1 // SPDX-License-Identifier: GPL-2.0+
26 #define DA9062_TWDSCALE_MAX		(ARRAY_SIZE(wdt_timeout) - 1)
29 #define DA9062_WDG_DEFAULT_TIMEOUT	wdt_timeout[DA9062_TWDSCALE_MAX-1]
42 	regmap_read(wdt->hw->regmap, DA9062AA_CONTROL_D, &val);  in da9062_wdt_read_timeout()
47 static unsigned int da9062_wdt_timeout_to_sel(unsigned int secs)  in da9062_wdt_timeout_to_sel()  argument
52 		if (wdt_timeout[i] >= secs)  in da9062_wdt_timeout_to_sel()
61 	return regmap_update_bits(wdt->hw->regmap, DA9062AA_CONTROL_F,  in da9062_reset_watchdog_timer()
69 	struct da9062 *chip = wdt->hw;  in da9062_wdt_update_timeout_register()
71 	regmap_update_bits(chip->regmap,  in da9062_wdt_update_timeout_register()
78 	return regmap_update_bits(chip->regmap,  in da9062_wdt_update_timeout_register()
90 	selector = da9062_wdt_timeout_to_sel(wdt->wdtdev.timeout);  in da9062_wdt_start()
93 		dev_err(wdt->hw->dev, "Watchdog failed to start (err = %d)\n",  in da9062_wdt_start()
104 	ret = regmap_update_bits(wdt->hw->regmap,  in da9062_wdt_stop()
109 		dev_err(wdt->hw->dev, "Watchdog failed to stop (err = %d)\n",  in da9062_wdt_stop()
129 		dev_err(wdt->hw->dev, "Failed to ping the watchdog (err = %d)\n",  in da9062_wdt_ping()
136 				  unsigned int timeout)  in da9062_wdt_set_timeout()  argument
142 	selector = da9062_wdt_timeout_to_sel(timeout);  in da9062_wdt_set_timeout()
145 		dev_err(wdt->hw->dev, "Failed to set watchdog timeout (err = %d)\n",  in da9062_wdt_set_timeout()
148 		wdd->timeout = wdt_timeout[selector];  in da9062_wdt_set_timeout()
157 	struct i2c_client *client = to_i2c_client(wdt->hw->dev);  in da9062_wdt_restart()
168 	ret = __i2c_smbus_xfer(client->adapter, client->addr, client->flags,  in da9062_wdt_restart()
173 		dev_alert(wdt->hw->dev, "Failed to shutdown (err = %d)\n",  in da9062_wdt_restart()
197 	{ .compatible = "dlg,da9062-watchdog", },
205 	struct device *dev = &pdev->dev;  in da9062_wdt_probe()
206 	unsigned int timeout;  in da9062_wdt_probe()  local
210 	chip = dev_get_drvdata(dev->parent);  in da9062_wdt_probe()
212 		return -EINVAL;  in da9062_wdt_probe()
216 		return -ENOMEM;  in da9062_wdt_probe()
218 	wdt->use_sw_pm = device_property_present(dev, "dlg,use-sw-pm");  in da9062_wdt_probe()
220 	wdt->hw = chip;  in da9062_wdt_probe()
222 	wdt->wdtdev.info = &da9062_watchdog_info;  in da9062_wdt_probe()
223 	wdt->wdtdev.ops = &da9062_watchdog_ops;  in da9062_wdt_probe()
224 	wdt->wdtdev.min_timeout = DA9062_WDT_MIN_TIMEOUT;  in da9062_wdt_probe()
225 	wdt->wdtdev.max_timeout = DA9062_WDT_MAX_TIMEOUT;  in da9062_wdt_probe()
226 	wdt->wdtdev.min_hw_heartbeat_ms = DA9062_RESET_PROTECTION_MS;  in da9062_wdt_probe()
227 	wdt->wdtdev.timeout = DA9062_WDG_DEFAULT_TIMEOUT;  in da9062_wdt_probe()
228 	wdt->wdtdev.status = WATCHDOG_NOWAYOUT_INIT_STATUS;  in da9062_wdt_probe()
229 	wdt->wdtdev.parent = dev;  in da9062_wdt_probe()
231 	watchdog_set_restart_priority(&wdt->wdtdev, 128);  in da9062_wdt_probe()
233 	watchdog_set_drvdata(&wdt->wdtdev, wdt);  in da9062_wdt_probe()
234 	dev_set_drvdata(dev, &wdt->wdtdev);  in da9062_wdt_probe()
236 	timeout = da9062_wdt_read_timeout(wdt);  in da9062_wdt_probe()
237 	if (timeout)  in da9062_wdt_probe()
238 		wdt->wdtdev.timeout = timeout;  in da9062_wdt_probe()
240 	/* Set timeout from DT value if available */  in da9062_wdt_probe()
241 	watchdog_init_timeout(&wdt->wdtdev, 0, dev);  in da9062_wdt_probe()
243 	if (timeout) {  in da9062_wdt_probe()
244 		da9062_wdt_set_timeout(&wdt->wdtdev, wdt->wdtdev.timeout);  in da9062_wdt_probe()
245 		set_bit(WDOG_HW_RUNNING, &wdt->wdtdev.status);  in da9062_wdt_probe()
248 	return devm_watchdog_register_device(dev, &wdt->wdtdev);  in da9062_wdt_probe()
256 	if (!wdt->use_sw_pm)  in da9062_wdt_suspend()
270 	if (!wdt->use_sw_pm)  in da9062_wdt_resume()
285 		.name = "da9062-watchdog",
295 MODULE_ALIAS("platform:da9062-watchdog");