iio: adis16475: make use of the new unmasked_drdy flag

The library can now handle enabling/disabling IRQs for devices that
cannot unmask the data ready pin. Hence there's no need to provide an
'enable_irq' callback anymore.

The library will also automatically request the IRQ with 'IRQF_NO_AUTOEN'
so that we can also remove that from the driver.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20210903141423.517028-4-nuno.sa@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis16475.c

@@ -606,20 +606,6 @@ static const char * const adis16475_status_error_msgs[] = {
 	[ADIS16475_DIAG_STAT_CLK] = "Clock error",
 };
 
-static int adis16475_enable_irq(struct adis *adis, bool enable)
-{
-	/*
-	 * There is no way to gate the data-ready signal internally inside the
-	 * ADIS16475. We can only control it's polarity...
-	 */
-	if (enable)
-		enable_irq(adis->spi->irq);
-	else
-		disable_irq(adis->spi->irq);
-
-	return 0;
-}
-
 #define ADIS16475_DATA(_prod_id, _timeouts)				\
 {									\
 	.msc_ctrl_reg = ADIS16475_REG_MSG_CTRL,				\
@@ -640,7 +626,7 @@ static int adis16475_enable_irq(struct adis *adis, bool enable)
 		BIT(ADIS16475_DIAG_STAT_SENSOR) |			\
 		BIT(ADIS16475_DIAG_STAT_MEMORY) |			\
 		BIT(ADIS16475_DIAG_STAT_CLK),				\
-	.enable_irq = adis16475_enable_irq,				\
+	.unmasked_drdy = true,						\
 	.timeouts = (_timeouts),					\
 	.burst_reg_cmd = ADIS16475_REG_GLOB_CMD,			\
 	.burst_len = ADIS16475_BURST_MAX_DATA,				\
@@ -1254,9 +1240,6 @@ static int adis16475_config_irq_pin(struct adis16475 *st)
 		return -EINVAL;
 	}
 
-	/* We cannot mask the interrupt so ensure it's not enabled at request */
-	st->adis.irq_flag |= IRQF_NO_AUTOEN;
-
 	val = ADIS16475_MSG_CTRL_DR_POL(polarity);
 	ret = __adis_update_bits(&st->adis, ADIS16475_REG_MSG_CTRL,
 				 ADIS16475_MSG_CTRL_DR_POL_MASK, val);