Re: [PATCH 6/6 V4] hwmon: OMAP4: On die temperature sensor driver

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 31 Aug 2011, Guenter Roeck wrote:

> On Wed, Aug 31, 2011 at 08:36:43PM -0400, Paul Walmsley wrote:
> > Hi
> > 
> > Some comments.
> > 
> > On Wed, 31 Aug 2011, Keerthy wrote:
> > 
> [ ... ]
> > 
> > > +}
> > > +
> > > +/* Sysfs hook functions */
> > 
> > These should be conditionally compiled out if sysfs isn't compiled in.
> > 
> The whole point of the hwmon subsystem is to expose hardware monitoring information
> to userland using sysfs. hwmon without sysfs doesn't make sense.
> 
> So, if anything, it might make sense to disable the entire hwmon tree if sysfs is disabled.
> But please no conditionals in the code.

Hmm.  This IP block is more than just a sensor.  It also can interrupt the 
CPU and/or trigger a GPIO line (to shut down the chip) if the chip 
temperature crosses some thresholds.  On some OMAPs, the thresholds are 
fixed; on others, they are software-programmable.  That functionality 
shouldn't require sysfs; it's almost closer to an x86 MCE.

So based on your comments, it sounds like we should move that part of the 
code to a different driver, and just leave the basic software thermal 
monitoring here?


- Paul
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux