4  * SPDX-License-Identifier: Apache-2.0
19 #include <zephyr/dt-bindings/power/stm32_pwr.h>
42  * @brief flags for wake-up pin polarity configuration
46 /* detection of wake-up event on the high level : rising edge */
48 /* detection of wake-up event on the low level : falling edge */
54  * @brief flags for configuration of pull-ups & pull-downs of GPIO ports
55  * that are associated with wake-up pins
66  * @brief Structure for storing the devicetree configuration of a wake-up pin.
71 	/* GPIO pin(s) associated with wake-up pin */
88  * @brief Get wake-up pin configuration from a given devicetree node.
117  * @brief Structure for passing the runtime configuration of a given wake-up pin.
125 	uint32_t pupd_cfg;	/* pull-up/down config of GPIO port associated w/ this wkup pin */
126 	uint32_t ll_gpio_port;	/* GPIO port associated with this wake-up pin */
127 	uint32_t ll_gpio_pin;	/* GPIO pin associated with this wake-up pin */
129 	uint32_t src_selection; /* The source signal to use with this wake-up pin */
133  * @brief LookUp Table to store LL_PWR_WAKEUP_PINx for each wake-up pin.
189  * @brief Configure & enable a wake-up pin.
191  * @param wakeup_pin_cfg wake-up pin runtime configuration.
196 	uint32_t wkup_pin_index = wakeup_pin_cfg->wkup_pin_id;  in wkup_pin_setup()
199 	/* Set wake-up pin polarity */  in wkup_pin_setup()
200 	if (wakeup_pin_cfg->polarity == STM32_PWR_WKUP_PIN_P_FALLING) {  in wkup_pin_setup()
208 	if (wakeup_pin_cfg->pupd_cfg == STM32_PWR_WKUP_PIN_NOPULL) {  in wkup_pin_setup()
209 		LL_PWR_DisableGPIOPullUp(wakeup_pin_cfg->ll_gpio_port,  in wkup_pin_setup()
210 					(1u << wakeup_pin_cfg->ll_gpio_pin));  in wkup_pin_setup()
211 		LL_PWR_DisableGPIOPullDown(wakeup_pin_cfg->ll_gpio_port,  in wkup_pin_setup()
212 					(1u << wakeup_pin_cfg->ll_gpio_pin));  in wkup_pin_setup()
214 	} else if ((wakeup_pin_cfg->pupd_cfg == STM32_PWR_WKUP_PIN_PULLUP) &&  in wkup_pin_setup()
215 						wakeup_pin_cfg->ll_gpio_port) {  in wkup_pin_setup()
216 		LL_PWR_EnableGPIOPullUp(wakeup_pin_cfg->ll_gpio_port,  in wkup_pin_setup()
217 					(1u << wakeup_pin_cfg->ll_gpio_pin));  in wkup_pin_setup()
219 	} else if ((wakeup_pin_cfg->pupd_cfg == STM32_PWR_WKUP_PIN_PULLDOWN) &&  in wkup_pin_setup()
220 						wakeup_pin_cfg->ll_gpio_port) {  in wkup_pin_setup()
221 		LL_PWR_EnableGPIOPullDown(wakeup_pin_cfg->ll_gpio_port,  in wkup_pin_setup()
222 					  (1u << wakeup_pin_cfg->ll_gpio_pin));  in wkup_pin_setup()
227 	/* Select the proper wake-up signal source */  in wkup_pin_setup()
228 	if (wakeup_pin_cfg->src_selection & STM32_PWR_WKUP_PIN_SRC_0) {  in wkup_pin_setup()
230 	} else if (wakeup_pin_cfg->src_selection & STM32_PWR_WKUP_PIN_SRC_1) {  in wkup_pin_setup()
232 	} else if (wakeup_pin_cfg->src_selection & STM32_PWR_WKUP_PIN_SRC_2) {  in wkup_pin_setup()
243  * @brief Exported function to configure a given GPIO pin as a source for wake-up pins
247  * @return 0 on success, -EINVAL if said GPIO pin is not associated with any wake-up pin.
260 	/* Look for a wake-up pin that has this GPIO pin as a source, if any */  in stm32_pwr_wkup_pin_cfg_gpio()
264 			wkup_pin_gpio_cfg = &(wkup_pin_dt_cfg->gpios_cfgs[j]);  in stm32_pwr_wkup_pin_cfg_gpio()
265 			if (wkup_pin_gpio_cfg->port == gpio->port) {  in stm32_pwr_wkup_pin_cfg_gpio()
266 				if (wkup_pin_gpio_cfg->pin == gpio->pin) {  in stm32_pwr_wkup_pin_cfg_gpio()
278 		LOG_DBG("Couldn't find a wake-up event correspending to GPIO %s pin %d\n",  in stm32_pwr_wkup_pin_cfg_gpio()
279 			gpio->port->name, gpio->pin);  in stm32_pwr_wkup_pin_cfg_gpio()
280 		LOG_DBG("=> It cannot be used as a wake-up source\n");  in stm32_pwr_wkup_pin_cfg_gpio()
281 		return -EINVAL;  in stm32_pwr_wkup_pin_cfg_gpio()
284 	wakeup_pin_cfg.wkup_pin_id = wkup_pin_dt_cfg->wkup_pin_id;  in stm32_pwr_wkup_pin_cfg_gpio()
286 /* Each wake-up pin on STM32U5 is associated with 4 wkup srcs, 3 of them correspond to GPIOs. */  in stm32_pwr_wkup_pin_cfg_gpio()
288 	wakeup_pin_cfg.src_selection = wkup_pin_gpio_cfg->dt_flags &  in stm32_pwr_wkup_pin_cfg_gpio()
300 	if (gpio->dt_flags & GPIO_ACTIVE_LOW) {  in stm32_pwr_wkup_pin_cfg_gpio()
310 		if ((gpio_ports[i] == gpio->port) && (i < pwr_ll_gpio_ports_cnt)) {  in stm32_pwr_wkup_pin_cfg_gpio()
316 	wakeup_pin_cfg.ll_gpio_pin = gpio->pin;  in stm32_pwr_wkup_pin_cfg_gpio()
319 	 * Get pull-up/down config, if any, from GPIO flags specified in device "gpios" property  in stm32_pwr_wkup_pin_cfg_gpio()
321 	if (gpio->dt_flags & GPIO_PULL_UP) {  in stm32_pwr_wkup_pin_cfg_gpio()
323 	} else if (gpio->dt_flags & GPIO_PULL_DOWN) {  in stm32_pwr_wkup_pin_cfg_gpio()
336  * @brief Exported function to activate pull-ups/pull-downs configuration of GPIO ports
337  * associated with wake-up pins.