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spi/bfin_spi: fix handling of default bits per word setting 

The default bits per word setting should be 8 bits, but since most of our
devices have been explicitly setting this up, we didn't notice when the
default stopped working.

At the moment, any default transfers without an explicit bit size setting
error out with:
bfin-spi bfin-spi.0: transfer: unsupported bits_per_word

So in the transfer logic, have a bits_per_word setting of 0 fall into the
8 bit transfer logic.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Mike Frysinger 2011-06-17 04:35:37 -04:00 committed by Grant Likely
parent 2c53b436a3
commit e479c60456
1 changed files with 4 additions and 3 deletions
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7
drivers/spi/spi_bfin5xx.c
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@ -681,13 +681,14 @@ static void bfin_spi_pump_transfers(unsigned long data)
drv_data->cs_change = transfer->cs_change;
/* Bits per word setup */
bits_per_word = transfer->bits_per_word ? : message->spi->bits_per_word;
if ((bits_per_word > 0) && (bits_per_word % 16 == 0)) {
bits_per_word = transfer->bits_per_word ? :
message->spi->bits_per_word ? : 8;
if (bits_per_word % 16 == 0) {
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 > 0) && (bits_per_word % 8 == 0)) {
} else if (bits_per_word % 8 == 0) {
drv_data->n_bytes = bits_per_word/8;
drv_data->len = transfer->len;
cr_width = 0;