linux-kernel - Re: [PATCH] regulator: max8997/8966: fix charger cv voltage set bug

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Date:   Wed, 10 May 2017 08:33:31 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     myungjoo.ham@...sung.com, Dan Carpenter <dan.carpenter@...cle.com>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "krzk@...nel.org" <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: max8997/8966: fix charger cv voltage set bug

Hi,

On 2017년 05월 08일 14:45, MyungJoo Ham wrote:
> 
> When min charger-CV is <= 4.0V and max charger-CV is >= 4.0V,
> we can use 4.00V as CV (register value = 0x1).`
> 
> The original code had a typo that wrote ">=" (max_uV >= 4000000),
> which should've been "<", which is not necessary anyway
> as mentioned by Dan Carpenter.
> 
> Reported-By: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>
> ---
>  drivers/regulator/max8997-regulator.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/regulator/max8997-regulator.c b/drivers/regulator/max8997-regulator.c
> index efabc0e..559b9ac 100644
> --- a/drivers/regulator/max8997-regulator.c
> +++ b/drivers/regulator/max8997-regulator.c
> @@ -428,12 +428,9 @@ static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
>  	if (max_uV < 4000000 || min_uV > 4350000)
>  		return -EINVAL;
>  
> -	if (min_uV <= 4000000) {
> -		if (max_uV >= 4000000)
> -			return -EINVAL;
> -		else
> -			val = 0x1;
> -	} else if (min_uV <= 4200000 && max_uV >= 4200000)
> +	if (min_uV <= 4000000)
> +		val = 0x1;
> +	else if (min_uV <= 4200000 && max_uV >= 4200000)
>  		val = 0x0;
>  	else {
>  		lb = (min_uV - 4000001) / 20000 + 2;
> 

Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics