Merge tag 'platform-drivers-x86-goodix-v5.14-1' into review-hans

[linux-2.6-microblaze.git] / drivers / iio / gyro / mpu3050-core.c

diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
index ac90be0..f17a935 100644 (file)
--- a/drivers/iio/gyro/mpu3050-core.c
+++ b/drivers/iio/gyro/mpu3050-core.c
@@ -272,7 +272,16 @@ static int mpu3050_read_raw(struct iio_dev *indio_dev,
        case IIO_CHAN_INFO_OFFSET:
                switch (chan->type) {
                case IIO_TEMP:
-                       /* The temperature scaling is (x+23000)/280 Celsius */
+                       /*
+                        * The temperature scaling is (x+23000)/280 Celsius
+                        * for the "best fit straight line" temperature range
+                        * of -30C..85C.  The 23000 includes room temperature
+                        * offset of +35C, 280 is the precision scale and x is
+                        * the 16-bit signed integer reported by hardware.
+                        *
+                        * Temperature value itself represents temperature of
+                        * the sensor die.
+                        */
                        *val = 23000;
                        return IIO_VAL_INT;
                default:
@@ -329,7 +338,7 @@ static int mpu3050_read_raw(struct iio_dev *indio_dev,
                                goto out_read_raw_unlock;
                        }
 
-                       *val = be16_to_cpu(raw_val);
+                       *val = (s16)be16_to_cpu(raw_val);
                        ret = IIO_VAL_INT;
 
                        goto out_read_raw_unlock;