The temperature/humidity sensors of the STS3x/SHT3x family are calibrated and factory-programmed with a unique serial number. For some sensors, this serial number can be used to obtain a calibration certificate via an API provided by the manufacturer (Sensirion). Expose the serial number via debugfs. A "sht3x" debugfs directory is created when loading the driver. Within this parent directory, another directory is created for each sensor instantiation which contains the serial number. The sensor-specific directories are managed by devres, such that they are cleaned up upon deinstantation or if hwmon registration fails. The top-level directory is removed when the driver is unloaded. Changelog ========= v3 -> v4: - Remove debugfs entry with devm_add_action_or_reset() v2 -> v3: - Remove #ifdef for debugfs - Add debugfs cleanup - Do not expose serial number if read fails v1 -> v2: - Change from sysfs to debugfs - Add documentation improvements Stefan Gloor (1): hwmon: (sht3x) read out sensor serial number Documentation/hwmon/sht3x.rst | 11 ++++++ drivers/hwmon/sht3x.c | 66 ++++++++++++++++++++++++++++++++++- 2 files changed, 76 insertions(+), 1 deletion(-) -- 2.41.0
