Commit fd2c94d5 authored May 06, 2014 by Ezequiel Garcia Committed by Zhang Rui May 15, 2014

thermal: armada: Allow to specify an 'inverted readout' sensor



In order to support inverted-formula thermal sensor readout, this commit
introduces an 'inverted' field in the SoC-specific structure which
allows to specify an inversion of the temperature formula.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

parent 04bf3d7e

drivers/thermal/armada_thermal.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -56,6 +56,7 @@ struct armada_thermal_data {
		unsigned long coef_b;
		unsigned long coef_m;
		unsigned long coef_div;
		bool inverted;

		/* Register shift and mask to access the sensor temperature */
		unsigned int temp_shift;
		@@ -138,6 +139,9 @@ static int armada_get_temp(struct thermal_zone_device *thermal,
		m = priv->data->coef_m;
		div = priv->data->coef_div;

		if (priv->data->inverted)
		temp = ((m reg) - b) / div;
		else
		temp = (b - (m reg)) / div;
		return 0;
		}