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>
diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index 317f564..e35c19c 100644
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -643,21 +643,16 @@
/* Bits per word setup */
bits_per_word = transfer->bits_per_word;
- if (bits_per_word % 16 == 0) {
+ if (bits_per_word == 16) {
drv_data->n_bytes = bits_per_word/8;
drv_data->len = (transfer->len) >> 1;
cr_width = BIT_CTL_WORDSIZE;
drv_data->ops = &bfin_bfin_spi_transfer_ops_u16;
- } else if (bits_per_word % 8 == 0) {
+ } else if (bits_per_word == 8) {
drv_data->n_bytes = bits_per_word/8;
drv_data->len = transfer->len;
cr_width = 0;
drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
- } else {
- dev_err(&drv_data->pdev->dev, "transfer: unsupported bits_per_word\n");
- message->status = -EINVAL;
- bfin_spi_giveback(drv_data);
- return;
}
cr = bfin_read(&drv_data->regs->ctl) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE);
cr |= cr_width;
@@ -808,13 +803,13 @@
bfin_write(&drv_data->regs->tdbr, chip->idle_tx_val);
else {
int loop;
- if (bits_per_word % 16 == 0) {
+ if (bits_per_word == 16) {
u16 *buf = (u16 *)drv_data->tx;
for (loop = 0; loop < bits_per_word / 16;
loop++) {
bfin_write(&drv_data->regs->tdbr, *buf++);
}
- } else if (bits_per_word % 8 == 0) {
+ } else if (bits_per_word == 8) {
u8 *buf = (u8 *)drv_data->tx;
for (loop = 0; loop < bits_per_word / 8; loop++)
bfin_write(&drv_data->regs->tdbr, *buf++);
@@ -1033,12 +1028,6 @@
chip->ctl_reg &= bfin_ctl_reg;
}
- if (spi->bits_per_word % 8) {
- dev_err(&spi->dev, "%d bits_per_word is not supported\n",
- spi->bits_per_word);
- goto error;
- }
-
/* translate common spi framework into our register */
if (spi->mode & ~(SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST)) {
dev_err(&spi->dev, "unsupported spi modes detected\n");
@@ -1299,7 +1288,7 @@
/* the spi->mode bits supported by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
-
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->bus_num = pdev->id;
master->num_chipselect = platform_info->num_chipselect;
master->cleanup = bfin_spi_cleanup;