Assume that if the pressure is given in newtons it should be normalized
to grams. If the pressure has no unit do not calculate resolution.
Signed-off-by: Angela Czubak <acz@xxxxxxxxxxxx>
---
drivers/hid/hid-input.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 81eb277dee91..b680641a30c0 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -257,6 +257,19 @@ __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
}
break;
+ case ABS_PRESSURE:
+ case ABS_MT_PRESSURE:
+ if (field->unit == 0xe111) { /* If newtons */
+ /* Convert to grams */
+ prev = physical_extents;
+ physical_extents *= 10197;
+ if (physical_extents < prev)
+ return 0;
+ unit_exponent -= 2;
+ } else if (field->unit != 0x101) { /* If not grams */
+ return 0;
+ }
+ break;
default:
return 0;
}
--
2.34.1.307.g9b7440fafd-goog
