linux-kernel - Re: [PATCH] regulator: tps6586x: add SMx slew rate setting

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Date:	Sun, 28 Aug 2011 17:49:41 +0100
From:	Liam Girdwood <lrg@...nel.org>
To:	dahuang@...dia.com
Cc:	broonie@...nsource.wolfsonmicro.com, lrg@...com,
	mike@...pulab.co.il, sameo@...ux.intel.com, xxie@...dia.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: tps6586x: add SMx slew rate setting

On Tue, 2011-08-09 at 18:47 +0800, dahuang@...dia.com wrote:
> From: Xin Xie <xxie@...dia.com>
> 
> Add output vlotage slew rate setting for SM0/SM1
> 
> Signed-off-by: Xin Xie <xxie@...dia.com>
> Signed-off-by: Danny Huang <dahuang@...dia.com>
> ---
>  drivers/regulator/tps6586x-regulator.c |   32 +++++++++++++++++++++++++++++++-
>  include/linux/mfd/tps6586x.h           |   16 ++++++++++++++++
>  2 files changed, 47 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
> index bb04a75..dbcf09d 100644
> --- a/drivers/regulator/tps6586x-regulator.c
> +++ b/drivers/regulator/tps6586x-regulator.c
> @@ -332,6 +332,36 @@ static inline int tps6586x_regulator_preinit(struct device *parent,
>  				 1 << ri->enable_bit[1]);
>  }
>  
> +static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
> +{
> +	struct device *parent = pdev->dev.parent;
> +	struct regulator_init_data *p = pdev->dev.platform_data;
> +	struct tps6586x_settings *setting = p->driver_data;
> +	uint8_t reg;
> +
> +	if (setting == NULL)
> +		return 0;
> +
> +	if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
> +		return 0;
> +
> +	/* only SM0 and SM1 can have the slew rate settings */
> +	switch (pdev->id) {
> +	case TPS6586X_ID_SM_0:
> +		reg = TPS6586X_SM0SL;
> +		break;
> +	case TPS6586X_ID_SM_1:
> +		reg = TPS6586X_SM1SL;
> +		break;
> +	default:
> +		dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
> +		return -EINVAL;
> +	}
> +
> +	return tps6586x_write(parent, reg,
> +			setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
> +}
> +
>  static inline struct tps6586x_regulator *find_regulator_info(int id)
>  {
>  	struct tps6586x_regulator *ri;
> @@ -374,7 +404,7 @@ static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, rdev);
>  
> -	return 0;
> +	return tps6586x_regulator_set_slew_rate(pdev);
>  }
>  
>  static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
> diff --git a/include/linux/mfd/tps6586x.h b/include/linux/mfd/tps6586x.h
> index b6bab1b..b19176e 100644
> --- a/include/linux/mfd/tps6586x.h
> +++ b/include/linux/mfd/tps6586x.h
> @@ -1,6 +1,18 @@
>  #ifndef __LINUX_MFD_TPS6586X_H
>  #define __LINUX_MFD_TPS6586X_H
>  
> +#define TPS6586X_SLEW_RATE_INSTANTLY	0x00
> +#define TPS6586X_SLEW_RATE_110UV	0x01
> +#define TPS6586X_SLEW_RATE_220UV	0x02
> +#define TPS6586X_SLEW_RATE_440UV	0x03
> +#define TPS6586X_SLEW_RATE_880UV	0x04
> +#define TPS6586X_SLEW_RATE_1760UV	0x05
> +#define TPS6586X_SLEW_RATE_3520UV	0x06
> +#define TPS6586X_SLEW_RATE_7040UV	0x07
> +
> +#define TPS6586X_SLEW_RATE_SET		0x08
> +#define TPS6586X_SLEW_RATE_MASK         0x07
> +
>  enum {
>  	TPS6586X_ID_SM_0,
>  	TPS6586X_ID_SM_1,
> @@ -48,6 +60,10 @@ enum {
>  	TPS6586X_INT_RTC_ALM2,
>  };
>  
> +struct tps6586x_settings {
> +	int slew_rate;
> +};
> +
>  struct tps6586x_subdev_info {
>  	int		id;
>  	const char	*name;

Applied.

Thanks

Liam


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