linux-kernel - Re: [PATCH 2/3] dt: power: Add the bq2515x family dt bindings

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Date:   Sun, 20 Oct 2019 14:30:14 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Dan Murphy <dmurphy@...com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] dt: power: Add the bq2515x family dt bindings

Hi Dan,

On Mon, Sep 30, 2019 at 09:31:36AM -0500, Dan Murphy wrote:
> Add the bindings for the bq25150 and bq25155 500mA
>  charging IC from Texas Instruments.
> 
> Datasheet:
> http://www.ti.com/lit/ds/symlink/bq25150.pdf
> http://www.ti.com/lit/ds/symlink/bq25155.pdf
> 
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
>  .../bindings/power/supply/bq2515x.txt         | 48 +++++++++++++++++++

This should use the new YAML binding style.

>  1 file changed, 48 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/supply/bq2515x.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/bq2515x.txt b/Documentation/devicetree/bindings/power/supply/bq2515x.txt
> new file mode 100644
> index 000000000000..98203ab53d44
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/supply/bq2515x.txt
> @@ -0,0 +1,48 @@
> +Binding for TI bq25150 500-mA Linear charger
> +
> +The BQ25150 is a highly integrated battery charge management IC that integrates
> +the most common functions for wearable devices, namely a charger, an
> +output voltage rail, ADC for battery and system monitoring, and
> +push-button controller.
> +
> +Required Properties:
> +	- compatible: Should contain one of the following:
> +		"ti,bq25150"
> +		"ti,bq25155"
> +	- reg: int I2c address 0x6b
> +	- #address-cells: 1;
> +	- #size-cells: = 0;
> +
> +Optional Properties:
> +	- ti,battery-regulation-voltage: integer, maximum charging voltage in mV.
> +		Values range from 3600->4600mV
> +	- ti,charge-current: integer, maximum charging current in mA.
> +		Values range from 50->600mA

Those values should be in uV and uA. Also the values basically
describe the dumb battery, so please use this binding:

Documentation/devicetree/bindings/power/supply/battery.txt

> +	- reset-gpios: GPIO used for Master reset
> +	- low-power-gpios: GPIO used for low power mode of IC.
> +	- charge-enable-gpios: GPIO used to turn on and off charging.
> +	- pg-gpios: GPIO used for connecting the bq2515x device PG (Power Good)
> +		pin.  This pin should be used if possible as this is the
> +		recommended way to obtain the charger's input PG state.
> +		If this pin is not specified a software-based approach for PG
> +		detection is used.
> +
> +Example
> +bq25150@6b {

charger@6b

> +	compatible = "ti,bq25150";
> +	reg = <0x6b>;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +
> +	pg-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
> +	reset-gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
> +	low-power-gpios = <&gpio0 15 GPIO_ACTIVE_HIGH>;
> +	charge-enable-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
> +
> +	ti,charge-current = <300>;
> +	ti,battery-regulation-voltage = <4200>;
> +};
> +
> +Reference Datasheet:
> +http://www.ti.com/lit/ds/symlink/bq25150.pdf
> +http://www.ti.com/lit/ds/symlink/bq25155.pdf
> -- 
> 2.22.0.214.g8dca754b1e
> 

-- Sebastian

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