spi: omap2-mcspi: Convert to let spi core validate transfer speed

Set master->max_speed_hz and master->min_speed_hz then spi core will handle
checking transfer speed. So we can remove the same checking in this driver.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 3 insertions, 8 deletions

diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index d90edaaa7f69..48d218e5fa01 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1213,8 +1213,7 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
                 void            *rx_buf = t->rx_buf;
                 unsigned        len = t->len;
 
-                if (t->speed_hz > OMAP2_MCSPI_MAX_FREQ
-                                || (len && !(rx_buf || tx_buf))) {
+                if ((len && !(rx_buf || tx_buf))) {
                         dev_dbg(mcspi->dev, "transfer: %d Hz, %d %s%s, %d bpw\n",
                                         t->speed_hz,
                                         len,
@@ -1223,12 +1222,6 @@ static int omap2_mcspi_transfer_one_message(struct spi_master *master,
                                         t->bits_per_word);
                         return -EINVAL;
                 }
-                if (t->speed_hz && t->speed_hz < (OMAP2_MCSPI_MAX_FREQ >> 15)) {
-                        dev_dbg(mcspi->dev, "speed_hz %d below minimum %d Hz\n",
-                                        t->speed_hz,
-                                        OMAP2_MCSPI_MAX_FREQ >> 15);
-                        return -EINVAL;
-                }
 
                 if (m->is_dma_mapped || len < DMA_MIN_BYTES)
                         continue;
@@ -1340,6 +1333,8 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
         master->transfer_one_message = omap2_mcspi_transfer_one_message;
         master->cleanup = omap2_mcspi_cleanup;
         master->dev.of_node = node;
+        master->max_speed_hz = OMAP2_MCSPI_MAX_FREQ;
+        master->min_speed_hz = OMAP2_MCSPI_MAX_FREQ >> 15;
 
         platform_set_drvdata(pdev, master);