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spi: omap2-mcspi: Do not configure the controller on each transfer unless needed
spi_transfer->speed_hz and spi_transfer->bits_per_word used to only be set when not using the default settings but are not set on every transfer, causing omap2_mcspi_setup_transfer to be called on each transfer. This patch changes the check to only call omap2_mcspi_setup_transfer if the settings needs to be changed. Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com> Signed-off-by: Mark Brown <broonie@linaro.org>
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1 changed files with 5 additions and 2 deletions
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@ -1057,12 +1057,15 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
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status = -EINVAL;
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break;
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}
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if (par_override || t->speed_hz || t->bits_per_word) {
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if (par_override ||
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(t->speed_hz != spi->max_speed_hz) ||
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(t->bits_per_word != spi->bits_per_word)) {
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par_override = 1;
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status = omap2_mcspi_setup_transfer(spi, t);
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if (status < 0)
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break;
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if (!t->speed_hz && !t->bits_per_word)
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if (t->speed_hz == spi->max_speed_hz &&
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t->bits_per_word == spi->bits_per_word)
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par_override = 0;
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}
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if (cd && cd->cs_per_word) {
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