mtd: rawnand: Add support for manufacturer specific suspend/resume operation (adc6162b) · Commits · 戴 / test

drivers/mtd/nand/raw/nand_base.c

+13 −4

Original line number	Diff line number	Diff line
		@@ -4326,16 +4326,22 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
		/**
		* nand_suspend - [MTD Interface] Suspend the NAND flash
		* @mtd: MTD device structure
		*
		* Returns 0 for success or negative error code otherwise.
		*/
		static int nand_suspend(struct mtd_info *mtd)
		{
		struct nand_chip *chip = mtd_to_nand(mtd);
		int ret = 0;

		mutex_lock(&chip->lock);
		if (chip->suspend)
		ret = chip->suspend(chip);
		if (!ret)
		chip->suspended = 1;
		mutex_unlock(&chip->lock);

		return 0;
		return ret;
		}

		/**
		@@ -4347,11 +4353,14 @@ static void nand_resume(struct mtd_info *mtd)
		struct nand_chip *chip = mtd_to_nand(mtd);

		mutex_lock(&chip->lock);
		if (chip->suspended)
		if (chip->suspended) {
		if (chip->resume)
		chip->resume(chip);
		chip->suspended = 0;
		else
		} else {
		pr_err("%s called for a chip which is not in suspended state\n",
		__func__);
		}
		mutex_unlock(&chip->lock);
		}

+4 −0

Original line number	Diff line number	Diff line
		@@ -1064,6 +1064,8 @@ struct nand_legacy {
		* @lock: lock protecting the suspended field. Also used to
		* serialize accesses to the NAND device.
		* @suspended: set to 1 when the device is suspended, 0 when it's not.
		* @suspend: [REPLACEABLE] specific NAND device suspend operation
		* @resume: [REPLACEABLE] specific NAND device resume operation
		* @bbt: [INTERN] bad block table pointer
		* @bbt_td: [REPLACEABLE] bad block table descriptor for flash
		* lookup.
		@@ -1119,6 +1121,8 @@ struct nand_chip {

		struct mutex lock;
		unsigned int suspended : 1;
		int (suspend)(struct nand_chip chip);
		void (resume)(struct nand_chip chip);

		uint8_t *oob_poi;
		struct nand_controller *controller;