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