iio/adc/ep93xx_adc.c

7  * The driver uses polling to get the conversion status. According to EP93xx
8  * datasheets, reading ADCResult register starts the conversion, but user is also
9  * responsible for ensuring that delay between adjacent conversion triggers is
10  * long enough so that maximum allowed conversion rate is not exceeded. This
28  * lower ADC conversion rate down to CONFIG_HZ, so we fallback to busy wait
32  * conversion, while busy wait-based version consumes whole CPU power.
107 		/* Start the conversion, eventually discarding old result */  in ep93xx_read_raw()
109 		/* Ensure maximum conversion rate is not exceeded */  in ep93xx_read_raw()
112 		/* At this point conversion must be completed, but anyway... */  in ep93xx_read_raw()
125 				dev_err(&iiodev->dev, "Conversion timeout\n");  in ep93xx_read_raw()
194 		 * resulting in conversion rates 3750 and 925 samples per second  in ep93xx_adc_probe()