v4.19.13 snapshot.
diff --git a/include/linux/iio/trigger_consumer.h b/include/linux/iio/trigger_consumer.h
new file mode 100644
index 0000000..c4f8c74
--- /dev/null
+++ b/include/linux/iio/trigger_consumer.h
@@ -0,0 +1,63 @@
+/* The industrial I/O core, trigger consumer functions
+ *
+ * Copyright (c) 2008-2011 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef __LINUX_IIO_TRIGGER_CONSUMER_H__
+#define __LINUX_IIO_TRIGGER_CONSUMER_H__
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+
+struct iio_dev;
+struct iio_trigger;
+
+/**
+ * struct iio_poll_func - poll function pair
+ *
+ * @indio_dev: data specific to device (passed into poll func)
+ * @h: the function that is actually run on trigger
+ * @thread: threaded interrupt part
+ * @type: the type of interrupt (basically if oneshot)
+ * @name: name used to identify the trigger consumer.
+ * @irq: the corresponding irq as allocated from the
+ * trigger pool
+ * @timestamp: some devices need a timestamp grabbed as soon
+ * as possible after the trigger - hence handler
+ * passes it via here.
+ **/
+struct iio_poll_func {
+ struct iio_dev *indio_dev;
+ irqreturn_t (*h)(int irq, void *p);
+ irqreturn_t (*thread)(int irq, void *p);
+ int type;
+ char *name;
+ int irq;
+ s64 timestamp;
+};
+
+
+struct iio_poll_func
+*iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
+ irqreturn_t (*thread)(int irq, void *p),
+ int type,
+ struct iio_dev *indio_dev,
+ const char *fmt,
+ ...);
+void iio_dealloc_pollfunc(struct iio_poll_func *pf);
+irqreturn_t iio_pollfunc_store_time(int irq, void *p);
+
+void iio_trigger_notify_done(struct iio_trigger *trig);
+
+/*
+ * Two functions for common case where all that happens is a pollfunc
+ * is attached and detached from a trigger
+ */
+int iio_triggered_buffer_postenable(struct iio_dev *indio_dev);
+int iio_triggered_buffer_predisable(struct iio_dev *indio_dev);
+
+#endif