diff options
| author | Huang Shijie <b32955@freescale.com> | 2014-04-28 11:53:38 +0800 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-11-05 00:26:06 -0800 |
| commit | 0b78a2cf2a73b5f32ffda8cde7866ca61ce0e0b7 (patch) | |
| tree | 3dcf558989b2bc68416ec9abbf97556fe366be84 /drivers/mtd | |
| parent | 438320dd34a4d0b2b177fbae749c3b9d00532faf (diff) | |
| download | linux-0b78a2cf2a73b5f32ffda8cde7866ca61ce0e0b7.tar.bz2 | |
mtd: spi-nor: fix the wrong dummy value
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 <b32955@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 5 | ||||
| -rw-r--r-- | 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 ed827cf894e4..5d4482512e36 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 bytes */ + 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 a98c134e51b6..ea6516d120e7 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -98,7 +98,7 @@ 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; } |