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spi: sun4i: Set bits_per_word_mask to only support 8 bits word length 

This controller only supports 8 bits word length.
Set bits_per_word_mask so spi core will reject transfers that attempt to use
an unsupported bits_per_word value.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2014-03-02 22:25:10 +08:00 committed by Mark Brown
parent b5f6517948
commit ba47644d5b
1 changed files with 1 additions and 0 deletions
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drivers/spi/spi-sun4i.c
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@ -392,6 +392,7 @@ static int sun4i_spi_probe(struct platform_device *pdev)
master->transfer_one = sun4i_spi_transfer_one;
master->num_chipselect = 4;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
master->bits_per_word_mask = SPI_BPW_MASK(8);
master->dev.of_node = pdev->dev.of_node;
master->auto_runtime_pm = true;