Fri, 28 Mar 2014 09:42:28 -0700 от Dmitry Torokhov [off-list ref]:

Hi Alexander,

On Tue, Mar 18, 2014 at 10:02:19PM +0400, Alexander Shiyan wrote:

quoted

+	err = input_register_polled_device(poll_dev);
+	if (!err) {
+		/* Report initial state */
+		clps711x_keypad_poll(poll_dev);
+
+		return 0;
+	}

The polled device core will report initial state when input device is
opened (as long as polling is enabled) so I removed this cunk and
applied the rest.

I looked amended version, it is made incorrectly.
...
+ err = input_register_polled_device(poll_dev);
+ if (err)
+ goto out_err;
+
+out_err:
+ input_free_polled_device(poll_dev);
...

Should be:
 err = input_register_polled_device(poll_dev);
 if (!err)
 return 0;

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