dt-bindings: iio: adc: stm32: add optional st,min-sample-time-nsecs
STM32 ADC allows each channel to be sampled with a different sampling time. There's an application note that deals with this: 'How to get the best ADC accuracy in STM32...' It basically depends on analog input signal electrical properties (depends on board). Add optional 'st,min-sample-time-nsecs' property so this can be tuned in dt. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
parent
0d0d4d21a0
commit
bc8e1f5b21
|
@ -74,6 +74,11 @@ Optional properties:
|
|||
* can be 6, 8, 10 or 12 on stm32f4
|
||||
* can be 8, 10, 12, 14 or 16 on stm32h7
|
||||
Default is maximum resolution if unset.
|
||||
- st,min-sample-time-nsecs: Minimum sampling time in nanoseconds.
|
||||
Depending on hardware (board) e.g. high/low analog input source impedance,
|
||||
fine tune of ADC sampling time may be recommended.
|
||||
This can be either one value or an array that matches 'st,adc-channels' list,
|
||||
to set sample time resp. for all channels, or independently for each channel.
|
||||
|
||||
Example:
|
||||
adc: adc@40012000 {
|
||||
|
|
Loading…
Reference in a new issue