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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>
This commit is contained in:
Scott Ellis 2010-03-10 14:23:13 -07:00 committed by Grant Likely
parent 5e7749436d
commit 9bd4517ddc
1 changed files with 6 additions and 2 deletions
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8
drivers/spi/omap2_mcspi.c
View File

@ -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;