3  * SPDX-License-Identifier: Apache-2.0
42 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_install_timeout()
43 	struct wdt_it8xxx2_data *data = dev->data;  in wdt_it8xxx2_install_timeout()
44 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_install_timeout()
47 	if ((inst->ETWCFG) & IT8XXX2_WDT_LEWDCNTL) {  in wdt_it8xxx2_install_timeout()
48 		return -EBUSY;  in wdt_it8xxx2_install_timeout()
55 	if ((config->window.min != 0) || (config->window.max == 0)) {  in wdt_it8xxx2_install_timeout()
56 		data->timeout_installed = false;  in wdt_it8xxx2_install_timeout()
57 		return -EINVAL;  in wdt_it8xxx2_install_timeout()
61 	data->timeout = config->window.max;  in wdt_it8xxx2_install_timeout()
64 	data->callback = config->callback;  in wdt_it8xxx2_install_timeout()
67 	data->timeout_installed = true;  in wdt_it8xxx2_install_timeout()
74 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_setup()
75 	struct wdt_it8xxx2_data *data = dev->data;  in wdt_it8xxx2_setup()
76 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_setup()
77 	uint16_t cnt0 = WARNING_TIMER_PERIOD_MS_TO_1024HZ_COUNT(data->timeout);  in wdt_it8xxx2_setup()
78 	uint16_t cnt1 = WARNING_TIMER_PERIOD_MS_TO_1024HZ_COUNT((data->timeout  in wdt_it8xxx2_setup()
81 	/* disable pre-warning timer1 interrupt */  in wdt_it8xxx2_setup()
84 	if (!data->timeout_installed) {  in wdt_it8xxx2_setup()
86 		return -EINVAL;  in wdt_it8xxx2_setup()
89 	if ((inst->ETWCFG) & IT8XXX2_WDT_LEWDCNTL) {  in wdt_it8xxx2_setup()
91 		return -EBUSY;  in wdt_it8xxx2_setup()
96 		return -ENOTSUP;  in wdt_it8xxx2_setup()
99 	/* pre-warning timer1 is 16-bit counter down timer */  in wdt_it8xxx2_setup()
100 	inst->ET1CNTLHR = (cnt0 >> 8) & 0xff;  in wdt_it8xxx2_setup()
101 	inst->ET1CNTLLR = cnt0 & 0xff;  in wdt_it8xxx2_setup()
103 	/* clear pre-warning timer1 interrupt status */  in wdt_it8xxx2_setup()
106 	/* enable pre-warning timer1 interrupt */  in wdt_it8xxx2_setup()
109 	/* don't stop watchdog timer counting */  in wdt_it8xxx2_setup()
110 	inst->ETWCTRL &= ~IT8XXX2_WDT_EWDSCEN;  in wdt_it8xxx2_setup()
112 	/* set watchdog timer count */  in wdt_it8xxx2_setup()
113 	inst->EWDCNTHR = (cnt1 >> 8) & 0xff;  in wdt_it8xxx2_setup()
114 	inst->EWDCNTLR = cnt1 & 0xff;  in wdt_it8xxx2_setup()
117 	inst->ETWCFG &= ~IT8XXX2_WDT_LET1CNTL;  in wdt_it8xxx2_setup()
125 	inst->ETWCFG = (IT8XXX2_WDT_EWDKEYEN |  in wdt_it8xxx2_setup()
136  * reload the WDT and pre-warning timer1 counter
144 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_feed()
145 	struct wdt_it8xxx2_data *data = dev->data;  in wdt_it8xxx2_feed()
146 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_feed()
147 	uint16_t cnt0 = WARNING_TIMER_PERIOD_MS_TO_1024HZ_COUNT(data->timeout);  in wdt_it8xxx2_feed()
151 	/* reset pre-warning timer1 */  in wdt_it8xxx2_feed()
152 	inst->ETWCTRL |= IT8XXX2_WDT_ET1RST;  in wdt_it8xxx2_feed()
154 	/* restart watchdog timer */  in wdt_it8xxx2_feed()
155 	inst->EWDKEYR = IT8XXX2_WATCHDOG_MAGIC_BYTE;  in wdt_it8xxx2_feed()
157 	/* reset pre-warning timer1 to default if time is touched */  in wdt_it8xxx2_feed()
161 		/* pre-warning timer1 is 16-bit counter down timer */  in wdt_it8xxx2_feed()
162 		inst->ET1CNTLHR = (cnt0 >> 8) & 0xff;  in wdt_it8xxx2_feed()
163 		inst->ET1CNTLLR = cnt0 & 0xff;  in wdt_it8xxx2_feed()
179 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_disable()
180 	struct wdt_it8xxx2_data *data = dev->data;  in wdt_it8xxx2_disable()
181 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_disable()
183 	/* stop watchdog timer counting */  in wdt_it8xxx2_disable()
184 	inst->ETWCTRL |= IT8XXX2_WDT_EWDSCEN;  in wdt_it8xxx2_disable()
187 	inst->ETWCFG &= ~IT8XXX2_WDT_LEWDCNTL;  in wdt_it8xxx2_disable()
189 	/* disable pre-warning timer1 interrupt */  in wdt_it8xxx2_disable()
193 	data->timeout_installed = false;  in wdt_it8xxx2_disable()
202 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_isr()
203 	struct wdt_it8xxx2_data *data = dev->data;  in wdt_it8xxx2_isr()
204 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_isr()
206 	/* clear pre-warning timer1 interrupt status */  in wdt_it8xxx2_isr()
209 	/* reset pre-warning timer1 */  in wdt_it8xxx2_isr()
210 	inst->ETWCTRL |= IT8XXX2_WDT_ET1RST;  in wdt_it8xxx2_isr()
213 	if (data->callback) {  in wdt_it8xxx2_isr()
214 		data->callback(dev, 0);  in wdt_it8xxx2_isr()
219 		 * Once warning timer triggered: if watchdog timer isn't reloaded,  in wdt_it8xxx2_isr()
220 		 * then we will reduce interval of warning timer to 30ms to print  in wdt_it8xxx2_isr()
226 			/* pre-warning timer1 is 16-bit counter down timer */  in wdt_it8xxx2_isr()
227 			inst->ET1CNTLHR = (cnt0 >> 8) & 0xff;  in wdt_it8xxx2_isr()
228 			inst->ET1CNTLLR = cnt0 & 0xff;  in wdt_it8xxx2_isr()
230 			/* clear pre-warning timer1 interrupt status */  in wdt_it8xxx2_isr()
248 	const struct wdt_it8xxx2_config *const wdt_config = dev->config;  in wdt_it8xxx2_init()
249 	struct wdt_it8xxx2_regs *const inst = wdt_config->base;  in wdt_it8xxx2_init()
256 	inst->ETWCFG = 0x00;  in wdt_it8xxx2_init()
259 	inst->ET1PSR = IT8XXX2_WDT_ETPS_1P024_KHZ;  in wdt_it8xxx2_init()
262 	inst->ETWCFG = (IT8XXX2_WDT_EWDKEYEN |  in wdt_it8xxx2_init()
269 	inst->ETWCTRL |= IT8XXX2_WDT_EWDSCMS;  in wdt_it8xxx2_init()