adc: add ioctl command to get the number of configured channels #4231
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Number of configured ADC channels is currently only defined in board level section, typically in xxx_adc.c file. This commit introduces ioctl command ANIOC_GET_NCHANNELS that returns the number of configured channels which is determined by the driver code. The change can allow the applications to be more flexible when it comes to multiple ADC devices with different number of configured channels. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
xiaoxiang781216
approved these changes
Jul 27, 2021
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Summary
Number of configured ADC channels is currently only defined in board
level section, typically in xxx_adc.c file. This commit introduces
ioctl command ANIOC_GET_NCHANNELS that returns the number of configured
channels which is determined by the driver code. The change can allow the
applications to be more flexible when it comes to multiple ADC devices
with different number of configured channels.
The problem was already mentioned in an issue #4217.
Impact
None on current functionality, just adds additional option to get the number of channels to all current ADC drivers.
Testing
Tested with pysimCoder application on iMXRT and STM32 boards.