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spi: omap2-mcspi: Do not configure the controller on each transfer unless needed

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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>
This commit is contained in:
Stefan Sørensen 2014-02-02 16:24:12 +01:00 committed by Mark Brown
parent 38dbfb59d1
commit 2bd16e3e23
1 changed files with 5 additions and 2 deletions
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7
drivers/spi/spi-omap2-mcspi.c
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@ -1057,12 +1057,15 @@ static void omap2_mcspi_work(struct omap2_mcspi *mcspi, struct spi_message *m)
status = -EINVAL; status = -EINVAL;
break; break;
} }
if (par_override || t->speed_hz || t->bits_per_word) { if (par_override ||
(t->speed_hz != spi->max_speed_hz) ||
(t->bits_per_word != spi->bits_per_word)) {
par_override = 1; par_override = 1;
status = omap2_mcspi_setup_transfer(spi, t); status = omap2_mcspi_setup_transfer(spi, t);
if (status < 0) if (status < 0)
break; break;
if (!t->speed_hz && !t->bits_per_word) if (t->speed_hz == spi->max_speed_hz &&
t->bits_per_word == spi->bits_per_word)
par_override = 0; par_override = 0;
} }
if (cd && cd->cs_per_word) { if (cd && cd->cs_per_word) {