1 // SPDX-License-Identifier: GPL-2.0
37 	bool active;  member
43 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_open()  local
44 	struct serdev_device *serdev = data->serdev;  in sirf_open()
51 	serdev_device_set_baudrate(serdev, data->speed);  in sirf_open()
54 	ret = pm_runtime_get_sync(&serdev->dev);  in sirf_open()
56 		dev_err(&gdev->dev, "failed to runtime resume: %d\n", ret);  in sirf_open()
57 		pm_runtime_put_noidle(&serdev->dev);  in sirf_open()
71 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_close()  local
72 	struct serdev_device *serdev = data->serdev;  in sirf_close()
76 	pm_runtime_put(&serdev->dev);  in sirf_close()
82 	struct sirf_data *data = gnss_get_drvdata(gdev);  in sirf_write_raw()  local
83 	struct serdev_device *serdev = data->serdev;  in sirf_write_raw()
106 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_receive_buf()  local
107 	struct gnss_device *gdev = data->gdev;  in sirf_receive_buf()
119 	struct sirf_data *data = dev_id;  in sirf_wakeup_handler()  local
120 	struct device *dev = &data->serdev->dev;  in sirf_wakeup_handler()
123 	ret = gpiod_get_value_cansleep(data->wakeup);  in sirf_wakeup_handler()
124 	dev_dbg(dev, "%s - wakeup = %d\n", __func__, ret);  in sirf_wakeup_handler()
128 	data->active = !!ret;  in sirf_wakeup_handler()
129 	wake_up_interruptible(&data->power_wait);  in sirf_wakeup_handler()
134 static int sirf_wait_for_power_state(struct sirf_data *data, bool active,  in sirf_wait_for_power_state()  argument
139 	ret = wait_event_interruptible_timeout(data->power_wait,  in sirf_wait_for_power_state()
140 			data->active == active, msecs_to_jiffies(timeout));  in sirf_wait_for_power_state()
145 		dev_warn(&data->serdev->dev, "timeout waiting for active state = %d\n",  in sirf_wait_for_power_state()
146 				active);  in sirf_wait_for_power_state()
147 		return -ETIMEDOUT;  in sirf_wait_for_power_state()
153 static void sirf_pulse_on_off(struct sirf_data *data)  in sirf_pulse_on_off()  argument
155 	gpiod_set_value_cansleep(data->on_off, 1);  in sirf_pulse_on_off()
157 	gpiod_set_value_cansleep(data->on_off, 0);  in sirf_pulse_on_off()
160 static int sirf_set_active(struct sirf_data *data, bool active)  in sirf_set_active()  argument
166 	if (active)  in sirf_set_active()
172 		sirf_pulse_on_off(data);  in sirf_set_active()
173 		ret = sirf_wait_for_power_state(data, active, timeout);  in sirf_set_active()
175 			if (ret == -ETIMEDOUT)  in sirf_set_active()
182 	} while (retries--);  in sirf_set_active()
185 		return -ETIMEDOUT;  in sirf_set_active()
192 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_runtime_suspend()  local
194 	if (!data->on_off)  in sirf_runtime_suspend()
195 		return regulator_disable(data->vcc);  in sirf_runtime_suspend()
197 	return sirf_set_active(data, false);  in sirf_runtime_suspend()
202 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_runtime_resume()  local
204 	if (!data->on_off)  in sirf_runtime_resume()
205 		return regulator_enable(data->vcc);  in sirf_runtime_resume()
207 	return sirf_set_active(data, true);  in sirf_runtime_resume()
212 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_suspend()  local
218 	if (data->wakeup)  in sirf_suspend()
219 		disable_irq(data->irq);  in sirf_suspend()
226 	struct sirf_data *data = dev_get_drvdata(dev);  in sirf_resume()  local
229 	if (data->wakeup)  in sirf_resume()
230 		enable_irq(data->irq);  in sirf_resume()
245 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_parse_dt()  local
246 	struct device_node *node = serdev->dev.of_node;  in sirf_parse_dt()
249 	of_property_read_u32(node, "current-speed", &speed);  in sirf_parse_dt()
251 	data->speed = speed;  in sirf_parse_dt()
258 	struct device *dev = &serdev->dev;  in sirf_probe()
260 	struct sirf_data *data;  in sirf_probe()  local
263 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);  in sirf_probe()
264 	if (!data)  in sirf_probe()
265 		return -ENOMEM;  in sirf_probe()
269 		return -ENOMEM;  in sirf_probe()
271 	gdev->type = GNSS_TYPE_SIRF;  in sirf_probe()
272 	gdev->ops = &sirf_gnss_ops;  in sirf_probe()
273 	gnss_set_drvdata(gdev, data);  in sirf_probe()
275 	data->serdev = serdev;  in sirf_probe()
276 	data->gdev = gdev;  in sirf_probe()
278 	init_waitqueue_head(&data->power_wait);  in sirf_probe()
280 	serdev_device_set_drvdata(serdev, data);  in sirf_probe()
287 	data->vcc = devm_regulator_get(dev, "vcc");  in sirf_probe()
288 	if (IS_ERR(data->vcc)) {  in sirf_probe()
289 		ret = PTR_ERR(data->vcc);  in sirf_probe()
293 	data->on_off = devm_gpiod_get_optional(dev, "sirf,onoff",  in sirf_probe()
295 	if (IS_ERR(data->on_off)) {  in sirf_probe()
296 		ret = PTR_ERR(data->on_off);  in sirf_probe()
300 	if (data->on_off) {  in sirf_probe()
301 		data->wakeup = devm_gpiod_get_optional(dev, "sirf,wakeup",  in sirf_probe()
303 		if (IS_ERR(data->wakeup)) {  in sirf_probe()
304 			ret = PTR_ERR(data->wakeup);  in sirf_probe()
312 		if (!data->wakeup) {  in sirf_probe()
314 			ret = -ENODEV;  in sirf_probe()
318 		ret = regulator_enable(data->vcc);  in sirf_probe()
326 	if (data->wakeup) {  in sirf_probe()
327 		ret = gpiod_to_irq(data->wakeup);  in sirf_probe()
330 		data->irq = ret;  in sirf_probe()
332 		ret = request_threaded_irq(data->irq, NULL, sirf_wakeup_handler,  in sirf_probe()
334 				"wakeup", data);  in sirf_probe()
360 	if (data->wakeup)  in sirf_probe()
361 		free_irq(data->irq, data);  in sirf_probe()
363 	if (data->on_off)  in sirf_probe()
364 		regulator_disable(data->vcc);  in sirf_probe()
366 	gnss_put_device(data->gdev);  in sirf_probe()
373 	struct sirf_data *data = serdev_device_get_drvdata(serdev);  in sirf_remove()  local
375 	gnss_deregister_device(data->gdev);  in sirf_remove()
378 		pm_runtime_disable(&serdev->dev);  in sirf_remove()
380 		sirf_runtime_suspend(&serdev->dev);  in sirf_remove()
382 	if (data->wakeup)  in sirf_remove()
383 		free_irq(data->irq, data);  in sirf_remove()
385 	if (data->on_off)  in sirf_remove()
386 		regulator_disable(data->vcc);  in sirf_remove()
388 	gnss_put_device(data->gdev);  in sirf_remove()
404 		.name		= "gnss-sirf",