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Commit b88730ad authored by Sascha Hauer's avatar Sascha Hauer Committed by Boris Brezillon
Browse files

mtd: nand: Add function to convert ONFI mode to data_interface 



onfi_init_data_interface() initializes a data interface with
values from a given ONFI mode.

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
parent b1dd3ca2

drivers/mtd/nand/nand_timings.c

+29 −0
Original line number Diff line number Diff line
@@ -269,3 +269,32 @@ const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode) 
	return &onfi_sdr_timings[mode].timings.sdr;

}

EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings);



/**

 * onfi_init_data_interface - [NAND Interface] Initialize a data interface from

 * given ONFI mode

 * @iface: The data interface to be initialized

 * @mode: The ONFI timing mode

 */

int onfi_init_data_interface(struct nand_chip *chip,

			     struct nand_data_interface *iface,

			     enum nand_data_interface_type type,

			     int timing_mode)

{

	if (type != NAND_SDR_IFACE)

		return -EINVAL;



	if (timing_mode < 0 || timing_mode >= ARRAY_SIZE(onfi_sdr_timings))

		return -EINVAL;



	*iface = onfi_sdr_timings[timing_mode];



	/*

	 * TODO: initialize timings that cannot be deduced from timing mode:

	 * tR, tPROG, tCCS, ...

	 * These information are part of the ONFI parameter page.

	 */



	return 0;

}

EXPORT_SYMBOL(onfi_init_data_interface);

include/linux/mtd/nand.h

+5 −0
Original line number Diff line number Diff line
@@ -1112,6 +1112,11 @@ static inline int onfi_get_sync_timing_mode(struct nand_chip *chip) 
	return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);

}



int onfi_init_data_interface(struct nand_chip *chip,

			     struct nand_data_interface *iface,

			     enum nand_data_interface_type type,

			     int timing_mode);



/*

 * Check if it is a SLC nand.

 * The !nand_is_slc() can be used to check the MLC/TLC nand chips.