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CONFIG_JS_RTC: Enhanced Real Time Clock Support

General informations

The Linux kernel configuration item CONFIG_JS_RTC:

Help text

If you say Y here and create a character special file /dev/rtc with major number 10 and minor number 135 using mknod ("man mknod"), you will get access to the real time clock (or hardware clock) built into your computer.

Every PC has such a clock built in. It can be used to generate signals from as low as 1Hz up to 8192Hz, and can also be used as a 24 hour alarm. It reports status information via the file /proc/driver/rtc and its behaviour is set by various ioctls on /dev/rtc.

If you think you have a use for such a device (such as periodic data sampling), then say Y here, and read Documentation/rtc.txt for details.

To compile this driver as a module, choose M here: the module will be called js-rtc.

Hardware

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