146 static int starfive_wdt_enable_clock(struct starfive_wdt *wdt)  in starfive_wdt_enable_clock()  argument
150 	ret = clk_prepare_enable(wdt->apb_clk);  in starfive_wdt_enable_clock()
152 		return dev_err_probe(wdt->wdd.parent, ret, "failed to enable apb clock\n");  in starfive_wdt_enable_clock()
154 	ret = clk_prepare_enable(wdt->core_clk);  in starfive_wdt_enable_clock()
156 		return dev_err_probe(wdt->wdd.parent, ret, "failed to enable core clock\n");  in starfive_wdt_enable_clock()
161 static void starfive_wdt_disable_clock(struct starfive_wdt *wdt)  in starfive_wdt_disable_clock()  argument
163 	clk_disable_unprepare(wdt->core_clk);  in starfive_wdt_disable_clock()
164 	clk_disable_unprepare(wdt->apb_clk);  in starfive_wdt_disable_clock()
167 static inline int starfive_wdt_get_clock(struct starfive_wdt *wdt)  in starfive_wdt_get_clock()  argument
169 	struct device *dev = wdt->wdd.parent;  in starfive_wdt_get_clock()
171 	wdt->apb_clk = devm_clk_get(dev, "apb");  in starfive_wdt_get_clock()
172 	if (IS_ERR(wdt->apb_clk))  in starfive_wdt_get_clock()
173 		return dev_err_probe(dev, PTR_ERR(wdt->apb_clk), "failed to get apb clock\n");  in starfive_wdt_get_clock()
175 	wdt->core_clk = devm_clk_get(dev, "core");  in starfive_wdt_get_clock()
176 	if (IS_ERR(wdt->core_clk))  in starfive_wdt_get_clock()
177 		return dev_err_probe(dev, PTR_ERR(wdt->core_clk), "failed to get core clock\n");  in starfive_wdt_get_clock()
198 static u32 starfive_wdt_ticks_to_sec(struct starfive_wdt *wdt, u32 ticks)  in starfive_wdt_ticks_to_sec()  argument
200 	return DIV_ROUND_CLOSEST(ticks, wdt->freq);  in starfive_wdt_ticks_to_sec()
204 static void starfive_wdt_unlock(struct starfive_wdt *wdt)  in starfive_wdt_unlock()  argument
206 	spin_lock(&wdt->lock);  in starfive_wdt_unlock()
207 	writel(wdt->variant->unlock_key, wdt->base + wdt->variant->unlock);  in starfive_wdt_unlock()
210 static void starfive_wdt_lock(struct starfive_wdt *wdt)  in starfive_wdt_lock()  argument
212 	writel(~wdt->variant->unlock_key, wdt->base + wdt->variant->unlock);  in starfive_wdt_lock()
213 	spin_unlock(&wdt->lock);  in starfive_wdt_lock()
217 static void starfive_wdt_enable_reset(struct starfive_wdt *wdt)  in starfive_wdt_enable_reset()  argument
221 	val = readl(wdt->base + wdt->variant->control);  in starfive_wdt_enable_reset()
222 	val |= STARFIVE_WDT_RESET_EN << wdt->variant->enrst_shift;  in starfive_wdt_enable_reset()
223 	writel(val, wdt->base + wdt->variant->control);  in starfive_wdt_enable_reset()
227 static bool starfive_wdt_raise_irq_status(struct starfive_wdt *wdt)  in starfive_wdt_raise_irq_status()  argument
229 	return !!readl(wdt->base + wdt->variant->int_status);  in starfive_wdt_raise_irq_status()
233 static int starfive_wdt_wait_int_free(struct starfive_wdt *wdt)  in starfive_wdt_wait_int_free()  argument
237 	return readl_poll_timeout_atomic(wdt->base + wdt->variant->int_clr, value,  in starfive_wdt_wait_int_free()
238 					 !(value & BIT(wdt->variant->intclr_ava_shift)),  in starfive_wdt_wait_int_free()
243 static int starfive_wdt_int_clr(struct starfive_wdt *wdt)  in starfive_wdt_int_clr()  argument
247 	if (wdt->variant->intclr_check) {  in starfive_wdt_int_clr()
248 		ret = starfive_wdt_wait_int_free(wdt);  in starfive_wdt_int_clr()
250 			return dev_err_probe(wdt->wdd.parent, ret,  in starfive_wdt_int_clr()
253 	writel(STARFIVE_WDT_INTCLR, wdt->base + wdt->variant->int_clr);  in starfive_wdt_int_clr()
258 static inline void starfive_wdt_set_count(struct starfive_wdt *wdt, u32 val)  in starfive_wdt_set_count()  argument
260 	writel(val, wdt->base + wdt->variant->load);  in starfive_wdt_set_count()
263 static inline u32 starfive_wdt_get_count(struct starfive_wdt *wdt)  in starfive_wdt_get_count()  argument
265 	return readl(wdt->base + wdt->variant->value);  in starfive_wdt_get_count()
