1 // SPDX-License-Identifier: GPL-2.0-only
26 	unsigned long rate;  member
55 	__raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET);  in ixp4xx_wdt_start()
56 	__raw_writel(0, iwdt->base + IXP4XX_OSWE_OFFSET);  in ixp4xx_wdt_start()
57 	__raw_writel(wdd->timeout * iwdt->rate,  in ixp4xx_wdt_start()
58 		     iwdt->base + IXP4XX_OSWT_OFFSET);  in ixp4xx_wdt_start()
60 		     iwdt->base + IXP4XX_OSWE_OFFSET);  in ixp4xx_wdt_start()
61 	__raw_writel(0, iwdt->base + IXP4XX_OSWK_OFFSET);  in ixp4xx_wdt_start()
70 	__raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET);  in ixp4xx_wdt_stop()
71 	__raw_writel(0, iwdt->base + IXP4XX_OSWE_OFFSET);  in ixp4xx_wdt_stop()
72 	__raw_writel(0, iwdt->base + IXP4XX_OSWK_OFFSET);  in ixp4xx_wdt_stop()
80 	wdd->timeout = timeout;  in ixp4xx_wdt_set_timeout()
92 	__raw_writel(IXP4XX_WDT_KEY, iwdt->base + IXP4XX_OSWK_OFFSET);  in ixp4xx_wdt_restart()
93 	__raw_writel(0, iwdt->base + IXP4XX_OSWT_OFFSET);  in ixp4xx_wdt_restart()
95 		     iwdt->base + IXP4XX_OSWE_OFFSET);  in ixp4xx_wdt_restart()
137 	struct device *dev = &pdev->dev;  in ixp4xx_wdt_probe()
143 		dev_info(dev, "Rev. A0 IXP42x CPU detected - only restart supported\n");  in ixp4xx_wdt_probe()
151 		return -ENOMEM;  in ixp4xx_wdt_probe()
152 	iwdt->base = (void __iomem *)dev->platform_data;  in ixp4xx_wdt_probe()
155 	 * Retrieve rate from a fixed clock from the device tree if  in ixp4xx_wdt_probe()
156 	 * the parent has that, else use the default clock rate.  in ixp4xx_wdt_probe()
158 	clk = devm_clk_get_enabled(dev->parent, NULL);  in ixp4xx_wdt_probe()
160 		iwdt->rate = clk_get_rate(clk);  in ixp4xx_wdt_probe()
162 	if (!iwdt->rate)  in ixp4xx_wdt_probe()
163 		iwdt->rate = IXP4XX_TIMER_FREQ;  in ixp4xx_wdt_probe()
165 	iwdt->wdd.info = &ixp4xx_wdt_info;  in ixp4xx_wdt_probe()
166 	iwdt->wdd.ops = iwdt_ops;  in ixp4xx_wdt_probe()
167 	iwdt->wdd.min_timeout = 1;  in ixp4xx_wdt_probe()
168 	iwdt->wdd.max_timeout = U32_MAX / iwdt->rate;  in ixp4xx_wdt_probe()
169 	iwdt->wdd.parent = dev;  in ixp4xx_wdt_probe()
171 	iwdt->wdd.timeout = 60U;  in ixp4xx_wdt_probe()
172 	watchdog_init_timeout(&iwdt->wdd, 0, dev);  in ixp4xx_wdt_probe()
174 	if (__raw_readl(iwdt->base + IXP4XX_OSST_OFFSET) &  in ixp4xx_wdt_probe()
176 		iwdt->wdd.bootstatus = WDIOF_CARDRESET;  in ixp4xx_wdt_probe()
178 	ret = devm_watchdog_register_device(dev, &iwdt->wdd);  in ixp4xx_wdt_probe()
190 		.name   = "ixp4xx-watchdog",