62 	struct i2c_client *client;  member
69 static int qt1070_read(struct i2c_client *client, u8 reg)  in qt1070_read()  argument
73 	ret = i2c_smbus_read_byte_data(client, reg);  in qt1070_read()
75 		dev_err(&client->dev,  in qt1070_read()
81 static int qt1070_write(struct i2c_client *client, u8 reg, u8 data)  in qt1070_write()  argument
85 	ret = i2c_smbus_write_byte_data(client, reg, data);  in qt1070_write()
87 		dev_err(&client->dev,  in qt1070_write()
93 static bool qt1070_identify(struct i2c_client *client)  in qt1070_identify()  argument
95 	int id, ver;  in qt1070_identify()  local
97 	/* Read Chip ID */  in qt1070_identify()
98 	id = qt1070_read(client, CHIP_ID);  in qt1070_identify()
99 	if (id != QT1070_CHIP_ID) {  in qt1070_identify()
100 		dev_err(&client->dev, "ID %d not supported\n", id);  in qt1070_identify()
105 	ver = qt1070_read(client, FW_VERSION);  in qt1070_identify()
107 		dev_err(&client->dev, "could not read the firmware version\n");  in qt1070_identify()
111 	dev_info(&client->dev, "AT42QT1070 firmware version %x\n", ver);  in qt1070_identify()
119 	struct i2c_client *client = data->client;  in qt1070_interrupt()  local
120 	struct input_dev *input = data->input;  in qt1070_interrupt()
125 	qt1070_read(client, DET_STATUS);  in qt1070_interrupt()
128 	new_keys = qt1070_read(client, KEY_STATUS);  in qt1070_interrupt()
132 		if ((data->last_keys & mask) != keyval)  in qt1070_interrupt()
133 			input_report_key(input, data->keycodes[i], keyval);  in qt1070_interrupt()
138 	data->last_keys = new_keys;  in qt1070_interrupt()
142 static int qt1070_probe(struct i2c_client *client,  in qt1070_probe()  argument
143 				const struct i2c_device_id *id)  in qt1070_probe()  argument
150 	err = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE);  in qt1070_probe()
152 		dev_err(&client->dev, "%s adapter not supported\n",  in qt1070_probe()
153 			dev_driver_string(&client->adapter->dev));  in qt1070_probe()
154 		return -ENODEV;  in qt1070_probe()
157 	if (!client->irq) {  in qt1070_probe()
158 		dev_err(&client->dev, "please assign the irq to this device\n");  in qt1070_probe()
159 		return -EINVAL;  in qt1070_probe()
163 	if (!qt1070_identify(client))  in qt1070_probe()
164 		return -ENODEV;  in qt1070_probe()
169 		dev_err(&client->dev, "insufficient memory\n");  in qt1070_probe()
170 		err = -ENOMEM;  in qt1070_probe()
174 	data->client = client;  in qt1070_probe()
175 	data->input = input;  in qt1070_probe()
176 	data->irq = client->irq;  in qt1070_probe()
178 	input->name = "AT42QT1070 QTouch Sensor";  in qt1070_probe()
179 	input->dev.parent = &client->dev;  in qt1070_probe()
180 	input->id.bustype = BUS_I2C;  in qt1070_probe()
183 	input->keycode = data->keycodes;  in qt1070_probe()
184 	input->keycodesize = sizeof(data->keycodes[0]);  in qt1070_probe()
185 	input->keycodemax = ARRAY_SIZE(qt1070_key2code);  in qt1070_probe()
187 	__set_bit(EV_KEY, input->evbit);  in qt1070_probe()
190 		data->keycodes[i] = qt1070_key2code[i];  in qt1070_probe()
191 		__set_bit(qt1070_key2code[i], input->keybit);  in qt1070_probe()
195 	qt1070_write(client, CALIBRATE_CMD, 1);  in qt1070_probe()
199 	qt1070_write(client, RESET, 1);  in qt1070_probe()
202 	err = request_threaded_irq(client->irq, NULL, qt1070_interrupt,  in qt1070_probe()
204 				   client->dev.driver->name, data);  in qt1070_probe()
206 		dev_err(&client->dev, "fail to request irq\n");  in qt1070_probe()
211 	err = input_register_device(data->input);  in qt1070_probe()
213 		dev_err(&client->dev, "Failed to register input device\n");  in qt1070_probe()
217 	i2c_set_clientdata(client, data);  in qt1070_probe()
220 	qt1070_read(client, DET_STATUS);  in qt1070_probe()
225 	free_irq(client->irq, data);  in qt1070_probe()
232 static int qt1070_remove(struct i2c_client *client)  in qt1070_remove()  argument
234 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_remove()
237 	free_irq(client->irq, data);  in qt1070_remove()
239 	input_unregister_device(data->input);  in qt1070_remove()
248 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_suspend()  local
249 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_suspend()
252 		enable_irq_wake(data->irq);  in qt1070_suspend()
259 	struct i2c_client *client = to_i2c_client(dev);  in qt1070_resume()  local
260 	struct qt1070_data *data = i2c_get_clientdata(client);  in qt1070_resume()
263 		disable_irq_wake(data->irq);  in qt1070_resume()