269 static inline void starfive_wdt_enable(struct starfive_wdt *wdt)  in starfive_wdt_enable()  argument
273 	val = readl(wdt->base + wdt->variant->enable);  in starfive_wdt_enable()
274 	val |= STARFIVE_WDT_ENABLE << wdt->variant->en_shift;  in starfive_wdt_enable()
275 	writel(val, wdt->base + wdt->variant->enable);  in starfive_wdt_enable()
279 static inline void starfive_wdt_disable(struct starfive_wdt *wdt)  in starfive_wdt_disable()  argument
283 	val = readl(wdt->base + wdt->variant->enable);  in starfive_wdt_disable()
284 	val &= ~(STARFIVE_WDT_ENABLE << wdt->variant->en_shift);  in starfive_wdt_disable()
285 	writel(val, wdt->base + wdt->variant->enable);  in starfive_wdt_disable()
288 static inline void starfive_wdt_set_reload_count(struct starfive_wdt *wdt, u32 count)  in starfive_wdt_set_reload_count()  argument
290 	starfive_wdt_set_count(wdt, count);  in starfive_wdt_set_reload_count()
293 	if (wdt->variant->reload)  in starfive_wdt_set_reload_count()
294 		writel(0x1, wdt->base + wdt->variant->reload);  in starfive_wdt_set_reload_count()
297 static unsigned int starfive_wdt_max_timeout(struct starfive_wdt *wdt)  in starfive_wdt_max_timeout()  argument
299 	if (wdt->variant->double_timeout)  in starfive_wdt_max_timeout()
300 		return DIV_ROUND_UP(STARFIVE_WDT_MAXCNT, (wdt->freq / 2)) - 1;  in starfive_wdt_max_timeout()
302 	return DIV_ROUND_UP(STARFIVE_WDT_MAXCNT, wdt->freq) - 1;  in starfive_wdt_max_timeout()
307 	struct starfive_wdt *wdt = watchdog_get_drvdata(wdd);  in starfive_wdt_get_timeleft()  local
314 	count = starfive_wdt_get_count(wdt);  in starfive_wdt_get_timeleft()
315 	if (wdt->variant->double_timeout && !starfive_wdt_raise_irq_status(wdt))  in starfive_wdt_get_timeleft()
316 		count += wdt->count;  in starfive_wdt_get_timeleft()
318 	return starfive_wdt_ticks_to_sec(wdt, count);  in starfive_wdt_get_timeleft()
323 	struct starfive_wdt *wdt = watchdog_get_drvdata(wdd);  in starfive_wdt_keepalive()  local
326 	starfive_wdt_unlock(wdt);  in starfive_wdt_keepalive()
327 	ret = starfive_wdt_int_clr(wdt);  in starfive_wdt_keepalive()
331 	starfive_wdt_set_reload_count(wdt, wdt->count);  in starfive_wdt_keepalive()
335 	starfive_wdt_lock(wdt);  in starfive_wdt_keepalive()
339 static int starfive_wdt_start(struct starfive_wdt *wdt)  in starfive_wdt_start()  argument
343 	starfive_wdt_unlock(wdt);  in starfive_wdt_start()
345 	starfive_wdt_disable(wdt);  in starfive_wdt_start()
347 	starfive_wdt_enable_reset(wdt);  in starfive_wdt_start()
348 	ret = starfive_wdt_int_clr(wdt);  in starfive_wdt_start()
352 	starfive_wdt_set_count(wdt, wdt->count);  in starfive_wdt_start()
353 	starfive_wdt_enable(wdt);  in starfive_wdt_start()
356 	starfive_wdt_lock(wdt);  in starfive_wdt_start()
360 static void starfive_wdt_stop(struct starfive_wdt *wdt)  in starfive_wdt_stop()  argument
362 	starfive_wdt_unlock(wdt);  in starfive_wdt_stop()
363 	starfive_wdt_disable(wdt);  in starfive_wdt_stop()
364 	starfive_wdt_lock(wdt);  in starfive_wdt_stop()
369 	struct starfive_wdt *wdt = watchdog_get_drvdata(wdd);  in starfive_wdt_pm_start()  local
375 	return starfive_wdt_start(wdt);  in starfive_wdt_pm_start()
380 	struct starfive_wdt *wdt = watchdog_get_drvdata(wdd);  in starfive_wdt_pm_stop()  local
382 	starfive_wdt_stop(wdt);  in starfive_wdt_pm_stop()
389 	struct starfive_wdt *wdt = watchdog_get_drvdata(wdd);  in starfive_wdt_set_timeout()  local
390 	unsigned long count = timeout * wdt->freq;  in starfive_wdt_set_timeout()
393 	if (wdt->variant->double_timeout)  in starfive_wdt_set_timeout()
396 	wdt->count = count;  in starfive_wdt_set_timeout()
399 	starfive_wdt_unlock(wdt);  in starfive_wdt_set_timeout()
400 	starfive_wdt_disable(wdt);  in starfive_wdt_set_timeout()
