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spi: convert drivers to use bits_per_word_mask

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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>
This commit is contained in:
Stephen Warren
2013-05-21 20:36:35 -06:00
committed by Mark Brown
parent 2922a8de99
commit 24778be20f
28 changed files with 46 additions and 280 deletions
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21
drivers/spi/spi-bfin5xx.c
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@@ -643,21 +643,16 @@ static void bfin_spi_pump_transfers(unsigned long data)
/* 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 @@ static void bfin_spi_pump_transfers(unsigned long data)
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 @@ static int bfin_spi_setup(struct spi_device *spi)
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 @@ static int bfin_spi_probe(struct platform_device *pdev)
/* 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;