include/linux/pmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Definitions for talking to the PMU.  The PMU is a microcontroller
   4  * which controls battery charging and system power on PowerBook 3400
   5  * and 2400 models as well as the RTC and various other things.
   6  *
   7  * Copyright (C) 1998 Paul Mackerras.
   8  */
   9 #ifndef _LINUX_PMU_H
  10 #define _LINUX_PMU_H
  11
  12 #include <linux/rtc.h>
  13 #include <uapi/linux/pmu.h>
  14
  15
  16 extern int find_via_pmu(void);
  17
  18 extern int pmu_request(struct adb_request *req,
  19                 void (*done)(struct adb_request *), int nbytes, ...);
  20 extern int pmu_queue_request(struct adb_request *req);
  21 extern void pmu_poll(void);
  22 extern void pmu_poll_adb(void); /* For use by xmon */
  23 extern void pmu_wait_complete(struct adb_request *req);
  24
  25 /* For use before switching interrupts off for a long time;
  26  * warning: not stackable
  27  */
  28 #if defined(CONFIG_ADB_PMU)
  29 extern void pmu_suspend(void);
  30 extern void pmu_resume(void);
  31 #else
  32 static inline void pmu_suspend(void)
  33 {}
  34 static inline void pmu_resume(void)
  35 {}
  36 #endif
  37
  38 extern void pmu_enable_irled(int on);
  39
  40 extern time64_t pmu_get_time(void);
  41 extern int pmu_set_rtc_time(struct rtc_time *tm);
  42
  43 extern void pmu_restart(void);
  44 extern void pmu_shutdown(void);
  45 extern void pmu_unlock(void);
  46
  47 extern int pmu_present(void);
  48 extern int pmu_get_model(void);
  49
  50 extern void pmu_backlight_set_sleep(int sleep);
  51
  52 #define PMU_MAX_BATTERIES       2
  53
  54 /* values for pmu_power_flags */
  55 #define PMU_PWR_AC_PRESENT      0x00000001
  56
  57 /* values for pmu_battery_info.flags */
  58 #define PMU_BATT_PRESENT        0x00000001
  59 #define PMU_BATT_CHARGING       0x00000002
  60 #define PMU_BATT_TYPE_MASK      0x000000f0
  61 #define PMU_BATT_TYPE_SMART     0x00000010 /* Smart battery */
  62 #define PMU_BATT_TYPE_HOOPER    0x00000020 /* 3400/3500 */
  63 #define PMU_BATT_TYPE_COMET     0x00000030 /* 2400 */
  64
  65 struct pmu_battery_info
  66 {
  67         unsigned int    flags;
  68         unsigned int    charge;         /* current charge */
  69         unsigned int    max_charge;     /* maximum charge */
  70         signed int      amperage;       /* current, positive if charging */
  71         unsigned int    voltage;        /* voltage */
  72         unsigned int    time_remaining; /* remaining time */
  73 };
  74
  75 extern int pmu_battery_count;
  76 extern struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
  77 extern unsigned int pmu_power_flags;
  78
  79 /* Backlight */
  80 extern void pmu_backlight_init(void);
  81
  82 /* some code needs to know if the PMU was suspended for hibernation */
  83 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
  84 extern int pmu_sys_suspended;
  85 #else
  86 /* if power management is not configured it can't be suspended */
  87 #define pmu_sys_suspended       0
  88 #endif
  89
  90 #endif /* _LINUX_PMU_H */