52 static inline void brcmstb_waketmr_clear_alarm(struct brcmstb_waketmr *timer)  in brcmstb_waketmr_clear_alarm()  argument
54 	writel_relaxed(1, timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_clear_alarm()
55 	(void)readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_clear_alarm()
58 static void brcmstb_waketmr_set_alarm(struct brcmstb_waketmr *timer,  in brcmstb_waketmr_set_alarm()  argument
61 	brcmstb_waketmr_clear_alarm(timer);  in brcmstb_waketmr_set_alarm()
64 	writel_relaxed(timer->rate, timer->base + BRCMSTB_WKTMR_PRESCALER);  in brcmstb_waketmr_set_alarm()
66 	writel_relaxed(secs + 1, timer->base + BRCMSTB_WKTMR_ALARM);  in brcmstb_waketmr_set_alarm()
71 	struct brcmstb_waketmr *timer = data;  in brcmstb_waketmr_irq()  local
73 	pm_wakeup_event(timer->dev, 0);  in brcmstb_waketmr_irq()
83 static void wktmr_read(struct brcmstb_waketmr *timer,  in wktmr_read()  argument
89 		t->sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_COUNTER);  in wktmr_read()
90 		tmp = readl_relaxed(timer->base + BRCMSTB_WKTMR_PRESCALER_VAL);  in wktmr_read()
91 	} while (tmp >= timer->rate);  in wktmr_read()
93 	t->pre = timer->rate - tmp;  in wktmr_read()
96 static int brcmstb_waketmr_prepare_suspend(struct brcmstb_waketmr *timer)  in brcmstb_waketmr_prepare_suspend()  argument
98 	struct device *dev = timer->dev;  in brcmstb_waketmr_prepare_suspend()
102 		ret = enable_irq_wake(timer->irq);  in brcmstb_waketmr_prepare_suspend()
112 /* If enabled as a wakeup-source, arm the timer when powering off */
116 	struct brcmstb_waketmr *timer;  in brcmstb_waketmr_reboot()  local
118 	timer = container_of(nb, struct brcmstb_waketmr, reboot_notifier);  in brcmstb_waketmr_reboot()
120 	/* Set timer for cold boot */  in brcmstb_waketmr_reboot()
122 		brcmstb_waketmr_prepare_suspend(timer);  in brcmstb_waketmr_reboot()
130 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_gettime()  local
133 	wktmr_read(timer, &now);  in brcmstb_waketmr_gettime()
143 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_settime()  local
148 	writel_relaxed(sec, timer->base + BRCMSTB_WKTMR_COUNTER);  in brcmstb_waketmr_settime()
156 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_getalarm()  local
160 	sec = readl_relaxed(timer->base + BRCMSTB_WKTMR_ALARM);  in brcmstb_waketmr_getalarm()
167 	reg = readl_relaxed(timer->base + BRCMSTB_WKTMR_EVENT);  in brcmstb_waketmr_getalarm()
176 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_setalarm()  local
184 	brcmstb_waketmr_set_alarm(timer, sec);  in brcmstb_waketmr_setalarm()
210 	struct brcmstb_waketmr *timer;  in brcmstb_waketmr_probe()  local
214 	timer = devm_kzalloc(dev, sizeof(*timer), GFP_KERNEL);  in brcmstb_waketmr_probe()
215 	if (!timer)  in brcmstb_waketmr_probe()
218 	platform_set_drvdata(pdev, timer);  in brcmstb_waketmr_probe()
219 	timer->dev = dev;  in brcmstb_waketmr_probe()
222 	timer->base = devm_ioremap_resource(dev, res);  in brcmstb_waketmr_probe()
223 	if (IS_ERR(timer->base))  in brcmstb_waketmr_probe()
224 		return PTR_ERR(timer->base);  in brcmstb_waketmr_probe()
226 	timer->rtc = devm_rtc_allocate_device(dev);  in brcmstb_waketmr_probe()
227 	if (IS_ERR(timer->rtc))  in brcmstb_waketmr_probe()
228 		return PTR_ERR(timer->rtc);  in brcmstb_waketmr_probe()
237 	timer->irq = platform_get_irq(pdev, 0);  in brcmstb_waketmr_probe()
238 	if (timer->irq < 0)  in brcmstb_waketmr_probe()
241 	timer->clk = devm_clk_get(dev, NULL);  in brcmstb_waketmr_probe()
242 	if (!IS_ERR(timer->clk)) {  in brcmstb_waketmr_probe()
243 		ret = clk_prepare_enable(timer->clk);  in brcmstb_waketmr_probe()
246 		timer->rate = clk_get_rate(timer->clk);  in brcmstb_waketmr_probe()
247 		if (!timer->rate)  in brcmstb_waketmr_probe()
248 			timer->rate = BRCMSTB_WKTMR_DEFAULT_FREQ;  in brcmstb_waketmr_probe()
250 		timer->rate = BRCMSTB_WKTMR_DEFAULT_FREQ;  in brcmstb_waketmr_probe()
251 		timer->clk = NULL;  in brcmstb_waketmr_probe()
254 	ret = devm_request_irq(dev, timer->irq, brcmstb_waketmr_irq, 0,  in brcmstb_waketmr_probe()
255 			       "brcmstb-waketimer", timer);  in brcmstb_waketmr_probe()
259 	timer->reboot_notifier.notifier_call = brcmstb_waketmr_reboot;  in brcmstb_waketmr_probe()
260 	register_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_probe()
262 	timer->rtc->ops = &brcmstb_waketmr_ops;  in brcmstb_waketmr_probe()
263 	timer->rtc->range_max = U32_MAX;  in brcmstb_waketmr_probe()
265 	ret = rtc_register_device(timer->rtc);  in brcmstb_waketmr_probe()
271 	dev_info(dev, "registered, with irq %d\n", timer->irq);  in brcmstb_waketmr_probe()
276 	unregister_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_probe()
279 	if (timer->clk)  in brcmstb_waketmr_probe()
280 		clk_disable_unprepare(timer->clk);  in brcmstb_waketmr_probe()
287 	struct brcmstb_waketmr *timer = dev_get_drvdata(&pdev->dev);  in brcmstb_waketmr_remove()  local
289 	unregister_reboot_notifier(&timer->reboot_notifier);  in brcmstb_waketmr_remove()
290 	clk_disable_unprepare(timer->clk);  in brcmstb_waketmr_remove()
298 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_suspend()  local
300 	return brcmstb_waketmr_prepare_suspend(timer);  in brcmstb_waketmr_suspend()
305 	struct brcmstb_waketmr *timer = dev_get_drvdata(dev);  in brcmstb_waketmr_resume()  local
311 	ret = disable_irq_wake(timer->irq);  in brcmstb_waketmr_resume()
313 	brcmstb_waketmr_clear_alarm(timer);  in brcmstb_waketmr_resume()
341 MODULE_DESCRIPTION("Wake-up timer driver for STB chips");