From e2f25ae64889ea7fe8a7556ee5fba91bc2a0eab8 Mon Sep 17 00:00:00 2001 From: Alper Nebi Yasak Date: Thu, 18 Aug 2022 17:27:22 +0300 Subject: udev: hwdb: Match iio sensors based on their label The IIO subsystem exposes a 'label' sysfs file to help userspace better identify its devices [1]. Standardized labels include the sensor type along with its location, including 'accel-base' and 'accel-display'. Most Chrome OS boards have two accelerometers that are indistinguishable except for this label (or a 'location' sysfs file before Linux v6.0), and need different mounting matrix corrections based on their location. Add a udev rule that matches hwdb entries using this label, so we can correct both accelerometers on these devices with hwdb entries. The existing rules and hwdb entries are not modified to keep potential out-of-tree entries working, but new entries in this form will override existing ones. Also add currently standardized labels to parse-hwdb.py. [1] https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-bus-iio --- rules.d/60-sensor.rules | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'rules.d') diff --git a/rules.d/60-sensor.rules b/rules.d/60-sensor.rules index 7b9b7d2887..99b8f5fc7a 100644 --- a/rules.d/60-sensor.rules +++ b/rules.d/60-sensor.rules @@ -2,6 +2,11 @@ ACTION=="remove", GOTO="sensor_end" +# device matching the sensor's label, name and the machine's DMI data for IIO devices +SUBSYSTEM=="iio", KERNEL=="iio*", SUBSYSTEMS=="usb|i2c|platform", ATTR{label}!="", \ + IMPORT{builtin}="hwdb 'sensor:$attr{label}:modalias:$attr{modalias}:$attr{[dmi/id]modalias}'", \ + GOTO="sensor_end" + # device matching the sensor's name and the machine's DMI data for IIO devices SUBSYSTEM=="iio", KERNEL=="iio*", SUBSYSTEMS=="usb|i2c|platform", \ IMPORT{builtin}="hwdb 'sensor:modalias:$attr{modalias}:$attr{[dmi/id]modalias}'", \ -- cgit v1.2.1