linux-kernel - Re: [PATCH v2 5/6] regulator: tps65086: Add regulator driver for the TPS65086 PMIC

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Date:	Tue, 3 Nov 2015 09:57:46 -0600
From:	"Andrew F. Davis" <afd@...com>
To:	Mark Brown <broonie@...nel.org>
CC:	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>,
	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	<devicetree@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/6] regulator: tps65086: Add regulator driver for the
 TPS65086 PMIC

On 10/31/2015 09:37 PM, Mark Brown wrote:
> On Fri, Oct 30, 2015 at 05:41:43PM -0500, Andrew F. Davis wrote:
>
>> +struct tps65086_regulator {
>> +	struct regulator_desc desc;
>> +	unsigned int decay_reg;
>> +	unsigned int decay_mask;
>
> The decay_reg and decay_mask fields appear to be entirely write only,
> why are they present?
>

Not sure what you mean, they are written to differently for each regulator,
and read when setting the decay mode in _probe.

>> +	ret = of_regulator_match(&pdev->dev, pdev->dev.of_node,
>> +				 tps65086_matches,
>> +				 ARRAY_SIZE(tps65086_matches));
>> +	if (ret < 0) {
>> +		dev_err(tps->dev, "Error parsing regulator init data\n");
>> +		return ret;
>> +	}
>
> Please match regulators using the fields in the regulator_desc rather
> than open coding.
>

I need to match to get the driver specific information for each regulator,
if I let regulator_register do it I never get a chance to process the match,
unless there is a callback or something I'm missing.
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