[lm-sensors] [PATCH] Support for DS75 thermal sensor

Wolfgang Grandegger wg at grandegger.com
Tue Jul 8 15:38:14 CEST 2008


Jean Delvare wrote:
> On Tue, 08 Jul 2008 15:09:32 +0200, Wolfgang Grandegger wrote:
>> Jean Delvare wrote:
>>> On Tue, 08 Jul 2008 11:22:36 +0200, Wolfgang Grandegger wrote:
>>>> The existing driver for the LM75 is unable to identify a compatible DS75 
>>>> device properly. This patch from
>>>>
>>>> http://lists.lm-sensors.org/pipermail/lm-sensors/2007-February/018838.html 
>>>>
>>>> does fix the problem and I wonder why it did not make it into the kernel yet.
>>> Because meanwhile the lm75 driver was converted to a new-style
>>> i2c driver, with support for the DS75:
>>>
>>> http://lm-sensors.org/kernel?p=kernel/mhoffman/hwmon-2.6.git;a=commit;h=ea6db11742de63324f29d1383122657cabe90940
>>>
>>> This will presumably go in kernel 2.6.27-rc1.
>> Ah, thanks for the info. Unfortunately, this new driver does not work 
>> with the DS75 on our custom board. THe identification fails, because 
>> it's as in the old lm75.c driver (and not like Alan suggested).
> 
> There's no "detection" involved for the new-style i2c devices.
> Presumably you are still using the old binding model, not taking
> benefit of the patch at all. Use i2c_register_board_info() to
> instantiate your "ds75" i2c device from you board's platform code, and
> it should work.


OK, I see. For my board I need to add a FDT node to the DTS file and add 
some binding code like for the RTC. For the lm75, it still works without 
that.

Wolfgang.






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