1 // SPDX-License-Identifier: GPL-2.0-or-later
4  * on the Acer Iconia One 7 B1-750 tablet.
70 			.addr = client->addr,  in nvt_ts_read_data()
75 			.addr = client->addr,  in nvt_ts_read_data()
83 	ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));  in nvt_ts_read_data()
85 		dev_err(&client->dev, "Error reading from 0x%02x: %d\n", reg, ret);  in nvt_ts_read_data()
86 		return (ret < 0) ? ret : -EIO;  in nvt_ts_read_data()
95 	struct device *dev = &data->client->dev;  in nvt_ts_irq()
96 	int i, error, slot, x, y;  in nvt_ts_irq()  local
98 	u8 *touch;  in nvt_ts_irq()  local
100 	error = nvt_ts_read_data(data->client, NVT_TS_TOUCH_START, data->buf,  in nvt_ts_irq()
101 				 data->max_touches * NVT_TS_TOUCH_SIZE);  in nvt_ts_irq()
105 	for (i = 0; i < data->max_touches; i++) {  in nvt_ts_irq()
106 		touch = &data->buf[i * NVT_TS_TOUCH_SIZE];  in nvt_ts_irq()
108 		if (touch[0] == NVT_TS_TOUCH_INVALID)  in nvt_ts_irq()
111 		slot = touch[0] >> NVT_TS_TOUCH_SLOT_SHIFT;  in nvt_ts_irq()
112 		if (slot < 1 || slot > data->max_touches) {  in nvt_ts_irq()
117 		switch (touch[0] & NVT_TS_TOUCH_TYPE_MASK) {  in nvt_ts_irq()
126 			dev_warn(dev, "slot %d unknown state %d\n", slot, touch[0] & 7);  in nvt_ts_irq()
130 		slot--;  in nvt_ts_irq()
131 		x = (touch[1] << 4) | (touch[3] >> 4);  in nvt_ts_irq()
132 		y = (touch[2] << 4) | (touch[3] & 0x0f);  in nvt_ts_irq()
134 		input_mt_slot(data->input, slot);  in nvt_ts_irq()
135 		input_mt_report_slot_state(data->input, MT_TOOL_FINGER, active);  in nvt_ts_irq()
136 		touchscreen_report_pos(data->input, &data->prop, x, y, true);  in nvt_ts_irq()
139 	input_mt_sync_frame(data->input);  in nvt_ts_irq()
140 	input_sync(data->input);  in nvt_ts_irq()
150 	error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_start()
152 		dev_err(&data->client->dev, "failed to enable regulators\n");  in nvt_ts_start()
156 	enable_irq(data->client->irq);  in nvt_ts_start()
157 	gpiod_set_value_cansleep(data->reset_gpio, 0);  in nvt_ts_start()
166 	disable_irq(data->client->irq);  in nvt_ts_stop()
167 	gpiod_set_value_cansleep(data->reset_gpio, 1);  in nvt_ts_stop()
168 	regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_stop()
175 	mutex_lock(&data->input->mutex);  in nvt_ts_suspend()
176 	if (input_device_enabled(data->input))  in nvt_ts_suspend()
177 		nvt_ts_stop(data->input);  in nvt_ts_suspend()
178 	mutex_unlock(&data->input->mutex);  in nvt_ts_suspend()
187 	mutex_lock(&data->input->mutex);  in nvt_ts_resume()
188 	if (input_device_enabled(data->input))  in nvt_ts_resume()
189 		nvt_ts_start(data->input);  in nvt_ts_resume()
190 	mutex_unlock(&data->input->mutex);  in nvt_ts_resume()
199 	struct device *dev = &client->dev;  in nvt_ts_probe()
205 	if (!client->irq) {  in nvt_ts_probe()
207 		return -EINVAL;  in nvt_ts_probe()
212 		return -ENOMEM;  in nvt_ts_probe()
214 	chip = device_get_match_data(&client->dev);  in nvt_ts_probe()
