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Commit 41796c2e authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

[MTD] Add platform support for NAND 



Add the data structures necessary to provide platform device support
for NAND

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent a36ed299

include/linux/mtd/nand.h

+47 −0
Original line number Diff line number Diff line
@@ -510,4 +510,51 @@ extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len, 
#define NAND_SMALL_BADBLOCK_POS		5

#define NAND_LARGE_BADBLOCK_POS		0



/**

 * struct platform_nand_chip - chip level device structure

 *

 * @nr_chips:		max. number of chips to scan for

 * @chip_offs:		chip number offset

 * @nr_partitions:	number of partitions pointed to be partitoons (or zero)

 * @partitions:		mtd partition list

 * @chip_delay:		R/B delay value in us

 * @options:		Option flags, e.g. 16bit buswidth

 * @priv:		hardware controller specific settings

 */

struct platform_nand_chip {

	int			nr_chips;

	int			chip_offset;

	int			nr_partitions;

	struct mtd_partition	*partitions;

	int 			chip_delay;

	unsigned int		options;

	void			*priv;

};



/**

 * struct platform_nand_ctrl - controller level device structure

 *

 * @hwcontrol:		platform specific hardware control structure

 * @dev_ready:		platform specific function to read ready/busy pin

 * @select_chip:	platform specific chip select function

 * @priv_data:		private data to transport driver specific settings

 *

 * All fields are optional and depend on the hardware driver requirements

 */

struct platform_nand_ctrl {

	void 		(*hwcontrol)(struct mtd_info *mtd, int cmd);

	int  		(*dev_ready)(struct mtd_info *mtd);

	void		(*select_chip)(struct mtd_info *mtd, int chip);

	void		*priv;

};



/* Some helpers to access the data structures */

static inline

struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)

{

	struct nand_chip *chip = mtd->priv;



	return chip->priv;

}



#endif /* __LINUX_MTD_NAND_H */