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