linux-kernel - Re: [PATCH V8 5/5] iio: accel: sca3300: Add inclination channels

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Date:   Sat, 28 May 2022 18:23:14 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
Cc:     lars@...afoo.de, robh+dt@...nel.org, tomas.melin@...sala.com,
        andy.shevchenko@...il.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        thomas.haemmerle@...ca-geosystems.com, linux-iio@...r.kernel.org
Subject: Re: [PATCH V8 5/5] iio: accel: sca3300: Add inclination channels

On Mon, 23 May 2022 06:23:12 +0000
LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn> wrote:

> Different from SCA3300, SCL3300 can output inclination angles.
> Angles are formed from acceleration with following equations:
> ANG_X = atan2(accx , sqrt(pow(accy , 2) + pow(accz , 2)))
> ANG_Y = atan2(accy , sqrt(pow(accx , 2) + pow(accz , 2)))
> ANG_Z = atan2(accz , sqrt(pow(accx , 2) + pow(accy , 2)))
> 
> The commit adds the output of the raw value, scale
> and scale_available of angles.
> 
> New interfaces:
>   in_incli_scale
>   in_incli_scale_available
>   in_incli_x_raw
>   in_incli_y_raw
>   in_incli_z_raw
> Data converted by application of scale to degrees.
> 
> Signed-off-by: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
> ---

Hi,

One comment inline.

>  struct sca3300_chip_info {
>  	const char *name;
>  	const unsigned long *scan_masks;
> @@ -123,12 +167,16 @@ struct sca3300_chip_info {
>  	u8 num_accel_scales;
>  	const int (*accel_scale)[2];
>  	const int *accel_scale_map;
> +	const int (*incli_scale)[2];
> +	const int *incli_scale_map;
> +	u8 num_incli_scales;
>  	u8 num_freqs;
>  	const int *freq_table;
>  	const int *freq_map;
>  	const int *avail_modes_table;
>  	u8 num_avail_modes;
>  	u8 chip_id;
> +	bool angle;

"angle" is a bit vague.  Perhaps "angle_supported"?

Otherwise this looks good to me.

Thanks,

Jonathan