linux-kernel - Re: [PATCH 6/6] Documentation: Add device tree bindings document for max77843

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Date:	Fri, 23 Jan 2015 15:25:07 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Jaewon Kim <jaewon02.kim@...sung.com>
Cc:	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-pm@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Lee Jones <lee.jones@...aro.org>,
	Sebastian Reichel <sre@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Beomho Seo <beomho.seo@...sung.com>
Subject: Re: [PATCH 6/6] Documentation: Add device tree bindings document for
 max77843

Hi Jaewon,

On 01/23/2015 02:02 PM, Jaewon Kim wrote:
> Add document describing device tree bindings for max77843 MFD.
> Drivers: MFD core, regulator, extcon, charger and fuelgauge.
> 
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Pawel Moll <pawel.moll@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
> Cc: Kumar Gala <galak@...eaurora.org>
> Cc: Lee Jones <lee.jones@...aro.org>
> Cc: Chanwoo Choi <cw00.choi@...sung.com>
> Cc: Sebastian Reichel <sre@...nel.org>
> Cc: Mark Brown <broonie@...nel.org>
> Signed-off-by: Beomho Seo <beomho.seo@...sung.com>
> Signed-off-by: Jaewon Kim <jaewon02.kim@...sung.com>
> ---
>  Documentation/devicetree/bindings/mfd/max77843.txt |   87 ++++++++++++++++++++
>  1 file changed, 87 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/max77843.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/max77843.txt b/Documentation/devicetree/bindings/mfd/max77843.txt
> new file mode 100644
> index 0000000..6895604
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/max77843.txt
> @@ -0,0 +1,87 @@
> +Maxim MAX77843 multi-function device
> +
> +MAX77843 is a Multi-Function Device with the following submodules:
> +- PMIC	  : 2 SAFEOUT LDOs for USB device
> +- CHARGER : Li+ battery charger with Fuel Gauge
> +- MUIC	  : Micro USB Interface Circuit
> +- HAPTIC  : motor control driver for haptics

HAPTIC ?

> +- LED	  : 4 channel RGBW LED

LED ?

This patchset don't include andy haptic/led drivers.
I think it is un-necessary information.

When you implement the haptic/led driver, you will add the information
for haptic/led driver.

> +
> +It is interfaced to host controller using I2C.
> +
> +Required properties:
> +- compatible : Must be "maxim,max77843".
> +- reg : I2C slave address of PMIC block.
> +- interrupts : I2C line for main SoCs.
> +- interrupt-parent : The parent of interrupt controller.
> +
> +Optional properties:
> +- regulators : The regulators of max77843 have to be instantiated under subnode
> +	named "regulators" using the following format.
> +
> +	[*]refer : Documentation/devicetree/bindings/regulator/regulator.txt
> +
> +	regulators {
> +		SAFEOUT {
> +			regulator-name = "SAFEOUT";
> +		};
> +	}
> +
> +	List of valid regulator names:
> +	- SAFEOUT1, SAFEOUT2, CHARGER.
> +
> +- max77843-muic : This properties used by extcon consumers.
> +	Required properties:
> +		- compatible : Must be "maxim,max77842-muic".
> +
> +- max77843-charger : There battery charger of MAX77843 have to be instantiated
> +	under sub-node named "max77843-charger" using the following format.
> +	Required properties:
> +		- compatible : Must be "maxim,max77842-charger".
> +		- maxim,fast-charge-uamp : Fast charge current levels are
> +			100 mA to 3150 mA programmed by I2C per 100 mA.
> +		- maxim,top-off-uamp : Top off current threshold levels are
> +			125 mA to 650 mA programmed by I2C per 75 mA.
> +		- maxim,input-uamp-limit : Input current limit levels are
> +			100 mA to 3533 mA programmed by I2C per 33 mA.
> +- max77843-fuelgauge : There fuelgauge of MAX77843 have to be instantiated
> +	under sub-node named "max77843-fuelgauge" using the following format.
> +	Required properties:
> +		- compatible : Must be "maxim,max77842-fuelgauge".
> +
> +Example:
> +	max77843@66 {
> +		compatible = "samsung,max77843";
> +		reg = <0x66>;
> +		interrupt-parent = <&gpa1>;
> +		interrupts = <5 2>;
> +
> +		regulators {
> +			SAFEOUT1 {
> +				regulator-name = "SAFEOUT1";
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <4950000>;
> +			};
> +			SAFEOUT2 {
> +				regulator-name = "SAFEOUT2";
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <4950000>;
> +			};

As I knew, max77843 regulator driver supprot 'CHARGER' regulator.
I think you have to add the 'CHARGER' dt node for regulators.


> +		};
> +
> +		max77843-muic {
> +			compatible = "maxim,max77843-muic";
> +		};
> +
> +		max77843-charger {
> +			compatible = "maxim,max77843-charger";
> +			maxim,fast-charge-uamp = <450000>;
> +			maxim,top-off-uamp = <125000>;
> +			maxim,input-uamp-limit = <500000>;
> +		};
> +
> +		max77843-fuelgauge {
> +			compatible = "maxim,max77843-fuelgauge";
> +		};
> +
> +	};
> 

Thanks,
Chanwoo Choi
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