linux-kernel - Re: [PATCH 1/1] regulator: return set

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Date:	Mon, 17 May 2010 15:35:29 +0100
From:	Liam Girdwood <lrg@...mlogic.co.uk>
To:	Sundar Iyer <sundar.iyer@...ricsson.com>
Cc:	linux-kernel@...r.kernel.org, STEricsson_nomadik_linux@...t.st.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: Re: [PATCH 1/1] regulator: return set_mode is same mode is
 requested

On Mon, 2010-05-17 at 19:39 +0530, Sundar Iyer wrote:
> From: Sundar R Iyer <sundar.iyer@...ricsson.com>
> 
> Cc: Liam Girdwood <lrg@...mlogic.co.uk>
> Cc: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> Acked-by: Linus Walleij <linus.walleij@...ricsson.com>
> Signed-off-by: Sundar R Iyer <sundar.iyer@...ricsson.com>
> ---
>  drivers/regulator/core.c |    8 ++++++++
>  1 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
> index 98e5d14..5054add 100644
> --- a/drivers/regulator/core.c
> +++ b/drivers/regulator/core.c
> @@ -1599,6 +1599,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
>  {
>  	struct regulator_dev *rdev = regulator->rdev;
>  	int ret;
> +	int regulator_curr_mode;

Shouldn't this variable be in regulator_set_mode() ?

>  
>  	mutex_lock(&rdev->mutex);
>  
> @@ -1754,6 +1755,13 @@ int regulator_set_mode(struct regulator *regulator, unsigned int mode)
>  		goto out;
>  	}
>  
> +	/* return if the same mode is requested */
> +	regulator_curr_mode = rdev->desc->ops->get_mode(rdev);
> +	if (regulator_curr_mode == mode) {
> +		ret = 0;
> +		goto out;
> +	}
> +
>  	/* constraints check */
>  	ret = regulator_check_mode(rdev, mode);
>  	if (ret < 0)

Thanks

Liam
-- 
Freelance Developer, SlimLogic Ltd
ASoC and Voltage Regulator Maintainer.
http://www.slimlogic.co.uk

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