216 		return -EINVAL;  in nvt_ts_probe()
218 	data->client = client;  in nvt_ts_probe()
225 	data->regulators[0].supply = "vcc";  in nvt_ts_probe()
226 	data->regulators[1].supply = "iovcc";  in nvt_ts_probe()
227 	error = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_probe()
233 	error = regulator_bulk_enable(ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_probe()
239 	data->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);  in nvt_ts_probe()
240 	error = PTR_ERR_OR_ZERO(data->reset_gpio);  in nvt_ts_probe()
242 		regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_probe()
249 	error = nvt_ts_read_data(data->client, NVT_TS_PARAMETERS_START,  in nvt_ts_probe()
250 				 data->buf, NVT_TS_PARAMS_SIZE);  in nvt_ts_probe()
251 	gpiod_set_value_cansleep(data->reset_gpio, 1); /* Put back in reset */  in nvt_ts_probe()
252 	regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);  in nvt_ts_probe()
256 	width  = get_unaligned_be16(&data->buf[NVT_TS_PARAMS_WIDTH]);  in nvt_ts_probe()
257 	height = get_unaligned_be16(&data->buf[NVT_TS_PARAMS_HEIGHT]);  in nvt_ts_probe()
258 	data->max_touches = data->buf[NVT_TS_PARAMS_MAX_TOUCH];  in nvt_ts_probe()
259 	irq_type = data->buf[NVT_TS_PARAMS_IRQ_TYPE];  in nvt_ts_probe()
262 	    data->max_touches > NVT_TS_MAX_TOUCHES ||  in nvt_ts_probe()
264 	    data->buf[NVT_TS_PARAMS_WAKE_TYPE] != chip->wake_type ||  in nvt_ts_probe()
265 	    data->buf[NVT_TS_PARAMS_CHIP_ID] != chip->chip_id) {  in nvt_ts_probe()
267 			NVT_TS_PARAMS_SIZE, data->buf);  in nvt_ts_probe()
268 		return -EIO;  in nvt_ts_probe()
271 	dev_dbg(dev, "Detected %dx%d touchscreen with %d max touches\n",  in nvt_ts_probe()
272 		width, height, data->max_touches);  in nvt_ts_probe()
274 	if (data->buf[NVT_TS_PARAMS_MAX_BUTTONS])  in nvt_ts_probe()
279 		return -ENOMEM;  in nvt_ts_probe()
281 	input->name = client->name;  in nvt_ts_probe()
282 	input->id.bustype = BUS_I2C;  in nvt_ts_probe()
283 	input->open = nvt_ts_start;  in nvt_ts_probe()
284 	input->close = nvt_ts_stop;  in nvt_ts_probe()
286 	input_set_abs_params(input, ABS_MT_POSITION_X, 0, width - 1, 0, 0);  in nvt_ts_probe()
287 	input_set_abs_params(input, ABS_MT_POSITION_Y, 0, height - 1, 0, 0);  in nvt_ts_probe()
288 	touchscreen_parse_properties(input, true, &data->prop);  in nvt_ts_probe()
290 	error = input_mt_init_slots(input, data->max_touches,  in nvt_ts_probe()
295 	data->input = input;  in nvt_ts_probe()
298 	error = devm_request_threaded_irq(dev, client->irq, NULL, nvt_ts_irq,  in nvt_ts_probe()
301 					  client->name, data);  in nvt_ts_probe()
327 	{ .compatible = "novatek,nt11205-ts", .data = &nvt_nt11205_ts_data },
328 	{ .compatible = "novatek,nt36672a-ts", .data = &nvt_nt36672a_ts_data },
334 	{ "nt11205-ts", (unsigned long) &nvt_nt11205_ts_data },
335 	{ "nt36672a-ts", (unsigned long) &nvt_nt36672a_ts_data },
342 		.name	= "novatek-nvt-ts",