linux-kernel - Re: [PATCH v3 1/4] dt-bindings: power: supply: add battery charge voltage/current

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Message-ID: <CAKvHMgTvUkJENP=Y_rdge6Oqq-La341nYW5prB=BpXWo7rF-0A@mail.gmail.com>
Date:   Fri, 26 May 2017 14:20:02 -0700
From:   Liam Breck <liam@...workimprov.net>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Liam Breck <kernel@...workimprov.net>
Subject: Re: [PATCH v3 1/4] dt-bindings: power: supply: add battery charge voltage/current

Hi Enric,

On Fri, May 26, 2017 at 4:04 AM, Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
> Add charging voltage and current characteristics to the battery DT for
> proper handling of the battery by fuel-gauge and charger chips.
>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> Changes since v2:
>  - Requested by Sebastian Reichel
>    - Move to its own patch and apply to simple-battery framework.
> Changes since v1:
>  - Requested by Rob Herring
>    - Rename ti,charge-* to charge-* to be standard properties.
>    - Use unit suffixes as per bindings/property-units.txt
>
>  Documentation/devicetree/bindings/power/supply/battery.txt | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/power/supply/battery.txt b/Documentation/devicetree/bindings/power/supply/battery.txt
> index 63a7028..c87a439 100644
> --- a/Documentation/devicetree/bindings/power/supply/battery.txt
> +++ b/Documentation/devicetree/bindings/power/supply/battery.txt
> @@ -12,6 +12,8 @@ Optional Properties:
>   - voltage-min-design-microvolt: drained battery voltage
>   - energy-full-design-microwatt-hours: battery design energy
>   - charge-full-design-microamp-hours: battery design capacity
> + - charge-voltage-microvolt: battery charging voltage
> + - charge-current-microamp: battery charging current

I think you mean constant-charge-* which is how you surface these
properties in your tps65217_charger patch.

I'll add these to v14 of my patchset which adds simple-battery
support. Rob requested a single patch for this file.

I've been waiting for feedback on v13.2 from Sebastian. If I don't
hear from him within a few days, I'll post v14.

>  Batteries must be referenced by chargers and/or fuel-gauges
>  using a phandle. The phandle's property should be named
> @@ -24,6 +26,8 @@ Example:
>                 voltage-min-design-microvolt = <3200000>;
>                 energy-full-design-microwatt-hours = <5290000>;
>                 charge-full-design-microamp-hours = <1430000>;
> +               charge-voltage-microvolt = <4100000>;
> +               charge-current-microamp = <300000>;
>         };
>
>         charger: charger@11 {
> --
> 2.9.3
>