From: Carlo Caione <carlo@xxxxxxxxxxxx> The implementation details for SCPI seems to suggest that the sensor readings must be reported by SCP using a well defined scale (millidegree Celsius for temperature, millivolts for voltage, milliamperes for current, microwatts for power and microjoules for energy). This is also important for the interaction with other subsystems: for example both the thermal sub-system and the hwmon sysfs interface expect the temperature expressed in millidegree Celsius. Unfortunately since this behaviour is dependent on the firmware implementation there are cases where the sensor readings are reported using a different scale. For example in the Amlogic SoCs the temperature is reported in degree and not millidegree Celsius. In this patchset we introduce a new DT property `scpi,sensors-scale` that is used by the scpi-hwmon driver to convert the sensor readings to the expected scale. v2: - Added data validation (scale != 0) - s/unsigned int/u32/ for the array - Switched to array initialiser notation - Introduced scpi_scale_reading() v3: - scpi_scale_reading marked as static Carlo Caione (2): Documentation: bindings: Introduce scpi,sensors-scale hwmon: (scpi) Fix the scale of SCP sensor readings Documentation/devicetree/bindings/arm/arm,scpi.txt | 18 ++++++++++++ drivers/hwmon/scpi-hwmon.c | 34 ++++++++++++++++++++++ 2 files changed, 52 insertions(+) -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
