ac75779b72
Switch the parent of the nvmem device to the parent of the rtc device so it can be registered before the RTC. This is a small change in the ABI as the nvmem moves out of the /sys/class/rtc/rtcX folder to be under the parent device folder (that is where the previous nvram files where registered). However, it is still available under its correct location, /sys/bus/nvmem/devices which is the one that should be used by userspace applications. The other benefit is that the nvmem device can stay registered even if the rtc registration fails. Or it is possible to not register the rtc if the nvmem registration failed. Finally, it makes a lot of sense for devices that actually have different i2c or spi addresses for the RTC and the EEPROM. That is basically how it would end up when using MFD or even completely separate devices. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
84 lines
2.5 KiB
Plaintext
84 lines
2.5 KiB
Plaintext
What: /sys/class/rtc/
|
|
Date: March 2006
|
|
KernelVersion: 2.6.17
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
The rtc/ class subdirectory belongs to the RTC subsystem.
|
|
|
|
What: /sys/class/rtc/rtcX/
|
|
Date: March 2006
|
|
KernelVersion: 2.6.17
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
The /sys/class/rtc/rtc{0,1,2,3,...} directories correspond
|
|
to each RTC device.
|
|
|
|
What: /sys/class/rtc/rtcX/date
|
|
Date: March 2006
|
|
KernelVersion: 2.6.17
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
(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:
|
|
(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
|
|
Date: October 2007
|
|
KernelVersion: 2.6.24
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
(RW) The maximum interrupt rate an unprivileged user may request
|
|
from this RTC.
|
|
|
|
What: /sys/class/rtc/rtcX/name
|
|
Date: March 2006
|
|
KernelVersion: 2.6.17
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
(RO) The name of the RTC corresponding to this sysfs directory
|
|
|
|
What: /sys/class/rtc/rtcX/since_epoch
|
|
Date: March 2006
|
|
KernelVersion: 2.6.17
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
(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:
|
|
(RO) RTC-provided time in 24-hour notation (hh:mm:ss)
|
|
|
|
What: /sys/class/rtc/rtcX/offset
|
|
Date: February 2016
|
|
KernelVersion: 4.6
|
|
Contact: linux-rtc@vger.kernel.org
|
|
Description:
|
|
(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:
|
|
(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.
|