linux-kernel - Re: [PATCH] iio: hid-sensor-als: Don't stop probing at non-supported attribute

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Message-ID: <20231216124555.eyplwam45jdfazr3@jekhomev>
Date: Sat, 16 Dec 2023 14:45:55 +0200
From: Yauhen Kharuzhy <jekhor@...il.com>
To: linux-input@...r.kernel.org, linux-iio@...r.kernel.org
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Jonathan Cameron <jic23@...nel.org>, linux-kernel@...r.kernel.org,
	Jiri Kosina <jikos@...nel.org>,
	Basavaraj Natikar <Basavaraj.Natikar@....com>
Subject: Re: [PATCH] iio: hid-sensor-als: Don't stop probing at non-supported
 attribute

On Sat, Dec 16, 2023 at 01:42:29PM +0200, Yauhen Kharuzhy wrote:
> Some ambient light sensors don't support color temperature and
> chromaticity attributes. The driver stops probing if it finds this.
> 
> To support sensors without of color temperature and chromaticity
> attributes, just skip them at probing if they weren't found.
> 
> Tested at Lenovo Yogabook YB1-X91L tablet.

Hi, It seems that Srinivas Pandruvada has posted another patch fixing
the same issue. So, drop my patch in favor of his one.

> 
> Signed-off-by: Yauhen Kharuzhy <jekhor@...il.com>
> ---
>  drivers/iio/light/hid-sensor-als.c | 39 ++++++++++++++++++------------
>  1 file changed, 23 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
> index f17304b54468..b711bac3bb2b 100644
> --- a/drivers/iio/light/hid-sensor-als.c
> +++ b/drivers/iio/light/hid-sensor-als.c
> @@ -314,8 +314,11 @@ static int als_parse_report(struct platform_device *pdev,
>  						usage_id,
>  						HID_USAGE_SENSOR_LIGHT_ILLUM,
>  						&st->als[i]);
> -		if (ret < 0)
> +		if (ret < 0) {
> +			dev_err(&pdev->dev,
> +				"Failed to setup Illuminance attribute\n");
>  			return ret;
> +		}
>  		als_adjust_channel_bit_mask(channels, i, st->als[i].size);
>  
>  		dev_dbg(&pdev->dev, "als %x:%x\n", st->als[i].index,
> @@ -326,14 +329,16 @@ static int als_parse_report(struct platform_device *pdev,
>  				usage_id,
>  				HID_USAGE_SENSOR_LIGHT_COLOR_TEMPERATURE,
>  				&st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP]);
> -	if (ret < 0)
> -		return ret;
> -	als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_COLOR_TEMP,
> -				st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].size);
> +	if (!ret) {
> +		dev_info(&pdev->dev, "Color temperature is supported\n");
> +		als_adjust_channel_bit_mask(channels,
> +			CHANNEL_SCAN_INDEX_COLOR_TEMP,
> +			st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].size);
>  
> -	dev_dbg(&pdev->dev, "als %x:%x\n",
> -		st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].index,
> -		st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].report_id);
> +		dev_dbg(&pdev->dev, "als %x:%x\n",
> +			st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].index,
> +			st->als[CHANNEL_SCAN_INDEX_COLOR_TEMP].report_id);
> +	}
>  
>  	for (i = 0; i < 2; i++) {
>  		int next_scan_index = CHANNEL_SCAN_INDEX_CHROMATICITY_X + i;
> @@ -342,23 +347,25 @@ static int als_parse_report(struct platform_device *pdev,
>  				HID_INPUT_REPORT, usage_id,
>  				HID_USAGE_SENSOR_LIGHT_CHROMATICITY_X + i,
>  				&st->als[next_scan_index]);
> -		if (ret < 0)
> -			return ret;
> -
> -		als_adjust_channel_bit_mask(channels,
> +		if (!ret) {
> +			dev_info(&pdev->dev,
> +				 "Light chromaticity %c is supported\n",
> +				 i ? 'Y' : 'X');
> +			als_adjust_channel_bit_mask(channels,
>  					CHANNEL_SCAN_INDEX_CHROMATICITY_X + i,
>  					st->als[next_scan_index].size);
>  
> -		dev_dbg(&pdev->dev, "als %x:%x\n",
> -			st->als[next_scan_index].index,
> -			st->als[next_scan_index].report_id);
> +			dev_dbg(&pdev->dev, "als %x:%x\n",
> +				st->als[next_scan_index].index,
> +				st->als[next_scan_index].report_id);
> +		}
>  	}
>  
>  	st->scale_precision = hid_sensor_format_scale(usage_id,
>  				&st->als[CHANNEL_SCAN_INDEX_INTENSITY],
>  				&st->scale_pre_decml, &st->scale_post_decml);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  /* Function to initialize the processing for usage id */
> -- 
> 2.43.0
> 

-- 
Yauhen Kharuzhy