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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>
This commit is contained in:
Stephen Warren 2013-03-26 20:37:58 -06:00 committed by Mark Brown
parent 543bb255a1
commit f4b97eb506
1 changed files with 1 additions and 35 deletions
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36
drivers/spi/spi-bcm2835.c
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@ -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;