Lars-Peter Clausen 50892cb292 iio: ad_sigma_delta: Properly handle SPI bus locking vs CS assertion ... [ Upstream commit df1d80aee9 ] For devices from the SigmaDelta family we need to keep CS low when doing a conversion, since the device will use the MISO line as a interrupt to indicate that the conversion is complete. This is why the driver locks the SPI bus and when the SPI bus is locked keeps as long as a conversion is going on. The current implementation gets one small detail wrong though. CS is only de-asserted after the SPI bus is unlocked. This means it is possible for a different SPI device on the same bus to send a message which would be wrongfully be addressed to the SigmaDelta device as well. Make sure that the last SPI transfer that is done while holding the SPI bus lock de-asserts the CS signal. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Alexandru Ardelean <Alexandru.Ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-05-31 06:47:29 -07:00
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accel	…
adc	iio: ad_sigma_delta: Properly handle SPI bus locking vs CS assertion	2019-05-31 06:47:29 -07:00
common	iio: st_sensors: add register mask for status register	2017-12-25 14:26:26 +01:00
dac	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
frequency	…
gyro	…
imu	…
magnetometer	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
timer	iio: stm32: fix adc/trigger link error	2017-12-14 09:52:48 +01:00
buffer-dma.h	iio: buffer: fix the function signature to match implementation	2018-11-04 14:52:45 +01:00
buffer-dmaengine.h	…
buffer.h	…
buffer_impl.h	iio:buffer: make length types match kfifo types	2018-06-05 11:41:58 +02:00
configfs.h	…
consumer.h	iio: inkern: api for manipulating ext_info of iio channels	2017-06-03 19:29:26 +09:00
driver.h	…
events.h	…
iio.h	PATCH] iio: Fix some documentation warnings	2017-08-20 15:21:46 +01:00
kfifo_buf.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
machine.h	…
sw_device.h	iio: sw-device: Fix config group initialization	2017-03-13 20:42:34 +00:00
sw_trigger.h	…
sysfs.h	…
trigger.h	PATCH] iio: Fix some documentation warnings	2017-08-20 15:21:46 +01:00
trigger_consumer.h	…
triggered_buffer.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
triggered_event.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
types.h	…