4  * SPDX-License-Identifier: Apache-2.0
35 	const struct wdt_ot_aontimer_cfg *const cfg = dev->config;  in ot_aontimer_setup()
36 	volatile uintptr_t regs = cfg->regs;  in ot_aontimer_setup()
40 	if (cfg->wdog_lock) {  in ot_aontimer_setup()
50 	const struct wdt_ot_aontimer_cfg *const cfg = dev->config;  in ot_aontimer_disable()
51 	volatile uintptr_t regs = cfg->regs;  in ot_aontimer_disable()
54 		LOG_ERR("Cannot disable - watchdog settings locked.");  in ot_aontimer_disable()
55 		return -EPERM;  in ot_aontimer_disable()
61 		return -EFAULT;  in ot_aontimer_disable()
69  * The OpenTitan AON Timer includes a multi-level watchdog timer.
77  * The bark interrupt occurs at max (or if the timeout is too long to be
78  * supported, the value x s.t. min < x < max and x is the largest valid timeout)
80  * Minimum must be >= bark.min, and maximum >= bark.max. If the timeout is too
81  * long to fit, it tries to find the value x s.t. min < x < max where x is the
83  * The bite action occurs max.
88 	struct wdt_ot_aontimer_data *data = dev->data;  in ot_aontimer_install_timeout()
89 	const struct wdt_ot_aontimer_cfg *const dev_cfg = dev->config;  in ot_aontimer_install_timeout()
90 	volatile uintptr_t reg_base = dev_cfg->regs;  in ot_aontimer_install_timeout()
91 	const uint64_t max_window = (uint64_t) UINT32_MAX * 1000 / dev_cfg->clk_freq;  in ot_aontimer_install_timeout()
96 	struct wdt_timeout_cfg *bite = cfg->next;  in ot_aontimer_install_timeout()
98 	if (bite == NULL || bite->window.max < cfg->window.max ||  in ot_aontimer_install_timeout()
99 			(uint64_t) bite->window.min > max_window) {  in ot_aontimer_install_timeout()
100 		return -EINVAL;  in ot_aontimer_install_timeout()
106 	if (cfg->flags != WDT_FLAG_RESET_NONE || bite->flags != WDT_FLAG_RESET_SOC) {  in ot_aontimer_install_timeout()
107 		return -ENOTSUP;  in ot_aontimer_install_timeout()
111 	if (cfg->window.min > cfg->window.max || (uint64_t) cfg->window.min > max_window) {  in ot_aontimer_install_timeout()
112 		return -EINVAL;  in ot_aontimer_install_timeout()
116 		LOG_ERR("Cannot install timeout - watchdog settings locked.");  in ot_aontimer_install_timeout()
117 		return -ENOMEM;  in ot_aontimer_install_timeout()
122 		return -EBUSY;  in ot_aontimer_install_timeout()
126 	/* Force 64-bit ops to ensure thresholds fits in the timer reg. */  in ot_aontimer_install_timeout()
127 	bark_thold = ((uint64_t) cfg->window.max * dev_cfg->clk_freq / 1000);  in ot_aontimer_install_timeout()
128 	bite_thold = ((uint64_t) bite->window.max * dev_cfg->clk_freq / 1000);  in ot_aontimer_install_timeout()
136 	data->bark = cfg->callback;  in ot_aontimer_install_timeout()
140 	bite_thold = ((uint64_t) cfg->window.max * dev_cfg->clk_freq / 1000);  in ot_aontimer_install_timeout()
145 	if (cfg->flags == WDT_FLAG_RESET_NONE) {  in ot_aontimer_install_timeout()
146 		/* Set bite -> bark, so we generate an interrupt instead of resetting */  in ot_aontimer_install_timeout()
148 		/* Disable bite by writing it to max. Edge case is the bark = max. */  in ot_aontimer_install_timeout()
150 		data->bark = cfg->callback;  in ot_aontimer_install_timeout()
152 		data->bark = NULL;  in ot_aontimer_install_timeout()
153 		/* Effectively disable bark by setting it to max */  in ot_aontimer_install_timeout()
165 	const struct wdt_ot_aontimer_cfg *const cfg = dev->config;  in ot_aontimer_feed()
166 	volatile uintptr_t regs = cfg->regs;  in ot_aontimer_feed()
177 	const struct wdt_ot_aontimer_cfg *const cfg = dev->config;  in wdt_ot_isr()
178 	struct wdt_ot_aontimer_data *data = dev->data;  in wdt_ot_isr()
179 	volatile uintptr_t regs = cfg->regs;  in wdt_ot_isr()
181 	if (data->bark != NULL) {  in wdt_ot_isr()
182 		data->bark(dev, 0);  in wdt_ot_isr()