64 static int wdat_wdt_read(struct wdat_wdt *wdat,  in wdat_wdt_read()  argument
83 	dev_dbg(&wdat->pdev->dev, "Read %#x from 0x%08llx\n", *value,  in wdat_wdt_read()
89 static int wdat_wdt_write(struct wdat_wdt *wdat,  in wdat_wdt_write()  argument
108 	dev_dbg(&wdat->pdev->dev, "Wrote %#x to 0x%08llx\n", value,  in wdat_wdt_write()
114 static int wdat_wdt_run_action(struct wdat_wdt *wdat, unsigned int action,  in wdat_wdt_run_action()  argument
119 	if (action >= ARRAY_SIZE(wdat->instructions))  in wdat_wdt_run_action()
122 	if (!wdat->instructions[action])  in wdat_wdt_run_action()
125 	dev_dbg(&wdat->pdev->dev, "Running action %#x\n", action);  in wdat_wdt_run_action()
128 	list_for_each_entry(instr, wdat->instructions[action], node) {  in wdat_wdt_run_action()
144 			ret = wdat_wdt_read(wdat, instr, &x);  in wdat_wdt_run_action()
154 			ret = wdat_wdt_read(wdat, instr, &x);  in wdat_wdt_run_action()
167 				ret = wdat_wdt_read(wdat, instr, &y);  in wdat_wdt_run_action()
173 			ret = wdat_wdt_write(wdat, instr, x);  in wdat_wdt_run_action()
183 				ret = wdat_wdt_read(wdat, instr, &y);  in wdat_wdt_run_action()
189 			ret = wdat_wdt_write(wdat, instr, x);  in wdat_wdt_run_action()
195 			dev_err(&wdat->pdev->dev, "Unknown instruction: %u\n",  in wdat_wdt_run_action()
204 static int wdat_wdt_enable_reboot(struct wdat_wdt *wdat)  in wdat_wdt_enable_reboot()  argument
214 	ret = wdat_wdt_run_action(wdat, ACPI_WDAT_SET_REBOOT, 0, NULL);  in wdat_wdt_enable_reboot()
216 		dev_err(&wdat->pdev->dev,  in wdat_wdt_enable_reboot()
224 static void wdat_wdt_boot_status(struct wdat_wdt *wdat)  in wdat_wdt_boot_status()  argument
229 	ret = wdat_wdt_run_action(wdat, ACPI_WDAT_GET_STATUS, 0, &boot_status);  in wdat_wdt_boot_status()
231 		dev_err(&wdat->pdev->dev, "Failed to read boot status\n");  in wdat_wdt_boot_status()
236 		wdat->wdd.bootstatus = WDIOF_CARDRESET;  in wdat_wdt_boot_status()
239 	ret = wdat_wdt_run_action(wdat, ACPI_WDAT_SET_STATUS, 0, NULL);  in wdat_wdt_boot_status()
241 		dev_err(&wdat->pdev->dev, "Failed to clear boot status\n");  in wdat_wdt_boot_status()
244 static void wdat_wdt_set_running(struct wdat_wdt *wdat)  in wdat_wdt_set_running()  argument
249 	ret = wdat_wdt_run_action(wdat, ACPI_WDAT_GET_RUNNING_STATE, 0,  in wdat_wdt_set_running()
252 		dev_err(&wdat->pdev->dev, "Failed to read running state\n");  in wdat_wdt_set_running()
255 		set_bit(WDOG_HW_RUNNING, &wdat->wdd.status);  in wdat_wdt_set_running()
278 	struct wdat_wdt *wdat = to_wdat_wdt(wdd);  in wdat_wdt_set_timeout()  local
282 	periods = timeout * 1000 / wdat->period;  in wdat_wdt_set_timeout()
283 	ret = wdat_wdt_run_action(wdat, ACPI_WDAT_SET_COUNTDOWN, periods, NULL);  in wdat_wdt_set_timeout()
