1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/thermal/kirkwood_thermal.c b/drivers/thermal/kirkwood_thermal.c
index e5500edb5285..dfeceaffbc03 100644
--- a/drivers/thermal/kirkwood_thermal.c
+++ b/drivers/thermal/kirkwood_thermal.c
@@ -41,21 +41,21 @@ static int kirkwood_get_temp(struct thermal_zone_device *thermal,
         reg = readl_relaxed(priv->sensor);
 
         /* Valid check */
-        if (!(reg >> KIRKWOOD_THERMAL_VALID_OFFSET) &
-            KIRKWOOD_THERMAL_VALID_MASK) {
+        if (!((reg >> KIRKWOOD_THERMAL_VALID_OFFSET) &
+            KIRKWOOD_THERMAL_VALID_MASK)) {
                 dev_err(&thermal->device,
                         "Temperature sensor reading not valid\n");
                 return -EIO;
         }
 
         /*
-         * Calculate temperature. See Section 8.10.1 of the 88AP510,
-         * datasheet, which has the same sensor.
-         * Documentation/arm/Marvell/README
+         * Calculate temperature. According to Marvell internal
+         * documentation the formula for this is:
+         * Celsius = (322-reg)/1.3625
          */
         reg = (reg >> KIRKWOOD_THERMAL_TEMP_OFFSET) &
                 KIRKWOOD_THERMAL_TEMP_MASK;
-        *temp = ((2281638UL - (7298*reg)) / 10);
+        *temp = ((3220000000UL - (10000000UL * reg)) / 13625);
 
         return 0;
 }