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.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
---
drivers/thermal/armada_thermal.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index aafcc4d..e228132 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -56,6 +56,7 @@ struct armada_thermal_data {
unsigned long coef_b;
unsigned long coef_m;
unsigned long coef_div;
+ bool inverted;
/* Offset and mask to access the sensor temperature */
unsigned int temp_offset;
@@ -138,7 +139,10 @@ static int armada_get_temp(struct thermal_zone_device *thermal,
m = priv->data->coef_m;
div = priv->data->coef_div;
- *temp = (b - (m * reg)) / div;
+ if (priv->data->inverted)
+ *temp = ((m * reg) - b) / div;
+ else
+ *temp = (b - (m * reg)) / div;
return 0;
}
--
1.9.1
--
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
