I think one of the other bits in LM85_REG_CONFIG is the reset bit. If set, the chip resets to it's power-on defaults and clears the LOCK bit. I don't have my documentation handy right now so I can't tell you for sure which bit it is. I suppose I should have created #defines for each of the bits in REG_CONFIG. Oops... :v) Dimitri Puzin wrote: > Hello, > > thank you for the fast reply. I have read the source code and also > the docs for the chip. Unfortunately I couldn't find a reset function > on the lm85 chip. National mentioned that only power-cycling > can clear the locks set :(. It looks like the BIOS initialize the chip > during the POST. I tried to play with the settings in the BIOS but > even disabling the fan control function completely didn't prevent > the LOCK bit at 0x40 being set. I'm not a great specialist, maybe > you know of another way? a function the i2c-i801 or a register which > must be set in the bridge? I tried the original tool which is suggested > by Intel but they also don't allow the setting. Only the alarm > levels for voltage (max/min) and the thresholds for zones can be > adjusted. If there is any way to make it work I would add the needed > code to the sources. > > I think this fact about a possible lock on the chip > should be added to the docs of lm85 driver. In the source I read > that the init function checks for the setting but it's not mentioned > in the docs. > > ----- Original Message ----- > From: "Philip Pokorny" <ppokorny at penguincomputing.com> > To: "Dimitri Puzin" <tristan-777 at t-online.de> > Cc: <lm78 at Stimpy.netroedge.com> > Sent: Thursday, October 02, 2003 9:56 PM > Subject: Re: Intel D845GEBV2 with lm85: config is locked > > > >>The LM85 driver is telling you that the BIOS has locked the config. >>When the LM85 config is locked, you can't change any of the pwm settings >>or limits. >> >> > lm85: Assigning ID 0 to National LM85-B at 0,0x2e >> > lm85(0): Client (0,0x2e) config is locked. >> >>You can clear the lock by completely resetting the chip, but then you >>loose whatever limits may have been set and any pin configuration >>options that have been programmed. >> >>We have seen that Intel motherboards implement SMBUS interrupts. That >>means that if an ALARM is generated by an i2c device, the BIOS can (and >>will) shutdown your system. Resetting the chip might trigger the BIOS >>to shutdown your system. >> >>Does the BIOS allow you to control the automatic fan speed control >>features of the lm85? If so, I would recommend that you set the values >>there and then use lm_sensors to view the values. >> >>If you're interested in working on the driver, you could implement some >>code to reset the chip and then reprogram the configuration to match the >>Intel BIOS setup without locking the config. Then you would be able to >>change the PWM values. You can set the limits from user space using >>'sensors -s' If it doesn't shut your system down, then you've got what >>you want. >> >> >> >>Dimitri Puzin wrote: >> >>>Hello, >>> >>>I've got an Intel mainboard D845GEBV2 as replacement for my Asus >> > P4B-266SE > >>>(that ASB100 mess). I've mounted it, gone through the configs and >>>sensors-detect said I should use the lm85 driver. With lm85 it seem to >> > work > >>>well, except I cannot change anything in the proc interface. The values >>>reported seem correct but all changes (e.g. echoing values to the pwm# >>>registers) are ignored... As far as I can see from the BIOS, that board >> > has > >>>settings for fan control and speed. I guess that the BIOS initializes >> > the > >>>sensors during POST but as far as I could see, there was no change to >> > the > >>>problem even I deactivate the settings from the BIOS. I've took a look >> > at > >>>the board and found following devices I could think of being attached to >> > the > >>>bus: LM 85 BIMQ, ICS 950227 AF, FW 82801 DB, PC 87382 IBU/VLA and the >> > eeprom > >>>from the RAM. Intel claims there is an SMSC LPC47M172 on board. Here is >> > the > >>>output of what I could get from my system. >>> >>>Output of syslog >>>----------------------- >>>Oct 1 20:33:18 elexis kernel: i2c-core.o: i2c core module version 2.8.0 >>>(20030714) >>>Oct 1 20:33:18 elexis kernel: i2c-proc.o version 2.8.0 (20030714) >>>Oct 1 20:33:26 elexis kernel: i2c-dev.o: i2c /dev entries driver module >>>version 2.8.0 (20030714) >>>Oct 1 20:33:38 elexis kernel: i2c-i801 version 2.8.0 (20030714) >>>Oct 1 20:33:38 elexis kernel: i2c-dev.o: Registered 'SMBus I801 adapter >> > at > >>>e000' as minor 0 >>>Oct 1 20:34:24 elexis kernel: lm85: Version 2.8.0 (20030714) >>>Oct 1 20:34:24 elexis kernel: lm85: See >>>http://www.penguincomputing.com/lm_sensors for more info. >>>Oct 1 20:34:24 elexis kernel: lm85: Assigning ID 0 to National LM85-B >> > at > >>>0,0x2e >>>Oct 1 20:34:24 elexis kernel: lm85(0): Client (0,0x2e) config is >> > locked. > >> >> >> >>-- >>Philip Pokorny, Director of Engineering >>Tel: 415-358-2635 Fax: 415-358-2646 Toll Free: 888-PENGUIN >>PENGUIN COMPUTING, INC. >>www.penguincomputing.com >> >> > > > -- Philip Pokorny, Director of Engineering Tel: 415-358-2635 Fax: 415-358-2646 Toll Free: 888-PENGUIN PENGUIN COMPUTING, INC. www.penguincomputing.com
