src/soc/samsung/exynos5250/wakeup.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <soc/power.h>
   4 #include <soc/wakeup.h>
   5
   6 void wakeup(void)
   7 {
   8         if (wakeup_need_reset())
   9                 power_reset();
  10
  11         power_init();  /* Ensure ps_hold_setup() for early wakeup. */
  12         power_exit_wakeup();
  13         /* Should never return. If we do, reset. */
  14         power_reset();
  15 }
  16
  17 int get_wakeup_state(void)
  18 {
  19         uint32_t status = power_read_reset_status();
  20
  21         /* DIDLE/LPA can be resumed without clock reset (ex, bootblock),
  22          * and SLEEP requires resetting clock (should be done in ROM stage).
  23          */
  24
  25         if (status == S5P_CHECK_DIDLE || status == S5P_CHECK_LPA)
  26                 return WAKEUP_DIRECT;
  27
  28         if (status == S5P_CHECK_SLEEP)
  29                 return WAKEUP_NEED_CLOCK_RESET;
  30
  31         return IS_NOT_WAKEUP;
  32 }
  33
  34 void wakeup_enable_uart(void)
  35 {
  36         power_release_uart_retention();
  37 }