linux-kernel - Re: [PATCH 1/3] iio: hid-sensors: Move get sensitivity attribute to hid-sensor-common

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Date:   Sat, 23 Jan 2021 16:12:28 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Ye Xiang <xiang.ye@...el.com>
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 1/3] iio: hid-sensors: Move get sensitivity attribute to
 hid-sensor-common

On Wed, 20 Jan 2021 15:47:04 +0800
Ye Xiang <xiang.ye@...el.com> wrote:

> No functional change has been made with this patch. The main intent here
> is to reduce code repetition of get sensitivity attribute.
> 
> In the current implementation, sensor_hub_input_get_attribute_info() is
> called from multiple drivers to get attribute info for sensitivity
> field. Moving this to common place will avoid code repetition.
> 
> Signed-off-by: Ye Xiang <xiang.ye@...el.com>

One trivial note inline about an accidental indentation change. If that's
all I find in the series I'll fix it up whilst applying.

Thanks,

Jonathan

...
>  /* Channel definitions */
>  static const struct iio_chan_spec magn_3d_channels[] = {
>  	{
> @@ -448,32 +453,11 @@ static int magn_3d_parse_report(struct platform_device *pdev,
>  			&st->rot_attr.scale_pre_decml,
>  			&st->rot_attr.scale_post_decml);
>  
> -	/* Set Sensitivity field ids, when there is no individual modifier */
> -	if (st->magn_flux_attributes.sensitivity.index < 0) {
> -		sensor_hub_input_get_attribute_info(hsdev,
> -			HID_FEATURE_REPORT, usage_id,
> -			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
> -			HID_USAGE_SENSOR_DATA_ORIENTATION,
> -			&st->magn_flux_attributes.sensitivity);
> -		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
> -			st->magn_flux_attributes.sensitivity.index,
> -			st->magn_flux_attributes.sensitivity.report_id);
> -	}
> -	if (st->magn_flux_attributes.sensitivity.index < 0) {
> -		sensor_hub_input_get_attribute_info(hsdev,
> -			HID_FEATURE_REPORT, usage_id,
> -			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
> -			HID_USAGE_SENSOR_ORIENT_MAGN_FLUX,
> -			&st->magn_flux_attributes.sensitivity);
> -		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
> -			st->magn_flux_attributes.sensitivity.index,
> -			st->magn_flux_attributes.sensitivity.report_id);
> -	}
>  	if (st->rot_attributes.sensitivity.index < 0) {
>  		sensor_hub_input_get_attribute_info(hsdev,
>  			HID_FEATURE_REPORT, usage_id,
>  			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
> -			HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
> +				HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,

This change of alignment shouldn't be here.

>  			&st->rot_attributes.sensitivity);
>  		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
>  			st->rot_attributes.sensitivity.index,
> @@ -507,12 +491,16 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
>  
>  	ret = hid_sensor_parse_common_attributes(hsdev,
>  				HID_USAGE_SENSOR_COMPASS_3D,
> -				&magn_state->magn_flux_attributes);
> +				&magn_state->magn_flux_attributes,
> +				magn_3d_sensitivity_addresses,
> +				ARRAY_SIZE(magn_3d_sensitivity_addresses));
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to setup common attributes\n");
>  		return ret;
>  	}
>  	magn_state->rot_attributes = magn_state->magn_flux_attributes;
> +	/* sensitivity of rot_attribute is not the same as magn_flux_attributes */
> +	magn_state->rot_attributes.sensitivity.index = -1;
>  
>  	ret = magn_3d_parse_report(pdev, hsdev,
>  				&channels, &chan_count,