linux-kernel - Re: [PATCH] regulator: max8997: Fix setting inappropriate value for ramp

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Date:	Fri, 08 Jul 2011 19:28:11 +0100
From:	Liam Girdwood <lrg@...mlogic.co.uk>
To:	Donggeun Kim <dg77.kim@...sung.com>
Cc:	linux-kernel@...r.kernel.org, lrg@...com,
	broonie@...nsource.wolfsonmicro.com, myungjoo.ham@...sung.com,
	kyungmin.park@...sung.com
Subject: Re: [PATCH] regulator: max8997: Fix setting inappropriate value
 for ramp_delay variable

On Thu, 2011-07-07 at 16:51 +0900, Donggeun Kim wrote:
> The ramp_delay variable can be set lower than the desired value.
> This patch fixes it.
> 
> Signed-off-by: Donggeun Kim <dg77.kim@...sung.com>
> Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>
> Signed-off-by: KyungMin Park <kyungmin.park@...sung.com>
> ---
>  drivers/regulator/max8997.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c
> index 10d5a1d..682bc79 100644
> --- a/drivers/regulator/max8997.c
> +++ b/drivers/regulator/max8997.c
> @@ -543,7 +543,8 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
>  			rid == MAX8997_BUCK4 || rid == MAX8997_BUCK5) {
>  		/* If the voltage is increasing */
>  		if (org < i)
> -			udelay(desc->step * (i - org) / max8997->ramp_delay);
> +			udelay(DIV_ROUND_UP(desc->step * (i - org),
> +						max8997->ramp_delay));
>  	}
>  
>  	return ret;

Applied.

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