The patch spi: bitbang: Don't call chipselect() in spi_bitbang_setup()
has been applied to the spi tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From a666f2619a97ab9264d3b06055a336b3ee75c108 Mon Sep 17 00:00:00 2001 From: Alban Bedel <al...@free.fr> Date: Wed, 16 Jan 2019 19:55:44 +0100 Subject: [PATCH] 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 <al...@free.fr> Signed-off-by: Mark Brown <broo...@kernel.org> --- drivers/spi/spi-bitbang.c | 13 ------------- 1 file changed, 13 deletions(-) diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c index f29176000b8d..dd9a8c54a693 100644 --- a/drivers/spi/spi-bitbang.c +++ b/drivers/spi/spi-bitbang.c @@ -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); -- 2.20.1
