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-dw.c b/drivers/spi/spi-dw.c
index c1abc06..79c958e 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -457,19 +457,7 @@
}
if (transfer->bits_per_word) {
bits = transfer->bits_per_word;
-
- switch (bits) {
- case 8:
- case 16:
- dws->n_bytes = dws->dma_width = bits >> 3;
- break;
- default:
- printk(KERN_ERR "MRST SPI0: unsupported bits:"
- "%db\n", bits);
- message->status = -EIO;
- goto early_exit;
- }
-
+ dws->n_bytes = dws->dma_width = bits >> 3;
cr0 = (bits - 1)
| (chip->type << SPI_FRF_OFFSET)
| (spi->mode << SPI_MODE_OFFSET)
@@ -629,9 +617,6 @@
struct dw_spi_chip *chip_info = NULL;
struct chip_data *chip;
- if (spi->bits_per_word != 8 && spi->bits_per_word != 16)
- return -EINVAL;
-
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (!chip) {
@@ -660,16 +645,12 @@
chip->enable_dma = chip_info->enable_dma;
}
- if (spi->bits_per_word <= 8) {
+ if (spi->bits_per_word == 8) {
chip->n_bytes = 1;
chip->dma_width = 1;
- } else if (spi->bits_per_word <= 16) {
+ } else if (spi->bits_per_word == 16) {
chip->n_bytes = 2;
chip->dma_width = 2;
- } else {
- /* Never take >16b case for MRST SPIC */
- dev_err(&spi->dev, "invalid wordsize\n");
- return -EINVAL;
}
chip->bits_per_word = spi->bits_per_word;
@@ -824,6 +805,7 @@
}
master->mode_bits = SPI_CPOL | SPI_CPHA;
+ master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(16);
master->bus_num = dws->bus_num;
master->num_chipselect = dws->num_cs;
master->cleanup = dw_spi_cleanup;