3  * Murata ZPA2326 pressure and temperature sensor IIO driver
21  * performs pressure and temperature measurements, then automatically switches
31  * pressure samples only). Measurement cycle completion may be signaled by a
36  * - at end of period, upon data ready interrupt: pop pressure samples out of
49  *   preset pressure threshold crossing / IIO events ;
50  *   differential pressure sampling ;
470 		 * A single fetch from pressure MSB register is enough to pop  in zpa2326_clear_fifo()
503  * zpa2326_dequeue_pressure() - Retrieve the most recent pressure sample from
506  * @pressure:  Sampled pressure output.
508  * Note that ZPA2326 hardware FIFO stores pressure samples only.
513 				    u32                  *pressure)  in zpa2326_dequeue_pressure()  argument
525 	*pressure = 0;  in zpa2326_dequeue_pressure()
534 		err = regmap_bulk_read(regs, ZPA2326_PRESS_OUT_XL_REG, pressure,  in zpa2326_dequeue_pressure()
540 		/* Hardware FIFO may hold no more than 16 pressure samples. */  in zpa2326_dequeue_pressure()
546 	 * values out until FIFO is empty : last fetched pressure is the newest.  in zpa2326_dequeue_pressure()
550 		err = regmap_bulk_read(regs, ZPA2326_PRESS_OUT_XL_REG, pressure,  in zpa2326_dequeue_pressure()
583 		u32 pressure;  in zpa2326_fill_sample_buffer()  member
590 		/* Get current pressure from hardware FIFO. */  in zpa2326_fill_sample_buffer()
591 		err = zpa2326_dequeue_pressure(indio_dev, &sample.pressure);  in zpa2326_fill_sample_buffer()
593 			zpa2326_warn(indio_dev, "failed to fetch pressure (%d)",  in zpa2326_fill_sample_buffer()
973 	 * In oneshot mode, pressure sample availability guarantees that  in zpa2326_poll_oneshot_completion()
974 	 * temperature conversion has also completed : just check pressure  in zpa2326_poll_oneshot_completion()
1015 		zpa2326_dbg(indio_dev, "fetching raw pressure sample");  in zpa2326_fetch_raw_sample()
1019 			zpa2326_warn(indio_dev, "failed to fetch pressure (%d)",  in zpa2326_fetch_raw_sample()
1078 		 * pressure samples. The latter are always enqueued into  in zpa2326_sample_oneshot()
1079 		 * hardware FIFO. This may lead to situations were pressure  in zpa2326_sample_oneshot()
1486 			 * Pressure resolution is 1/64 Pascal. Scale to kPascal  in zpa2326_read_raw()
1715 MODULE_DESCRIPTION("Core driver for Murata ZPA2326 pressure sensor");