1 files changed, 89 insertions, 0 deletions

diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
new file mode 100644
index 000000000000..5a24c9cac343
--- /dev/null
+++ b/drivers/iio/imu/adis_trigger.c
@@ -0,0 +1,89 @@
+/*
+ * Common library for ADIS16XXX devices
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *   Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/export.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/imu/adis.h>
+
+static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig,
+                                                bool state)
+{
+        struct adis *adis = trig->private_data;
+
+        return adis_enable_irq(adis, state);
+}
+
+static const struct iio_trigger_ops adis_trigger_ops = {
+        .owner = THIS_MODULE,
+        .set_trigger_state = &adis_data_rdy_trigger_set_state,
+};
+
+/**
+ * adis_probe_trigger() - Sets up trigger for a adis device
+ * @adis: The adis device
+ * @indio_dev: The IIO device
+ *
+ * Returns 0 on success or a negative error code
+ *
+ * adis_remove_trigger() should be used to free the trigger.
+ */
+int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
+{
+        int ret;
+
+        adis->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
+                                        indio_dev->id);
+        if (adis->trig == NULL)
+                return -ENOMEM;
+
+        ret = request_irq(adis->spi->irq,
+                          &iio_trigger_generic_data_rdy_poll,
+                          IRQF_TRIGGER_RISING,
+                          indio_dev->name,
+                          adis->trig);
+        if (ret)
+                goto error_free_trig;
+
+        adis->trig->dev.parent = &adis->spi->dev;
+        adis->trig->ops = &adis_trigger_ops;
+        adis->trig->private_data = adis;
+        ret = iio_trigger_register(adis->trig);
+
+        indio_dev->trig = adis->trig;
+        if (ret)
+                goto error_free_irq;
+
+        return 0;
+
+error_free_irq:
+        free_irq(adis->spi->irq, adis->trig);
+error_free_trig:
+        iio_trigger_free(adis->trig);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(adis_probe_trigger);
+
+/**
+ * adis_remove_trigger() - Remove trigger for a adis devices
+ * @adis: The adis device
+ *
+ * Removes the trigger previously registered with adis_probe_trigger().
+ */
+void adis_remove_trigger(struct adis *adis)
+{
+        iio_trigger_unregister(adis->trig);
+        free_irq(adis->spi->irq, adis->trig);
+        iio_trigger_free(adis->trig);
+}
+EXPORT_SYMBOL_GPL(adis_remove_trigger);