linux-kernel - Re: [linux-sunxi] [RESEND PATCH] ARM: dts: sun7i: olimex-lime2: Enable ac and power supplies

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Message-ID: <20190528134342.25fep6kpmrr4p7vw@plaes.org>
Date:   Tue, 28 May 2019 13:43:42 +0000
From:   Priit Laes <plaes@...es.org>
To:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [linux-sunxi] [RESEND PATCH] ARM: dts: sun7i: olimex-lime2:
 Enable ac and power supplies

On Tue, May 28, 2019 at 02:58:57PM +0200, Paul Kocialkowski wrote:
> Hi,
> 
> On Tue, 2019-05-28 at 09:35 +0300, Priit Laes wrote:
> > Lime2 has battery connector so enable these supplies.
> 
> Out of curiosity, what is reported to userspace when no battery is
> attached?

Data from /sys/class/power_supply/axp20x-battery:

[snip]
$ for i in $(ls -1); do echo "cat $i"; cat $i; done

cat capacity
100
cat constant_charge_current
1200000
cat constant_charge_current_max
1200000
cat current_now
0
cat health
Good
cat online
0
cat present
0
cat status
Not charging
cat type
Battery
cat uevent
POWER_SUPPLY_NAME=axp20x-battery
POWER_SUPPLY_PRESENT=0
POWER_SUPPLY_ONLINE=0
POWER_SUPPLY_STATUS=Not charging
POWEROSUPPLY_VOLTAGE_NOW=0
POWER_SUPPLY_CURRENT_NOW=0
POWER_SUPPLY_CON/TANT_CHARGE_CURRENT=1200000
POWER_SUPPLY_CONSTANT_CHARGE_CURRENT_MAX=1200000
POWER_SUPPLY_HEALTH=Good
POWER_SUPPLY_VOLTAGE_MAXODESIGN=4200000
POWEROSUPPLY_VOLTAGE_MIN_DESIGN=2900000
POWER_SUPPLY_CAPACITY=100
cat voltage_max_design
4200000
cat voltage_min_design
2900000
cat voltage_now
0
[/snip]

> Looks good otherwise:
> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> 
> Cheers,
> 
> Paul
> 
> > Signed-off-by: Priit Laes <plaes@...es.org>
> > ---
> >  arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> > index 9c8eecf4337a..9001b5527615 100644
> > --- a/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> > +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> > @@ -206,6 +206,14 @@
> >  
> >  #include "axp209.dtsi"
> >  
> > +&ac_power_supply {
> > +	status = "okay";
> > +};
> > +
> > +&battery_power_supply {
> > +	status = "okay";
> > +};
> > +
> >  &reg_dcdc2 {
> >  	regulator-always-on;
> >  	regulator-min-microvolt = <1000000>;
> > -- 
> > 2.11.0
> > 
> -- 
> Paul Kocialkowski, Bootlin
> Embedded Linux and kernel engineering
> https://bootlin.com
>