60 struct dht11 {  struct
93 static int dht11_decode(struct dht11 *dht11, int offset, int timeres)  in dht11_decode()  argument
104 		t = dht11->edges[offset + 2 * i + 2].ts -  in dht11_decode()
105 			dht11->edges[offset + 2 * i + 1].ts;  in dht11_decode()
106 		if (!dht11->edges[offset + 2 * i + 1].value)  in dht11_decode()
120 	dht11->timestamp = ktime_get_real_ns();  in dht11_decode()
122 		dht11->temperature = (((temp_int & 0x7f) << 8) + temp_dec) *  in dht11_decode()
124 		dht11->humidity = ((hum_int << 8) + hum_dec) * 100;  in dht11_decode()
126 		dht11->temperature = temp_int * 1000;  in dht11_decode()
127 		dht11->humidity = hum_int * 1000;  in dht11_decode()
129 		dev_err(dht11->dev,  in dht11_decode()
144 	struct dht11 *dht11 = iio_priv(iio);  in dht11_handle_irq()  local
147 	if (dht11->num_edges < DHT11_EDGES_PER_READ && dht11->num_edges >= 0) {  in dht11_handle_irq()
148 		dht11->edges[dht11->num_edges].ts = ktime_get_real_ns();  in dht11_handle_irq()
149 		dht11->edges[dht11->num_edges++].value =  in dht11_handle_irq()
150 						gpio_get_value(dht11->gpio);  in dht11_handle_irq()
152 		if (dht11->num_edges >= DHT11_EDGES_PER_READ)  in dht11_handle_irq()
153 			complete(&dht11->completion);  in dht11_handle_irq()
163 	struct dht11 *dht11 = iio_priv(iio_dev);  in dht11_read_raw()  local
166 	mutex_lock(&dht11->lock);  in dht11_read_raw()
167 	if (dht11->timestamp + DHT11_DATA_VALID_TIME < ktime_get_real_ns()) {  in dht11_read_raw()
170 			dev_err(dht11->dev, "timeresolution %dns too low\n",  in dht11_read_raw()
180 		reinit_completion(&dht11->completion);  in dht11_read_raw()
182 		dht11->num_edges = 0;  in dht11_read_raw()
183 		ret = gpio_direction_output(dht11->gpio, 0);  in dht11_read_raw()
187 		ret = gpio_direction_input(dht11->gpio);  in dht11_read_raw()
191 		ret = request_irq(dht11->irq, dht11_handle_irq,  in dht11_read_raw()
197 		ret = wait_for_completion_killable_timeout(&dht11->completion,  in dht11_read_raw()
200 		free_irq(dht11->irq, iio_dev);  in dht11_read_raw()
202 		if (ret == 0 && dht11->num_edges < DHT11_EDGES_PER_READ - 1) {  in dht11_read_raw()
205 					dht11->num_edges);  in dht11_read_raw()
211 		ret = dht11_decode(dht11,  in dht11_read_raw()
212 				   dht11->num_edges == DHT11_EDGES_PER_READ ?  in dht11_read_raw()
222 		*val = dht11->temperature;  in dht11_read_raw()
224 		*val = dht11->humidity;  in dht11_read_raw()
228 	dht11->num_edges = -1;  in dht11_read_raw()
229 	mutex_unlock(&dht11->lock);  in dht11_read_raw()
255 	struct dht11 *dht11;  in dht11_probe()  local
259 	iio = devm_iio_device_alloc(dev, sizeof(*dht11));  in dht11_probe()
265 	dht11 = iio_priv(iio);  in dht11_probe()
266 	dht11->dev = dev;  in dht11_probe()
271 	dht11->gpio = ret;  in dht11_probe()
272 	ret = devm_gpio_request_one(dev, dht11->gpio, GPIOF_IN, pdev->name);  in dht11_probe()
276 	dht11->irq = gpio_to_irq(dht11->gpio);  in dht11_probe()
277 	if (dht11->irq < 0) {  in dht11_probe()
278 		dev_err(dev, "GPIO %d has no interrupt\n", dht11->gpio);  in dht11_probe()
282 	dht11->timestamp = ktime_get_real_ns() - DHT11_DATA_VALID_TIME - 1;  in dht11_probe()
283 	dht11->num_edges = -1;  in dht11_probe()
287 	init_completion(&dht11->completion);  in dht11_probe()
288 	mutex_init(&dht11->lock);  in dht11_probe()