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Commit cf24dc85 authored by Adrian Hunter's avatar Adrian Hunter Committed by David Woodhouse
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mtd: OneNAND: add enable / disable methods to onenand_chip 



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: default avatarAdrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 8fffed8c

drivers/mtd/onenand/onenand_base.c

+4 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/mtd/onenand.h

+2 −0
Original line number Diff line number Diff line
@@ -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;