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>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index 28ffd4e8bb2f..47a2105b9671 100644
--- a/drivers/mtd/nand/plat_nand.c
+++ b/drivers/mtd/nand/plat_nand.c
@@ -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;
 
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 7efb9be34662..0e35375ea795 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -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;
 };