diff options
Diffstat (limited to 'include/uapi/linux/rtc.h')
| -rw-r--r-- | include/uapi/linux/rtc.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/uapi/linux/rtc.h b/include/uapi/linux/rtc.h new file mode 100644 index 000000000000..f8c82e6f25d5 --- /dev/null +++ b/include/uapi/linux/rtc.h | |||
| @@ -0,0 +1,107 @@ | |||
| 1 | /* | ||
| 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. | ||
| 7 | * | ||
| 8 | * Copyright (C) 1999 Hewlett-Packard Co. | ||
| 9 | * Copyright (C) 1999 Stephane Eranian <eranian@hpl.hp.com> | ||
| 10 | */ | ||
| 11 | #ifndef _UAPI_LINUX_RTC_H_ | ||
| 12 | #define _UAPI_LINUX_RTC_H_ | ||
| 13 | |||
| 14 | /* | ||
| 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. | ||
| 18 | */ | ||
| 19 | |||
| 20 | struct rtc_time { | ||
| 21 | int tm_sec; | ||
| 22 | int tm_min; | ||
| 23 | int tm_hour; | ||
| 24 | int tm_mday; | ||
| 25 | int tm_mon; | ||
| 26 | int tm_year; | ||
| 27 | int tm_wday; | ||
| 28 | int tm_yday; | ||
| 29 | int tm_isdst; | ||
| 30 | }; | ||
| 31 | |||
| 32 | /* | ||
| 33 | * This data structure is inspired by the EFI (v0.92) wakeup | ||
| 34 | * alarm API. | ||
| 35 | */ | ||
| 36 | struct rtc_wkalrm { | ||
| 37 | unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */ | ||
| 38 | unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */ | ||
| 39 | struct rtc_time time; /* time the alarm is set to */ | ||
| 40 | }; | ||
| 41 | |||
| 42 | /* | ||
| 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 | ||
| 48 | * | ||
| 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 | ||
| 53 | */ | ||
| 54 | |||
| 55 | struct rtc_pll_info { | ||
| 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 */ | ||
| 63 | }; | ||
| 64 | |||
| 65 | /* | ||
| 66 | * ioctl calls that are permitted to the /dev/rtc interface, if | ||
| 67 | * any of the RTC drivers are enabled. | ||
| 68 | */ | ||
| 69 | |||
| 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 */ | ||
| 78 | |||
| 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 */ | ||
| 87 | |||
| 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*/ | ||
| 90 | |||
| 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 */ | ||
| 93 | |||
| 94 | #define RTC_VL_READ _IOR('p', 0x13, int) /* Voltage low detector */ | ||
| 95 | #define RTC_VL_CLR _IO('p', 0x14) /* Clear voltage low information */ | ||
| 96 | |||
| 97 | /* interrupt flags */ | ||
| 98 | #define RTC_IRQF 0x80 /* Any of the following is active */ | ||
| 99 | #define RTC_PF 0x40 /* Periodic interrupt */ | ||
| 100 | #define RTC_AF 0x20 /* Alarm interrupt */ | ||
| 101 | #define RTC_UF 0x10 /* Update interrupt for 1Hz RTC */ | ||
| 102 | |||
| 103 | |||
| 104 | #define RTC_MAX_FREQ 8192 | ||
| 105 | |||
| 106 | |||
| 107 | #endif /* _UAPI_LINUX_RTC_H_ */ | ||