1 // SPDX-License-Identifier: GPL-2.0-only
49 	unsigned long		rate;  member
56 	return wdt->base + wdt->layout[reg];  in wdt_addr()
77 	unsigned int bark = wdd->timeout - wdd->pretimeout;  in qcom_wdt_start()
81 	writel(bark * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));  in qcom_wdt_start()
82 	writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));  in qcom_wdt_start()
106 	wdd->timeout = timeout;  in qcom_wdt_set_timeout()
113 	wdd->pretimeout = timeout;  in qcom_wdt_set_pretimeout()
125 	 *    Setup BITE_TIME to be 128ms, and enable WDT.  in qcom_wdt_restart()
127 	timeout = 128 * wdt->rate / 1000;  in qcom_wdt_restart()
192 	struct device *dev = &pdev->dev;  in qcom_wdt_probe()
195 	struct device_node *np = dev->of_node;  in qcom_wdt_probe()  local
204 		return -ENODEV;  in qcom_wdt_probe()
209 		return -ENOMEM;  in qcom_wdt_probe()
213 		return -ENOMEM;  in qcom_wdt_probe()
216 	if (of_property_read_u32(np, "cpu-offset", &percpu_offset))  in qcom_wdt_probe()
219 	res->start += percpu_offset;  in qcom_wdt_probe()
220 	res->end += percpu_offset;  in qcom_wdt_probe()
222 	wdt->base = devm_ioremap_resource(dev, res);  in qcom_wdt_probe()
223 	if (IS_ERR(wdt->base))  in qcom_wdt_probe()
224 		return PTR_ERR(wdt->base);  in qcom_wdt_probe()
233 	 * We use the clock rate to calculate the max timeout, so ensure it's  in qcom_wdt_probe()
234 	 * not zero to avoid a divide-by-zero exception.  in qcom_wdt_probe()
240 	wdt->rate = clk_get_rate(clk);  in qcom_wdt_probe()
241 	if (wdt->rate == 0 ||  in qcom_wdt_probe()
242 	    wdt->rate > data->max_tick_count) {  in qcom_wdt_probe()
243 		dev_err(dev, "invalid clock rate\n");  in qcom_wdt_probe()
244 		return -EINVAL;  in qcom_wdt_probe()
249 	if (data->pretimeout && irq > 0) {  in qcom_wdt_probe()
251 				       "wdt_bark", &wdt->wdd);  in qcom_wdt_probe()
255 		wdt->wdd.info = &qcom_wdt_pt_info;  in qcom_wdt_probe()
256 		wdt->wdd.pretimeout = 1;  in qcom_wdt_probe()
258 		if (irq == -EPROBE_DEFER)  in qcom_wdt_probe()
259 			return -EPROBE_DEFER;  in qcom_wdt_probe()
261 		wdt->wdd.info = &qcom_wdt_info;  in qcom_wdt_probe()
264 	wdt->wdd.ops = &qcom_wdt_ops;  in qcom_wdt_probe()
265 	wdt->wdd.min_timeout = 1;  in qcom_wdt_probe()
266 	wdt->wdd.max_timeout = data->max_tick_count / wdt->rate;  in qcom_wdt_probe()
267 	wdt->wdd.parent = dev;  in qcom_wdt_probe()
268 	wdt->layout = data->offset;  in qcom_wdt_probe()
271 		wdt->wdd.bootstatus = WDIOF_CARDRESET;  in qcom_wdt_probe()
274 	 * If 'timeout-sec' unspecified in devicetree, assume a 30 second  in qcom_wdt_probe()
278 	wdt->wdd.timeout = min(wdt->wdd.max_timeout, 30U);  in qcom_wdt_probe()
279 	watchdog_init_timeout(&wdt->wdd, 0, dev);  in qcom_wdt_probe()
287 	if (qcom_wdt_is_running(&wdt->wdd)) {  in qcom_wdt_probe()
288 		qcom_wdt_start(&wdt->wdd);  in qcom_wdt_probe()
289 		set_bit(WDOG_HW_RUNNING, &wdt->wdd.status);  in qcom_wdt_probe()
292 	ret = devm_watchdog_register_device(dev, &wdt->wdd);  in qcom_wdt_probe()
304 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_suspend()
305 		qcom_wdt_stop(&wdt->wdd);  in qcom_wdt_suspend()
314 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_resume()
315 		qcom_wdt_start(&wdt->wdd);  in qcom_wdt_resume()
325 	{ .compatible = "qcom,kpss-timer", .data = &match_data_apcs_tmr },
326 	{ .compatible = "qcom,scss-timer", .data = &match_data_apcs_tmr },
327 	{ .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },