1 // SPDX-License-Identifier: GPL-2.0
14   - auto idle mode support
22 #include <linux/irq.h>
31  * which can only report one point at a given time.
64 static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)  in egalax_ts_interrupt()  argument
67 	struct input_dev *input_dev = ts->input_dev;  in egalax_ts_interrupt()
68 	struct i2c_client *client = ts->client;  in egalax_ts_interrupt()
77 	} while (ret == -EAGAIN && tries++ < EGALAX_MAX_TRIES);  in egalax_ts_interrupt()
97 		dev_dbg(&client->dev, "point invalid\n");  in egalax_ts_interrupt()
104 	dev_dbg(&client->dev, "%s id:%d x:%d y:%d z:%d",  in egalax_ts_interrupt()
119 /* wake up controller by an falling edge of interrupt gpio.  */
125 	/* wake up controller via an falling edge on IRQ gpio. */  in egalax_wake_up_device()
126 	gpio = gpiod_get(&client->dev, "wakeup", GPIOD_OUT_HIGH);  in egalax_wake_up_device()
129 		if (ret != -EPROBE_DEFER)  in egalax_wake_up_device()
130 			dev_err(&client->dev,  in egalax_wake_up_device()
131 				"failed to request wakeup gpio, cannot wake up controller: %d\n",  in egalax_wake_up_device()
139 	/* controller should be woken up, return irq.  */  in egalax_wake_up_device()
164 	ts = devm_kzalloc(&client->dev, sizeof(struct egalax_ts), GFP_KERNEL);  in egalax_ts_probe()
166 		dev_err(&client->dev, "Failed to allocate memory\n");  in egalax_ts_probe()
167 		return -ENOMEM;  in egalax_ts_probe()
170 	input_dev = devm_input_allocate_device(&client->dev);  in egalax_ts_probe()
172 		dev_err(&client->dev, "Failed to allocate memory\n");  in egalax_ts_probe()
173 		return -ENOMEM;  in egalax_ts_probe()
176 	ts->client = client;  in egalax_ts_probe()
177 	ts->input_dev = input_dev;  in egalax_ts_probe()
179 	/* controller may be in sleep, wake it up. */  in egalax_ts_probe()
186 		dev_err(&client->dev, "Failed to read firmware version\n");  in egalax_ts_probe()
190 	input_dev->name = "EETI eGalax Touch Screen";  in egalax_ts_probe()
191 	input_dev->id.bustype = BUS_I2C;  in egalax_ts_probe()
193 	__set_bit(EV_ABS, input_dev->evbit);  in egalax_ts_probe()
194 	__set_bit(EV_KEY, input_dev->evbit);  in egalax_ts_probe()
195 	__set_bit(BTN_TOUCH, input_dev->keybit);  in egalax_ts_probe()
205 	error = devm_request_threaded_irq(&client->dev, client->irq,  in egalax_ts_probe()
209 		dev_err(&client->dev, "Failed to register interrupt\n");  in egalax_ts_probe()
213 	error = input_register_device(ts->input_dev);  in egalax_ts_probe()
235 		return enable_irq_wake(client->irq);  in egalax_ts_suspend()
246 		return disable_irq_wake(client->irq);  in egalax_ts_resume()