58  * struct to hold data for each WDT device
60  * @freq - source clock frequency of WDT
61  * @wdd  - hold watchdog device as is in WDT core
72 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);  in rti_wdt_start()  local
75 	timer_margin = (u64)wdd->timeout * wdt->freq;  in rti_wdt_start()
79 	writel_relaxed(timer_margin, wdt->base + RTIDWDPRLD);  in rti_wdt_start()
90 	/* Generate NMI when wdt expires */  in rti_wdt_start()
91 	writel_relaxed(RTIWWDRX_NMI, wdt->base + RTIWWDRXCTRL);  in rti_wdt_start()
94 	writel_relaxed(RTIWWDSIZE_50P, wdt->base + RTIWWDSIZECTRL);  in rti_wdt_start()
96 	readl_relaxed(wdt->base + RTIWWDSIZECTRL);  in rti_wdt_start()
99 	writel_relaxed(WDENABLE_KEY, wdt->base + RTIDWDCTRL);  in rti_wdt_start()
105 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);  in rti_wdt_ping()  local
108 	writel_relaxed(WDKEY_SEQ0, wdt->base + RTIWDKEY);  in rti_wdt_ping()
110 	writel_relaxed(WDKEY_SEQ1, wdt->base + RTIWDKEY);  in rti_wdt_ping()
160 	struct rti_wdt_device *wdt = watchdog_get_drvdata(wdd);  in rti_wdt_get_timeleft_ms()  local
163 	val = readl_relaxed(wdt->base + RTIWDSTATUS);  in rti_wdt_get_timeleft_ms()
167 	timer_counter = readl_relaxed(wdt->base + RTIDWDCNTR);  in rti_wdt_get_timeleft_ms()
171 	do_div(timer_counter, wdt->freq);  in rti_wdt_get_timeleft_ms()
199 	struct rti_wdt_device *wdt;  in rti_wdt_probe()  local
203 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in rti_wdt_probe()
204 	if (!wdt)  in rti_wdt_probe()
211 	wdt->freq = clk_get_rate(clk);  in rti_wdt_probe()
215 	if (!wdt->freq) {  in rti_wdt_probe()
225 	if (wdt->freq < 32768)  in rti_wdt_probe()
226 		wdt->freq = wdt->freq * 9 / 10;  in rti_wdt_probe()
236 	platform_set_drvdata(pdev, wdt);  in rti_wdt_probe()
238 	wdd = &wdt->wdd;  in rti_wdt_probe()
243 		wdt->freq * 1000;  in rti_wdt_probe()
246 	watchdog_set_drvdata(wdd, wdt);  in rti_wdt_probe()
251 	wdt->base = devm_ioremap_resource(dev, wdt_mem);  in rti_wdt_probe()
252 	if (IS_ERR(wdt->base)) {  in rti_wdt_probe()
253 		ret = PTR_ERR(wdt->base);  in rti_wdt_probe()
257 	if (readl(wdt->base + RTIDWDCTRL) == WDENABLE_KEY) {  in rti_wdt_probe()
264 		heartbeat_ms = readl(wdt->base + RTIDWDPRLD);  in rti_wdt_probe()
267 		do_div(heartbeat_ms, wdt->freq);  in rti_wdt_probe()
274 		wsize = readl(wdt->base + RTIWWDSIZECTRL);  in rti_wdt_probe()
310 	struct rti_wdt_device *wdt = platform_get_drvdata(pdev);  in rti_wdt_remove()  local
312 	watchdog_unregister_device(&wdt->wdd);  in rti_wdt_remove()
320 	{ .compatible = "ti,j7-rti-wdt", },
327 		.name = "rti-wdt",
346 MODULE_ALIAS("platform:rti-wdt");