input/touchscreen/tsc2007_core.c

89 bool tsc2007_is_pen_down(struct tsc2007 *ts)
105 	if (!ts->get_pendown_state)
108 	return ts->get_pendown_state(&ts->client->dev);
113 	struct tsc2007 *ts = handle;
114 	struct input_dev *input = ts->input;
118 	while (!ts->stopped && tsc2007_is_pen_down(ts)) {
122 		mutex_lock(&ts->mlock);
123 		tsc2007_read_values(ts, &tc);
124 		mutex_unlock(&ts->mlock);
126 		rt = tsc2007_calculate_resistance(ts, &tc);
128 		if (!rt && !ts->get_pendown_state) {
137 		if (rt <= ts->max_rt) {
138 			dev_dbg(&ts->client->dev,
142 			rt = ts->max_rt - rt;
157 			dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt);
160 		wait_event_timeout(ts->wait, ts->stopped, ts->poll_period);
163 	dev_dbg(&ts->client->dev, "UP\n");
169 	if (ts->clear_penirq)
170 		ts->clear_penirq();
175 static void tsc2007_stop(struct tsc2007 *ts)
177 	ts->stopped = true;
179 	wake_up(&ts->wait);
181 	disable_irq(ts->irq);
186 	struct tsc2007 *ts = input_get_drvdata(input_dev);
189 	ts->stopped = false;
192 	enable_irq(ts->irq);
195 	err = tsc2007_xfer(ts, PWRDOWN);
197 		tsc2007_stop(ts);
206 	struct tsc2007 *ts = input_get_drvdata(input_dev);
208 	tsc2007_stop(ts);
214 	struct tsc2007 *ts = i2c_get_clientdata(client);
216 	return gpiod_get_value_cansleep(ts->gpiod);
219 static int tsc2007_probe_properties(struct device *dev, struct tsc2007 *ts)
225 		ts->max_rt = val32;
227 		ts->max_rt = MAX_12BIT;
230 		ts->fuzzx = val32;
233 		ts->fuzzy = val32;
236 		ts->fuzzz = val32;
239 		ts->poll_period = msecs_to_jiffies(val64);
241 		ts->poll_period = msecs_to_jiffies(1);
244 		ts->x_plate_ohms = val32;
250 	ts->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN);
251 	if (IS_ERR(ts->gpiod))
252 		return PTR_ERR(ts->gpiod);
254 	if (ts->gpiod)
255 		ts->get_pendown_state = tsc2007_get_pendown_state_gpio;
262 static int tsc2007_probe_pdev(struct device *dev, struct tsc2007 *ts,
266 	ts->model             = pdata->model;
267 	ts->x_plate_ohms      = pdata->x_plate_ohms;
268 	ts->max_rt            = pdata->max_rt ? : MAX_12BIT;
269 	ts->poll_period       = msecs_to_jiffies(pdata->poll_period ? : 1);
270 	ts->get_pendown_state = pdata->get_pendown_state;
271 	ts->clear_penirq      = pdata->clear_penirq;
272 	ts->fuzzx             = pdata->fuzzx;
273 	ts->fuzzy             = pdata->fuzzy;
274 	ts->fuzzz             = pdata->fuzzz;
297 	struct tsc2007 *ts;
305 	ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL);
306 	if (!ts)
310 		err = tsc2007_probe_pdev(&client->dev, ts, pdata, id);
312 		err = tsc2007_probe_properties(&client->dev, ts);
320 	i2c_set_clientdata(client, ts);
322 	ts->client = client;
323 	ts->irq = client->irq;
324 	ts->input = input_dev;
326 	init_waitqueue_head(&ts->wait);
327 	mutex_init(&ts->mlock);
329 	snprintf(ts->phys, sizeof(ts->phys),
333 	input_dev->phys = ts->phys;
339 	input_set_drvdata(input_dev, ts);
343 	input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0);
344 	input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0);
346 			     ts->fuzzz, 0);
365 	err = devm_request_threaded_irq(&client->dev, ts->irq,
368 					client->dev.driver->name, ts);
371 			ts->irq, err);
375 	tsc2007_stop(ts);
378 	err = tsc2007_xfer(ts, PWRDOWN);
392 	err =  tsc2007_iio_configure(ts);