diff options
author | Len Brown <len.brown@intel.com> | 2005-12-06 17:31:30 -0500 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2005-12-06 17:31:30 -0500 |
commit | 3d5271f9883cba7b54762bc4fe027d4172f06db7 (patch) | |
tree | ab8a881a14478598a0c8bda0d26c62cdccfffd6d /Documentation/i2c/chips/x1205 | |
parent | 378b2556f4e09fa6f87ff0cb5c4395ff28257d02 (diff) | |
parent | 9115a6c787596e687df03010d97fccc5e0762506 (diff) | |
download | kernel-crypto-3d5271f9883cba7b54762bc4fe027d4172f06db7.tar.gz kernel-crypto-3d5271f9883cba7b54762bc4fe027d4172f06db7.tar.xz kernel-crypto-3d5271f9883cba7b54762bc4fe027d4172f06db7.zip |
Pull release into acpica branch
Diffstat (limited to 'Documentation/i2c/chips/x1205')
-rw-r--r-- | Documentation/i2c/chips/x1205 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/i2c/chips/x1205 b/Documentation/i2c/chips/x1205 new file mode 100644 index 00000000000..09407c991fe --- /dev/null +++ b/Documentation/i2c/chips/x1205 @@ -0,0 +1,38 @@ +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 |