1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
26 #define GXBB_WDT_CTRL_DIV_MASK			(BIT(18) - 1)
28 #define GXBB_WDT_TCNT_SETUP_MASK		(BIT(16) - 1)
55 	writel(readl(data->reg_base + GXBB_WDT_CTRL_REG) | GXBB_WDT_CTRL_EN,  in meson_gxbb_wdt_start()
56 	       data->reg_base + GXBB_WDT_CTRL_REG);  in meson_gxbb_wdt_start()
65 	writel(readl(data->reg_base + GXBB_WDT_CTRL_REG) & ~GXBB_WDT_CTRL_EN,  in meson_gxbb_wdt_stop()
66 	       data->reg_base + GXBB_WDT_CTRL_REG);  in meson_gxbb_wdt_stop()
75 	writel(0, data->reg_base + GXBB_WDT_RSET_REG);  in meson_gxbb_wdt_ping()
89 	wdt_dev->timeout = timeout;  in meson_gxbb_wdt_set_timeout()
93 	writel(tcnt, data->reg_base + GXBB_WDT_TCNT_REG);  in meson_gxbb_wdt_set_timeout()
103 	reg = readl(data->reg_base + GXBB_WDT_TCNT_REG);  in meson_gxbb_wdt_get_timeleft()
105 	return ((reg & GXBB_WDT_TCNT_SETUP_MASK) -  in meson_gxbb_wdt_get_timeleft()
118 	.identity = "Meson GXBB Watchdog",
122 static int __maybe_unused meson_gxbb_wdt_resume(struct device *dev)  in meson_gxbb_wdt_resume()
126 	if (watchdog_active(&data->wdt_dev))  in meson_gxbb_wdt_resume()
127 		meson_gxbb_wdt_start(&data->wdt_dev);  in meson_gxbb_wdt_resume()
132 static int __maybe_unused meson_gxbb_wdt_suspend(struct device *dev)  in meson_gxbb_wdt_suspend()
136 	if (watchdog_active(&data->wdt_dev))  in meson_gxbb_wdt_suspend()
137 		meson_gxbb_wdt_stop(&data->wdt_dev);  in meson_gxbb_wdt_suspend()
155 	 { .compatible = "amlogic,meson-gxbb-wdt", .data = &gxbb_params, },
156 	 { .compatible = "amlogic,t7-wdt", .data = &t7_params, },
163 	struct device *dev = &pdev->dev;  in meson_gxbb_wdt_probe()
170 		return -ENOMEM;  in meson_gxbb_wdt_probe()
172 	data->reg_base = devm_platform_ioremap_resource(pdev, 0);  in meson_gxbb_wdt_probe()
173 	if (IS_ERR(data->reg_base))  in meson_gxbb_wdt_probe()
174 		return PTR_ERR(data->reg_base);  in meson_gxbb_wdt_probe()
176 	data->clk = devm_clk_get_enabled(dev, NULL);  in meson_gxbb_wdt_probe()
177 	if (IS_ERR(data->clk))  in meson_gxbb_wdt_probe()
178 		return PTR_ERR(data->clk);  in meson_gxbb_wdt_probe()
184 	data->wdt_dev.parent = dev;  in meson_gxbb_wdt_probe()
185 	data->wdt_dev.info = &meson_gxbb_wdt_info;  in meson_gxbb_wdt_probe()
186 	data->wdt_dev.ops = &meson_gxbb_wdt_ops;  in meson_gxbb_wdt_probe()
187 	data->wdt_dev.max_hw_heartbeat_ms = GXBB_WDT_TCNT_SETUP_MASK;  in meson_gxbb_wdt_probe()
188 	data->wdt_dev.min_timeout = 1;  in meson_gxbb_wdt_probe()
189 	data->wdt_dev.timeout = DEFAULT_TIMEOUT;  in meson_gxbb_wdt_probe()
190 	watchdog_init_timeout(&data->wdt_dev, timeout, dev);  in meson_gxbb_wdt_probe()
191 	watchdog_set_nowayout(&data->wdt_dev, nowayout);  in meson_gxbb_wdt_probe()
192 	watchdog_set_drvdata(&data->wdt_dev, data);  in meson_gxbb_wdt_probe()
194 	ctrl_reg = readl(data->reg_base + GXBB_WDT_CTRL_REG) &  in meson_gxbb_wdt_probe()
198 		/* Watchdog is running - keep it running but extend timeout  in meson_gxbb_wdt_probe()
201 		set_bit(WDOG_HW_RUNNING, &data->wdt_dev.status);  in meson_gxbb_wdt_probe()
202 		meson_gxbb_wdt_set_timeout(&data->wdt_dev,  in meson_gxbb_wdt_probe()
207 	ctrl_reg |= ((clk_get_rate(data->clk) / 1000) &  in meson_gxbb_wdt_probe()
209 			params->rst |  in meson_gxbb_wdt_probe()
213 	writel(ctrl_reg, data->reg_base + GXBB_WDT_CTRL_REG);  in meson_gxbb_wdt_probe()
214 	meson_gxbb_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);  in meson_gxbb_wdt_probe()
216 	return devm_watchdog_register_device(dev, &data->wdt_dev);  in meson_gxbb_wdt_probe()
222 		.name = "meson-gxbb-wdt",
231 MODULE_DESCRIPTION("Amlogic Meson GXBB Watchdog timer driver");