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iio: accel: bmc150: Set label based on accel-location on 2-accel yoga-style 2-in-1s

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Some 2-in-1 laptops / convertibles with 360° (yoga-style) hinges,
use 2 bmc150 accelerometers, defined by a single BOSC0200 ACPI
device node (1 in their base and 1 in their display).

Since in this case we know the location of each accelerometer,
set the label for the accelerometers to the standardized
"accel-display" resp. "accel-base" labels. This way userspace
can use the labels to get the location.

This was tested on a Lenovo ThinkPad Yoga 11e 4th gen (N3450 CPU).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210207160901.110643-3-hdegoede@redhat.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Hans de Goede 2021-02-07 17:09:00 +01:00 committed by Jonathan Cameron
parent 6f71bf1991
commit 788348a5f7
1 changed files with 12 additions and 6 deletions
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18
drivers/iio/accel/bmc150-accel-core.c
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@ -443,26 +443,32 @@ static bool bmc150_apply_acpi_orientation(struct device *dev,
struct iio_mount_matrix *orientation)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct acpi_device *adev = ACPI_COMPANION(dev);
char *name, *alt_name, *label, *str;
union acpi_object *obj, *elements;
char *name, *alt_name, *str;
acpi_status status;
int i, j, val[3];
if (!adev || !acpi_dev_hid_uid_match(adev, "BOSC0200", NULL))
return false;
if (strcmp(dev_name(dev), "i2c-BOSC0200:base") == 0)
if (strcmp(dev_name(dev), "i2c-BOSC0200:base") == 0) {
alt_name = "ROMK";
else
label = "accel-base";
} else {
alt_name = "ROMS";
label = "accel-display";
}
if (acpi_has_method(adev->handle, "ROTM"))
if (acpi_has_method(adev->handle, "ROTM")) {
name = "ROTM";
else if (acpi_has_method(adev->handle, alt_name))
} else if (acpi_has_method(adev->handle, alt_name)) {
name = alt_name;
else
indio_dev->label = label;
} else {
return false;
}
status = acpi_evaluate_object(adev->handle, name, NULL, &buffer);
if (ACPI_FAILURE(status)) {