iio: adc: ti-ads1015: Add edge trigger support

The comparator generates an edge on the IRQ like and stays in the
configured state until cleared. Support edge triggered IRQs as well
as not all controllers do support level triggered IRQ.
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://lore.kernel.org/r/20230831182502.154899-1-marex@denx.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ti-ads1015.c

@@ -1047,11 +1047,13 @@ static int ads1015_probe(struct i2c_client *client)
 			1 << ADS1015_CFG_COMP_LAT_SHIFT;
 
 		switch (irq_trig) {
+		case IRQF_TRIGGER_FALLING:
 		case IRQF_TRIGGER_LOW:
 			cfg_comp |= ADS1015_CFG_COMP_POL_LOW <<
 					ADS1015_CFG_COMP_POL_SHIFT;
 			break;
 		case IRQF_TRIGGER_HIGH:
+		case IRQF_TRIGGER_RISING:
 			cfg_comp |= ADS1015_CFG_COMP_POL_HIGH <<
 					ADS1015_CFG_COMP_POL_SHIFT;
 			break;