[PATCH v2 0/2] scpi-sensors: Fix SCP sensor readings scale

[Carlo Caione]

On Fri, Mar 3, 2017 at 10:14 AM, Carlo Caione <carlo at caione.org> wrote:
> From: Carlo Caione <carlo at endlessm.com>
>
> 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()

gentle ping



-- 
Carlo Caione