linux-kernel - RE: [PATCH v2] regulator: tps65217: Fix voltage boundary checking in tps65217_pmic_map

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Date:	Tue, 3 Jul 2012 07:45:52 +0000
From:	"AnilKumar, Chimata" <anilkumar@...com>
To:	Axel Lin <axel.lin@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	"Girdwood, Liam" <lrg@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Nori, Sekhar" <nsekhar@...com>
Subject: RE: [PATCH v2] regulator: tps65217: Fix voltage boundary checking
 in tps65217_pmic_map_voltage

Hi Axel,

Thanks for the patch

Acked-by: AnilKumar Ch <anilkumar@...com>

On Tue, Jul 03, 2012 at 12:49:33, Axel Lin wrote:
> It is ok to request voltage with min_uV < tps->info[rid]->min_uV and
> max_uV > tps->info[rid]->max_uV.
> 
> The equation we used in uv_to_vsel() does not allow
> min_uV < tps->info[rid]->min_uV, otherwise it returns negative selector.
> So we need to set min_uV = tps->info[rid]->min_uV if
> min_uV < tps->info[rid]->min_uV.
> 
> Signed-off-by: Axel Lin <axel.lin@...il.com>
> ---
>  drivers/regulator/tps65217-regulator.c |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/regulator/tps65217-regulator.c b/drivers/regulator/tps65217-regulator.c
> index 0a3df5b..f7d0495 100644
> --- a/drivers/regulator/tps65217-regulator.c
> +++ b/drivers/regulator/tps65217-regulator.c
> @@ -206,10 +206,10 @@ static int tps65217_pmic_map_voltage(struct regulator_dev *dev,
>  	if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
>  		return -EINVAL;
>  
> -	if (min_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
> -		return -EINVAL;
> +	if (min_uV < tps->info[rid]->min_uV)
> +		min_uV = tps->info[rid]->min_uV;
>  
> -	if (max_uV < tps->info[rid]->min_uV || max_uV > tps->info[rid]->max_uV)
> +	if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
>  		return -EINVAL;
>  
>  	ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
> -- 
> 1.7.9.5
> 
> 
> 
>