wakeup.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <soc/power.h>
#include <soc/wakeup.h>
 
void wakeup(void)
{
        if (wakeup_need_reset())
                power_reset();
 
        power_init();  /* Ensure ps_hold_setup() for early wakeup. */
        power_exit_wakeup();
        /* Should never return. If we do, reset. */
        power_reset();
}
 
int get_wakeup_state(void)
{
        uint32_t status = power_read_reset_status();
 
        /* DIDLE/LPA can be resumed without clock reset (ex, bootblock),
         * and SLEEP requires resetting clock (should be done in ROM stage).
         */
 
        if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA)
                return WAKEUP_DIRECT;
 
        if (status == S5P_CHECK_SLEEP)
                return WAKEUP_NEED_CLOCK_RESET;
 
        return IS_NOT_WAKEUP;
}
 
void wakeup_enable_uart(void)
{
        power_release_uart_retention();
}