linux-kernel - Re: [PATCH] dt-bindings: hwmon: tmp108: add optional interrupts and #thermal-sensor-cells

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Message-ID: <20181107213831.GA14140@roeck-us.net>
Date:   Wed, 7 Nov 2018 13:38:32 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Heiko Stübner <heiko@...ech.de>
Cc:     jdelvare@...e.com, robh+dt@...nel.org, mark.rutland@....com,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: hwmon: tmp108: add optional interrupts and
 #thermal-sensor-cells

On Wed, Nov 07, 2018 at 10:33:12PM +0100, Heiko Stübner wrote:
> Hi Guenter,
> 
> Am Mittwoch, 7. November 2018, 19:39:58 CET schrieb Guenter Roeck:
> > On Wed, Nov 07, 2018 at 04:47:08PM +0100, Heiko Stuebner wrote:
> > > From: Heiko Stuebner <heiko.stuebner@...com>
> > > 
> > > The tmp108 does have an alert output that can be used as interrupt source
> > > and can of course also be used as part of a thermal sensor setup for
> > > things
> > > like thermal-based cpu frequencies, so document the necessary properties.
> > > 
> > > Signed-off-by: Heiko Stuebner <heiko.stuebner@...com>
> > 
> > Do you also plan to actually implement interrupt support in the driver ?
> 
> Not right now but I'm hoping down the road.
> 
> The main argument for including this standard property is that
> the dt-binding is of course a description of the hardware and not the
> state of the linux driver and the tmp108 obviously has that alert output
> pin, hence I'd really like to already have it in the new board-dts I'm
> currently working on so it simply magically works once the driver can
> use it :-) .
> 
NP, just asking. Let's wait for Rob's review, then I'll apply the patch
unless he has issues.

Thanks,
Guenter

> 
> Heiko
> 
> > > ---
> > > 
> > >  Documentation/devicetree/bindings/hwmon/tmp108.txt | 4 ++++
> > >  1 file changed, 4 insertions(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/hwmon/tmp108.txt
> > > b/Documentation/devicetree/bindings/hwmon/tmp108.txt index
> > > 8c4b10df86d9..54d4beed4ee5 100644
> > > --- a/Documentation/devicetree/bindings/hwmon/tmp108.txt
> > > +++ b/Documentation/devicetree/bindings/hwmon/tmp108.txt
> > > 
> > > @@ -7,6 +7,10 @@ Requires node properties:
> > >  - compatible : "ti,tmp108"
> > >  - reg : the I2C address of the device. This is 0x48, 0x49, 0x4a, or 0x4b.
> > > 
> > > +Optional properties:
> > > +- interrupts: Reference to the TMP108 alert interrupt.
> > > +- #thermal-sensor-cells: should be set to 0.
> > > +
> > > 
> > >  Example:
> > >  	tmp108@48 {
> > >  	
> > >  		compatible = "ti,tmp108";
> 
> 
> 
>