linux-kernel - Re: [PATCH v3 3/4] mfd: Add DT binding for Maxim MAX77802 IC

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Date:	Tue, 11 Aug 2015 17:25:21 +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 v3 3/4] mfd: Add DT binding for Maxim MAX77802 IC

Hello Lee,

On 08/11/2015 01:47 PM, Lee Jones wrote:
> On Thu, 30 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>
>> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
>>
>> ---
>>
>> Changes in v3:
>> - Add Krzysztof Kozlowski Reviewed-by tag to patch #3.
>> - Capitalise all acronyms. Suggested by Lee Jones.
>> - Use relative path to refer other bindings. Suggested by Lee Jones.
>> - Use IRQ_TYPE_NONE instead of 0 in example. Suggested by Lee Jones.
>>
>> 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..911ec5fcaefd
>> --- /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 IC (PMIC) that contains 10 high
>> +efficiency Buck regulators, 32 Low-DropOut (LDO) regulators used to power
>> +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 ../clk/maxim,max77802.txt file and binding for the regulators
>> +is defined in the ../regulator/max77802.txt file.
> 
>   "Bindings for the built-in 32k clock generator block and
>    regulators are defined in ../clk/maxim,max77802.txt and
>    ../regulator/max77802.txt respectively."
> 
>> +Required properties:
>> +- compatible : Must be "maxim,max77802";
> 
> ';' ?
>

err... I've no idea how that ended there. It seems I didn't completely
context switch from coding :-)
 
>> +- reg : Specifies the I2C slave address of PMIC block.
>> +- interrupts : This I2C device has an IRQ line connected to the main SoC.
>> +- interrupt-parent : The parent interrupt controller.
> 
> I always find this easier on the eye when you:
>
> Required properties:
> - compatible		: Must be "maxim,max77802"
> - reg			: Specifies the I2C slave address of PMIC block.
> - interrupts		: This I2C device has an IRQ line connected to the main SoC.
> - interrupt-parent	: The parent interrupt controller.
>

Ok, I'll wait for Mark's feedback and repost with your suggestions. Thanks!

>> +Example:
>> +
>> +	max77802: pmic@09 {
>> +		compatible = "maxim,max77802";
>> +		interrupt-parent = <&intc>;
>> +		interrupts = <26 IRQ_TYPE_NONE>;
>> +		reg = <0x09>;
>> +	};
> 

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