53 static void __iomem *wdt_addr(struct qcom_wdt *wdt, enum wdt_reg reg)  in wdt_addr()  argument
55 	return wdt->base + wdt->layout[reg];  in wdt_addr()
75 	struct qcom_wdt *wdt = to_qcom_wdt(wdd);  in qcom_wdt_start()  local
78 	writel(0, wdt_addr(wdt, WDT_EN));  in qcom_wdt_start()
79 	writel(1, wdt_addr(wdt, WDT_RST));  in qcom_wdt_start()
80 	writel(bark * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));  in qcom_wdt_start()
81 	writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));  in qcom_wdt_start()
82 	writel(QCOM_WDT_ENABLE, wdt_addr(wdt, WDT_EN));  in qcom_wdt_start()
88 	struct qcom_wdt *wdt = to_qcom_wdt(wdd);  in qcom_wdt_stop()  local
90 	writel(0, wdt_addr(wdt, WDT_EN));  in qcom_wdt_stop()
96 	struct qcom_wdt *wdt = to_qcom_wdt(wdd);  in qcom_wdt_ping()  local
98 	writel(1, wdt_addr(wdt, WDT_RST));  in qcom_wdt_ping()
119 	struct qcom_wdt *wdt = to_qcom_wdt(wdd);  in qcom_wdt_restart()  local
124 	 *    Setup BITE_TIME to be 128ms, and enable WDT.  in qcom_wdt_restart()
126 	timeout = 128 * wdt->rate / 1000;  in qcom_wdt_restart()
128 	writel(0, wdt_addr(wdt, WDT_EN));  in qcom_wdt_restart()
129 	writel(1, wdt_addr(wdt, WDT_RST));  in qcom_wdt_restart()
130 	writel(timeout, wdt_addr(wdt, WDT_BARK_TIME));  in qcom_wdt_restart()
131 	writel(timeout, wdt_addr(wdt, WDT_BITE_TIME));  in qcom_wdt_restart()
132 	writel(QCOM_WDT_ENABLE, wdt_addr(wdt, WDT_EN));  in qcom_wdt_restart()
145 	struct qcom_wdt *wdt = to_qcom_wdt(wdd);  in qcom_wdt_is_running()  local
147 	return (readl(wdt_addr(wdt, WDT_EN)) & QCOM_WDT_ENABLE);  in qcom_wdt_is_running()
190 	struct qcom_wdt *wdt;  in qcom_wdt_probe()  local
200 		dev_err(dev, "Unsupported QCOM WDT module\n");  in qcom_wdt_probe()
204 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in qcom_wdt_probe()
205 	if (!wdt)  in qcom_wdt_probe()
219 	wdt->base = devm_ioremap_resource(dev, res);  in qcom_wdt_probe()
220 	if (IS_ERR(wdt->base))  in qcom_wdt_probe()
221 		return PTR_ERR(wdt->base);  in qcom_wdt_probe()
233 	 * WATCHDOG_CORE assumes units of seconds, if the WDT is clocked such  in qcom_wdt_probe()
237 	wdt->rate = clk_get_rate(clk);  in qcom_wdt_probe()
238 	if (wdt->rate == 0 ||  in qcom_wdt_probe()
239 	    wdt->rate > 0x10000000U) {  in qcom_wdt_probe()
248 				       "wdt_bark", &wdt->wdd);  in qcom_wdt_probe()
252 		wdt->wdd.info = &qcom_wdt_pt_info;  in qcom_wdt_probe()
253 		wdt->wdd.pretimeout = 1;  in qcom_wdt_probe()
258 		wdt->wdd.info = &qcom_wdt_info;  in qcom_wdt_probe()
261 	wdt->wdd.ops = &qcom_wdt_ops;  in qcom_wdt_probe()
262 	wdt->wdd.min_timeout = 1;  in qcom_wdt_probe()
263 	wdt->wdd.max_timeout = 0x10000000U / wdt->rate;  in qcom_wdt_probe()
264 	wdt->wdd.parent = dev;  in qcom_wdt_probe()
265 	wdt->layout = data->offset;  in qcom_wdt_probe()
267 	if (readl(wdt_addr(wdt, WDT_STS)) & 1)  in qcom_wdt_probe()
268 		wdt->wdd.bootstatus = WDIOF_CARDRESET;  in qcom_wdt_probe()
275 	wdt->wdd.timeout = min(wdt->wdd.max_timeout, 30U);  in qcom_wdt_probe()
276 	watchdog_init_timeout(&wdt->wdd, 0, dev);  in qcom_wdt_probe()
279 	 * If WDT is already running, call WDT start which  in qcom_wdt_probe()
280 	 * will stop the WDT, set timeouts as bootloader  in qcom_wdt_probe()
282 	 * to inform the WDT subsystem to ping the WDT  in qcom_wdt_probe()
284 	if (qcom_wdt_is_running(&wdt->wdd)) {  in qcom_wdt_probe()
285 		qcom_wdt_start(&wdt->wdd);  in qcom_wdt_probe()
286 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);  in qcom_wdt_probe()
289 	ret = devm_watchdog_register_device(dev, &wdt->wdd);  in qcom_wdt_probe()
293 	platform_set_drvdata(pdev, wdt);  in qcom_wdt_probe()
299 	struct qcom_wdt *wdt = dev_get_drvdata(dev);  in qcom_wdt_suspend()  local
301 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_suspend()
302 		qcom_wdt_stop(&wdt->wdd);  in qcom_wdt_suspend()
309 	struct qcom_wdt *wdt = dev_get_drvdata(dev);  in qcom_wdt_resume()  local
311 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_resume()
312 		qcom_wdt_start(&wdt->wdd);  in qcom_wdt_resume()
324 	{ .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },