linux-kernel - Re: [PATCH V1 5/5] iio: accel: bmi088: modifed the device name.

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Message-ID: <CA+U=DsoTgX5kjVshqKYa0rcL7MMWER9Q5njnVd7WRpkq+YCAHQ@mail.gmail.com>
Date:   Tue, 10 May 2022 10:35:31 +0300
From:   Alexandru Ardelean <ardeleanalex@...il.com>
To:     LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        mchehab+huawei@...nel.org, linux-iio <linux-iio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V1 5/5] iio: accel: bmi088: modifed the device name.

On Mon, May 9, 2022 at 4:46 PM LI Qingwu
<Qing-wu.Li@...ca-geosystems.com.cn> wrote:
>
> It is possible to have multiple sensors connected on the same platform,
> The commit makes it possible to obtain the device name for
> the different chips according to the connected chip ID.
>
> To be compatible with previous versions, renambmi088a to bmi088-accel.
>
> Signed-off-by: LI Qingwu <Qing-wu.Li@...ca-geosystems.com.cn>
> ---
>  drivers/iio/accel/bmi088-accel-core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iio/accel/bmi088-accel-core.c b/drivers/iio/accel/bmi088-accel-core.c
> index 7c78cfb321ee..8f6920dc2ad9 100644
> --- a/drivers/iio/accel/bmi088-accel-core.c
> +++ b/drivers/iio/accel/bmi088-accel-core.c
> @@ -461,7 +461,7 @@ static const struct iio_chan_spec bmi088_accel_channels[] = {
>
>  static const struct bmi088_accel_chip_info bmi088_accel_chip_info_tbl[] = {
>         [0] = {
> -               .name = "bmi088a",
> +               .name = "bmi088-accel",
>                 .chip_id = 0x1E,
>                 .channels = bmi088_accel_channels,
>                 .num_channels = ARRAY_SIZE(bmi088_accel_channels),
> @@ -561,7 +561,7 @@ int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap,
>
>         indio_dev->channels = data->chip_info->channels;
>         indio_dev->num_channels = data->chip_info->num_channels;
> -       indio_dev->name = name ? name : data->chip_info->name;

This makes the 'name' parameter unused now.
Which begs the question if it should be removed.

One other detail is that the device-tree will need to set a compatible
string to 'bmi088-accel' and this will work (for SPI devices) for all
chip-types (including the new ones).

This raises the question of whether we should update the new chips in
the DT yaml doc here?

Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml

properties:
  compatible:
    enum:
      - bosch,bmi088-accel

If yes, then the 'drivers/iio/accel/bmi088-accel-spi.c' file also
requires an update with the new device-names.

> +       indio_dev->name = data->chip_info->name;
>         indio_dev->available_scan_masks = bmi088_accel_scan_masks;
>         indio_dev->modes = INDIO_DIRECT_MODE;
>         indio_dev->info = &bmi088_accel_info;
> --
> 2.25.1
>