linux-kernel - Re: [PATCH v2] thermal: add sysfs

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Message-ID: <1459357591.13525.62.camel@linux.intel.com>
Date:	Wed, 30 Mar 2016 10:06:31 -0700
From:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:	Eduardo Valentin <edubezval@...il.com>
Cc:	"Zhang, Rui" <rui.zhang@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"srikars@...dia.com" <srikars@...dia.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"mlongnecker@...dia.com" <mlongnecker@...dia.com>
Subject: Re: [PATCH v2] thermal: add sysfs_notify on some attributes

On Mon, 2016-03-28 at 18:35 -0700, Eduardo Valentin wrote:
> On Tue, Mar 15, 2016 at 11:08:00PM +0000, Pandruvada, Srinivas wrote:
> > 
> > On Mon, 2016-03-14 at 11:12 -0700, Srikar Srimath Tirumala wrote:
> > > 
> > > 
[...]
> > 
> The complexity of such communication (or even the current status of
> sysfs ABI) starts to reach limit of such channel. We may definitely
> consider other means, such as /dev interface, just like IIO does.
Yes. Instead of loading netlink I/F, we need to have thermal channel to
notify.

> > During last LPC we discussed about using IIO for temperature
> > threshold
> > notifications and I submitted multiple changes for that. Looks like
> > we
> > also care of trip point changes. So I think we need more
> > comprehensive
> > mechanism to address this.
> > 
> > May be we should have thermal mini summit during LPC again and
> > decide a
> > comprehensive plan to address all asynchronous thermal
> > notifications.
> > 
> I have created a wiki for LPC 2016
> http://wiki.linuxplumbersconf.org/2016:thermal
> 
> Overall I believe we need to solve the (temperature) sensing in a
> more
> structured way within the kernel. We have three subsystem that allow
> performing temperature sensing. They are different in design and
> concept, but still solve similar problems.
> 
> Again, please lets generate enough quorum to run the micro conf.
> 
I am planning to attend.

Thanks,
Srinivas
> BR, 
> 
> Eduardo Valentin