On Tue, Dec 13, 2016 at 03:33:32PM +0100, Quentin Schulz wrote: > The Allwinner SoCs all have an ADC that can also act as a touchscreen > controller and a thermal sensor. This patch adds the ADC driver which is > based on the MFD for the same SoCs ADC. > > This also registers the thermal adc channel in the iio map array so > iio_hwmon could use it without modifying the Device Tree. This registers > the driver in the thermal framework. > > The thermal sensor requires the IP to be in touchscreen mode to return > correct values. Therefore, if the user is continuously reading the ADC > channel(s), the thermal framework in which the thermal sensor is > registered will switch the IP in touchscreen mode to get a temperature > value and requires a delay of 100ms (because of the mode switching), > then the ADC will switch back to ADC mode and requires also a delay of > 100ms. If the ADC readings are critical to user and the SoC temperature > is not, this driver is capable of not registering the thermal sensor in > the thermal framework and thus, "quicken" the ADC readings. > > This driver probes on three different platform_device_id to take into > account slight differences (registers bit and temperature computation) > between Allwinner SoCs ADCs. > > Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx> > Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> I already gave my Acked-by apparently, but I'll say it again :) Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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