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mtd: OneNAND: add enable / disable methods to onenand_chip

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Add enable / disable methods called from get_device() / release_device().
These can be used, for example, to allow the driver to prevent the voltage
regulator from being put to sleep while OneNAND is in use.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Adrian Hunter 2010-02-19 15:39:52 +01:00 committed by David Woodhouse
parent 8fffed8cfd
commit cf24dc85ff
2 changed files with 6 additions and 0 deletions
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4
drivers/mtd/onenand/onenand_base.c
View File

@ -948,6 +948,8 @@ static int onenand_get_device(struct mtd_info *mtd, int new_state)
if (this->state == FL_READY) {
this->state = new_state;
spin_unlock(&this->chip_lock);
if (new_state != FL_PM_SUSPENDED && this->enable)
this->enable(mtd);
break;
}
if (new_state == FL_PM_SUSPENDED) {
@ -974,6 +976,8 @@ static void onenand_release_device(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
if (this->state != FL_PM_SUSPENDED && this->disable)
this->disable(mtd);
/* Release the chip */
spin_lock(&this->chip_lock);
this->state = FL_READY;

2
include/linux/mtd/onenand.h
View File

@ -118,6 +118,8 @@ struct onenand_chip {
int (*chip_probe)(struct mtd_info *mtd);
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
int (*scan_bbt)(struct mtd_info *mtd);
int (*enable)(struct mtd_info *mtd);
int (*disable)(struct mtd_info *mtd);
struct completion complete;
int irq;