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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: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
hifive-unleashed-5.1
Alexander Clouter 2009-05-11 19:28:01 +01:00 committed by David Woodhouse
parent a0645ce9ba
commit d6fed9e9fc
2 changed files with 8 additions and 0 deletions
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2
drivers/mtd/nand/plat_nand.c
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@ -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;

6
include/linux/mtd/nand.h
View File

@ -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;
};