linux-kernel - Re: [PATCH v3 2/6] dt-bindings: power: supply: Extend max17040 compatibility

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Message-ID: <20200713190310.GA546410@bogus>
Date:   Mon, 13 Jul 2020 13:03:10 -0600
From:   Rob Herring <robh@...nel.org>
To:     Iskren Chernev <iskren.chernev@...il.com>
Cc:     Sebastian Reichel <sre@...nel.org>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Jonathan Bakker <xc-racer2@...e.ca>,
        Vladimir Barinov <vladimir.barinov@...entembedded.com>
Subject: Re: [PATCH v3 2/6] dt-bindings: power: supply: Extend max17040
 compatibility

On Wed, Jun 24, 2020 at 06:56:29PM +0300, Iskren Chernev wrote:
> Maxim max17040 is a fuel gauge from a larger family utilising the Model
> Gauge technology. Document all different compatible strings that the
> max17040 driver recognizes.
> 
> Some devices in the wild report double the capacity. The
> maxim,double-soc (from State-Of-Charge) property fixes that.
> 
> Signed-off-by: Iskren Chernev <iskren.chernev@...il.com>
> ---
>  .../bindings/power/supply/max17040_battery.txt    | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/max17040_battery.txt b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
> index 4e0186b8380fa..554bce82a08e6 100644
> --- a/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
> +++ b/Documentation/devicetree/bindings/power/supply/max17040_battery.txt
> @@ -2,7 +2,9 @@ max17040_battery
>  ~~~~~~~~~~~~~~~~
>  
>  Required properties :
> - - compatible : "maxim,max17040" or "maxim,max77836-battery"
> + - compatible : "maxim,max17040", "maxim,max17041", "maxim,max17043",
> + 		"maxim,max17044", "maxim,max17048", "maxim,max17049",
> +		"maxim,max17058", "maxim,max17059" or "maxim,max77836-battery"
>   - reg: i2c slave address
>  
>  Optional properties :
> @@ -11,6 +13,10 @@ Optional properties :
>  				generated. Can be configured from 1 up to 32
>  				(%). If skipped the power up default value of
>  				4 (%) will be used.
> +- maxim,double-soc : 		Certain devices return double the capacity.
> +				Specify this boolean property to divide the
> +				reported value in 2 and thus normalize it.
> +				SOC == State of Charge == Capacity.

This can't be implied by the compatible string?

>  - interrupts : 			Interrupt line see Documentation/devicetree/
>  				bindings/interrupt-controller/interrupts.txt
>  - wakeup-source :		This device has wakeup capabilities. Use this
> @@ -31,3 +37,10 @@ Example:
>  		interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
>  		wakeup-source;
>  	};
> +
> +	battery-fuel-gauge@36 {
> +		compatible = "maxim,max17048";
> +		reg = <0x36>;
> +		maxim,alert-low-soc-level = <10>;
> +		maxim,double-soc;
> +	};
> -- 
> 2.27.0
>