
if (nand_check_wp(mtd)) {
@@ -2788,7 +2801,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
* if we don't do this. I have no clue why, but I seem to have 'fixed'
* it in the doc2000 driver in August 1999. dwmw2.
*/
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ nand_reset(chip);
/* Check, if it is write protected */
if (nand_check_wp(mtd)) {
@@ -3829,7 +3842,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
* Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx)
* after power-up.
*/
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ nand_reset(chip);
/* Send the command for reading device ID */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
@@ -4161,7 +4174,7 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
for (i = 1; i < maxchips; i++) {
chip->select_chip(mtd, i);
/* See comment in nand_get_flash_type for reset */
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ nand_reset(chip);
/* Send the command for reading device ID */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
@@ -1093,4 +1093,8 @@ int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, int page);
/* Default read_oob syndrome implementation */
int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
int page);
+
+/* Reset and initialize a NAND device */
+int nand_reset(struct nand_chip *chip);
+
#endif /* __LINUX_MTD_NAND_H */
When NAND devices are resetted some initialization may have to be done, like for example they have to be configured for the timing mode that shall be used. To get a common place where this initialization can be implemented create a nand_reset() function. This currently only issues a NAND_CMD_RESET to the NAND device. The places issuing this command manually are replaced with a call to nand_reset(). Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- drivers/mtd/nand/nand_base.c | 23 ++++++++++++++++++----- include/linux/mtd/nand.h | 4 ++++ 2 files changed, 22 insertions(+), 5 deletions(-)