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
136 	err = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE);  in qt1070_probe()
138 		dev_err(&client->dev, "%s adapter not supported\n",  in qt1070_probe()
139 			dev_driver_string(&client->adapter->dev));  in qt1070_probe()
140 		return -ENODEV;  in qt1070_probe()
143 	if (!client->irq) {  in qt1070_probe()
144 		dev_err(&client->dev, "please assign the irq to this device\n");  in qt1070_probe()
145 		return -EINVAL;  in qt1070_probe()
149 	if (!qt1070_identify(client))  in qt1070_probe()
150 		return -ENODEV;  in qt1070_probe()
152 	data = devm_kzalloc(&client->dev, sizeof(struct qt1070_data),  in qt1070_probe()
155 		return -ENOMEM;  in qt1070_probe()
157 	input = devm_input_allocate_device(&client->dev);  in qt1070_probe()
159 		return -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->id.bustype = BUS_I2C;  in qt1070_probe()
169 	input->keycode = data->keycodes;  in qt1070_probe()
170 	input->keycodesize = sizeof(data->keycodes[0]);  in qt1070_probe()
171 	input->keycodemax = ARRAY_SIZE(qt1070_key2code);  in qt1070_probe()
173 	__set_bit(EV_KEY, input->evbit);  in qt1070_probe()
176 		data->keycodes[i] = qt1070_key2code[i];  in qt1070_probe()
177 		__set_bit(qt1070_key2code[i], input->keybit);  in qt1070_probe()
181 	qt1070_write(client, CALIBRATE_CMD, 1);  in qt1070_probe()
185 	qt1070_write(client, RESET, 1);  in qt1070_probe()
188 	err = devm_request_threaded_irq(&client->dev, client->irq,  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()
214 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_suspend()  local
215 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_suspend()
218 		enable_irq_wake(data->irq);  in qt1070_suspend()
225 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_resume()  local
226 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_resume()
229 		disable_irq_wake(data->irq);  in qt1070_resume()