drivers/auxdisplay/ht16k33.c

93 	struct ht16k33_keypad keypad;
338  * This gets the keys from keypad and reports it to input subsystem.
341 static bool ht16k33_keypad_scan(struct ht16k33_keypad *keypad)
343 	const unsigned short *keycodes = keypad->dev->keycode;
351 	rc = i2c_smbus_read_i2c_block_data(keypad->client, 0x40,
354 		dev_err(&keypad->client->dev,
359 	for (col = 0; col < keypad->cols; col++) {
363 		bits_changed = keypad->last_key_state[col] ^ new_state[col];
366 			code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
367 			input_event(keypad->dev, EV_MSC, MSC_SCAN, code);
368 			input_report_key(keypad->dev, keycodes[code],
372 	input_sync(keypad->dev);
373 	memcpy(keypad->last_key_state, new_state, sizeof(u16) * keypad->cols);
380 	struct ht16k33_keypad *keypad = dev;
383 		wait_event_timeout(keypad->wait, keypad->stopped,
384 				    msecs_to_jiffies(keypad->debounce_ms));
385 		if (keypad->stopped)
387 	} while (ht16k33_keypad_scan(keypad));
394 	struct ht16k33_keypad *keypad = input_get_drvdata(dev);
396 	keypad->stopped = false;
398 	enable_irq(keypad->client->irq);
405 	struct ht16k33_keypad *keypad = input_get_drvdata(dev);
407 	keypad->stopped = true;
409 	wake_up(&keypad->wait);
410 	disable_irq(keypad->client->irq);
506 				struct ht16k33_keypad *keypad)
513 	keypad->client = client;
514 	init_waitqueue_head(&keypad->wait);
516 	keypad->dev = devm_input_allocate_device(dev);
517 	if (!keypad->dev)
520 	input_set_drvdata(keypad->dev, keypad);
522 	keypad->dev->name = DRIVER_NAME"-keypad";
523 	keypad->dev->id.bustype = BUS_I2C;
524 	keypad->dev->open = ht16k33_keypad_start;
525 	keypad->dev->close = ht16k33_keypad_stop;
528 		__set_bit(EV_REP, keypad->dev->evbit);
531 				       &keypad->debounce_ms);
547 	keypad->rows = rows;
548 	keypad->cols = cols;
549 	keypad->row_shift = get_count_order(cols);
552 					 keypad->dev);
561 					DRIVER_NAME, keypad);
568 	ht16k33_keypad_stop(keypad->dev);
570 	return input_register_device(keypad->dev);
714 		err = ht16k33_keypad_probe(client, &priv->keypad);