[PATCH 6/7] hid-asus: Allow adding custom hotkey handler logic

[Paolo Pisati <p.pisati@gmail.com>]

From: Joshua Leivenzon <hacker1024@users.sourceforge.net>

Respond to platform profile cycle key:
Fn + F on UX8406MA.

May vary across devices.

Signed-off-by: Joshua Leivenzon <hacker1024@users.sourceforge.net>
---
 drivers/hid/hid-asus.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index fe52fd63d61c6..37e3aec612b6d 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -29,6 +29,7 @@
 #include <linux/input/mt.h>
 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
 #include <linux/power_supply.h>
+#include <linux/platform_profile.h>
 #include <linux/leds.h>
 
 #include "hid-ids.h"
@@ -362,8 +363,21 @@ static int asus_event(struct hid_device *hdev, struct hid_field *field,
 	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_ASUSVENDOR &&
 	    (usage->hid & HID_USAGE) != 0x00 &&
 	    (usage->hid & HID_USAGE) != 0xff && !usage->type) {
-		hid_warn(hdev, "Unmapped Asus vendor usagepage code 0x%02x\n",
-			 usage->hid & HID_USAGE);
+
+		/*
+		 * Some reports do not map directly to standard keys, and need special
+		 * handling.
+		 */
+		switch (usage->hid & HID_USAGE) {
+			case 0x9d:
+				if (!value)
+					break;
+				return platform_profile_cycle();
+				break;
+			default:
+				hid_warn(hdev, "Unmapped Asus vendor usagepage code 0x%02x\n",
+					 usage->hid & HID_USAGE);
+		}
 	}
 
 	if (usage->type == EV_KEY && value) {
-- 
2.53.0