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>

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;