1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/hwmon/scmi-hwmon.c b/drivers/hwmon/scmi-hwmon.c
index a80183a488c5..0c93fc5ca762 100644
--- a/drivers/hwmon/scmi-hwmon.c
+++ b/drivers/hwmon/scmi-hwmon.c
@@ -18,6 +18,50 @@ struct scmi_sensors {
         const struct scmi_sensor_info **info[hwmon_max];
 };
 
+static inline u64 __pow10(u8 x)
+{
+        u64 r = 1;
+
+        while (x--)
+                r *= 10;
+
+        return r;
+}
+
+static int scmi_hwmon_scale(const struct scmi_sensor_info *sensor, u64 *value)
+{
+        s8 scale = sensor->scale;
+        u64 f;
+
+        switch (sensor->type) {
+        case TEMPERATURE_C:
+        case VOLTAGE:
+        case CURRENT:
+                scale += 3;
+                break;
+        case POWER:
+        case ENERGY:
+                scale += 6;
+                break;
+        default:
+                break;
+        }
+
+        if (scale == 0)
+                return 0;
+
+        if (abs(scale) > 19)
+                return -E2BIG;
+
+        f = __pow10(abs(scale));
+        if (scale > 0)
+                *value *= f;
+        else
+                *value = div64_u64(*value, f);
+
+        return 0;
+}
+
 static int scmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
                            u32 attr, int channel, long *val)
 {
@@ -29,6 +73,10 @@ static int scmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
 
         sensor = *(scmi_sensors->info[type] + channel);
         ret = h->sensor_ops->reading_get(h, sensor->id, false, &value);
+        if (ret)
+                return ret;
+
+        ret = scmi_hwmon_scale(sensor, &value);
         if (!ret)
                 *val = value;