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