thermal: armada: Fix possible overflow in the Armada 380 thermal sensor formula
Update the coefficients so the calculation will not overrun the
unsigned long 32bits boundary
Signed-off-by: Nadav Haklai <[email protected]>
Reviewed-by: Victor Axelrod <[email protected]>
Reviewed-by: Neta Zur Hershkovits <[email protected]>
Signed-off-by: Gregory CLEMENT <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index 26b8d32..ae75328 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -224,9 +224,9 @@
.is_valid_shift = 10,
.temp_shift = 0,
.temp_mask = 0x3ff,
- .coef_b = 2931108200UL,
- .coef_m = 5000000UL,
- .coef_div = 10502,
+ .coef_b = 1172499100UL,
+ .coef_m = 2000096UL,
+ .coef_div = 4201,
.inverted = true,
};
