linux-kernel - Re: [PATCH v2] iio: hid-sensor-prox: Fix scale not correct issue

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Date:   Sun, 31 Jan 2021 15:16:12 +0800
From:   "Ye, Xiang" <xiang.ye@...el.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     jikos@...nel.org, srinivas.pandruvada@...ux.intel.com,
        linux-input@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: hid-sensor-prox: Fix scale not correct issue

On Sat, Jan 30, 2021 at 07:14:29PM +0000, Jonathan Cameron wrote:
> On Sat, 30 Jan 2021 18:25:30 +0800
> Ye Xiang <xiang.ye@...el.com> wrote:
> 
> > Currently, the proxy sensor scale is zero because it just return the
> > exponent directly. To fix this issue, this patch use
> > hid_sensor_format_scale to process the scale first then return the
> > output.
> > 
> > Fixes: 39a3a0138f61 ("iio: hid-sensors: Added Proximity Sensor Driver")
> > Signed-off-by: Ye Xiang <xiang.ye@...el.com>
> 
> Hi Ye Xiang,
> 
> There was a bit of fuzz on this so please take a look at
> my fixes-togreg branch and check it went in cleanly.
Have checked, it's correct.

Thanks
Ye Xiang
> 
> 
> > ---
> > v2:
> >   - Add Fixes tag
> > 
> > ---
> >  drivers/iio/light/hid-sensor-prox.c | 13 +++++++++++--
> >  1 file changed, 11 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
> > index 4ab285a418d5..4abcfe48f1d4 100644
> > --- a/drivers/iio/light/hid-sensor-prox.c
> > +++ b/drivers/iio/light/hid-sensor-prox.c
> > @@ -23,6 +23,9 @@ struct prox_state {
> >  	struct hid_sensor_common common_attributes;
> >  	struct hid_sensor_hub_attribute_info prox_attr;
> >  	u32 human_presence;
> > +	int scale_pre_decml;
> > +	int scale_post_decml;
> > +	int scale_precision;
> >  };
> >  
> >  static const u32 prox_sensitivity_addresses[] = {
> > @@ -98,8 +101,9 @@ static int prox_read_raw(struct iio_dev *indio_dev,
> >  		ret_type = IIO_VAL_INT;
> >  		break;
> >  	case IIO_CHAN_INFO_SCALE:
> > -		*val = prox_state->prox_attr.units;
> > -		ret_type = IIO_VAL_INT;
> > +		*val = prox_state->scale_pre_decml;
> > +		*val2 = prox_state->scale_post_decml;
> > +		ret_type = prox_state->scale_precision;
> >  		break;
> >  	case IIO_CHAN_INFO_OFFSET:
> >  		*val = hid_sensor_convert_exponent(
> > @@ -221,6 +225,11 @@ static int prox_parse_report(struct platform_device *pdev,
> >  	dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
> >  			st->prox_attr.report_id);
> >  
> > +	st->scale_precision = hid_sensor_format_scale(
> > +				hsdev->usage,
> > +				&st->prox_attr,
> > +				&st->scale_pre_decml, &st->scale_post_decml);
> > +
> >  	return ret;
> >  }
> >  
>