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| author | Axel Lin <axel.lin@ingics.com> | 2013-08-29 23:41:20 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-31 14:10:41 +0100 |
| commit | f073d37de0468d517b1fb682b5bea5bfa9ce55c9 (patch) | |
| tree | b92e9fc29c88e73bf3fc6ac2f9c8ffb21539c830 | |
| parent | b3136f8f7c49bb4ca71247046f688fdffa104310 (diff) | |
| download | op-kernel-dev-f073d37de0468d517b1fb682b5bea5bfa9ce55c9.zip op-kernel-dev-f073d37de0468d517b1fb682b5bea5bfa9ce55c9.tar.gz | |
spi: altera: Use DIV_ROUND_UP to calculate hw->bytes_per_word
The Altera SPI hardware can be configured to support data width from 1 to 32
since Quartus II 8.1. To avoid truncation by integer division, use DIV_ROUND_UP
to calculate hw->bytes_per_word.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | drivers/spi/spi-altera.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c index dce4a7e..523f2f6 100644 --- a/drivers/spi/spi-altera.c +++ b/drivers/spi/spi-altera.c @@ -134,7 +134,7 @@ static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t) hw->tx = t->tx_buf; hw->rx = t->rx_buf; hw->count = 0; - hw->bytes_per_word = t->bits_per_word / 8; + hw->bytes_per_word = DIV_ROUND_UP(t->bits_per_word, 8); hw->len = t->len / hw->bytes_per_word; if (hw->irq >= 0) { |
