linux-kernel - Re: [PATCH v4 6/7] regulator: axp20x: make use of devm_regulator_set

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Message-ID: <53A13BF6.5010305@free-electrons.com>
Date:	Wed, 18 Jun 2014 09:12:54 +0200
From:	Boris BREZILLON <boris.brezillon@...e-electrons.com>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
CC:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Carlo Caione <carlo@...one.org>,
	Shuge <shuge@...winnertech.com>, kevin@...winnertech.com,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	dev@...ux-sunxi.org
Subject: Re: [PATCH v4 6/7] regulator: axp20x: make use of devm_regulator_set_register


On 17/06/2014 22:46, Maxime Ripard wrote:
> On Tue, Jun 17, 2014 at 09:38:42AM +0200, Boris BREZILLON wrote:
>> Make use of the devm_regulator_set_register instead of registering each
>> regulator provided by the PMIC.
>>
>> This also solves a self dependency issue where one regulator of the PMIC
>> is used as a supply for anoher regulator provided by the same PMIC.
>>
>> Signed-off-by: Boris BREZILLON <boris.brezillon@...e-electrons.com>
>> ---
>>  drivers/regulator/axp20x-regulator.c | 59 ++++++++++++++----------------------
>>  1 file changed, 23 insertions(+), 36 deletions(-)
>>
>> diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
>> index d42bf6d..e8f0df7 100644
>> --- a/drivers/regulator/axp20x-regulator.c
>> +++ b/drivers/regulator/axp20x-regulator.c
>> @@ -301,66 +301,53 @@ static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 work
>>  
>>  static int axp20x_regulator_probe(struct platform_device *pdev)
>>  {
>> -	struct regulator_dev *rdev;
>> +	struct regulator_set *rset;
>>  	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
>> -	struct regulator_config config = { };
>> -	struct regulator_init_data *init_data;
>> +	struct regulator_set_config config;
>>  	struct of_regulator_match *matches;
>> -	int nmatches;
>> -	const struct regulator_desc *regulators;
>> -	int nregulators;
>>  	int ret, i;
>>  	u32 workmode;
>>  
>> +	memset(&config, 0, sizeof(config));
>> +	config.dev = &pdev->dev;
>> +	config.regmap = axp20x->regmap;
>>  	if (axp20x->variant == AXP221_ID) {
>>  		matches = axp22x_matches;
>> -		nmatches = ARRAY_SIZE(axp22x_matches);
>> -		regulators = axp22x_regulators;
>> -		nregulators = AXP22X_REG_ID_MAX;
>> +		config.descs = axp22x_regulators;
>> +		config.nregulators = AXP22X_REG_ID_MAX;
>>  	} else {
>>  		matches = axp20x_matches;
>> -		nmatches = ARRAY_SIZE(axp20x_matches);
>> -		regulators = axp20x_regulators;
>> -		nregulators = AXP20X_REG_ID_MAX;
>> +		config.descs = axp20x_regulators;
>> +		config.nregulators = AXP20X_REG_ID_MAX;
>>  	}
>> +	config.matches = matches;
>>  
>>  	/*
>>  	 * Reset matches table (this table might have been modified by a
>>  	 * previous AXP2xx device probe).
>>  	 */
>> -	for (i = 0; i < nmatches; i++) {
>> +	for (i = 0; i < config.nregulators; i++) {
>>  		matches[i].init_data = NULL;
>>  		matches[i].of_node = NULL;
>>  	}
>>  
>> -	ret = axp20x_regulator_parse_dt(pdev, matches, nmatches);
>> +	ret = axp20x_regulator_parse_dt(pdev, matches,
>> +					config.nregulators);
>>  	if (ret)
>>  		return ret;
>>  
>> -	for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
>> -		init_data = matches[i].init_data;
>> +	rset = devm_regulator_set_register(&pdev->dev, &config);
>> +	if (IS_ERR(rset))
>> +		return PTR_ERR(rset);
>>  
>> -		config.dev = &pdev->dev;
>> -		config.init_data = init_data;
>> -		config.regmap = axp20x->regmap;
>> -		config.of_node = matches[i].of_node;
>> -
>> -		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
>> -					       &config);
>> -		if (IS_ERR(rdev)) {
>> -			dev_err(&pdev->dev, "Failed to register %s\n",
>> -				regulators[i].name);
>> -
>> -			return PTR_ERR(rdev);
>> -		}
>> -
>> -		ret = of_property_read_u32(matches[i].of_node, "x-powers,dcdc-workmode",
>> +	for (i = 0; i < rset->nregulators; i++) {
>> +		ret = of_property_read_u32(config.matches[i].of_node,
>> +					   "x-powers,dcdc-workmode",
>>  					   &workmode);
>> -		if (!ret) {
>> -			if (axp20x_set_dcdc_workmode(rdev, i, workmode))
>> -				dev_err(&pdev->dev, "Failed to set workmode on %s\n",
>> -					regulators[i].name);
>> -		}
>> +		if (!ret &&
>> +		    axp20x_set_dcdc_workmode(rset->regulators[i], i, workmode))
>> +			dev_err(&pdev->dev, "Failed to set workmode on %s\n",
>> +				config.descs[i].name);
>>  	}
>>  
>>  	return 0;
>> -- 
>> 1.8.3.2
>>
> It looks like you're modifying code you just introduced. You should
> probably move this patch earlier on, so that you don't have to patch
> your patch.

Okay, I'll switch patch 5 and 6.

> Maxime
>

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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