iio: adis16460: 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/20210903141423.517028-5-nuno.sa@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis16460.c

@@ -319,20 +319,6 @@ static const struct iio_info adis16460_info = {
 	.debugfs_reg_access = adis_debugfs_reg_access,
 };
 
-static int adis16460_enable_irq(struct adis *adis, bool enable)
-{
-	/*
-	 * There is no way to gate the data-ready signal internally inside the
-	 * ADIS16460 :(
-	 */
-	if (enable)
-		enable_irq(adis->spi->irq);
-	else
-		disable_irq(adis->spi->irq);
-
-	return 0;
-}
-
 #define ADIS16460_DIAG_STAT_IN_CLK_OOS	7
 #define ADIS16460_DIAG_STAT_FLASH_MEM	6
 #define ADIS16460_DIAG_STAT_SELF_TEST	5
@@ -373,7 +359,7 @@ static const struct adis_data adis16460_data = {
 		BIT(ADIS16460_DIAG_STAT_OVERRANGE) |
 		BIT(ADIS16460_DIAG_STAT_SPI_COMM) |
 		BIT(ADIS16460_DIAG_STAT_FLASH_UPT),
-	.enable_irq = adis16460_enable_irq,
+	.unmasked_drdy = true,
 	.timeouts = &adis16460_timeouts,
 };
 
@@ -400,8 +386,6 @@ static int adis16460_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	/* We cannot mask the interrupt, so ensure it isn't auto enabled */
-	st->adis.irq_flag |= IRQF_NO_AUTOEN;
 	ret = devm_adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL);
 	if (ret)
 		return ret;