x1205 1.1 KB

1234567891011121314151617181920212223242526272829303132333435363738
  1. Kernel driver x1205
  2. ===================
  3. Supported chips:
  4. * Xicor X1205 RTC
  5. Prefix: 'x1205'
  6. Addresses scanned: none
  7. Datasheet: http://www.intersil.com/cda/deviceinfo/0,1477,X1205,00.html
  8. Authors:
  9. Karen Spearel <kas11@tampabay.rr.com>,
  10. Alessandro Zummo <a.zummo@towertech.it>
  11. Description
  12. -----------
  13. This module aims to provide complete access to the Xicor X1205 RTC.
  14. Recently Xicor has merged with Intersil, but the chip is
  15. still sold under the Xicor brand.
  16. This chip is located at address 0x6f and uses a 2-byte register addressing.
  17. Two bytes need to be written to read a single register, while most
  18. other chips just require one and take the second one as the data
  19. to be written. To prevent corrupting unknown chips, the user must
  20. explicitely set the probe parameter.
  21. example:
  22. modprobe x1205 probe=0,0x6f
  23. The module supports one more option, hctosys, which is used to set the
  24. software clock from the x1205. On systems where the x1205 is the
  25. only hardware rtc, this parameter could be used to achieve a correct
  26. date/time earlier in the system boot sequence.
  27. example:
  28. modprobe x1205 probe=0,0x6f hctosys=1