| Message ID | 20211221191743.1893185-12-acz@semihalf.com |
|---|---|
| State | New |
| Headers | show |
| Series | *** Implement simple haptic HID support *** | expand |
On Tue, Dec 21, 2021 at 07:17:36PM +0000, Angela Czubak wrote: > 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@semihalf.com> > --- > 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 */ Using a named constant would be great. > + /* Convert to grams */ If you could add to the comment that 1 newton is 101.97 grams that would be great. > + 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 > Thanks.
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; }
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@semihalf.com> --- drivers/hid/hid-input.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)