mtd: rawnand: Add support for manufacturer specific lock/unlock operation (92270086) · Commits · 戴 / test

drivers/mtd/nand/raw/nand_base.c

+34 −2

Original line number	Diff line number	Diff line
		@@ -4365,6 +4365,38 @@ static void nand_shutdown(struct mtd_info *mtd)
		nand_suspend(mtd);
		}

		/**
		* nand_lock - [MTD Interface] Lock the NAND flash
		* @mtd: MTD device structure
		* @ofs: offset byte address
		* @len: number of bytes to lock (must be a multiple of block/page size)
		*/
		static int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
		{
		struct nand_chip *chip = mtd_to_nand(mtd);

		if (!chip->lock_area)
		return -ENOTSUPP;

		return chip->lock_area(chip, ofs, len);
		}

		/**
		* nand_unlock - [MTD Interface] Unlock the NAND flash
		* @mtd: MTD device structure
		* @ofs: offset byte address
		* @len: number of bytes to unlock (must be a multiple of block/page size)
		*/
		static int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
		{
		struct nand_chip *chip = mtd_to_nand(mtd);

		if (!chip->unlock_area)
		return -ENOTSUPP;

		return chip->unlock_area(chip, ofs, len);
		}

		/* Set default functions */
		static void nand_set_defaults(struct nand_chip *chip)
		{
		@@ -5791,8 +5823,8 @@ static int nand_scan_tail(struct nand_chip *chip)
		mtd->_read_oob = nand_read_oob;
		mtd->_write_oob = nand_write_oob;
		mtd->_sync = nand_sync;
		mtd->_lock = NULL;
		mtd->_unlock = NULL;
		mtd->_lock = nand_lock;
		mtd->_unlock = nand_unlock;
		mtd->_suspend = nand_suspend;
		mtd->_resume = nand_resume;
		mtd->_reboot = nand_shutdown;

+5 −0

Original line number	Diff line number	Diff line
		@@ -1077,6 +1077,8 @@ struct nand_legacy {
		* @manufacturer: [INTERN] Contains manufacturer information
		* @manufacturer.desc: [INTERN] Contains manufacturer's description
		* @manufacturer.priv: [INTERN] Contains manufacturer private information
		* @lock_area: [REPLACEABLE] specific NAND chip lock operation
		* @unlock_area: [REPLACEABLE] specific NAND chip unlock operation
		*/

		struct nand_chip {
		@@ -1136,6 +1138,9 @@ struct nand_chip {
		const struct nand_manufacturer *desc;
		void *priv;
		} manufacturer;

		int (lock_area)(struct nand_chip chip, loff_t ofs, uint64_t len);
		int (unlock_area)(struct nand_chip chip, loff_t ofs, uint64_t len);
		};

		extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;