49 static inline bool brcmstb_waketmr_is_pending(struct brcmstb_waketmr *timer)  in brcmstb_waketmr_is_pending()  argument
53 	reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_is_pending()
57 static inline void brcmstb_waketmr_clear_alarm(struct brcmstb_waketmr *timer)  in brcmstb_waketmr_clear_alarm()  argument
61 	if (timer->alarm_en && timer->alarm_irq)  in brcmstb_waketmr_clear_alarm()
62 		disable_irq(timer->alarm_irq);  in brcmstb_waketmr_clear_alarm()
63 	timer->alarm_en = false;  in brcmstb_waketmr_clear_alarm()
64 	reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);  in brcmstb_waketmr_clear_alarm()
65 	writel_relaxed(reg - 1, timer->base + BRCMSTB_WKTMR_ALARM);  in brcmstb_waketmr_clear_alarm()
66 	writel_relaxed(WKTMR_ALARM_EVENT, timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_clear_alarm()
67 	(void)readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_clear_alarm()
68 	if (timer->alarm_expired) {  in brcmstb_waketmr_clear_alarm()
69 		timer->alarm_expired = false;  in brcmstb_waketmr_clear_alarm()
71 		enable_irq(timer->alarm_irq);  in brcmstb_waketmr_clear_alarm()
75 static void brcmstb_waketmr_set_alarm(struct brcmstb_waketmr *timer,  in brcmstb_waketmr_set_alarm()  argument
80 	brcmstb_waketmr_clear_alarm(timer);  in brcmstb_waketmr_set_alarm()
83 	writel_relaxed(timer->rate, timer->base + BRCMSTB_WKTMR_PRESCALER);  in brcmstb_waketmr_set_alarm()
85 	writel_relaxed(secs, timer->base + BRCMSTB_WKTMR_ALARM);  in brcmstb_waketmr_set_alarm()
86 	now = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);  in brcmstb_waketmr_set_alarm()
89 		!brcmstb_waketmr_is_pending(timer)) {  in brcmstb_waketmr_set_alarm()
91 		writel_relaxed(secs, timer->base + BRCMSTB_WKTMR_ALARM);  in brcmstb_waketmr_set_alarm()
92 		now = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);  in brcmstb_waketmr_set_alarm()
98 	struct brcmstb_waketmr *timer = data;  in brcmstb_waketmr_irq()  local
100 	if (!timer->alarm_irq)  in brcmstb_waketmr_irq()
101 		pm_wakeup_event(timer->dev, 0);  in brcmstb_waketmr_irq()
107 	struct brcmstb_waketmr *timer = data;  in brcmstb_alarm_irq()  local
110 	if (!brcmstb_waketmr_is_pending(timer))  in brcmstb_alarm_irq()
113 	if (timer->alarm_en) {  in brcmstb_alarm_irq()
114 		if (device_may_wakeup(timer->dev)) {  in brcmstb_alarm_irq()
116 			timer->alarm_expired = true;  in brcmstb_alarm_irq()
119 				       timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_alarm_irq()
121 		rtc_update_irq(timer->rtc, 1, RTC_IRQF | RTC_AF);  in brcmstb_alarm_irq()
124 			       timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_alarm_irq()
135 static void wktmr_read(struct brcmstb_waketmr *timer,  in wktmr_read()  argument
141 		t->sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);  in wktmr_read()
142 		tmp = readl_relaxed(timer->base + BRCMSTB_WKTMR_PRESCALER_VAL);  in wktmr_read()
143 	} while (tmp >= timer->rate);  in wktmr_read()
145 	t->pre = timer->rate - tmp;  in wktmr_read()
148 static int brcmstb_waketmr_prepare_suspend(struct brcmstb_waketmr *timer)  in brcmstb_waketmr_prepare_suspend()  argument
150 	struct device *dev = timer->dev;  in brcmstb_waketmr_prepare_suspend()
154 		ret = enable_irq_wake(timer->wake_irq);  in brcmstb_waketmr_prepare_suspend()
159 		if (timer->alarm_en && timer->alarm_irq) {  in brcmstb_waketmr_prepare_suspend()
160 			ret = enable_irq_wake(timer->alarm_irq);  in brcmstb_waketmr_prepare_suspend()
163 				disable_irq_wake(timer->wake_irq);  in brcmstb_waketmr_prepare_suspend()
172 /* If enabled as a wakeup-source, arm the timer when powering off */
176 	struct brcmstb_waketmr *timer;  in brcmstb_waketmr_reboot()  local
178 	timer = container_of(nb, struct brcmstb_waketmr, reboot_notifier);  in brcmstb_waketmr_reboot()
180 	/* Set timer for cold boot */  in brcmstb_waketmr_reboot()
182 		brcmstb_waketmr_prepare_suspend(timer);  in brcmstb_waketmr_reboot()
190 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_gettime()  local
193 	wktmr_read(timer, &now);  in brcmstb_waketmr_gettime()
203 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_settime()  local
208 	writel_relaxed(sec, timer->base + BRCMSTB_WKTMR_COUNTER);  in brcmstb_waketmr_settime()
216 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_getalarm()  local
218 	alarm->enabled = timer->alarm_en;  in brcmstb_waketmr_getalarm()
219 	rtc_time64_to_tm(timer->rtc_alarm, &alarm->time);  in brcmstb_waketmr_getalarm()
221 	alarm->pending = brcmstb_waketmr_is_pending(timer);  in brcmstb_waketmr_getalarm()
229 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_alarm_enable()  local
231 	if (enabled && !timer->alarm_en) {  in brcmstb_waketmr_alarm_enable()
