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Commit d6fed9e9 authored by Alexander Clouter's avatar Alexander Clouter Committed by David Woodhouse
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mtd: extend plat_nand for (read|write)_buf 



This patch adds (write|read)_buf callbacks to plat_nand.

The NAND on the TS-7800 provisioned by the FPGA allows readw() and
readl() to be used which gives a 2.5x speed up.  To be able to use this
from the plat_nand driver a hook for read_buf (and also write_buf whilst
we are in there) need to be made available.  This patch adds the hook.

Signed-off-by: default avatarAlexander Clouter <alex@digriz.org.uk>
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent a0645ce9

drivers/mtd/nand/plat_nand.c

+2 −0
Original line number Diff line number Diff line
@@ -61,6 +61,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev) 
	data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl;

	data->chip.dev_ready = pdata->ctrl.dev_ready;

	data->chip.select_chip = pdata->ctrl.select_chip;

	data->chip.write_buf = pdata->ctrl.write_buf;

	data->chip.read_buf = pdata->ctrl.read_buf;

	data->chip.chip_delay = pdata->chip.chip_delay;

	data->chip.options |= pdata->chip.options;

include/linux/mtd/nand.h

+6 −0
Original line number Diff line number Diff line
@@ -584,6 +584,8 @@ struct platform_nand_chip { 
 * @select_chip:	platform specific chip select function

 * @cmd_ctrl:		platform specific function for controlling

 *			ALE/CLE/nCE. Also used to write command and address

 * @write_buf:		platform specific function for write buffer

 * @read_buf:		platform specific function for read buffer

 * @priv:		private data to transport driver specific settings

 *

 * All fields are optional and depend on the hardware driver requirements
@@ -594,6 +596,10 @@ struct platform_nand_ctrl { 
	void		(*select_chip)(struct mtd_info *mtd, int chip);

	void		(*cmd_ctrl)(struct mtd_info *mtd, int dat,

				    unsigned int ctrl);

	void		(*write_buf)(struct mtd_info *mtd,

				    const uint8_t *buf, int len);

	void		(*read_buf)(struct mtd_info *mtd,

				    uint8_t *buf, int len);

	void		*priv;

};