linux-kernel - Re: [PATCH v3] io: accel: kxcjk1013: restore the range after resume.

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Date:   Wed, 6 Mar 2019 09:43:24 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Chen, Hu" <hu1.chen@...el.com>
Cc:     bo.he@...el.com, Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Stephan Gerhold <stephan@...hold.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] io: accel: kxcjk1013: restore the range after resume.

Hi,

On 06-03-19 03:32, Chen, Hu wrote:
> From: "he, bo" <bo.he@...el.com>
> 
> On some laptops, kxcjk1013 is powered off when system enters S3. We need
> restore the range regiter during resume. Otherwise, the sensor doesn't
> work properly after S3.
> 
> Signed-off-by: he, bo <bo.he@...el.com>
> Signed-off-by: Chen, Hu <hu1.chen@...el.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>   v3: Avoid unnecessary mutex_unlock (Hans).
>   v2: Handle return value independently (Jonathan).
> 
>   drivers/iio/accel/kxcjk-1013.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
> index 7096e577b23f..50f3ff386bea 100644
> --- a/drivers/iio/accel/kxcjk-1013.c
> +++ b/drivers/iio/accel/kxcjk-1013.c
> @@ -1437,6 +1437,8 @@ static int kxcjk1013_resume(struct device *dev)
>   
>   	mutex_lock(&data->mutex);
>   	ret = kxcjk1013_set_mode(data, OPERATION);
> +	if (ret == 0)
> +		ret = kxcjk1013_set_range(data, data->range);
>   	mutex_unlock(&data->mutex);
>   
>   	return ret;
>