diff options
| author | Scott Ellis <scott@jumpnowtek.com> | 2010-03-10 14:23:13 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-03-10 14:23:13 -0700 |
| commit | 9bd4517ddc51c803784778ab52e6f0bc03b77a52 (patch) | |
| tree | 971c3b5a412ea3b4791f84deaa195bbfbf6a7422 /drivers/spi | |
| parent | 5e7749436d576a525d7b2a4bcffb17b3364b9e00 (diff) | |
| download | lwn-9bd4517ddc51c803784778ab52e6f0bc03b77a52.tar.gz lwn-9bd4517ddc51c803784778ab52e6f0bc03b77a52.zip | |
spi/omap2_mcspi: Use transaction speed if provided
omap2_mcspi_transfer() gets called in omap2_mcspi_work() when the
transaction speed_hz or bits_per_word fields are non-zero.
omap2_mcspi_transfer() does not look at the speed_hz field so
the override speed value is ignored.
The code should probably change to one of these options.
1. Skip the call to omap2_mcsp_transfer() if the only reason was a
non-zero speed_hz and it's not going to be used.
2. Use the new speed_hz value provided
The patch below uses the speed_hz value.
Signed-off-by: Scott Ellis <scott@jumpnowtek.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/omap2_mcspi.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c index 87d44eeaaa7b..4dd786b99b8b 100644 --- a/drivers/spi/omap2_mcspi.c +++ b/drivers/spi/omap2_mcspi.c @@ -578,6 +578,7 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi, struct spi_master *spi_cntrl; u32 l = 0, div = 0; u8 word_len = spi->bits_per_word; + u32 speed_hz = spi->max_speed_hz; mcspi = spi_master_get_devdata(spi->master); spi_cntrl = mcspi->master; @@ -587,9 +588,12 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi, cs->word_len = word_len; - if (spi->max_speed_hz) { + if (t && t->speed_hz) + speed_hz = t->speed_hz; + + if (speed_hz) { while (div <= 15 && (OMAP2_MCSPI_MAX_FREQ / (1 << div)) - > spi->max_speed_hz) + > speed_hz) div++; } else div = 15; |