linux-kernel - Re: [PATCH] power: bq27xxx: fix polarity of current

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Message-ID: <20210116145704.7hycpifbjgjivqkq@earth.universe>
Date:   Sat, 16 Jan 2021 15:57:04 +0100
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     pali@...nel.org, dmurphy@...com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: bq27xxx: fix polarity of current_now

Hi,

On Fri, Dec 04, 2020 at 03:49:50PM +0100, Andreas Kemnade wrote:
> current_now has to be negative during discharging and positive during
> charging, the behavior seen is the other way round.
> 
> Tested on GTA04 with Openmoko battery
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---

Thanks, queued.

-- Sebastian

>  drivers/power/supply/bq27xxx_battery.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
> index 315e0909e6a4..3ecc18b01d49 100644
> --- a/drivers/power/supply/bq27xxx_battery.c
> +++ b/drivers/power/supply/bq27xxx_battery.c
> @@ -1789,7 +1789,7 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
>  
>  	if (di->opts & BQ27XXX_O_ZERO) {
>  		flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
> -		if (flags & BQ27000_FLAG_CHGS) {
> +		if (!(flags & BQ27000_FLAG_CHGS)) {
>  			dev_dbg(di->dev, "negative current!\n");
>  			curr = -curr;
>  		}
> @@ -1797,7 +1797,7 @@ static int bq27xxx_battery_current(struct bq27xxx_device_info *di,
>  		val->intval = curr * BQ27XXX_CURRENT_CONSTANT / BQ27XXX_RS;
>  	} else {
>  		/* Other gauges return signed value */
> -		val->intval = (int)((s16)curr) * 1000;
> +		val->intval = -(int)((s16)curr) * 1000;
>  	}
>  
>  	return 0;
> -- 
> 2.20.1
> 

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