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>
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index 87d44ee..4dd786b 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -578,6 +578,7 @@
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 @@
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;