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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/linux/rtc.h
2 * Generic RTC interface.
3 * This version contains the part of the user interface to the Real Time Clock
4 * service. It is used with both the legacy mc146818 and also EFI
5 * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
6 * from <linux/mc146818rtc.h> to this file for 2.4 kernels.
8 * Copyright (C) 1999 Hewlett-Packard Co.
9 * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com>
15 * The struct used to pass data via the following ioctl. Similar to the
16 * struct tm in <time.h>, but it needs to be here so that the kernel
17 * source is self contained, allowing cross-compiles, etc. etc.
33 * This data structure is inspired by the EFI (v0.92) wakeup
37 unsigned char enabled
; /* 0 = alarm disable, 1 = alarm disabled */
38 unsigned char pending
; /* 0 = alarm pending, 1 = alarm not pending */
39 struct rtc_time time
; /* time the alarm is set to */
43 * Data structure to control PLL correction some better RTC feature
44 * pll_value is used to get or set current value of correction,
45 * the rest of the struct is used to query HW capabilities.
46 * This is modeled after the RTC used in Q40/Q60 computers but
47 * should be sufficiently flexible for other devices
49 * +ve pll_value means clock will run faster by
50 * pll_value*pll_posmult/pll_clock
51 * -ve pll_value means clock will run slower by
52 * pll_value*pll_negmult/pll_clock
56 int pll_ctrl
; /* placeholder for fancier control */
57 int pll_value
; /* get/set correction value */
58 int pll_max
; /* max +ve (faster) adjustment value */
59 int pll_min
; /* max -ve (slower) adjustment value */
60 int pll_posmult
; /* factor for +ve correction */
61 int pll_negmult
; /* factor for -ve correction */
62 long pll_clock
; /* base PLL frequency */
66 * ioctl calls that are permitted to the /dev/rtc interface, if
67 * any of the RTC drivers are enabled.
70 #define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */
71 #define RTC_AIE_OFF _IO('p', 0x02) /* ... off */
72 #define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
73 #define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
74 #define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */
75 #define RTC_PIE_OFF _IO('p', 0x06) /* ... off */
76 #define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */
77 #define RTC_WIE_OFF _IO('p', 0x10) /* ... off */
79 #define RTC_ALM_SET _IOW('p', 0x07, struct rtc_time) /* Set alarm time */
80 #define RTC_ALM_READ _IOR('p', 0x08, struct rtc_time) /* Read alarm time */
81 #define RTC_RD_TIME _IOR('p', 0x09, struct rtc_time) /* Read RTC time */
82 #define RTC_SET_TIME _IOW('p', 0x0a, struct rtc_time) /* Set RTC time */
83 #define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */
84 #define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */
85 #define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */
86 #define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */
88 #define RTC_WKALM_SET _IOW('p', 0x0f, struct rtc_wkalrm)/* Set wakeup alarm*/
89 #define RTC_WKALM_RD _IOR('p', 0x10, struct rtc_wkalrm)/* Get wakeup alarm*/
91 #define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
92 #define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
96 typedef struct rtc_task
{
97 void (*func
)(void *private_data
);
101 int rtc_register(rtc_task_t
*task
);
102 int rtc_unregister(rtc_task_t
*task
);
103 int rtc_control(rtc_task_t
*t
, unsigned int cmd
, unsigned long arg
);
104 void rtc_get_rtc_time(struct rtc_time
*rtc_tm
);
106 #endif /* __KERNEL__ */
108 #endif /* _LINUX_RTC_H_ */