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Commit f073d37d authored by Axel Lin's avatar Axel Lin Committed by Mark Brown
Browse files

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: default avatarAxel Lin <axel.lin@ingics.com>
Acked-by: default avatarThomas Chou <thomas@wytron.com.tw>
Signed-off-by: default avatarMark 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) {