linux-kernel - Re: [PATCH v2 2/2] iio: imu: lsm6dsx: Add alternative ACPI mount matrix retrieval

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Message-ID: <aYHc08VZFQOlApIu@smile.fi.intel.com>
Date: Tue, 3 Feb 2026 13:32:35 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Samuel Dionne-Riel <samuel@...nne-riel.com>
Cc: Lorenzo Bianconi <lorenzo@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] iio: imu: lsm6dsx: Add alternative ACPI mount
 matrix retrieval

On Sun, Feb 01, 2026 at 05:54:50PM -0500, Samuel Dionne-Riel wrote:
> This uses the SLA0 matrix, which is how the SMOCF05 configuration
> exposes the mounting information for the accelerometer.
> 
> On a limited sample size of one (1) unit, the SLG0 matrix is the
> identity matrix. It is unknown how the SLG0 mounting matrix would
> logically affect the data, if it differed from the identity matrix.
> After all, the IMU is mounted as one single unit, its mounting can't
> differ on the gyroscope compared to the accelerometer.
> 
> The new `st_lsm6dsx_read_acpi_mount_matrix` function currently only

st_lsm6dsx_read_acpi_mount_matrix()

> implements the *known* ACPI methods found in the wild, but the windows

Windows

> driver seems to indicate more integration-specific methods could exist.

...

> +static bool st_lsm6dsx_read_acpi_mount_matrix(struct device *dev,
> +				      struct iio_mount_matrix *orientation)
> +{
> +	return iio_read_acpi_mount_matrix(dev, orientation, "ROTM") ||
> +		iio_read_acpi_mount_matrix(dev, orientation, "SLA0");

Indentation is incorrect.

> +}

-- 
With Best Regards,
Andy Shevchenko