41 static void pps_echo_client_default(struct pps_device *pps, int event,  in pps_echo_client_default()  argument
44 	dev_info(&pps->dev, "echo %s %s\n",  in pps_echo_client_default()
53 /* pps_register_source - add a PPS source in the system
54  * @info: the PPS info struct
55  * @default_params: the default PPS parameters of the new source
57  * This function is used to add a new PPS source in the system. The new
58  * source is described by info's fields and it will have, as default PPS
61  * The function returns, in case of success, the PPS device. Otherwise
68 	struct pps_device *pps;  in pps_register_source()  local
85 	/* Allocate memory for the new PPS source struct */  in pps_register_source()
86 	pps = kzalloc_obj(struct pps_device);  in pps_register_source()
87 	if (pps == NULL) {  in pps_register_source()
95 	pps->params.api_version = PPS_API_VERS;  in pps_register_source()
96 	pps->params.mode = default_params;  in pps_register_source()
97 	pps->info = *info;  in pps_register_source()
100 	if ((pps->info.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) &&  in pps_register_source()
101 			pps->info.echo == NULL)  in pps_register_source()
102 		pps->info.echo = pps_echo_client_default;  in pps_register_source()
104 	init_waitqueue_head(&pps->queue);  in pps_register_source()
105 	spin_lock_init(&pps->lock);  in pps_register_source()
108 	err = pps_register_cdev(pps);  in pps_register_source()
115 	dev_dbg(&pps->dev, "new PPS source %s\n", info->name);  in pps_register_source()
117 	return pps;  in pps_register_source()
126 /* pps_unregister_source - remove a PPS source from the system
127  * @pps: the PPS source
129  * This function is used to remove a previously registered PPS source from
133 void pps_unregister_source(struct pps_device *pps)  in pps_unregister_source()  argument
135 	pps_kc_remove(pps);  in pps_unregister_source()
136 	pps_unregister_cdev(pps);  in pps_unregister_source()
138 	/* don't have to kfree(pps) here because it will be done on  in pps_unregister_source()
143 /* pps_event - register a PPS event into the system
144  * @pps: the PPS device
149  * This function is used by each PPS client in order to register a new
150  * PPS event into the system (it's usually called inside an IRQ handler).
152  * If an echo function is associated with the PPS device it will be called
154  *	pps->info.echo(pps, event, data);
156 void pps_event(struct pps_device *pps, struct pps_event_time *ts, int event,  in pps_event()  argument
166 	dev_dbg(&pps->dev, "PPS event at %ptSp\n", &ts->ts_real);  in pps_event()
170 	spin_lock_irqsave(&pps->lock, flags);  in pps_event()
173 	if ((pps->params.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)))  in pps_event()
174 		pps->info.echo(pps, event, data);  in pps_event()
177 	pps->current_mode = pps->params.mode;  in pps_event()
178 	if (event & pps->params.mode & PPS_CAPTUREASSERT) {  in pps_event()
180 		if (pps->params.mode & PPS_OFFSETASSERT)  in pps_event()
182 					&pps->params.assert_off_tu);  in pps_event()
185 		pps->assert_tu = ts_real;  in pps_event()
186 		pps->assert_sequence++;  in pps_event()
187 		dev_dbg(&pps->dev, "capture assert seq #%u\n",  in pps_event()
188 			pps->assert_sequence);  in pps_event()
192 	if (event & pps->params.mode & PPS_CAPTURECLEAR) {  in pps_event()
194 		if (pps->params.mode & PPS_OFFSETCLEAR)  in pps_event()
196 					&pps->params.clear_off_tu);  in pps_event()
199 		pps->clear_tu = ts_real;  in pps_event()
200 		pps->clear_sequence++;  in pps_event()
201 		dev_dbg(&pps->dev, "capture clear seq #%u\n",  in pps_event()
202 			pps->clear_sequence);  in pps_event()
207 	pps_kc_event(pps, ts, event);  in pps_event()
211 		pps->last_ev++;  in pps_event()
212 		wake_up_interruptible_all(&pps->queue);  in pps_event()
214 		kill_fasync(&pps->async_queue, SIGIO, POLL_IN);  in pps_event()
217 	spin_unlock_irqrestore(&pps->lock, flags);  in pps_event()