it87 and lm85 tickets

Philip Pokorny ppokorny at penguincomputing.com
Thu May 5 08:00:22 CEST 2005


Sorry, got distracted.

The one hichup I did find from going over the datasheet is that a 
previously "reserved" bit in the "Zone Range/Fan Frequency" register is 
now defined and affects the PWM frequency.  So we need to be careful to 
clear that bit or we have to extend the frequency possibilities.

Does this patch need to be for both 2.6 and 2.4/lm_sensors2?

Thanks,
:v)

Mark Studebaker wrote:

> reminder we need a patch for this from Philip - or are  you waiting 
> for verification from Reuben
> that the chip is on the board?
> ticket 1933
> mds
>
> Philip Pokorny wrote:
>
>> Reuben Farrelly wrote:
>>
>>> Hi Philip,
>>>
>>> Philip Pokorny wrote:
>>>
>>>> Jean Delvare wrote:
>>>>
>>>>>> lm85 new stepping 0x69: ticket 1933 (khali)
>>>>>>   
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> I AM NOT THE LM85 GUY!
>>>>>
>>>>> The driver was written and is maintained by Philip Pokorny and Justin
>>>>> Thiessen at Penguin Computing.
>>>>>
>>>>> #1933: [waiting for user data]
>>>>>  
>>>>>
>>>>
>>>> So, I guess I *am* the LM85 guy.
>>>>
>>>> Yes, please send or reply with 'i2c-dump 0 0x2e' when lm85 is *not* 
>>>> loaded.
>>>
>>>
>>>
>>>
>>> Here you go..
>>>
>>> [root at typhoon ~]# i2cdump 0 0x2e
>>> No size specified (using byte-data access)
>>> WARNING! This program can confuse your I2C bus, cause data loss and 
>>> worse!
>>> I will probe file /dev/i2c-0, address 0x2e, mode byte
>>> Continue? [Y/n]
>>>      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
>>> 30: 4d 4d 4d 00 00 00 00 00 00 00 00 00 00 00 01 69    MMM...........?i
>>
>>
>>
>>
>> So this says that it's a National Semiconductor part (0x3e is 0x01) 
>> and that's it's *not* an LM85 (0x3f is 0x69) but according to the 
>> lm96000 datasheet it is a superset of the lm85 functionality.  
>> Unfortunately, the only value listed for 0x3f in the lm96000 
>> datasheet is 0x68.
>>
>> So, most likely this is a later version of the lm96000.
>>
>>>
>>> Probing for `National Semiconductor LM85 or LM96000'... Success!
>>>     (confidence 7, driver `lm85')
>>
>>
>>
>>
>> That's helpful.  Thanks Khali...
>>
>>>
>>> The chip is pretty hard to locate on the board but if it's really 
>>> necessary I can try again :(
>>
>>
>>
>>
>> You might check again.  But instead of looking for a chip with 
>> "LM85", look for a 24-pin surface mount package with "LM96???" on 
>> it.  It will be smaller than the keys on your keyboard, but larger 
>> than the tip of a pen or pencil.
>>
>> I'll review the LM96000 datasheet and see if there is any additional 
>> functionality we might want to add to the lm85 driver.
>>
>> :v)
>>
>
>



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