linux-kernel - Re: [PATCH v4 11/18] dt-bindings: power: supply: add AXP20X/AXP22X battery DT binding

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Date:   Wed, 15 Mar 2017 23:28:52 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     Quentin Schulz <quentin.schulz@...e-electrons.com>
Cc:     icenowy@...c.xyz, bonbons@...ux-vserver.org, robh+dt@...nel.org,
        mark.rutland@....com, wens@...e.org, linux@...linux.org.uk,
        maxime.ripard@...e-electrons.com, jic23@...nel.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        lee.jones@...aro.org, liam@...workimprov.net,
        thomas.petazzoni@...e-electrons.com, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-iio@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v4 11/18] dt-bindings: power: supply: add AXP20X/AXP22X
 battery DT binding

Hi,

On Wed, Mar 15, 2017 at 11:55:30AM +0100, Quentin Schulz wrote:
> The X-Powers AXP20X and AXP22X PMICs can have a battery as power supply.
> 
> This patch adds the DT binding documentation for the battery power
> supply which gets various data from the PMIC, such as the battery status
> (charging, discharging, full, dead), current max limit, current current,
> battery capacity (in percentage), voltage max and min limits, current
> voltage and battery capacity (in Ah).
> 
> Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
> Acked-by: Chen-Yu Tsai <wens@...e.org>
> Acked-by: Maxime Ripard <maxime.ripard@...e-electrons.com>

I suggest to do "s/battery-power-supply/battery-fuel-gauge/g"

> ---
> 
> v4:
>  - added monitored-battery optional property,
>  - added example with battery,
> 
> v3:
>  - removed constant charge current property, now should use the WIP
>  battery framework,
> 
> v2:
>  - changed DT node name from ac_power_supply to ac-power-supply,

ac-power-supply?

-- Sebastian

>  - removed io-channels and io-channel-names from DT (the IIO mapping is
>  done in the IIO ADC driver now),
>  - added x-powers,constant-charge-current property to set the maximal
>  default constant current charge of the battery,
>  .../bindings/power/supply/axp20x_battery.txt       | 30 ++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/axp20x_battery.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt b/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt
> new file mode 100644
> index 0000000..89cb7a2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/axp20x_battery.txt
> @@ -0,0 +1,30 @@
> +AXP20x and AXP22x battery power supply
> +
> +Required Properties:
> + - compatible, one of:
> +			"x-powers,axp209-battery-power-supply"
> +			"x-powers,axp221-battery-power-supply"
> +
> +Optional properties:
> + - monitored-battery, phandle to a fixed battery
> +
> +This node is a subnode of the axp20x/axp22x PMIC.
> +
> +The AXP20X and AXP22X can read the battery voltage, charge and discharge
> +currents of the battery by reading ADC channels from the AXP20X/AXP22X
> +ADC.
> +
> +Example:
> +
> +battery: battery {
> +	compatible = "fixed-battery";
> +	voltage-min-design-microvolt = <3200000>;
> +	constant-charge-microamp = <300000>;
> +};
> +
> +&axp209 {
> +	battery_power_supply: battery-power-supply {
> +		compatible = "x-powers,axp209-battery-power-supply";
> +		monitored-battery = <&battery>;
> +	}
> +};
> -- 
> 2.9.3
> 

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