include/linux/pmu.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Definitions for talking to the PMU.  The PMU is a microcontroller
0004  * which controls battery charging and system power on PowerBook 3400
0005  * and 2400 models as well as the RTC and various other things.
0006  *
0007  * Copyright (C) 1998 Paul Mackerras.
0008  */
0009 #ifndef _LINUX_PMU_H
0010 #define _LINUX_PMU_H
0011
0012 #include <linux/rtc.h>
0013 #include <uapi/linux/pmu.h>
0014
0015
0016 extern int __init find_via_pmu(void);
0017
0018 extern int pmu_request(struct adb_request *req,
0019         void (*done)(struct adb_request *), int nbytes, ...);
0020 extern int pmu_queue_request(struct adb_request *req);
0021 extern void pmu_poll(void);
0022 extern void pmu_poll_adb(void); /* For use by xmon */
0023 extern void pmu_wait_complete(struct adb_request *req);
0024
0025 /* For use before switching interrupts off for a long time;
0026  * warning: not stackable
0027  */
0028 #if defined(CONFIG_ADB_PMU)
0029 extern void pmu_suspend(void);
0030 extern void pmu_resume(void);
0031 #else
0032 static inline void pmu_suspend(void)
0033 {}
0034 static inline void pmu_resume(void)
0035 {}
0036 #endif
0037
0038 extern void pmu_enable_irled(int on);
0039
0040 extern time64_t pmu_get_time(void);
0041 extern int pmu_set_rtc_time(struct rtc_time *tm);
0042
0043 extern void pmu_restart(void);
0044 extern void pmu_shutdown(void);
0045 extern void pmu_unlock(void);
0046
0047 extern int pmu_present(void);
0048 extern int pmu_get_model(void);
0049
0050 extern void pmu_backlight_set_sleep(int sleep);
0051
0052 #define PMU_MAX_BATTERIES   2
0053
0054 /* values for pmu_power_flags */
0055 #define PMU_PWR_AC_PRESENT  0x00000001
0056
0057 /* values for pmu_battery_info.flags */
0058 #define PMU_BATT_PRESENT    0x00000001
0059 #define PMU_BATT_CHARGING   0x00000002
0060 #define PMU_BATT_TYPE_MASK  0x000000f0
0061 #define PMU_BATT_TYPE_SMART 0x00000010 /* Smart battery */
0062 #define PMU_BATT_TYPE_HOOPER    0x00000020 /* 3400/3500 */
0063 #define PMU_BATT_TYPE_COMET 0x00000030 /* 2400 */
0064
0065 struct pmu_battery_info
0066 {
0067     unsigned int    flags;
0068     unsigned int    charge;     /* current charge */
0069     unsigned int    max_charge; /* maximum charge */
0070     signed int  amperage;   /* current, positive if charging */
0071     unsigned int    voltage;    /* voltage */
0072     unsigned int    time_remaining; /* remaining time */
0073 };
0074
0075 extern int pmu_battery_count;
0076 extern struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
0077 extern unsigned int pmu_power_flags;
0078
0079 /* Backlight */
0080 extern void pmu_backlight_init(void);
0081
0082 /* some code needs to know if the PMU was suspended for hibernation */
0083 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
0084 extern int pmu_sys_suspended;
0085 #else
0086 /* if power management is not configured it can't be suspended */
0087 #define pmu_sys_suspended   0
0088 #endif
0089
0090 #endif /* _LINUX_PMU_H */