/**
 * @file power.h
 * @brief Power management: DC/DC regulator, GPIOTE wakeup, SYSTEM_ON sleep.
 */
#pragma once

/** @brief Enable the DC/DC converter and configure GPIOTE wakeup on the PTT button. */
void power_init(void);

/**
 * @brief Enter SYSTEM_ON low-power sleep and return on the next GPIOTE event.
 *
 * Sets TASKS_LOWPWR then executes WFI.  The CPU wakes when the GPIOTE
 * interrupt fires (button press) and resumes from here.
 */
void power_sleep_until_button(void);