linux-kernel - Re: [PATCH] powerpc: dts: turris1x.dts: Add channel labels for temperature sensor

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Date:   Sun, 9 Oct 2022 14:05:06 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org,
        Marek Behún <kabel@...nel.org>,
        Josef Schlehofer <josef.schlehofer@....cz>
Subject: Re: [PATCH] powerpc: dts: turris1x.dts: Add channel labels for
 temperature sensor

On Friday 30 September 2022 14:46:18 Pali Rohár wrote:
> + CC hwmon ML
> 
> On Friday 30 September 2022 14:39:01 Pali Rohár wrote:
> > Channel 0 of SA56004ED chip refers to internal SA56004ED chip sensor (chip
> > itself is located on the board) and channel 1 of SA56004ED chip refers to
> > external sensor which is connected to temperature diode of the P2020 CPU.
> > 
> > Fixes: 54c15ec3b738 ("powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers")
> > Signed-off-by: Pali Rohár <pali@...nel.org>
> > ---
> > With this change userspace 'sensors' applications prints labels:
> > 
> >     $ sensors
> >     sa56004-i2c-0-4c
> >     Adapter: MPC adapter (i2c@...0)
> >     board:        +34.2°C  (low  =  +0.0°C, high = +70.0°C)
> >                            (crit = +85.0°C, hyst = +75.0°C)
> >     cpu:          +58.9°C  (low  =  +0.0°C, high = +70.0°C)
> >                            (crit = +85.0°C, hyst = +75.0°C)
> > 
> > And without this change it prints just generic tempX names:
> > 
> >     $ sensors
> >     sa56004-i2c-0-4c
> >     Adapter: MPC adapter (i2c@...0)
> >     temp1:        +43.0°C  (low  =  +0.0°C, high = +70.0°C)
> >                            (crit = +85.0°C, hyst = +75.0°C)
> >     temp2:        +63.4°C  (low  =  +0.0°C, high = +70.0°C)
> >                            (crit = +85.0°C, hyst = +75.0°C)
> > ---
> >  arch/powerpc/boot/dts/turris1x.dts | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/arch/powerpc/boot/dts/turris1x.dts b/arch/powerpc/boot/dts/turris1x.dts
> > index 4033c554b06a..5b5278c32e43 100644
> > --- a/arch/powerpc/boot/dts/turris1x.dts
> > +++ b/arch/powerpc/boot/dts/turris1x.dts
> > @@ -69,6 +69,20 @@
> >  				interrupt-parent = <&gpio>;
> >  				interrupts = <12 IRQ_TYPE_LEVEL_LOW>, /* GPIO12 - ALERT pin */
> >  					     <13 IRQ_TYPE_LEVEL_LOW>; /* GPIO13 - CRIT pin */
> > +				#address-cells = <1>;
> > +				#size-cells = <0>;
> > +
> > +				/* Local temperature sensor (SA56004ED internal) */
> > +				channel@0 {
> > +					reg = <0>;
> > +					label = "board";
> > +				};
> > +
> > +				/* Remote temperature sensor (D+/D- connected to P2020 CPU Temperature Diode) */
> > +				channel@1 {
> > +					reg = <1>;
> > +					label = "cpu";
> > +				};
> 
> I'm not sure if you want UPPERCASE, lowercase, PascalCase, kebab-case
> or snake_case format of labels. Or if you want also "temp" or
> "temperature" keyword in the label. So please adjust label to the
> preferred one, if proposed format is not the correct.

Ok, if nobody complains then please take this patch as is.

> >  			};
> >  
> >  			/* DDR3 SPD/EEPROM */
> > -- 
> > 2.20.1
> >