hwmon: lis3: Adjust fuzziness for 8 bit device

Default fuziness is set smaller for 8 device.
In 12 bit device LSB is quite close to 1 mg
(mg = 1 / 1000 of earth gravity).
In 8bit device LSB is about 18 mg.
Set fuziness to 1 for 8 bit device.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

1 files changed, 14 insertions, 4 deletions

diff --git a/drivers/hwmon/lis3lv02d.c b/drivers/hwmon/lis3lv02d.c
index 3109eb8648ce..a4929b72506e 100644
--- a/drivers/hwmon/lis3lv02d.c
+++ b/drivers/hwmon/lis3lv02d.c
@@ -71,8 +71,10 @@
 #define LIS3_SENSITIVITY_12B            ((LIS3_ACCURACY * 1000) / 1024)
 #define LIS3_SENSITIVITY_8B             (18 * LIS3_ACCURACY)
 
-#define LIS3_DEFAULT_FUZZ               3
-#define LIS3_DEFAULT_FLAT               3
+#define LIS3_DEFAULT_FUZZ_12B           3
+#define LIS3_DEFAULT_FLAT_12B           3
+#define LIS3_DEFAULT_FUZZ_8B            1
+#define LIS3_DEFAULT_FLAT_8B            1
 
 struct lis3lv02d lis3_dev = {
         .misc_wait   = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
@@ -564,8 +566,16 @@ int lis3lv02d_joystick_enable(void)
 
         set_bit(EV_ABS, input_dev->evbit);
         max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
-        fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY;
-        flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY;
+        if (lis3_dev.whoami == WAI_12B) {
+                fuzz = LIS3_DEFAULT_FUZZ_12B;
+                flat = LIS3_DEFAULT_FLAT_12B;
+        } else {
+                fuzz = LIS3_DEFAULT_FUZZ_8B;
+                flat = LIS3_DEFAULT_FLAT_8B;
+        }
+        fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY;
+        flat = (flat * lis3_dev.scale) / LIS3_ACCURACY;
+
         input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
         input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
         input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);