linux-kernel - Re: [PATCH 2/4] MFD: TPS65218: Add driver for the TPS65218 PMIC

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Date:	Tue, 3 Dec 2013 15:36:35 +0530
From:	Keerthy <a0393675@...com>
To:	Lee Jones <lee.jones@...aro.org>
CC:	Keerthy <j-keerthy@...com>, <rob.herring@...xeda.com>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<swarren@...dotorg.org>, <ijc+devicetree@...lion.org.uk>,
	<rob@...dley.net>, <sameo@...ux.intel.com>,
	<grant.likely@...aro.org>, <lgirdwood@...il.com>,
	<broonie@...nel.org>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: Re: [PATCH 2/4] MFD: TPS65218: Add driver for the TPS65218 PMIC

On Tuesday 03 December 2013 02:54 PM, Lee Jones wrote:
>> The TPS65218 chip is a power management IC for Portable Navigation Systems
>> and Tablet Computing devices. It contains the following components:
>>
>>   - Regulators.
>>   - Over Temperature warning and Shut down.
>>
>> This patch adds support for tps65218 mfd device. At this time only
>> the regulator functionality is made available.
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>   drivers/mfd/Kconfig          |   14 ++
>>   drivers/mfd/Makefile         |    1 +
>>   drivers/mfd/tps65218.c       |  281 +++++++++++++++++++++++++++++++++++++++++
>>   include/linux/mfd/tps65218.h |  288 ++++++++++++++++++++++++++++++++++++++++++
> <snip>
>
>> +config MFD_TPS65218
>> +	tristate "TI TPS65218 Power Management chips"
>> +	depends on I2C
>> +	select MFD_CORE
>> +	select REGMAP_I2C
>> +	help
>> +	  If you say yes here you get support for the TPS65218 series of
>> +	  Power Management chips.
>> +	  These include voltage regulators, gpio and other features
>> +	  that are often used in portable devices.
> Perhaps you should add a note that only the regulator component is
> currently supported.
Ok. I will add it.

> <snip>
>
>> new file mode 100644
>> index 0000000..8c61640
>> --- /dev/null
>> +++ b/drivers/mfd/tps65218.c
>> @@ -0,0 +1,281 @@
>> +/*
>> + * TPS65218 chip family multi-function driver
> Instead of calling it an MFD driver (is there such a thing?) I think
> you should mention its true purpose, as per the datasheet.

Ok.

>
> <snip>
>
>> +static const struct of_device_id of_tps65218_match_table[] = {
>> +	{ .compatible = "ti,tps65218", },
>> +	{ /* end */ }
> I think the end comment is superfluous.
>
> However, if you _really_ want to put something in there, I dislike
> "/* Sentinel */" the least.

I will remove it.
>
>> +static int tps65218_probe(struct i2c_client *client,
>> +				const struct i2c_device_id *ids)
>> +{
> <snip>
>
>> +	ret = of_platform_populate(client->dev.of_node, NULL, NULL,
>> +				   &client->dev);
> What are you trying to do here?
>
> Register each regulator as a platform device?

Yeah. The probe will be called for every regulator separately.

> <snip>
>
>> +static const struct i2c_device_id tps65218_id_table[] = {
>> +	{"tps65218", TPS65218},
>> +};
> This has a different structure to of_tps65218_match_table, please
> ensure they're the same. I prefer spaces after '{' and before '}'.

Ok. I will add a space after '{' and before '}'. Sorry I did not
follow tps65218_id_table being different than of_tps65218_match_table.

One is of the type of_device_id and the other i2c_device_id.
>
> <snip>
>

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