HID: pidff: Define values used in pidff_find_special_fields

Makes it clear where did these values came from

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
Reviewed-by: Michał Kopeć <michal@nozomi.space>
Reviewed-by: Paul Dino Jones <paul@spacefreak18.xyz>
Tested-by: Paul Dino Jones <paul@spacefreak18.xyz>
Tested-by: Cristóferson Bueno <cbueno81@gmail.com>
Tested-by: Pablo Cisneros <patchkez@protonmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

Author: Lawstorant

drivers/hid/usbhid/hid-pidff.c

@@ -48,6 +48,14 @@ static const u8 pidff_reports[] = {
 /* device_control is really 0x95, but 0x96 specified as it is the usage of
 the only field in that report */
 
+/* PID special fields */
+
+#define PID_EFFECT_TYPE			0x25
+#define PID_DIRECTION			0x57
+#define PID_EFFECT_OPERATION_ARRAY	0x78
+#define PID_BLOCK_LOAD_STATUS		0x8b
+#define PID_DEVICE_CONTROL_ARRAY	0x96
+
 /* Value usage tables used to put fields and values into arrays */
 
 #define PID_EFFECT_BLOCK_INDEX	0
@@ -1046,23 +1054,24 @@ static int pidff_find_special_fields(struct pidff_device *pidff)
 
 	pidff->create_new_effect_type =
 		pidff_find_special_field(pidff->reports[PID_CREATE_NEW_EFFECT],
-					 0x25, 1);
+					 PID_EFFECT_TYPE, 1);
 	pidff->set_effect_type =
 		pidff_find_special_field(pidff->reports[PID_SET_EFFECT],
-					 0x25, 1);
+					 PID_EFFECT_TYPE, 1);
 	pidff->effect_direction =
 		pidff_find_special_field(pidff->reports[PID_SET_EFFECT],
-					 0x57, 0);
+					 PID_DIRECTION, 0);
 	pidff->device_control =
 		pidff_find_special_field(pidff->reports[PID_DEVICE_CONTROL],
-			0x96, !(pidff->quirks & HID_PIDFF_QUIRK_PERMISSIVE_CONTROL));
+			PID_DEVICE_CONTROL_ARRAY,
+			!(pidff->quirks & HID_PIDFF_QUIRK_PERMISSIVE_CONTROL));
 
 	pidff->block_load_status =
 		pidff_find_special_field(pidff->reports[PID_BLOCK_LOAD],
-					 0x8b, 1);
+					 PID_BLOCK_LOAD_STATUS, 1);
 	pidff->effect_operation_status =
 		pidff_find_special_field(pidff->reports[PID_EFFECT_OPERATION],
-					 0x78, 1);
+					 PID_EFFECT_OPERATION_ARRAY, 1);
 
 	hid_dbg(pidff->hid, "search done\n");