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ee2ac1cdd3
linux/drivers/iio
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Fabrice Gasnier ee2ac1cdd3 iio: adc: stm32: add optional st,min-sample-time-nsecs 
STM32 ADC allows each channel to be sampled with a different sampling time,
by setting SMPR registers. Basically, value depends on local electrical
properties. Selecting correct value for sampling time highly depends on
analog source impedance. There is a manual that may help in this process:
'How to get the best ADC accuracy in STM32...'

This patch allows to configure minimum sampling time via device tree,
either for:
- all channels at once:
  st,min-sample-time-nsecs = <10000>;

- independently for each channel (must match "st,adc-channels" list):
  st,adc-channels = <0 1>;
  st,min-sample-time-nsecs = <5000 10000>;

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2017-08-09 14:14:10 +01:00
..
accel iio: accel: st_accel: rename H3LIS331DL_DRIVER_NAME in H3LIS331DL_ACCEL_DEV_NAME 2017-07-09 19:19:17 +01:00
adc iio: adc: stm32: add optional st,min-sample-time-nsecs 2017-08-09 14:14:10 +01:00
amplifiers
buffer iio: buffer-dmaengine: Add missing header buffer_impl.h 2017-06-13 20:56:05 +01:00
chemical iio: chemical: ccs811: Add support for AMS CCS811 VOC sensor 2017-07-22 21:16:37 +01:00
common iio: common: st_sensors: move st_sensors_of_i2c_probe() in common code 2017-07-01 10:16:56 +01:00
counter iio: pc104: Mask PC/104 drivers via the PC104 Kconfig option 2017-03-15 21:59:08 +00:00
dac iio: dac: stm32: add support for stm32f4 2017-07-15 12:26:26 +01:00
dummy iio:dummy: Stop enabling timestamp by default. 2017-01-10 19:54:55 +00:00
frequency iio: frequency: ad9523: use unsigned int rather then bare unsigned 2016-04-17 10:31:03 +01:00
gyro iio: gyro: st_gyro_spi: add OF capability to st_gyro_spi 2017-07-02 10:24:56 +01:00
health First set of IIO new device support, features and cleanup for the 4.12 cycle. 2017-03-06 13:17:21 +01:00
humidity iio: humidity: hts221: move drdy enable logic in hts221_trig_set_state() 2017-07-25 20:03:04 +01:00
imu iio: adis16400: Change unsigned to unsigned int 2017-07-02 10:27:03 +01:00
light iio: light: rpr0521 triggered buffer 2017-07-04 20:46:28 +01:00
magnetometer iio: magnetometer: st_magn_spi: add OF capability to st_magn_spi 2017-07-02 10:24:55 +01:00
multiplexer iio: multiplexer: new iio category and iio-mux driver 2017-06-03 19:29:26 +09:00
orientation iio: orientation: hid-sensor-rotation: Drop unnecessary static 2017-07-17 21:45:01 +01:00
potentiometer iio: max5481: Add support for Maxim digital potentiometers 2017-01-28 12:13:31 +00:00
potentiostat iio: lmp91000: Set parent device 2017-02-19 12:01:52 +00:00
pressure iio: pressure: zpa2326: Add newlines to logging macros 2017-07-06 19:28:28 +01:00
proximity Second set of IIO new device support, features and cleanups for the 4.13 cycle. 2017-06-26 07:09:23 +02:00
temperature iio: temperature: tsys01: Add OF match table 2017-07-01 10:16:42 +01:00
trigger iio: make stm32 trigger driver use INDIO_HARDWARE_TRIGGERED mode 2017-06-11 15:59:05 +01:00
iio_core_trigger.h
iio_core.h iio:core: timestamping clock selection support 2016-06-30 19:41:38 +01:00
industrialio-buffer.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
industrialio-configfs.c
industrialio-core.c iio: add hardware triggered operating mode 2017-06-11 15:58:41 +01:00
industrialio-event.c iio: iio_push_event(): Don't crash if the event interface is not registered 2016-09-10 16:40:44 +01:00
industrialio-sw-device.c iio: Add support for creating IIO devices via configfs 2016-05-04 11:43:54 +01:00
industrialio-sw-trigger.c
industrialio-trigger.c iio: trigger: fix NULL pointer dereference in iio_trigger_write_current() 2017-05-21 12:36:59 +01:00
industrialio-triggered-event.c
inkern.c First round of IIO new device support, features and cleanups for the 4.14 cycle. 2017-07-27 21:29:49 -07:00
Kconfig iio: multiplexer: new iio category and iio-mux driver 2017-06-03 19:29:26 +09:00
Makefile iio: multiplexer: new iio category and iio-mux driver 2017-06-03 19:29:26 +09:00