1 // SPDX-License-Identifier: GPL-2.0-or-later
49 	struct i2c_client *client;  member
56 static int qt1070_read(struct i2c_client *client, u8 reg)  in qt1070_read()  argument
60 	ret = i2c_smbus_read_byte_data(client, reg);  in qt1070_read()
62 		dev_err(&client->dev,  in qt1070_read()
68 static int qt1070_write(struct i2c_client *client, u8 reg, u8 data)  in qt1070_write()  argument
72 	ret = i2c_smbus_write_byte_data(client, reg, data);  in qt1070_write()
74 		dev_err(&client->dev,  in qt1070_write()
80 static bool qt1070_identify(struct i2c_client *client)  in qt1070_identify()  argument
82 	int id, ver;  in qt1070_identify()  local
84 	/* Read Chip ID */  in qt1070_identify()
85 	id = qt1070_read(client, CHIP_ID);  in qt1070_identify()
86 	if (id != QT1070_CHIP_ID) {  in qt1070_identify()
87 		dev_err(&client->dev, "ID %d not supported\n", id);  in qt1070_identify()
92 	ver = qt1070_read(client, FW_VERSION);  in qt1070_identify()
94 		dev_err(&client->dev, "could not read the firmware version\n");  in qt1070_identify()
98 	dev_info(&client->dev, "AT42QT1070 firmware version %x\n", ver);  in qt1070_identify()
106 	struct i2c_client *client = data->client;  in qt1070_interrupt()  local
107 	struct input_dev *input = data->input;  in qt1070_interrupt()
112 	qt1070_read(client, DET_STATUS);  in qt1070_interrupt()
115 	new_keys = qt1070_read(client, KEY_STATUS);  in qt1070_interrupt()
119 		if ((data->last_keys & mask) != keyval)  in qt1070_interrupt()
120 			input_report_key(input, data->keycodes[i], keyval);  in qt1070_interrupt()
125 	data->last_keys = new_keys;  in qt1070_interrupt()
129 static int qt1070_probe(struct i2c_client *client,  in qt1070_probe()  argument
130 				const struct i2c_device_id *id)  in qt1070_probe()  argument
137 	err = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE);  in qt1070_probe()
139 		dev_err(&client->dev, "%s adapter not supported\n",  in qt1070_probe()
140 			dev_driver_string(&client->adapter->dev));  in qt1070_probe()
141 		return -ENODEV;  in qt1070_probe()
144 	if (!client->irq) {  in qt1070_probe()
145 		dev_err(&client->dev, "please assign the irq to this device\n");  in qt1070_probe()
146 		return -EINVAL;  in qt1070_probe()
150 	if (!qt1070_identify(client))  in qt1070_probe()
151 		return -ENODEV;  in qt1070_probe()
156 		dev_err(&client->dev, "insufficient memory\n");  in qt1070_probe()
157 		err = -ENOMEM;  in qt1070_probe()
161 	data->client = client;  in qt1070_probe()
162 	data->input = input;  in qt1070_probe()
163 	data->irq = client->irq;  in qt1070_probe()
165 	input->name = "AT42QT1070 QTouch Sensor";  in qt1070_probe()
166 	input->dev.parent = &client->dev;  in qt1070_probe()
167 	input->id.bustype = BUS_I2C;  in qt1070_probe()
170 	input->keycode = data->keycodes;  in qt1070_probe()
171 	input->keycodesize = sizeof(data->keycodes[0]);  in qt1070_probe()
172 	input->keycodemax = ARRAY_SIZE(qt1070_key2code);  in qt1070_probe()
174 	__set_bit(EV_KEY, input->evbit);  in qt1070_probe()
177 		data->keycodes[i] = qt1070_key2code[i];  in qt1070_probe()
178 		__set_bit(qt1070_key2code[i], input->keybit);  in qt1070_probe()
182 	qt1070_write(client, CALIBRATE_CMD, 1);  in qt1070_probe()
186 	qt1070_write(client, RESET, 1);  in qt1070_probe()
189 	err = request_threaded_irq(client->irq, NULL, qt1070_interrupt,  in qt1070_probe()
191 				   client->dev.driver->name, data);  in qt1070_probe()
193 		dev_err(&client->dev, "fail to request irq\n");  in qt1070_probe()
198 	err = input_register_device(data->input);  in qt1070_probe()
200 		dev_err(&client->dev, "Failed to register input device\n");  in qt1070_probe()
204 	i2c_set_clientdata(client, data);  in qt1070_probe()
207 	qt1070_read(client, DET_STATUS);  in qt1070_probe()
212 	free_irq(client->irq, data);  in qt1070_probe()
219 static void qt1070_remove(struct i2c_client *client)  in qt1070_remove()  argument
221 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_remove()
224 	free_irq(client->irq, data);  in qt1070_remove()
226 	input_unregister_device(data->input);  in qt1070_remove()
233 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_suspend()  local
234 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_suspend()
237 		enable_irq_wake(data->irq);  in qt1070_suspend()
244 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_resume()  local
245 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_resume()
248 		disable_irq_wake(data->irq);  in qt1070_resume()