401 	starfive_wdt_set_reload_count(wdt, wdt->count);  in starfive_wdt_set_timeout()
402 	starfive_wdt_enable(wdt);  in starfive_wdt_set_timeout()
403 	starfive_wdt_lock(wdt);  in starfive_wdt_set_timeout()
426 	struct starfive_wdt *wdt;  in starfive_wdt_probe()  local
429 	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);  in starfive_wdt_probe()
430 	if (!wdt)  in starfive_wdt_probe()
433 	wdt->base = devm_platform_ioremap_resource(pdev, 0);  in starfive_wdt_probe()
434 	if (IS_ERR(wdt->base))  in starfive_wdt_probe()
435 		return dev_err_probe(&pdev->dev, PTR_ERR(wdt->base), "error mapping registers\n");  in starfive_wdt_probe()
437 	wdt->wdd.parent = &pdev->dev;  in starfive_wdt_probe()
438 	ret = starfive_wdt_get_clock(wdt);  in starfive_wdt_probe()
442 	platform_set_drvdata(pdev, wdt);  in starfive_wdt_probe()
450 		ret = starfive_wdt_enable_clock(wdt);  in starfive_wdt_probe()
459 	watchdog_set_drvdata(&wdt->wdd, wdt);  in starfive_wdt_probe()
460 	wdt->wdd.info = &starfive_wdt_info;  in starfive_wdt_probe()
461 	wdt->wdd.ops = &starfive_wdt_ops;  in starfive_wdt_probe()
462 	wdt->variant = of_device_get_match_data(&pdev->dev);  in starfive_wdt_probe()
463 	spin_lock_init(&wdt->lock);  in starfive_wdt_probe()
465 	wdt->freq = clk_get_rate(wdt->core_clk);  in starfive_wdt_probe()
466 	if (!wdt->freq) {  in starfive_wdt_probe()
472 	wdt->wdd.min_timeout = 1;  in starfive_wdt_probe()
473 	wdt->wdd.max_timeout = starfive_wdt_max_timeout(wdt);  in starfive_wdt_probe()
474 	wdt->wdd.timeout = STARFIVE_WDT_DEFAULT_TIME;  in starfive_wdt_probe()
475 	watchdog_init_timeout(&wdt->wdd, heartbeat, &pdev->dev);  in starfive_wdt_probe()
476 	starfive_wdt_set_timeout(&wdt->wdd, wdt->wdd.timeout);  in starfive_wdt_probe()
478 	watchdog_set_nowayout(&wdt->wdd, nowayout);  in starfive_wdt_probe()
479 	watchdog_stop_on_reboot(&wdt->wdd);  in starfive_wdt_probe()
480 	watchdog_stop_on_unregister(&wdt->wdd);  in starfive_wdt_probe()
483 		ret = starfive_wdt_start(wdt);  in starfive_wdt_probe()
486 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);  in starfive_wdt_probe()
488 		starfive_wdt_stop(wdt);  in starfive_wdt_probe()
491 	ret = watchdog_register_device(&wdt->wdd);  in starfive_wdt_probe()
501 	starfive_wdt_disable_clock(wdt);  in starfive_wdt_probe()
509 	struct starfive_wdt *wdt = platform_get_drvdata(pdev);  in starfive_wdt_remove()  local
511 	starfive_wdt_stop(wdt);  in starfive_wdt_remove()
512 	watchdog_unregister_device(&wdt->wdd);  in starfive_wdt_remove()
518 		starfive_wdt_disable_clock(wdt);  in starfive_wdt_remove()
525 	struct starfive_wdt *wdt = platform_get_drvdata(pdev);  in starfive_wdt_shutdown()  local
527 	starfive_wdt_pm_stop(&wdt->wdd);  in starfive_wdt_shutdown()
532 	struct starfive_wdt *wdt = dev_get_drvdata(dev);  in starfive_wdt_suspend()  local
535 	wdt->reload = starfive_wdt_get_count(wdt);  in starfive_wdt_suspend()
538 	starfive_wdt_stop(wdt);  in starfive_wdt_suspend()
545 	struct starfive_wdt *wdt = dev_get_drvdata(dev);  in starfive_wdt_resume()  local
552 	starfive_wdt_unlock(wdt);  in starfive_wdt_resume()
554 	starfive_wdt_set_reload_count(wdt, wdt->reload);  in starfive_wdt_resume()
555 	starfive_wdt_lock(wdt);  in starfive_wdt_resume()
557 	return starfive_wdt_start(wdt);  in starfive_wdt_resume()
562 	struct starfive_wdt *wdt = dev_get_drvdata(dev);  in starfive_wdt_runtime_suspend()  local
564 	starfive_wdt_disable_clock(wdt);  in starfive_wdt_runtime_suspend()
571 	struct starfive_wdt *wdt = dev_get_drvdata(dev);  in starfive_wdt_runtime_resume()  local
573 	return starfive_wdt_enable_clock(wdt);  in starfive_wdt_runtime_resume()
582 	{ .compatible = "starfive,jh7100-wdt", .data = &starfive_wdt_jh7100_variant },
583 	{ .compatible = "starfive,jh7110-wdt", .data = &starfive_wdt_jh7110_variant },
593 		.name = "starfive-wdt",