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spi: bitbang: Don't call chipselect() in spi_bitbang_setup() 

spi_setup() already call spi_set_cs() right after calling the
controller setup method, so there is no need for the bitbang driver to
do that. Because of this the chipselect() callback was confusingly
still called when CS is GPIO based.

Signed-off-by: Alban Bedel <albeu@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Alban Bedel 2019-01-16 19:55:44 +01:00 committed by Mark Brown
parent 734882a8bf
commit a666f2619a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 0 additions and 13 deletions
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drivers/spi/spi-bitbang.c
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@ -213,19 +213,6 @@ int spi_bitbang_setup(struct spi_device *spi)
dev_dbg(&spi->dev, "%s, %u nsec/bit\n", __func__, 2 * cs->nsecs);
/* NOTE we _need_ to call chipselect() early, ideally with adapter
* setup, unless the hardware defaults cooperate to avoid confusion
* between normal (active low) and inverted chipselects.
*/
/* deselect chip (low or high) */
mutex_lock(&bitbang->lock);
if (!bitbang->busy) {
bitbang->chipselect(spi, BITBANG_CS_INACTIVE);
ndelay(cs->nsecs);
}
mutex_unlock(&bitbang->lock);
return 0;
}
EXPORT_SYMBOL_GPL(spi_bitbang_setup);