@@ -18,14 +18,14 @@ Date: March 2006
KernelVersion: 2.6.17
Contact: linux-rtc@vger.kernel.org
Description:
- RTC-provided date in YYYY-MM-DD format
+ (RO) RTC-provided date in YYYY-MM-DD format
What: /sys/class/rtc/rtcX/hctosys
Date: September 2009
KernelVersion: 2.6.32
Contact: linux-rtc@vger.kernel.org
Description:
- 1 if the RTC provided the system time at boot via the
+ (RO) 1 if the RTC provided the system time at boot via the
CONFIG_RTC_HCTOSYS kernel option, 0 otherwise
What: /sys/class/rtc/rtcX/max_user_freq
@@ -33,7 +33,7 @@ Date: October 2007
KernelVersion: 2.6.24
Contact: linux-rtc@vger.kernel.org
Description:
- The maximum interrupt rate an unprivileged user may request
+ (RW) The maximum interrupt rate an unprivileged user may request
from this RTC.
What: /sys/class/rtc/rtcX/name
@@ -41,58 +41,60 @@ Date: March 2006
KernelVersion: 2.6.17
Contact: linux-rtc@vger.kernel.org
Description:
- The name of the RTC corresponding to this sysfs directory
+ (RO) The name of the RTC corresponding to this sysfs directory
What: /sys/class/rtc/rtcX/range
Date: January 2018
KernelVersion: 4.16
Contact: linux-rtc@vger.kernel.org
Description:
- Valid time range for the RTC, as seconds from epoch, formatted
- as [min, max]
+ (RO) Valid time range for the RTC, as seconds from epoch,
+ formatted as [min, max]
What: /sys/class/rtc/rtcX/since_epoch
Date: March 2006
KernelVersion: 2.6.17
Contact: linux-rtc@vger.kernel.org
Description:
- RTC-provided time as the number of seconds since the epoch
+ (RO) RTC-provided time as the number of seconds since the epoch
What: /sys/class/rtc/rtcX/time
Date: March 2006
KernelVersion: 2.6.17
Contact: linux-rtc@vger.kernel.org
Description:
- RTC-provided time in 24-hour notation (hh:mm:ss)
+ (RO) RTC-provided time in 24-hour notation (hh:mm:ss)
What: /sys/class/rtc/rtcX/*/nvmem
Date: February 2016
KernelVersion: 4.6
Contact: linux-rtc@vger.kernel.org
Description:
- The non volatile storage exported as a raw file, as described in
- Documentation/nvmem/nvmem.txt
+ (RW) The non volatile storage exported as a raw file, as
+ described in Documentation/nvmem/nvmem.txt
What: /sys/class/rtc/rtcX/offset
Date: February 2016
KernelVersion: 4.6
Contact: linux-rtc@vger.kernel.org
Description:
- The amount which the rtc clock has been adjusted in firmware.
- Visible only if the driver supports clock offset adjustment.
- The unit is parts per billion, i.e. The number of clock ticks
- which are added to or removed from the rtc's base clock per
- billion ticks. A positive value makes a day pass more slowly,
- longer, and a negative value makes a day pass more quickly.
+ (RW) The amount which the rtc clock has been adjusted in
+ firmware. Visible only if the driver supports clock offset
+ adjustment. The unit is parts per billion, i.e. The number of
+ clock ticks which are added to or removed from the rtc's base
+ clock per billion ticks. A positive value makes a day pass more
+ slowly, longer, and a negative value makes a day pass more
+ quickly.
What: /sys/class/rtc/rtcX/wakealarm
Date: February 2007
KernelVersion: 2.6.20
Contact: linux-rtc@vger.kernel.org
Description:
- The time at which the clock will generate a system wakeup event.
- This is a one shot wakeup event, so must be reset after wake if
- a daily wakeup is required. Format is seconds since the epoch by
- default, or if there's a leading +, seconds in the future, or if
- there is a leading +=, seconds ahead of the current alarm.
+ (RW) The time at which the clock will generate a system wakeup
+ event. This is a one shot wakeup event, so must be reset after
+ wake if a daily wakeup is required. Format is seconds since the
+ epoch by default, or if there's a leading +, seconds in the
+ future, or if there is a leading +=, seconds ahead of the
+ current alarm.
Annotate the sysfs interface of rtc with file specific permissions (RO/RW). Signed-off-by: Aishwarya Pant <aishpant@gmail.com> --- Documentation/ABI/testing/sysfs-class-rtc | 44 ++++++++++++++++--------------- 1 file changed, 23 insertions(+), 21 deletions(-)