Commit f073d37d authored Aug 29, 2013 by Axel Lin Committed by Mark Brown Aug 31, 2013

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>

parent b3136f8f

drivers/spi/spi-altera.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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) {

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