Re: [PATCH 1/2] iio:adc:axp20x: add support for NTC thermistor

Maxime Ripard
2021-11-22T10:48:35Z

On Thu, Nov 18, 2021 at 05:12:32PM +0300, Evgeny Boger wrote:
> Most AXPxxx-based reference designs place a 10k NTC thermistor on a
> TS pin. When appropriately configured, AXP PMICs will inject fixed
> current (80uA by default) into TS pin and measure the voltage across a
> thermistor. The PMIC itself will by default compare this voltage with
> predefined thresholds and disable battery charging whenever
> the battery is too hot or too cold.
>
> Alternatively, the TS pin can be configured as general-purpose
> ADC input. This mode is not supported by the driver.
>
> This patch allows reading the voltage on the TS pin. It can be then
> either processed by userspace or used by kernel consumer like hwmon
> ntc thermistor driver.
>
> Signed-off-by: Evgeny Boger <boger@wirenboard.com>

Acked-by: Maxime Ripard <maxime@cerno.tech>

Maxime