1 // SPDX-License-Identifier: GPL-2.0-or-later
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/i2c.h>
16 #include <linux/input.h>
17 #include <linux/slab.h>
18 #include <linux/irq.h>
19 #include <linux/interrupt.h>
20 #include <linux/jiffies.h>
21 #include <linux/delay.h>
52 	unsigned short keycodes[ARRAY_SIZE(qt1070_key2code)];  member
62 		dev_err(&client->dev,  in qt1070_read()
74 		dev_err(&client->dev,  in qt1070_write()
87 		dev_err(&client->dev, "ID %d not supported\n", id);  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()
107 	struct input_dev *input = data->input;  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()
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()
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()
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()
212 	free_irq(client->irq, data);  in qt1070_probe()
224 	free_irq(client->irq, data);  in qt1070_remove()
226 	input_unregister_device(data->input);  in qt1070_remove()
237 		enable_irq_wake(data->irq);  in qt1070_suspend()
248 		disable_irq_wake(data->irq);  in qt1070_resume()