HID: hid-input: Add digitizer tilt usage support

Add digitizer X Tilt and Y Tilt usage support along with resolution calculation.

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 22 insertions, 3 deletions

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 002781c5a616..22d8ce6d5a59 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -225,7 +225,10 @@ static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
          * Verify and convert units.
          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
          */
-        if (code == ABS_X || code == ABS_Y || code == ABS_Z) {
+        switch (code) {
+        case ABS_X:
+        case ABS_Y:
+        case ABS_Z:
                 if (field->unit == 0x11) {              /* If centimeters */
                         /* Convert to millimeters */
                         unit_exponent += 1;
@@ -239,7 +242,13 @@ static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
                 } else {
                         return 0;
                 }
-        } else if (code == ABS_RX || code == ABS_RY || code == ABS_RZ) {
+                break;
+
+        case ABS_RX:
+        case ABS_RY:
+        case ABS_RZ:
+        case ABS_TILT_X:
+        case ABS_TILT_Y:
                 if (field->unit == 0x14) {              /* If degrees */
                         /* Convert to radians */
                         prev = logical_extents;
@@ -250,7 +259,9 @@ static __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
                 } else if (field->unit != 0x12) {       /* If not radians */
                         return 0;
                 }
-        } else {
+                break;
+
+        default:
                 return 0;
         }
 
@@ -623,6 +634,14 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                         map_key_clear(BTN_TOOL_RUBBER);
                         break;
 
+                case 0x3d: /* X Tilt */
+                        map_abs_clear(ABS_TILT_X);
+                        break;
+
+                case 0x3e: /* Y Tilt */
+                        map_abs_clear(ABS_TILT_Y);
+                        break;
+
                 case 0x33: /* Touch */
                 case 0x42: /* TipSwitch */
                 case 0x43: /* TipSwitch2 */