linux-kernel - Re: [PATCH v2 3/4] mfd: Add DT binding for Maxim MAX77802 IC

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Date:	Thu, 23 Jul 2015 18:09:20 +0200
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 3/4] mfd: Add DT binding for Maxim MAX77802 IC

Hello Lee,

Thanks for your feedback.

On 07/23/2015 05:16 PM, Lee Jones wrote:
> On Fri, 17 Jul 2015, Javier Martinez Canillas wrote:
> 
>> The MAX77802 is a chip that contains regulators, 2 32kHz clocks,
>> a RTC and an I2C interface to program the individual components.
>>
>> The are already DT bindings for the regulators and clocks and
>> these reference to a bindings/mfd/max77802.txt file, that didn't
>> exist, for the details about the PMIC.
>>
>> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
>>
>> ---
>>
>> Changes in v2:
>> - Use the correct "maxim,max77802" compatible string.
>>   Suggested by Krzysztof Kozlowski
>> - Use a pmic generic node name for the max77802 node example.
>>   Suggested by Sergei Shtylyov.
>>
>>  Documentation/devicetree/bindings/mfd/max77802.txt | 26 ++++++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mfd/max77802.txt
>>
>> diff --git a/Documentation/devicetree/bindings/mfd/max77802.txt b/Documentation/devicetree/bindings/mfd/max77802.txt
>> new file mode 100644
>> index 000000000000..c60cdec50d36
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/max77802.txt
>> @@ -0,0 +1,26 @@
>> +Maxim MAX77802 multi-function device
>> +
>> +The Maxim MAX77802 is a power management chip (PMIC) that contains 10 high
>> +efficiency Buck regulators, 32 Low-dropout (LDO) regulators used to power
> 
> Would be good to capitalise the works in the acronyms, so
> "Low-DropOut" and "Power Management IC".
>

Ok.
 
>> +up application processors and peripherals, a 2-channel 32kHz clock outputs,
>> +a Real-Time-Clock (RTC) and a I2C interface to program the individual
>> +regulators, clocks outputs and the RTC.
>> +
>> +Binding for the built-in 32k clock generator block is defined separately
>> +in the bindings/clk/maxim,max77802.txt file and binding for the regulators
> 
> s/bindings/../
>

Ok.
 
>> +is defined in the bindings/regulator/max77802.txt file.
>> +
>> +Required properties:
>> +- compatible : Must be "maxim,max77802";
>> +- reg : Specifies the i2c slave address of PMIC block.
> 
> s/i2c/I2C/
> 
>> +- interrupts : This i2c device has an IRQ line connected to the main SoC.
> 
> As above.
>

Ok. I'll change it.
 
>> +- interrupt-parent : The parent interrupt controller.
>> +
>> +Example:
>> +
>> +	max77802: pmic@09 {
>> +		compatible = "maxim,max77802";
>> +		interrupt-parent = <&intc>;
>> +		interrupts = <26 0>;
> 
> Is there a define in include/dt-bindings/interrupt-controller to
> replace 0?  IRQ_TYPE_NONE perhaps.
>

Yes, I'll change that as well.
 
>> +		reg = <0x09>;
>> +	};
> 

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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