1 // SPDX-License-Identifier: GPL-2.0-only
3  *      intel-mid_wdt: generic Intel MID SCU watchdog driver
6  *      - Merrifield only
23 #include <linux/platform_data/x86/intel-mid_wdt.h>
33 /* SCU watchdog messages */
47 wdt_command(struct mid_wdt *mid, int sub, const void *in, size_t inlen, size_t size)  in wdt_command()  argument
49 	struct intel_scu_ipc_dev *scu = mid->scu;  in wdt_command()
51 	return intel_scu_ipc_dev_command_with_size(scu, IPC_WATCHDOG, sub, in,  in wdt_command()
59 	int timeout = wd->timeout;  in wdt_start()
63 	} ipc_wd_start = { timeout - MID_WDT_PRETIMEOUT, timeout };  in wdt_start()
76 		dev_crit(mid->dev, "error starting watchdog: %d\n", ret);  in wdt_start()
88 		dev_crit(mid->dev, "Error executing keepalive: %d\n", ret);  in wdt_ping()
100 		dev_crit(mid->dev, "Error stopping watchdog: %d\n", ret);  in wdt_stop()
127 	struct device *dev = &pdev->dev;  in mid_wdt_probe()
135 		return -EINVAL;  in mid_wdt_probe()
138 	if (pdata->probe) {  in mid_wdt_probe()
139 		ret = pdata->probe(pdev);  in mid_wdt_probe()
146 		return -ENOMEM;  in mid_wdt_probe()
148 	mid->dev = dev;  in mid_wdt_probe()
149 	wdt_dev = &mid->wd;  in mid_wdt_probe()
151 	wdt_dev->info = &mid_wdt_info;  in mid_wdt_probe()
152 	wdt_dev->ops = &mid_wdt_ops;  in mid_wdt_probe()
153 	wdt_dev->min_timeout = MID_WDT_TIMEOUT_MIN;  in mid_wdt_probe()
154 	wdt_dev->max_timeout = MID_WDT_TIMEOUT_MAX;  in mid_wdt_probe()
155 	wdt_dev->timeout = MID_WDT_DEFAULT_TIMEOUT;  in mid_wdt_probe()
156 	wdt_dev->parent = dev;  in mid_wdt_probe()
161 	mid->scu = devm_intel_scu_ipc_dev_get(dev);  in mid_wdt_probe()
162 	if (!mid->scu)  in mid_wdt_probe()
163 		return -EPROBE_DEFER;  in mid_wdt_probe()
165 	ret = devm_request_irq(dev, pdata->irq, mid_wdt_irq,  in mid_wdt_probe()
169 		dev_err(dev, "error requesting warning irq %d\n", pdata->irq);  in mid_wdt_probe()
174 	 * The firmware followed by U-Boot leaves the watchdog running  in mid_wdt_probe()
187 	set_bit(WDOG_HW_RUNNING, &wdt_dev->status);  in mid_wdt_probe()