1 // SPDX-License-Identifier: GPL-2.0-only
27  * struct max77620_variant - Data specific to a chip variant
34  * @cnfg_glbl2_cfg_bits: configuration bits to enable in CNFG_GLBL2 register
58 	/* Set WDT clear in OFF and sleep mode */
68 	/* Set WDT clear in sleep mode (there is no WDTOFFC on MAX77714) */
74 	struct max77620_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in max77620_wdt_start()  local
76 	return regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl2,  in max77620_wdt_start()
82 	struct max77620_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in max77620_wdt_stop()  local
84 	return regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl2,  in max77620_wdt_stop()
90 	struct max77620_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in max77620_wdt_ping()  local
92 	return regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl3,  in max77620_wdt_ping()
93 				  wdt->drv_data->wdtc_mask, 0x1);  in max77620_wdt_ping()
99 	struct max77620_wdt *wdt = watchdog_get_drvdata(wdt_dev);  in max77620_wdt_set_timeout()  local
131 	ret = regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl3,  in max77620_wdt_set_timeout()
132 				 wdt->drv_data->wdtc_mask, 0x1);  in max77620_wdt_set_timeout()
136 	ret = regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl2,  in max77620_wdt_set_timeout()
141 	wdt_dev->timeout = wdt_timeout;  in max77620_wdt_set_timeout()
147 	.identity = "max77620-watchdog",
161 	struct device *dev = &pdev->dev;  in max77620_wdt_probe()
162 	struct max77620_wdt *wdt;  in max77620_wdt_probe()  local
167 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in max77620_wdt_probe()
168 	if (!wdt)  in max77620_wdt_probe()
169 		return -ENOMEM;  in max77620_wdt_probe()
171 	wdt->dev = dev;  in max77620_wdt_probe()
172 	wdt->drv_data = (const struct max77620_variant *) id->driver_data;  in max77620_wdt_probe()
174 	wdt->rmap = dev_get_regmap(dev->parent, NULL);  in max77620_wdt_probe()
175 	if (!wdt->rmap) {  in max77620_wdt_probe()
176 		dev_err(wdt->dev, "Failed to get parent regmap\n");  in max77620_wdt_probe()
177 		return -ENODEV;  in max77620_wdt_probe()
180 	wdt_dev = &wdt->wdt_dev;  in max77620_wdt_probe()
181 	wdt_dev->info = &max77620_wdt_info;  in max77620_wdt_probe()
182 	wdt_dev->ops = &max77620_wdt_ops;  in max77620_wdt_probe()
183 	wdt_dev->min_timeout = 2;  in max77620_wdt_probe()
184 	wdt_dev->max_timeout = 128;  in max77620_wdt_probe()
185 	wdt_dev->max_hw_heartbeat_ms = 128 * 1000;  in max77620_wdt_probe()
187 	platform_set_drvdata(pdev, wdt);  in max77620_wdt_probe()
189 	/* Enable WD_RST_WK - WDT expire results in a restart */  in max77620_wdt_probe()
190 	ret = regmap_update_bits(wdt->rmap, wdt->drv_data->reg_onoff_cnfg2,  in max77620_wdt_probe()
191 				 wdt->drv_data->bit_wd_rst_wk,  in max77620_wdt_probe()
192 				 wdt->drv_data->bit_wd_rst_wk);  in max77620_wdt_probe()
194 		dev_err(wdt->dev, "Failed to set WD_RST_WK: %d\n", ret);  in max77620_wdt_probe()
198 	/* Set the "auto WDT clear" bits available on the chip */  in max77620_wdt_probe()
199 	ret = regmap_update_bits(wdt->rmap, wdt->drv_data->reg_cnfg_glbl2,  in max77620_wdt_probe()
200 				 wdt->drv_data->cnfg_glbl2_cfg_bits,  in max77620_wdt_probe()
201 				 wdt->drv_data->cnfg_glbl2_cfg_bits);  in max77620_wdt_probe()
203 		dev_err(wdt->dev, "Failed to set WDT OFF mode: %d\n", ret);  in max77620_wdt_probe()
207 	/* Check if WDT running and if yes then set flags properly */  in max77620_wdt_probe()
208 	ret = regmap_read(wdt->rmap, wdt->drv_data->reg_cnfg_glbl2, &regval);  in max77620_wdt_probe()
210 		dev_err(wdt->dev, "Failed to read WDT CFG register: %d\n", ret);  in max77620_wdt_probe()
216 		wdt_dev->timeout = 2;  in max77620_wdt_probe()
219 		wdt_dev->timeout = 16;  in max77620_wdt_probe()
222 		wdt_dev->timeout = 64;  in max77620_wdt_probe()
225 		wdt_dev->timeout = 128;  in max77620_wdt_probe()
230 		set_bit(WDOG_HW_RUNNING, &wdt_dev->status);  in max77620_wdt_probe()
233 	watchdog_set_drvdata(wdt_dev, wdt);  in max77620_wdt_probe()
240 	{ "max77620-watchdog", (kernel_ulong_t)&max77620_wdt_data },
241 	{ "max77714-watchdog", (kernel_ulong_t)&max77714_wdt_data },
248 		.name	= "max77620-watchdog",
259 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "