Re: Stuck creating sysfs hooks for a driver..

[Kaiwan N Billimoria <kaiwan@designergraphix.com>]

>Seewer Philippe wrote:

> Hmmm...
>
> I don't know if this'll really help, but have a look at
> drivers/firmware/edd.c

>Greg KH wrote:

> Have you read Documentation/hwmon/sysfs-interface?  I think that,
> combined with using the hwmon class code is what you want to use here.
>
> Hope this helps,
>
> greg k-h
>
>  
Thanks, yes I shall look up both these..at first glance they do look 
promising.

One thing i'd like to point out though, Greg: the LM70 is an 
SPI/Microwire based system and not i2c; so straight away, the i2c 
interface by itself will not be used...; also, the specific board 
(LM70CILD-3, which i've written the 2.4 driver for & am now porting to 
2.6), comes with a built-in parport interface..so that's what the driver 
takes into account of course..

Also it's a relatively simple temperature sensor - it does not seem to 
support hysteresis temperature, i/p voltages, etc. I'm saying all this 
as the sysfs interface i envision is just a simple read-only hook: the 
o/p value (after a little userspace massaging) is the temperature in 
Celsius correct to 0.25 degrees. So it looks to me that this particular 
driver necessitates a kind-of "custom" entry under /sys/class/hwmon with 
it's own userspace support. Do I move ahead in this direction?

Regards,
kaiwan.

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