spi: bcm2835: make use of new bits_per_word_mask core feature

This driver only supports bits_per_word==8, so inform the SPI core of
this. Remove all the open-coded validation that's no longer needed.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 346601e..89c0b50 100644 (file)
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -182,23 +182,6 @@ static irqreturn_t bcm2835_spi_interrupt(int irq, void *dev_id)
        return IRQ_NONE;
 }
 
-static int bcm2835_spi_check_transfer(struct spi_device *spi,
-               struct spi_transfer *tfr)
-{
-       /* tfr==NULL when called from bcm2835_spi_setup() */
-       u32 bpw = tfr ? tfr->bits_per_word : spi->bits_per_word;
-
-       switch (bpw) {
-       case 8:
-               break;
-       default:
-               dev_err(&spi->dev, "unsupported bits_per_word=%d\n", bpw);
-               return -EINVAL;
-       }
-
-       return 0;
-}
-
 static int bcm2835_spi_start_transfer(struct spi_device *spi,
                struct spi_transfer *tfr)
 {
@@ -273,19 +256,6 @@ static int bcm2835_spi_finish_transfer(struct spi_device *spi,
        return 0;
 }
 
-static int bcm2835_spi_setup(struct spi_device *spi)
-{
-       int ret;
-
-       ret = bcm2835_spi_check_transfer(spi, NULL);
-       if (ret) {
-               dev_err(&spi->dev, "setup: invalid message\n");
-               return ret;
-       }
-
-       return 0;
-}
-
 static int bcm2835_spi_transfer_one(struct spi_master *master,
                struct spi_message *mesg)
 {
@@ -297,10 +267,6 @@ static int bcm2835_spi_transfer_one(struct spi_master *master,
        bool cs_change;
 
        list_for_each_entry(tfr, &mesg->transfers, transfer_list) {
-               err = bcm2835_spi_check_transfer(spi, tfr);
-               if (err)
-                       goto out;
-
                err = bcm2835_spi_start_transfer(spi, tfr);
                if (err)
                        goto out;
@@ -348,9 +314,9 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
        platform_set_drvdata(pdev, master);
 
        master->mode_bits = BCM2835_SPI_MODE_BITS;
+       master->bits_per_word_mask = BIT(8 - 1);
        master->bus_num = -1;
        master->num_chipselect = 3;
-       master->setup = bcm2835_spi_setup;
        master->transfer_one_message = bcm2835_spi_transfer_one;
        master->dev.of_node = pdev->dev.of_node;