6 The rtc/ class subdirectory belongs to the RTC subsystem.
8 What: /sys/class/rtc/rtcX/
13 The /sys/class/rtc/rtc{0,1,2,3,...} directories correspond
16 What: /sys/class/rtc/rtcX/date
21 (RO) RTC-provided date in YYYY-MM-DD format
23 What: /sys/class/rtc/rtcX/hctosys
28 (RO) 1 if the RTC provided the system time at boot via the
29 CONFIG_RTC_HCTOSYS kernel option, 0 otherwise
31 What: /sys/class/rtc/rtcX/max_user_freq
36 (RW) The maximum interrupt rate an unprivileged user may request
39 What: /sys/class/rtc/rtcX/name
44 (RO) The name of the RTC corresponding to this sysfs directory
46 What: /sys/class/rtc/rtcX/range
51 Valid time range for the RTC, as seconds from epoch, formatted
54 What: /sys/class/rtc/rtcX/since_epoch
59 (RO) RTC-provided time as the number of seconds since the epoch
61 What: /sys/class/rtc/rtcX/time
66 (RO) RTC-provided time in 24-hour notation (hh:mm:ss)
68 What: /sys/class/rtc/rtcX/offset
73 (RW) The amount which the rtc clock has been adjusted in
74 firmware. Visible only if the driver supports clock offset
75 adjustment. The unit is parts per billion, i.e. The number of
76 clock ticks which are added to or removed from the rtc's base
77 clock per billion ticks. A positive value makes a day pass more
78 slowly, longer, and a negative value makes a day pass more
81 What: /sys/class/rtc/rtcX/wakealarm
86 (RW) The time at which the clock will generate a system wakeup
87 event. This is a one shot wakeup event, so must be reset after
88 wake if a daily wakeup is required. Format is seconds since the
89 epoch by default, or if there's a leading +, seconds in the
90 future, or if there is a leading +=, seconds ahead of the