1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/staging/iio/trigger/iio-trig-sysfs.c b/drivers/staging/iio/trigger/iio-trig-sysfs.c
new file mode 100644
index 0000000..127a2a3
--- /dev/null
+++ b/drivers/staging/iio/trigger/iio-trig-sysfs.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "../iio.h"
+#include "../trigger.h"
+
+static ssize_t iio_sysfs_trigger_poll(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct iio_trigger *trig = dev_get_drvdata(dev);
+	iio_trigger_poll(trig, 0);
+
+	return count;
+}
+
+static DEVICE_ATTR(trigger_now, S_IWUSR, NULL, iio_sysfs_trigger_poll);
+static IIO_TRIGGER_NAME_ATTR;
+
+static struct attribute *iio_sysfs_trigger_attrs[] = {
+	&dev_attr_trigger_now.attr,
+	&dev_attr_name.attr,
+	NULL,
+};
+
+static const struct attribute_group iio_sysfs_trigger_attr_group = {
+	.attrs = iio_sysfs_trigger_attrs,
+};
+
+static int __devinit iio_sysfs_trigger_probe(struct platform_device *pdev)
+{
+	struct iio_trigger *trig;
+	int ret;
+
+	trig = iio_allocate_trigger();
+	if (!trig) {
+		ret = -ENOMEM;
+		goto out1;
+	}
+
+	trig->control_attrs = &iio_sysfs_trigger_attr_group;
+	trig->owner = THIS_MODULE;
+	trig->name = kasprintf(GFP_KERNEL, "sysfstrig%d", pdev->id);
+	if (trig->name == NULL) {
+		ret = -ENOMEM;
+		goto out2;
+	}
+
+	ret = iio_trigger_register(trig);
+	if (ret)
+		goto out3;
+
+	platform_set_drvdata(pdev, trig);
+
+	return 0;
+out3:
+	kfree(trig->name);
+out2:
+	iio_put_trigger(trig);
+out1:
+
+	return ret;
+}
+
+static int __devexit iio_sysfs_trigger_remove(struct platform_device *pdev)
+{
+	struct iio_trigger *trig = platform_get_drvdata(pdev);
+
+	iio_trigger_unregister(trig);
+	kfree(trig->name);
+	iio_put_trigger(trig);
+
+	return 0;
+}
+
+static struct platform_driver iio_sysfs_trigger_driver = {
+	.driver = {
+		.name = "iio_sysfs_trigger",
+		.owner = THIS_MODULE,
+	},
+	.probe = iio_sysfs_trigger_probe,
+	.remove = __devexit_p(iio_sysfs_trigger_remove),
+};
+
+static int __init iio_sysfs_trig_init(void)
+{
+	return platform_driver_register(&iio_sysfs_trigger_driver);
+}
+module_init(iio_sysfs_trig_init);
+
+static void __exit iio_sysfs_trig_exit(void)
+{
+	platform_driver_unregister(&iio_sysfs_trigger_driver);
+}
+module_exit(iio_sysfs_trig_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Sysfs based trigger for the iio subsystem");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:iio-trig-sysfs");