linux-kernel - Re: [PATCH v3 4/6] iio: st_sensors: Add ACPI support for lsm303d to the LSM9DS0 IMU driver

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Date:   Tue, 2 May 2023 16:51:42 +0200
From:   Marius Hoch <mail@...iushoch.de>
To:     Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Denis Ciocca <denis.ciocca@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Marius Hoch <marius@...iushoch.de>
Subject: Re: [PATCH v3 4/6] iio: st_sensors: Add ACPI support for lsm303d to
 the LSM9DS0 IMU driver

Hi,

On 16/04/2023 01:11, Marius Hoch wrote:
<snip>
> diff --git a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> index 997b5ff792be..55f3738193af 100644
> --- a/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> +++ b/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c
> @@ -37,6 +37,12 @@ static const struct spi_device_id st_lsm9ds0_id_table[] = {
>   };
>   MODULE_DEVICE_TABLE(spi, st_lsm9ds0_id_table);
>   
> +static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
> +	{"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
> +	{ },
> +};
> +MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
> +
>   static const struct regmap_config st_lsm9ds0_regmap_config = {
>   	.reg_bits	= 8,
>   	.val_bits	= 8,
> @@ -72,6 +78,7 @@ static struct spi_driver st_lsm9ds0_driver = {
>   	.driver = {
>   		.name = "st-lsm9ds0-spi",
>   		.of_match_table = st_lsm9ds0_of_match,
> +		.acpi_match_table = st_lsm9ds0_acpi_match,
>   	},
>   	.probe = st_lsm9ds0_spi_probe,
>   	.id_table = st_lsm9ds0_id_table,
I just realized that these changes (the SPI ones, not the I2C ones) are 
entirely superfluous, and I'm not sure why I added this in the first 
place. In the Lenovo Yoga Tablet 2 series (which seem to be the only 
devices exposing this as "ACCL0001"), the device is accessible via I2C. 
Just to make sure, I re-tested the patch chain without this change.

@Jonathan: Shall I upload an entirely new patch set (v4), do this in a 
separate new clean up commit, or do you want to just drop these changes 
to drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.c? I'm fine with any of 
these options.

Cheers,
Marius