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authorScott Ellis <scott@jumpnowtek.com>2010-03-10 14:23:13 -0700
committerGrant Likely <grant.likely@secretlab.ca>2010-03-10 14:23:13 -0700
commit9bd4517ddc51c803784778ab52e6f0bc03b77a52 (patch)
tree971c3b5a412ea3b4791f84deaa195bbfbf6a7422 /drivers/spi
parent5e7749436d576a525d7b2a4bcffb17b3364b9e00 (diff)
downloadlinux-9bd4517ddc51c803784778ab52e6f0bc03b77a52.tar.bz2
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.c8
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;