LM Sensors Maintainer, I have developed an OpenIPMI kernel module for a SMBus interface that registers with the OpenIPMI driver. It uses the SMBus interfaces the I2C driver exports to communicate with a BMC (Baseboard Management Controller) on the SMBus. There are 2 modifications it requires to the i2c core: 1. The i2c_delay() inline function needs to spin delay under 2 circumstances, 1) when the system is shutting down, all processes are signaled which short circuits the current i2c_delay(). 2) when the kernel panics, the IPMI driver attempts to log a record to the SEL (System Event Log) of the BMC. In both circumstances the system is going down so the spin delay will not affect system performance. The modification includes a method to set a flag that i2c_delay() tests to see if it should spin-delay. 2. Pointers to module use count functions are needed to keep the kernel from panic-ing when modules are unloaded in an improper order. This is an enhancement I picked up from RedHat's implementation of the i2c driver, adapter, and client modules. I have modified the i801 bus driver to include these module count routines. It has also been enhanced it to include a new ICH chip. Those enhancements will be merged with the 2.8.4 release and forwarded separately. Attached are diffs of the 2.8.2 release for i2c-core.c and i2c.h that reflect the modifications described above. I hope you will consider these small enhances to the LM_Sensors project. For more information about the OpenIPMI project maintained by Corey Minyard see http://openipmi.sourceforge.net/. Thank you for your consideration. Todd C. Davis These are my opinions and absolutely not official opinions of Intel Corp. Telco Systems Development Intel Corporation, Columbia Design Center 100 Center Point Circle Suite 200, CBA-1 Columbia, SC 29210 (803) 216-2361 fax:: (803) 216-2178 mailto:todd.c.davis at intel.com -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20040220/e92279ec/attachment.html -------------- next part -------------- A non-text attachment was scrubbed... Name: linux-2.4.22-i2c-ipmismb-2.8.2.diff Type: application/octet-stream Size: 4099 bytes Desc: linux-2.4.22-i2c-ipmismb-2.8.2.diff Url : http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20040220/e92279ec/attachment.obj
