linux-kernel - Re: [PATCH v2 2/4] mfd: max77620: add documentation for backup battery charging

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Date:   Wed, 30 Jan 2019 13:51:54 -0600
From:   Rob Herring <robh@...nel.org>
To:     Mark Zhang <markz@...dia.com>
Cc:     lee.jones@...aro.org, blaws05@...il.com, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH v2 2/4] mfd: max77620: add documentation for backup
 battery charging

On Tue, Jan 29, 2019 at 04:55:29PM +0800, Mark Zhang wrote:
> Adding documentation for 3 new backup battery charging dts
> properties:
> - maxim,backup-battery-charging-current
> - maxim,backup-battery-charging-voltage
> - maxim,backup-battery-output-resister
> 
> Signed-off-by: Mark Zhang <markz@...dia.com>
> ---
>  .../devicetree/bindings/mfd/max77620.txt      | 20 +++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/max77620.txt b/Documentation/devicetree/bindings/mfd/max77620.txt
> index 9c16d51cc15b..484b17e4fba5 100644
> --- a/Documentation/devicetree/bindings/mfd/max77620.txt
> +++ b/Documentation/devicetree/bindings/mfd/max77620.txt
> @@ -122,6 +122,26 @@ For DT binding details of different sub modules like GPIO, pincontrol,
>  regulator, power, please refer respective device-tree binding document
>  under their respective sub-system directories.
>  
> +Backup Battery:
> +==============
> +This sub-node configure charging backup battery of the device. Device has
> +support of charging the backup battery. The subnode name is "backup-battery".
> +The property for backup-battery child nodes as:
> +Presence of this child node will enable the backup battery charging.
> +
> +Optional properties:
> +	-maxim,backup-battery-charging-current: Charging current setting.
> +			The device supports 50/100/200/400/600/800uA.
> +			If this property is unavailable then it will
> +			charge with 50uA.
> +	-maxim,backup-battery-charging-voltage: Charging Voltage Limit Setting.
> +			Device supports 2500000/3000000/3300000/350000uV.
> +			Default will be set to 2500mV. The voltage will be roundoff
> +			to nearest lower side if other than above is configured.
> +	-maxim,backup-battery-output-resister: Output resistor on Ohm.
> +			Device supports 100/1000/3000/6000 Ohms.
> +			Default will be set to 1000 Ohm.

These need property unit suffixes as defined in property-units.txt. The 
names are kind of long, so perhaps shorten them a bit.

> +
>  Example:
>  --------
>  #include <dt-bindings/mfd/max77620.h>
> -- 
> 2.19.2
>