--- drivers/input/misc/keychord.c

+++ drivers/input/misc/keychord.c

@@ -27,6 +27,8 @@

#define KEYCHORD_NAME "keychord"

#define BUFFER_SIZE 16

+#define MATCH_COUNT 3

+#define KEYCHORD_TIMEOUT 5*HZ

MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");

MODULE_DESCRIPTION("Key chord input driver");

@@ -60,8 +62,20 @@ struct keychord_device {

unsigned char head;

unsigned char tail;

__u16 buff[BUFFER_SIZE];

+ struct delayed_work keychord_work;

+ int8_t keychord_match_count;

};

+static void keychord_timeout(struct work_struct *work)

+{

+ struct keychord_device *kdev =

+ container_of(work, struct keychord_device, keychord_work.work);

+

+ pr_info("%s: match_count=%d\n", __func__, kdev->keychord_match_count);

+ if (kdev->keychord_match_count)

+ kdev->keychord_match_count = 0;

+}

+

static int check_keychord(struct keychord_device *kdev,

struct input_keychord *keychord)

{

@@ -75,8 +89,18 @@ static int check_keychord(struct keychor

return 0;

}

- /* we have a match */

- return 1;

+ if (kdev->keychord_match_count++ == 0)

+ schedule_delayed_work(&kdev->keychord_work, KEYCHORD_TIMEOUT);

+

+ if (kdev->keychord_match_count == MATCH_COUNT) {

+ if (cancel_delayed_work(&kdev->keychord_work)) {

+ kdev->keychord_match_count = 0;

+ return 1;

+ } else

+ pr_info("%s: timeout already started\n", __func__);

+ }

+

+ return 0;

}

static void keychord_event(struct input_handle *handle, unsigned int type,

@@ -344,6 +368,7 @@ static int keychord_open(struct inode *i

file->private_data = kdev;

+ INIT_DELAYED_WORK(&kdev->keychord_work, keychord_timeout);

return 0;

}