1 // SPDX-License-Identifier: GPL-2.0-only
55 	return wdt->base + wdt->layout[reg];  in wdt_addr()
76 	unsigned int bark = wdd->timeout - wdd->pretimeout;  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()
105 	wdd->timeout = timeout;  in qcom_wdt_set_timeout()
112 	wdd->pretimeout = timeout;  in qcom_wdt_set_pretimeout()
126 	timeout = 128 * wdt->rate / 1000;  in qcom_wdt_restart()
189 	struct device *dev = &pdev->dev;  in qcom_wdt_probe()
192 	struct device_node *np = dev->of_node;  in qcom_wdt_probe()
201 		return -ENODEV;  in qcom_wdt_probe()
206 		return -ENOMEM;  in qcom_wdt_probe()
210 		return -ENOMEM;  in qcom_wdt_probe()
213 	if (of_property_read_u32(np, "cpu-offset", &percpu_offset))  in qcom_wdt_probe()
216 	res->start += percpu_offset;  in qcom_wdt_probe()
217 	res->end += percpu_offset;  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()
231 	 * not zero to avoid a divide-by-zero exception.  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()
241 		return -EINVAL;  in qcom_wdt_probe()
246 	if (data->pretimeout && irq > 0) {  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()
255 		if (irq == -EPROBE_DEFER)  in qcom_wdt_probe()
256 			return -EPROBE_DEFER;  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()
268 		wdt->wdd.bootstatus = WDIOF_CARDRESET;  in qcom_wdt_probe()
271 	 * If 'timeout-sec' unspecified in devicetree, assume a 30 second  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()
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()
301 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_suspend()
302 		qcom_wdt_stop(&wdt->wdd);  in qcom_wdt_suspend()
311 	if (watchdog_active(&wdt->wdd))  in qcom_wdt_resume()
312 		qcom_wdt_start(&wdt->wdd);  in qcom_wdt_resume()
322 	{ .compatible = "qcom,kpss-timer", .data = &match_data_apcs_tmr },
323 	{ .compatible = "qcom,scss-timer", .data = &match_data_apcs_tmr },
324 	{ .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },
339 MODULE_DESCRIPTION("QCOM KPSS Watchdog Driver");