iio: adc: max1027: Make it optional to use interrupts

[linux.git] / drivers / iio / adc / max1027.c

diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 6cdfe9ef73fc49a325dffa1b0602885798c9bfb6..823223b77a7043f113b7ed45fa34bf92a7a0dac1 100644 (file)
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -430,35 +430,40 @@ static int max1027_probe(struct spi_device *spi)
                return -ENOMEM;
        }
 
-       ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
-                                       &iio_pollfunc_store_time,
-                                       &max1027_trigger_handler, NULL);
-       if (ret < 0) {
-               dev_err(&indio_dev->dev, "Failed to setup buffer\n");
-               return ret;
-       }
-
-       st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-trigger",
-                                                       indio_dev->name);
-       if (st->trig == NULL) {
-               ret = -ENOMEM;
-               dev_err(&indio_dev->dev, "Failed to allocate iio trigger\n");
-               return ret;
-       }
+       if (spi->irq) {
+               ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+                                                     &iio_pollfunc_store_time,
+                                                     &max1027_trigger_handler,
+                                                     NULL);
+               if (ret < 0) {
+                       dev_err(&indio_dev->dev, "Failed to setup buffer\n");
+                       return ret;
+               }
 
-       st->trig->ops = &max1027_trigger_ops;
-       st->trig->dev.parent = &spi->dev;
-       iio_trigger_set_drvdata(st->trig, indio_dev);
-       iio_trigger_register(st->trig);
+               st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-trigger",
+                                                 indio_dev->name);
+               if (st->trig == NULL) {
+                       ret = -ENOMEM;
+                       dev_err(&indio_dev->dev,
+                               "Failed to allocate iio trigger\n");
+                       return ret;
+               }
 
-       ret = devm_request_threaded_irq(&spi->dev, spi->irq,
-                                       iio_trigger_generic_data_rdy_poll,
-                                       NULL,
-                                       IRQF_TRIGGER_FALLING,
-                                       spi->dev.driver->name, st->trig);
-       if (ret < 0) {
-               dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
-               return ret;
+               st->trig->ops = &max1027_trigger_ops;
+               st->trig->dev.parent = &spi->dev;
+               iio_trigger_set_drvdata(st->trig, indio_dev);
+               iio_trigger_register(st->trig);
+
+               ret = devm_request_threaded_irq(&spi->dev, spi->irq,
+                                               iio_trigger_generic_data_rdy_poll,
+                                               NULL,
+                                               IRQF_TRIGGER_FALLING,
+                                               spi->dev.driver->name,
+                                               st->trig);
+               if (ret < 0) {
+                       dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
+                       return ret;
+               }
        }
 
        /* Disable averaging */