spi: convert drivers to use bits_per_word_mask

Fill in the recently added spi_master.bits_per_word_mask field in as
many drivers as possible. Make related cleanups, such as removing any
redundant error-checking, or empty setup callbacks.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 11 deletions

diff --git a/drivers/spi/spi-au1550.c b/drivers/spi/spi-au1550.c
index 44dd34b6ad09..d736fa942020 100644
--- a/drivers/spi/spi-au1550.c
+++ b/drivers/spi/spi-au1550.c
@@ -248,11 +248,6 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
                         hz = t->speed_hz;
         }
 
-        if (bpw < 4 || bpw > 24) {
-                dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",
-                        bpw);
-                return -EINVAL;
-        }
         if (hz > spi->max_speed_hz || hz > hw->freq_max || hz < hw->freq_min) {
                 dev_err(&spi->dev, "setupxfer: clock rate=%d out of range\n",
                         hz);
@@ -296,12 +291,6 @@ static int au1550_spi_setup(struct spi_device *spi)
 {
         struct au1550_spi *hw = spi_master_get_devdata(spi->master);
 
-        if (spi->bits_per_word < 4 || spi->bits_per_word > 24) {
-                dev_err(&spi->dev, "setup: invalid bits_per_word=%d\n",
-                        spi->bits_per_word);
-                return -EINVAL;
-        }
-
         if (spi->max_speed_hz == 0)
                 spi->max_speed_hz = hw->freq_max;
         if (spi->max_speed_hz > hw->freq_max
@@ -782,6 +771,7 @@ static int au1550_spi_probe(struct platform_device *pdev)
 
         /* the spi->mode bits understood by this driver: */
         master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
+        master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 24);
 
         hw = spi_master_get_devdata(master);