[PATCH v3] Input: improve autorepeat initialization

[Petri Gynther <pgynther@google.com>]

Add new function input_enable_softrepeat() that allows drivers to
initialize their own values for input_dev->rep[REP_DELAY] and
input_dev->rep[REP_PERIOD], but also use the software autorepeat
functionality from input.c.

For example, a HID driver could do:

static void xyz_input_configured(struct hid_device *hid,
                                 struct hid_input *hidinput)
{
        input_enable_softrepeat(hidinput->input, 400, 100);
}

static struct hid_driver xyz_driver = {
        .input_configured = xyz_input_configured,
}

Signed-off-by: Petri Gynther <pgynther@google.com>
---
 drivers/input/input.c | 25 +++++++++++++++++++------
 include/linux/input.h |  2 ++
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 5391abd..8806059 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -2045,6 +2045,23 @@ static void devm_input_device_unregister(struct device *dev, void *res)
 }
 
 /**
+ * input_enable_softrepeat - enable software autorepeat
+ * @dev: input device
+ * @delay: repeat delay
+ * @period: repeat period
+ *
+ * Enable software autorepeat on the input device.
+ */
+void input_enable_softrepeat(struct input_dev *dev, int delay, int period)
+{
+	dev->timer.data = (unsigned long) dev;
+	dev->timer.function = input_repeat_key;
+	dev->rep[REP_DELAY] = delay;
+	dev->rep[REP_PERIOD] = period;
+}
+EXPORT_SYMBOL(input_enable_softrepeat);
+
+/**
  * input_register_device - register device with input core
  * @dev: device to be registered
  *
@@ -2108,12 +2125,8 @@ int input_register_device(struct input_dev *dev)
 	 * If delay and period are pre-set by the driver, then autorepeating
 	 * is handled by the driver itself and we don't do it in input.c.
 	 */
-	if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD]) {
-		dev->timer.data = (long) dev;
-		dev->timer.function = input_repeat_key;
-		dev->rep[REP_DELAY] = 250;
-		dev->rep[REP_PERIOD] = 33;
-	}
+	if (!dev->rep[REP_DELAY] && !dev->rep[REP_PERIOD])
+		input_enable_softrepeat(dev, 250, 33);
 
 	if (!dev->getkeycode)
 		dev->getkeycode = input_default_getkeycode;
diff --git a/include/linux/input.h b/include/linux/input.h
index 82ce323..1e96769 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -469,6 +469,8 @@ int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
 int input_set_keycode(struct input_dev *dev,
 		      const struct input_keymap_entry *ke);
 
+void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
+
 extern struct class input_class;
 
 /**
-- 
2.6.0.rc2.230.g3dd15c0