291 	struct wdat_wdt *wdat = to_wdat_wdt(wdd);  in wdat_wdt_get_timeleft()  local
294 	wdat_wdt_run_action(wdat, ACPI_WDAT_GET_CURRENT_COUNTDOWN, 0, &periods);  in wdat_wdt_get_timeleft()
295 	return periods * wdat->period / 1000;  in wdat_wdt_get_timeleft()
318 	struct wdat_wdt *wdat;  in wdat_wdt_probe()  local
329 	wdat = devm_kzalloc(dev, sizeof(*wdat), GFP_KERNEL);  in wdat_wdt_probe()
330 	if (!wdat)  in wdat_wdt_probe()
344 	wdat->period = tbl->timer_period;  in wdat_wdt_probe()
345 	wdat->wdd.min_hw_heartbeat_ms = wdat->period * tbl->min_count;  in wdat_wdt_probe()
346 	wdat->wdd.max_hw_heartbeat_ms = wdat->period * tbl->max_count;  in wdat_wdt_probe()
347 	wdat->stopped_in_sleep = tbl->flags & ACPI_WDAT_STOPPED;  in wdat_wdt_probe()
348 	wdat->wdd.info = &wdat_wdt_info;  in wdat_wdt_probe()
349 	wdat->wdd.ops = &wdat_wdt_ops;  in wdat_wdt_probe()
350 	wdat->pdev = pdev;  in wdat_wdt_probe()
424 		instructions = wdat->instructions[action];  in wdat_wdt_probe()
433 			wdat->instructions[action] = instructions;  in wdat_wdt_probe()
439 	wdat_wdt_boot_status(wdat);  in wdat_wdt_probe()
440 	wdat_wdt_set_running(wdat);  in wdat_wdt_probe()
442 	ret = wdat_wdt_enable_reboot(wdat);  in wdat_wdt_probe()
446 	platform_set_drvdata(pdev, wdat);  in wdat_wdt_probe()
453 	if (timeout * 1000 < wdat->wdd.min_hw_heartbeat_ms ||  in wdat_wdt_probe()
454 	    timeout * 1000 > wdat->wdd.max_hw_heartbeat_ms) {  in wdat_wdt_probe()
460 	ret = wdat_wdt_set_timeout(&wdat->wdd, timeout);  in wdat_wdt_probe()
464 	watchdog_set_nowayout(&wdat->wdd, nowayout);  in wdat_wdt_probe()
465 	watchdog_stop_on_reboot(&wdat->wdd);  in wdat_wdt_probe()
466 	return devm_watchdog_register_device(dev, &wdat->wdd);  in wdat_wdt_probe()
472 	struct wdat_wdt *wdat = dev_get_drvdata(dev);  in wdat_wdt_suspend_noirq()  local
475 	if (!watchdog_active(&wdat->wdd))  in wdat_wdt_suspend_noirq()
484 	wdat->stopped = false;  in wdat_wdt_suspend_noirq()
486 	    !wdat->stopped_in_sleep) {  in wdat_wdt_suspend_noirq()
487 		ret = wdat_wdt_stop(&wdat->wdd);  in wdat_wdt_suspend_noirq()
489 			wdat->stopped = true;  in wdat_wdt_suspend_noirq()
491 		ret = wdat_wdt_ping(&wdat->wdd);  in wdat_wdt_suspend_noirq()
499 	struct wdat_wdt *wdat = dev_get_drvdata(dev);  in wdat_wdt_resume_noirq()  local
502 	if (!watchdog_active(&wdat->wdd))  in wdat_wdt_resume_noirq()
505 	if (!wdat->stopped) {  in wdat_wdt_resume_noirq()
511 		ret = wdat_wdt_stop(&wdat->wdd);  in wdat_wdt_resume_noirq()
515 		ret = wdat_wdt_set_timeout(&wdat->wdd, wdat->wdd.timeout);  in wdat_wdt_resume_noirq()
519 		ret = wdat_wdt_enable_reboot(wdat);  in wdat_wdt_resume_noirq()
523 		ret = wdat_wdt_ping(&wdat->wdd);  in wdat_wdt_resume_noirq()
528 	return wdat_wdt_start(&wdat->wdd);  in wdat_wdt_resume_noirq()