Hi,

On Wed, Sep 26, 2018 at 10:59:13AM +0800, Baolin Wang wrote:
> This patch adds the binding documentation for Spreadtrum SC27XX series PMICs
> fuel gauge unit device, which is used to calculate the battery capacity.
> 
> Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
> ---

Looks good to me.

-- Sebastian

> Changes from v1:
>  - Renamed GPIO property.
>  - Use standand battery properties instead of 'sprd,inner-resist' and
>    'sprd,ocv-cap-table'.
>  - Remove battery node's description.
> ---
>  .../devicetree/bindings/power/supply/sc27xx-fg.txt |   52 ++++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt b/Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt
> new file mode 100644
> index 0000000..b161468
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/sc27xx-fg.txt
> @@ -0,0 +1,52 @@
> +Spreadtrum SC27XX PMICs Fuel Gauge Unit Power Supply Bindings
> +
> +Required properties:
> +- compatible: Should be one of the following:
> +  "sprd,sc2720-fgu",
> +  "sprd,sc2721-fgu",
> +  "sprd,sc2723-fgu",
> +  "sprd,sc2730-fgu",
> +  "sprd,sc2731-fgu".
> +- reg: The address offset of fuel gauge unit.
> +- battery-detect-gpios: GPIO for battery detection.
> +- io-channels: Specify the IIO ADC channel to get temperature.
> +- io-channel-names: Should be "bat-temp".
> +- monitored-battery: Phandle of battery characteristics devicetree node.
> +  See Documentation/devicetree/bindings/power/supply/battery.txt
> +
> +Example:
> +
> +	bat: battery {
> +		compatible = "simple-battery";
> +		charge-full-design-microamp-hours = <1900000>;
> +		constant-charge-voltage-max-microvolt = <4350000>;
> +		ocv-capacity-table-temperatures = <20>;
> +		ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>,
> +					<4022000 85>, <3983000 80>, <3949000 75>,
> +					<3917000 70>, <3889000 65>, <3864000 60>,
> +					<3835000 55>, <3805000 50>, <3787000 45>,
> +					<3777000 40>, <3773000 35>, <3770000 30>,
> +					<3765000 25>, <3752000 20>, <3724000 15>,
> +					<3680000 10>, <3605000 5>, <3400000 0>;
> +		......
> +	};
> +
> +	sc2731_pmic: pmic@0 {
> +		compatible = "sprd,sc2731";
> +		reg = <0>;
> +		spi-max-frequency = <26000000>;
> +		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		fgu@a00 {
> +			compatible = "sprd,sc2731-fgu";
> +			reg = <0xa00>;
> +			battery-detect-gpios = <&pmic_eic 9 GPIO_ACTIVE_HIGH>;
> +			io-channels = <&pmic_adc 5>;
> +			io-channel-names = "bat-temp";
> +			monitored-battery = <&bat>;
> +		};
> +	};
> -- 
> 1.7.9.5
>