1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/gpio/consumer.h>
12 #include <linux/interrupt.h>
13 #include <linux/i2c.h>
14 #include <linux/input.h>
15 #include <linux/input/mt.h>
16 #include <linux/input/touchscreen.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
34 	__u8 event;  member
61 			.addr = client->addr,  in icn8318_read_touch_data()
66 			.addr = client->addr,  in icn8318_read_touch_data()
73 	return i2c_transfer(client->adapter, msg, 2);  in icn8318_read_touch_data()
76 static inline bool icn8318_touch_active(u8 event)  in icn8318_touch_active()  argument
78 	return (event == ICN8318_EVENT_UPDATE1) ||  in icn8318_touch_active()
79 	       (event == ICN8318_EVENT_UPDATE2);  in icn8318_touch_active()
85 	struct device *dev = &data->client->dev;  in icn8318_irq()
89 	ret = icn8318_read_touch_data(data->client, &touch_data);  in icn8318_irq()
99 		 * softbutton codes to evdev codes. Currently no known devices  in icn8318_irq()
113 		bool act = icn8318_touch_active(touch->event);  in icn8318_irq()
115 		input_mt_slot(data->input, touch->slot);  in icn8318_irq()
116 		input_mt_report_slot_state(data->input, MT_TOOL_FINGER, act);  in icn8318_irq()
120 		touchscreen_report_pos(data->input, &data->prop,  in icn8318_irq()
121 				       be16_to_cpu(touch->x),  in icn8318_irq()
122 				       be16_to_cpu(touch->y), true);  in icn8318_irq()
125 	input_mt_sync_frame(data->input);  in icn8318_irq()
126 	input_sync(data->input);  in icn8318_irq()
135 	enable_irq(data->client->irq);  in icn8318_start()
136 	gpiod_set_value_cansleep(data->wake_gpio, 1);  in icn8318_start()
145 	disable_irq(data->client->irq);  in icn8318_stop()
146 	i2c_smbus_write_byte_data(data->client, ICN8318_REG_POWER,  in icn8318_stop()
148 	gpiod_set_value_cansleep(data->wake_gpio, 0);  in icn8318_stop()
155 	mutex_lock(&data->input->mutex);  in icn8318_suspend()
156 	if (input_device_enabled(data->input))  in icn8318_suspend()
157 		icn8318_stop(data->input);  in icn8318_suspend()
158 	mutex_unlock(&data->input->mutex);  in icn8318_suspend()
167 	mutex_lock(&data->input->mutex);  in icn8318_resume()
168 	if (input_device_enabled(data->input))  in icn8318_resume()
169 		icn8318_start(data->input);  in icn8318_resume()
170 	mutex_unlock(&data->input->mutex);  in icn8318_resume()
179 	struct device *dev = &client->dev;  in icn8318_probe()
184 	if (!client->irq) {  in icn8318_probe()
186 		return -EINVAL;  in icn8318_probe()
191 		return -ENOMEM;  in icn8318_probe()
193 	data->wake_gpio = devm_gpiod_get(dev, "wake", GPIOD_OUT_LOW);  in icn8318_probe()
194 	if (IS_ERR(data->wake_gpio))  in icn8318_probe()
195 		return dev_err_probe(dev, PTR_ERR(data->wake_gpio), "Error getting wake gpio\n");  in icn8318_probe()
199 		return -ENOMEM;  in icn8318_probe()
201 	input->name = client->name;  in icn8318_probe()
202 	input->id.bustype = BUS_I2C;  in icn8318_probe()
203 	input->open = icn8318_start;  in icn8318_probe()
204 	input->close = icn8318_stop;  in icn8318_probe()
205 	input->dev.parent = dev;  in icn8318_probe()
210 	touchscreen_parse_properties(input, true, &data->prop);  in icn8318_probe()
213 		dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");  in icn8318_probe()
214 		return -EINVAL;  in icn8318_probe()
222 	data->client = client;  in icn8318_probe()
223 	data->input = input;  in icn8318_probe()
226 	error = devm_request_threaded_irq(dev, client->irq, NULL, icn8318_irq,  in icn8318_probe()
227 					  IRQF_ONESHOT, client->name, data);  in icn8318_probe()
234 	icn8318_stop(data->input);  in icn8318_probe()
251 /* This is useless for OF-enabled devices, but it is needed by I2C subsystem */