232 		if ((int)(readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER) -  in brcmstb_waketmr_alarm_enable()
233 		    readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM)) >= 0 &&  in brcmstb_waketmr_alarm_enable()
234 		    !brcmstb_waketmr_is_pending(timer))  in brcmstb_waketmr_alarm_enable()
236 		timer->alarm_en = true;  in brcmstb_waketmr_alarm_enable()
237 		if (timer->alarm_irq) {  in brcmstb_waketmr_alarm_enable()
238 			if (timer->alarm_expired) {  in brcmstb_waketmr_alarm_enable()
239 				timer->alarm_expired = false;  in brcmstb_waketmr_alarm_enable()
241 				enable_irq(timer->alarm_irq);  in brcmstb_waketmr_alarm_enable()
243 			enable_irq(timer->alarm_irq);  in brcmstb_waketmr_alarm_enable()
245 	} else if (!enabled && timer->alarm_en) {  in brcmstb_waketmr_alarm_enable()
246 		if (timer->alarm_irq)  in brcmstb_waketmr_alarm_enable()
247 			disable_irq(timer->alarm_irq);  in brcmstb_waketmr_alarm_enable()
248 		timer->alarm_en = false;  in brcmstb_waketmr_alarm_enable()
257 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_setalarm()  local
259 	timer->rtc_alarm = rtc_tm_to_time64(&alarm->time);  in brcmstb_waketmr_setalarm()
261 	brcmstb_waketmr_set_alarm(timer, timer->rtc_alarm);  in brcmstb_waketmr_setalarm()
277 	struct brcmstb_waketmr *timer;  in brcmstb_waketmr_probe()  local
280 	timer = devm_kzalloc(dev, sizeof(*timer), GFP_KERNEL);  in brcmstb_waketmr_probe()
281 	if (!timer)  in brcmstb_waketmr_probe()
284 	platform_set_drvdata(pdev, timer);  in brcmstb_waketmr_probe()
285 	timer->dev = dev;  in brcmstb_waketmr_probe()
287 	timer->base = devm_platform_ioremap_resource(pdev, 0);  in brcmstb_waketmr_probe()
288 	if (IS_ERR(timer->base))  in brcmstb_waketmr_probe()
289 		return PTR_ERR(timer->base);  in brcmstb_waketmr_probe()
291 	timer->rtc = devm_rtc_allocate_device(dev);  in brcmstb_waketmr_probe()
292 	if (IS_ERR(timer->rtc))  in brcmstb_waketmr_probe()
293 		return PTR_ERR(timer->rtc);  in brcmstb_waketmr_probe()
304 	timer->wake_irq = (unsigned int)ret;  in brcmstb_waketmr_probe()
306 	timer->clk = devm_clk_get(dev, NULL);  in brcmstb_waketmr_probe()
307 	if (!IS_ERR(timer->clk)) {  in brcmstb_waketmr_probe()
308 		ret = clk_prepare_enable(timer->clk);  in brcmstb_waketmr_probe()
311 		timer->rate = clk_get_rate(timer->clk);  in brcmstb_waketmr_probe()
312 		if (!timer->rate)  in brcmstb_waketmr_probe()
313 			timer->rate = BRCMSTB_WKTMR_DEFAULT_FREQ;  in brcmstb_waketmr_probe()
315 		timer->rate = BRCMSTB_WKTMR_DEFAULT_FREQ;  in brcmstb_waketmr_probe()
316 		timer->clk = NULL;  in brcmstb_waketmr_probe()
319 	ret = devm_request_irq(dev, timer->wake_irq, brcmstb_waketmr_irq, 0,  in brcmstb_waketmr_probe()
320 			       "brcmstb-waketimer", timer);  in brcmstb_waketmr_probe()
324 	brcmstb_waketmr_clear_alarm(timer);  in brcmstb_waketmr_probe()
329 		timer->alarm_irq = (unsigned int)ret;  in brcmstb_waketmr_probe()
330 		ret = devm_request_irq(dev, timer->alarm_irq, brcmstb_alarm_irq,  in brcmstb_waketmr_probe()
332 				       timer);  in brcmstb_waketmr_probe()
334 			timer->alarm_irq = 0;  in brcmstb_waketmr_probe()
337 	timer->reboot_notifier.notifier_call = brcmstb_waketmr_reboot;  in brcmstb_waketmr_probe()
338 	register_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_probe()
340 	timer->rtc->ops = &brcmstb_waketmr_ops;  in brcmstb_waketmr_probe()
341 	timer->rtc->range_max = U32_MAX;  in brcmstb_waketmr_probe()
343 	ret = devm_rtc_register_device(timer->rtc);  in brcmstb_waketmr_probe()
350 	unregister_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_probe()
353 	clk_disable_unprepare(timer->clk);  in brcmstb_waketmr_probe()
360 	struct brcmstb_waketmr *timer = dev_get_drvdata(&pdev->dev);  in brcmstb_waketmr_remove()  local
362 	unregister_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_remove()
363 	clk_disable_unprepare(timer->clk);  in brcmstb_waketmr_remove()
369 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_suspend()  local
371 	return brcmstb_waketmr_prepare_suspend(timer);  in brcmstb_waketmr_suspend()
376 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_suspend_noirq()  local
379 	if (timer->alarm_expired && device_may_wakeup(dev))  in brcmstb_waketmr_suspend_noirq()
387 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_resume()  local
393 	ret = disable_irq_wake(timer->wake_irq);  in brcmstb_waketmr_resume()
394 	if (timer->alarm_en && timer->alarm_irq)  in brcmstb_waketmr_resume()
395 		disable_irq_wake(timer->alarm_irq);  in brcmstb_waketmr_resume()
397 	brcmstb_waketmr_clear_alarm(timer);  in brcmstb_waketmr_resume()
433 MODULE_DESCRIPTION("Wake-up timer driver for STB chips");