For the DDR Quad read, the dummy cycles maybe 3 or 6 which is less then 8.
The dummy cycles is actually 8 for SPI fast/dual/quad read.
This patch makes preparations for the DDR quad read, it fixes the wrong dummy
value for both the spi-nor.c and m25p80.c.
Signed-off-by: Huang Shijie <b32...@freescale.com>
---
drivers/mtd/devices/m25p80.c | 5 ++++-
drivers/mtd/spi-nor/spi-nor.c | 2 +-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 1557d8f..693e25f 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -128,9 +128,12 @@ static int m25p80_read(struct spi_nor *nor, loff_t from,
size_t len,
struct spi_device *spi = flash->spi;
struct spi_transfer t[2];
struct spi_message m;
- int dummy = nor->read_dummy;
+ unsigned int dummy = nor->read_dummy;
int ret;
+ /* convert the dummy cycles to the number of byte */
+ dummy /= 8;
+
/* Wait till previous write/erase is done. */
ret = nor->wait_till_ready(nor);
if (ret)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index f76f3fc..1a12f81 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -77,7 +77,7 @@ static inline int spi_nor_read_dummy_cycles(struct spi_nor
*nor)
case SPI_NOR_FAST:
case SPI_NOR_DUAL:
case SPI_NOR_QUAD:
- return 1;
+ return 8;
case SPI_NOR_NORMAL:
return 0;
}
--
1.7.2.rc3
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
