91 static inline void cdns_wdt_writereg(struct cdns_wdt *wdt, u32 offset, u32 val)  in cdns_wdt_writereg()  argument
93 	writel_relaxed(val, wdt->regs + offset);  in cdns_wdt_writereg()
132 	struct cdns_wdt *wdt = watchdog_get_drvdata(wdd);  in cdns_wdt_stop()  local
134 	spin_lock(&wdt->io_lock);  in cdns_wdt_stop()
135 	cdns_wdt_writereg(wdt, CDNS_WDT_ZMR_OFFSET,  in cdns_wdt_stop()
137 	spin_unlock(&wdt->io_lock);  in cdns_wdt_stop()
153 	struct cdns_wdt *wdt = watchdog_get_drvdata(wdd);  in cdns_wdt_reload()  local
155 	spin_lock(&wdt->io_lock);  in cdns_wdt_reload()
156 	cdns_wdt_writereg(wdt, CDNS_WDT_RESTART_OFFSET,  in cdns_wdt_reload()
158 	spin_unlock(&wdt->io_lock);  in cdns_wdt_reload()
183 	struct cdns_wdt *wdt = watchdog_get_drvdata(wdd);  in cdns_wdt_start()  local
186 	unsigned long clock_f = clk_get_rate(wdt->clk);  in cdns_wdt_start()
192 	count = (wdd->timeout * (clock_f / wdt->prescaler)) /  in cdns_wdt_start()
198 	spin_lock(&wdt->io_lock);  in cdns_wdt_start()
199 	cdns_wdt_writereg(wdt, CDNS_WDT_ZMR_OFFSET,  in cdns_wdt_start()
205 	data = count | CDNS_WDT_REGISTER_ACCESS_KEY | wdt->ctrl_clksel;  in cdns_wdt_start()
206 	cdns_wdt_writereg(wdt, CDNS_WDT_CCR_OFFSET, data);  in cdns_wdt_start()
211 	if (wdt->rst) {  in cdns_wdt_start()
218 	cdns_wdt_writereg(wdt, CDNS_WDT_ZMR_OFFSET, data);  in cdns_wdt_start()
219 	cdns_wdt_writereg(wdt, CDNS_WDT_RESTART_OFFSET,  in cdns_wdt_start()
221 	spin_unlock(&wdt->io_lock);  in cdns_wdt_start()
298 	struct cdns_wdt *wdt = container_of(this, struct cdns_wdt,  in cdns_wdt_notify_sys()  local
301 		cdns_wdt_stop(&wdt->cdns_wdt_device);  in cdns_wdt_notify_sys()
320 	struct cdns_wdt *wdt;  in cdns_wdt_probe()  local
323 	wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);  in cdns_wdt_probe()
324 	if (!wdt)  in cdns_wdt_probe()
327 	cdns_wdt_device = &wdt->cdns_wdt_device;  in cdns_wdt_probe()
335 	wdt->regs = devm_ioremap_resource(&pdev->dev, res);  in cdns_wdt_probe()
336 	if (IS_ERR(wdt->regs))  in cdns_wdt_probe()
337 		return PTR_ERR(wdt->regs);  in cdns_wdt_probe()
340 	wdt->rst = of_property_read_bool(pdev->dev.of_node, "reset-on-timeout");  in cdns_wdt_probe()
342 	if (!wdt->rst && irq >= 0) {  in cdns_wdt_probe()
363 	watchdog_set_drvdata(cdns_wdt_device, wdt);  in cdns_wdt_probe()
365 	wdt->clk = devm_clk_get(&pdev->dev, NULL);  in cdns_wdt_probe()
366 	if (IS_ERR(wdt->clk)) {  in cdns_wdt_probe()
368 		ret = PTR_ERR(wdt->clk);  in cdns_wdt_probe()
372 	ret = clk_prepare_enable(wdt->clk);  in cdns_wdt_probe()
378 	clock_f = clk_get_rate(wdt->clk);  in cdns_wdt_probe()
380 		wdt->prescaler = CDNS_WDT_PRESCALE_512;  in cdns_wdt_probe()
381 		wdt->ctrl_clksel = CDNS_WDT_PRESCALE_SELECT_512;  in cdns_wdt_probe()
383 		wdt->prescaler = CDNS_WDT_PRESCALE_4096;  in cdns_wdt_probe()
384 		wdt->ctrl_clksel = CDNS_WDT_PRESCALE_SELECT_4096;  in cdns_wdt_probe()
387 	spin_lock_init(&wdt->io_lock);  in cdns_wdt_probe()
389 	wdt->cdns_wdt_notifier.notifier_call = &cdns_wdt_notify_sys;  in cdns_wdt_probe()
390 	ret = register_reboot_notifier(&wdt->cdns_wdt_notifier);  in cdns_wdt_probe()
402 	platform_set_drvdata(pdev, wdt);  in cdns_wdt_probe()
405 		 wdt->regs, cdns_wdt_device->timeout,  in cdns_wdt_probe()
411 	clk_disable_unprepare(wdt->clk);  in cdns_wdt_probe()
426 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);  in cdns_wdt_remove()  local
428 	cdns_wdt_stop(&wdt->cdns_wdt_device);  in cdns_wdt_remove()
429 	watchdog_unregister_device(&wdt->cdns_wdt_device);  in cdns_wdt_remove()
430 	unregister_reboot_notifier(&wdt->cdns_wdt_notifier);  in cdns_wdt_remove()
431 	clk_disable_unprepare(wdt->clk);  in cdns_wdt_remove()
444 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);  in cdns_wdt_shutdown()  local
446 	cdns_wdt_stop(&wdt->cdns_wdt_device);  in cdns_wdt_shutdown()
447 	clk_disable_unprepare(wdt->clk);  in cdns_wdt_shutdown()
460 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);  in cdns_wdt_suspend()  local
462 	cdns_wdt_stop(&wdt->cdns_wdt_device);  in cdns_wdt_suspend()
463 	clk_disable_unprepare(wdt->clk);  in cdns_wdt_suspend()
479 	struct cdns_wdt *wdt = platform_get_drvdata(pdev);  in cdns_wdt_resume()  local
481 	ret = clk_prepare_enable(wdt->clk);  in cdns_wdt_resume()
486 	cdns_wdt_start(&wdt->cdns_wdt_device);  in cdns_wdt_resume()