drivers/watchdog/rti_wdt.c

81 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
89 	timer_margin = (u64)wdd->timeout * wdt->freq;
93 	writel_relaxed(timer_margin, wdt->base + RTIDWDPRLD);
104 	/* Generate NMI when wdt expires */
105 	writel_relaxed(RTIWWDRX_NMI, wdt->base + RTIWWDRXCTRL);
108 	writel_relaxed(RTIWWDSIZE_50P, wdt->base + RTIWWDSIZECTRL);
110 	readl_relaxed(wdt->base + RTIWWDSIZECTRL);
113 	writel_relaxed(WDENABLE_KEY, wdt->base + RTIDWDCTRL);
119 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
122 	writel_relaxed(WDKEY_SEQ0, wdt->base + RTIWDKEY);
124 	writel_relaxed(WDKEY_SEQ1, wdt->base + RTIWDKEY);
176 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);
179 	val = readl_relaxed(wdt->base + RTIWDSTATUS);
183 	timer_counter = readl_relaxed(wdt->base + RTIDWDCNTR);
187 	do_div(timer_counter, wdt->freq);
214 	struct rti_wdt_device *wdt;
223 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
224 	if (!wdt)
231 	wdt->freq = clk_get_rate(clk);
235 	if (!wdt->freq) {
247 	platform_set_drvdata(pdev, wdt);
249 	wdd = &wdt->wdd;
254 		wdt->freq * 1000;
257 	watchdog_set_drvdata(wdd, wdt);
261 	wdt->base = devm_platform_ioremap_resource(pdev, 0);
262 	if (IS_ERR(wdt->base)) {
263 		ret = PTR_ERR(wdt->base);
267 	if (readl(wdt->base + RTIDWDCTRL) == WDENABLE_KEY) {
275 		heartbeat_ms = readl(wdt->base + RTIDWDPRLD);
278 		do_div(heartbeat_ms, wdt->freq);
286 		wsize = readl(wdt->base + RTIWWDSIZECTRL);
361 	struct rti_wdt_device *wdt = platform_get_drvdata(pdev);
363 	watchdog_unregister_device(&wdt->wdd);
372 	{ .compatible = "ti,j7-rti-wdt", },
379 		.name = "rti-wdt",
398 MODULE_ALIAS("platform:rti-wdt");