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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-12-05 10:13:40 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-12-09 19:46:34 +0100 |
| commit | 4a07b8bcd503c842bcf0171cdbccdfdac3d985c3 (patch) | |
| tree | aaa3ab1ae1173dfd6384024cda28fed155b0db5a /drivers/spi/spi-dw.c | |
| parent | spi: stm32: Switch to use GPIO descriptors for CS (diff) | |
| download | linux-4a07b8bcd503c842bcf0171cdbccdfdac3d985c3.tar.xz linux-4a07b8bcd503c842bcf0171cdbccdfdac3d985c3.zip | |
spi: bitbang: Make chipselect callback optional
The ->chipselect() callback on the bit-banged SPI library
master is optional if using GPIO descriptors: when using
descriptors exclusively without any native chipselects,
the core does not even call out the the native ->set_cs()
and therefore ->chipselect() on a bit-banged SPI master
will not even be called in this case.
Make sure to respect the SPI_MASTER_GPIO_SS as used by
e.g. spi-gpio.c though: this setting will make the core
handle the chip select using GPIO descriptors *AND* call
the local chipselect handler.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191205091340.59850-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw.c')
0 files changed, 0 insertions, 0 deletions