Hi Jonathan and all, I have 4 channels on my Analog to digital converter. I like to enable all the 4 channels with the following set of commands Setting up channels in use # echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage0_en # echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage1_en # echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage2_en # echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage3_en Setting up the trigger # echo "my_periodic_timer_trigger" > /sys/bus/iio/devices/iio:device0/trigger/current_trigger Setting up buffer length # echo 100 > /sys/bus/iio/devices/iio:device0/buffer/length Enable the buffer # echo 1 > /sys/bus/iio/devices/iio:device0/buffer/enable Now in my IIO ADC driver data is available at unequal intervals meaning that ... (assuming that my ADC trigger handler is called once in every 1 milli second) 1. After 1 milli seconds data is available on channel1 only ... 2. After 2 millli seconds new data is available on channel0 and channel2 3. After 3 milli seconds new data is available on channel0, channel2 and channel3 4. After 4 milli seconds new data is available on channel 2 and channel channel3 5. After 5 milli seconds new data is available on channel0. channel1, chanel2, channel3 and it goes on like this ..... and my IIO ADC driver knows that on which channels data is available at any given point of time .... The idea is to push data to IIO buffer as and when data is available on one or more channels. But, I understand that, the following function expects that data (second argument to the function) be available on all the 4 enabled channels before the function is called. static inline int iio_push_to_buffers_with_timestamp(struct iio_dev *indio_dev, void *data, int64_t timestamp) Assuming that all the 4 channels are enabled from the user space for buffered capture: 1. I understand that IIO supports pushing data to buffer if data is available on all the enabled channels. 2. Please let me know if it is possible for me to push data to buffer from my IIO ADC driver whenever data is available on any of the channels. Thanks and regards, Sricharan. -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
