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authorDmitry Torokhov <dtor@insightbb.com>2007-04-29 23:42:45 -0400
committerDmitry Torokhov <dtor@insightbb.com>2007-04-29 23:42:45 -0400
commit0dcd8073673115eeb67343787f244905f62532f2 (patch)
treefd419ac046696d3255d029dd77005c3345f5a9f1 /include
parent85796e7d939a39787f10a643477298678fed85db (diff)
Input: add skeleton for simple polled devices
input-polldev provides a skeleton for supporting simple input devices that need to be periodically scanned or polled to detect changes in their state. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include')
-rw-r--r--include/linux/input-polldev.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/include/linux/input-polldev.h b/include/linux/input-polldev.h
new file mode 100644
index 00000000000..597a0077b3c
--- /dev/null
+++ b/include/linux/input-polldev.h
@@ -0,0 +1,46 @@
+#ifndef _INPUT_POLLDEV_H
+#define _INPUT_POLLDEV_H
+
+/*
+ * Copyright (c) 2007 Dmitry Torokhov
+ *
+ * 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.
+ */
+
+#include <linux/input.h>
+#include <linux/workqueue.h>
+
+/**
+ * struct input_polled_dev - simple polled input device
+ * @private: private driver data
+ * @flush: driver-supplied method that flushes device's state upon
+ * opening (optional)
+ * @poll: driver-supplied method that polls the device and posts
+ * input events (mandatory).
+ * @poll_interval: specifies how often the poll() method shoudl be called.
+ * @input: input device structire associated with the polled device.
+ * Must be properly initialized by the driver (id, name, phys, bits).
+ *
+ * Polled input device provides a skeleton for supporting simple input
+ * devices that do not raise interrupts but have to be periodically
+ * scanned or polled to detect changes in their state.
+ */
+struct input_polled_dev {
+ void *private;
+
+ void (*flush)(struct input_polled_dev *dev);
+ void (*poll)(struct input_polled_dev *dev);
+ unsigned int poll_interval; /* msec */
+
+ struct input_dev *input;
+ struct delayed_work work;
+};
+
+struct input_polled_dev *input_allocate_polled_device(void);
+void input_free_polled_device(struct input_polled_dev *dev);
+int input_register_polled_device(struct input_polled_dev *dev);
+void input_unregister_polled_device(struct input_polled_dev *dev);
+
+#endif