linux-kernel - Re: [PATCH 7/9] thermal: of: Add support for hardware-tracked trip points

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Message-ID: <20160421011230.GA118377@google.com>
Date:	Wed, 20 Apr 2016 18:12:30 -0700
From:	Brian Norris <briannorris@...omium.org>
To:	Eduardo Valentin <edubezval@...il.com>
Cc:	Caesar Wang <wxt@...k-chips.com>, Heiko Stuebner <heiko@...ech.de>,
	dianders@...omium.org, smbarber@...gle.com,
	linux-rockchip@...ts.infradead.org,
	Mikko Perttunen <mperttunen@...dia.com>,
	Paul Walmsley <pwalmsley@...dia.com>, Wei Ni <wni@...dia.com>,
	Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Sascha Hauer <kernel@...gutronix.de>
Subject: Re: [PATCH 7/9] thermal: of: Add support for hardware-tracked trip
 points

+ Sascha

On Wed, Apr 20, 2016 at 04:48:18PM -0700, Eduardo Valentin wrote:
> On Mon, Apr 18, 2016 at 11:35:59AM +0800, Caesar Wang wrote:
> > From: Mikko Perttunen <mperttunen@...dia.com>
> > 
> > This adds support for hardware-tracked trip points to the device tree
> <cut>
> 
> > diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> > index 97b86c5..6ef932a 100644
> > --- a/include/linux/thermal.h
> > +++ b/include/linux/thermal.h
> > @@ -335,12 +335,14 @@ struct thermal_genl_event {
> >   * @get_trend: a pointer to a function that reads the sensor temperature trend.
> >   * @set_emul_temp: a pointer to a function that sets sensor emulated
> >   *		   temperature.
> > + * @set_trips: a pointer to a function that set low/high trip temperature.
> >   */
> >  struct thermal_zone_of_device_ops {
> >  	int (*get_temp)(void *, int *);
> >  	int (*get_trend)(void *, long *);
> >  	int (*set_emul_temp)(void *, int);
> >  	int (*set_trip_temp)(void *, int, int);
> > +	int (*set_trips)(void *, int, int);
> 
> This is unfortunately a diverges from API available on thermal core. Can
> you please add first on thermal core then, use it in of thermal?
> 
> I don't want to have callbacks available only via of thermal. If we
> allow it, OF thermal becomes a separate API.

What ever happened to this effort?

http://thread.gmane.org/gmane.linux.power-management.general/59451

Patch 12 and 13 look to accomplish something similar, yet they do what
Eduardo suggested. I was testing that series at my previous job, but
unfortunately (for the fate of this series) I left that employer before
I could finish reviewing and testing it. Perhaps Caesar can resurrect
and test it?

Brian