1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  qt2160.c - Atmel AT42QT2160 Touch Sense Controller
35 #define QT2160_CYCLE_INTERVAL	2000 /* msec - 2 sec */
73 	struct qt2160_data *qt2160 = led->qt2160;  in qt2160_led_set()
74 	struct i2c_client *client = qt2160->client;  in qt2160_led_set()
75 	u32 drive, pwmen;  in qt2160_led_set()  local
77 	if (value != led->brightness) {  in qt2160_led_set()
78 		drive = qt2160_read(client, QT2160_CMD_DRIVE_X);  in qt2160_led_set()
81 			drive |= BIT(led->id);  in qt2160_led_set()
82 			pwmen |= BIT(led->id);  in qt2160_led_set()
85 			drive &= ~BIT(led->id);  in qt2160_led_set()
86 			pwmen &= ~BIT(led->id);  in qt2160_led_set()
88 		qt2160_write(client, QT2160_CMD_DRIVE_X, drive);  in qt2160_led_set()
98 		led->brightness = value;  in qt2160_led_set()
116 	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C))	{  in qt2160_read_block()
120 			dev_err(&client->dev,  in qt2160_read_block()
127 			dev_err(&client->dev,  in qt2160_read_block()
133 		while (count--) {  in qt2160_read_block()
138 				dev_err(&client->dev,  in qt2160_read_block()
145 				dev_err(&client->dev,  in qt2160_read_block()
160 	struct i2c_client *client = qt2160->client;  in qt2160_get_key_matrix()
163 	int ret, i, mask;  in qt2160_get_key_matrix()  local
165 	dev_dbg(&client->dev, "requesting keys...\n");  in qt2160_get_key_matrix()
173 		dev_err(&client->dev,  in qt2160_get_key_matrix()
178 	old_matrix = qt2160->key_matrix;  in qt2160_get_key_matrix()
179 	qt2160->key_matrix = new_matrix = (regs[2] << 8) | regs[1];  in qt2160_get_key_matrix()
182 	for (i = 0; i < 16; ++i, mask <<= 1) {  in qt2160_get_key_matrix()
186 			input_report_key(input, qt2160->keycodes[i], keyval);  in qt2160_get_key_matrix()
187 			dev_dbg(&client->dev, "key %d %s\n",  in qt2160_get_key_matrix()
188 				i, keyval ? "pressed" : "released");  in qt2160_get_key_matrix()
210 		dev_err(&client->dev,  in qt2160_read()
217 		dev_err(&client->dev,  in qt2160_read()
231 		dev_err(&client->dev,  in qt2160_write()
241 	struct i2c_client *client = qt2160->client;  in qt2160_register_leds()
243 	int i;  in qt2160_register_leds()  local
245 	for (i = 0; i < QT2160_NUM_LEDS_X; i++) {  in qt2160_register_leds()
246 		struct qt2160_led *led = &qt2160->leds[i];  in qt2160_register_leds()
248 		snprintf(led->name, sizeof(led->name), "qt2160:x%d", i);  in qt2160_register_leds()
249 		led->cdev.name = led->name;  in qt2160_register_leds()
250 		led->cdev.brightness_set_blocking = qt2160_led_set;  in qt2160_register_leds()
251 		led->cdev.brightness = LED_OFF;  in qt2160_register_leds()
252 		led->id = i;  in qt2160_register_leds()
253 		led->qt2160 = qt2160;  in qt2160_register_leds()
255 		error = devm_led_classdev_register(&client->dev, &led->cdev);  in qt2160_register_leds()
284 		dev_err(&client->dev, "ID %d not supported\n", id);  in qt2160_identify()
291 		dev_err(&client->dev, "could not get firmware version\n");  in qt2160_identify()
298 		dev_err(&client->dev, "could not get firmware revision\n");  in qt2160_identify()
302 	dev_info(&client->dev, "AT42QT2160 firmware version %d.%d.%d\n",  in qt2160_identify()
312 	int i;  in qt2160_probe()  local
315 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) {  in qt2160_probe()
316 		dev_err(&client->dev, "%s adapter not supported\n",  in qt2160_probe()
317 			dev_driver_string(&client->adapter->dev));  in qt2160_probe()
318 		return -ENODEV;  in qt2160_probe()
322 		return -ENODEV;  in qt2160_probe()
325 	qt2160 = devm_kzalloc(&client->dev, sizeof(*qt2160), GFP_KERNEL);  in qt2160_probe()
327 		return -ENOMEM;  in qt2160_probe()
329 	input = devm_input_allocate_device(&client->dev);  in qt2160_probe()
331 		return -ENOMEM;  in qt2160_probe()
333 	qt2160->client = client;  in qt2160_probe()
334 	qt2160->input = input;  in qt2160_probe()
336 	input->name = "AT42QT2160 Touch Sense Keyboard";  in qt2160_probe()
337 	input->id.bustype = BUS_I2C;  in qt2160_probe()
339 	input->keycode = qt2160->keycodes;  in qt2160_probe()
340 	input->keycodesize = sizeof(qt2160->keycodes[0]);  in qt2160_probe()
341 	input->keycodemax = ARRAY_SIZE(qt2160_key2code);  in qt2160_probe()
343 	__set_bit(EV_KEY, input->evbit);  in qt2160_probe()
344 	__clear_bit(EV_REP, input->evbit);  in qt2160_probe()
345 	for (i = 0; i < ARRAY_SIZE(qt2160_key2code); i++) {  in qt2160_probe()
346 		qt2160->keycodes[i] = qt2160_key2code[i];  in qt2160_probe()
347 		__set_bit(qt2160_key2code[i], input->keybit);  in qt2160_probe()
349 	__clear_bit(KEY_RESERVED, input->keybit);  in qt2160_probe()
356 		dev_err(&client->dev, "failed to calibrate device\n");  in qt2160_probe()
360 	if (client->irq) {  in qt2160_probe()
361 		error = devm_request_threaded_irq(&client->dev, client->irq,  in qt2160_probe()
366 			dev_err(&client->dev,  in qt2160_probe()
367 				"failed to allocate irq %d\n", client->irq);  in qt2160_probe()
373 			dev_err(&client->dev, "Failed to setup polling\n");  in qt2160_probe()
381 		dev_err(&client->dev, "Failed to register leds\n");  in qt2160_probe()
385 	error = input_register_device(qt2160->input);  in qt2160_probe()
387 		dev_err(&client->dev,  in qt2160_probe()