linux-kernel - Re: [PATCH v2] regulator: max77686: Implement .set_ramp

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Date:	Wed, 20 Jun 2012 06:56:25 +0000 (GMT)
From:	MyungJoo Ham <myungjoo.ham@...sung.com>
To:	Yadwinder Singh Brar <yadi.brar01@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>,
	이종화 <jonghwa3.lee@...sung.com>,
	박경민 <kyungmin.park@...sung.com>,
	변치웅 <woong.byun@...sung.com>,
	Axel Lin <axel.lin@...il.com>,
	Yadwinder Singh Brar <yadi.brar@...sung.com>
Subject: Re: [PATCH v2] regulator: max77686: Implement .set_ramp_delay()
 callback.

> This patch implements the .set_ramp_delay callback to set the ramp_delay on
> hardware for BUCK2/3/4 if ramp_delay is set in regulator constraints.
> 
> This patch also do some cleaning work for unrequired members of
> struct max77686_data.
> 
> Signed-off-by: Yadwinder Singh Brar <yadi.brar@...sung.com>

I guess code-clean part may be seperated. Anyway, except that, it looks good.


Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>

> ---
>  drivers/regulator/max77686.c |   37 +++++++++++++++++++++++++++++--------
>  1 files changed, 29 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
> index a29eee3..5c2a32f 100644
> --- a/drivers/regulator/max77686.c
> +++ b/drivers/regulator/max77686.c
> @@ -65,11 +65,34 @@ enum max77686_ramp_rate {
>  };
>  
>  struct max77686_data {
> -	struct device *dev;
> -	struct max77686_dev *iodev;
>  	struct regulator_dev **rdev;
>  };
>  
> +static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
> +{
> +	unsigned int ramp_value = RAMP_RATE_NO_CTRL;
> +
> +	switch (ramp_delay) {
> +	case 1 ... 13750:
> +		ramp_value = RAMP_RATE_13P75MV;
> +		break;
> +	case 13751 ... 27500:
> +		ramp_value = RAMP_RATE_27P5MV;
> +		break;
> +	case 27501 ... 55000:
> +		ramp_value = RAMP_RATE_55MV;
> +		break;
> +	case 55001 ... 100000:
> +		break;
> +	default:
> +		pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
> +			rdev->desc->name, ramp_delay);
> +	}
> +
> +	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
> +				  MAX77686_RAMP_RATE_MASK, ramp_value << 6);
> +}
> +
>  static struct regulator_ops max77686_ops = {
>  	.list_voltage		= regulator_list_voltage_linear,
>  	.map_voltage		= regulator_map_voltage_linear,
> @@ -90,6 +113,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
>  	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
>  	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
>  	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
> +	.set_ramp_delay		= max77686_set_ramp_delay,
>  };
>  
>  #define regulator_desc_ldo(num)		{				\
> @@ -238,20 +262,17 @@ static __devinit int max77686_pmic_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	rdev = max77686->rdev;
> -	max77686->dev = &pdev->dev;
> -	max77686->iodev = iodev;
> +	config.dev = &pdev->dev;
> +	config.regmap = iodev->regmap;
>  	platform_set_drvdata(pdev, max77686);
>  
>  	for (i = 0; i < MAX77686_REGULATORS; i++) {
> -		config.dev = max77686->dev;
> -		config.regmap = iodev->regmap;
> -		config.driver_data = max77686;
>  		config.init_data = pdata->regulators[i].initdata;
>  
>  		rdev[i] = regulator_register(&regulators[i], &config);
>  		if (IS_ERR(rdev[i])) {
>  			ret = PTR_ERR(rdev[i]);
> -			dev_err(max77686->dev,
> +			dev_err(&pdev->dev,
>  				"regulator init failed for %d\n", i);
>  				rdev[i] = NULL;
>  				goto err;
> -- 
> 1.7.0.4
> 
> 
> 
> 
>        
>   
>          
>