toshiba_acpi: Add Hotkey Event Type function and definitions

This patch adds support to query the "Hotkey Event Type" the system
supports.

There are two main event types (so far), 0x10 and 0x11, with the
first being all those laptops that have the old keyboard layout, and
the latter all those new laptops with the new keyboard layout.
Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/toshiba_acpi.c

@@ -116,6 +116,7 @@ MODULE_LICENSE("GPL");
 #define HCI_KBD_ILLUMINATION		0x0095
 #define HCI_ECO_MODE			0x0097
 #define HCI_ACCELEROMETER2		0x00a6
+#define HCI_SYSTEM_INFO			0xc000
 #define SCI_PANEL_POWER_ON		0x010d
 #define SCI_ILLUMINATION		0x014e
 #define SCI_USB_SLEEP_CHARGE		0x0150
@@ -133,6 +134,8 @@ MODULE_LICENSE("GPL");
 #define HCI_LCD_BRIGHTNESS_SHIFT	(16-HCI_LCD_BRIGHTNESS_BITS)
 #define HCI_LCD_BRIGHTNESS_LEVELS	(1 << HCI_LCD_BRIGHTNESS_BITS)
 #define HCI_MISC_SHIFT			0x10
+#define HCI_SYSTEM_TYPE1		0x10
+#define HCI_SYSTEM_TYPE2		0x11
 #define HCI_VIDEO_OUT_LCD		0x1
 #define HCI_VIDEO_OUT_CRT		0x2
 #define HCI_VIDEO_OUT_TV		0x4
@@ -1149,6 +1152,28 @@ static int toshiba_usb_three_set(struct toshiba_acpi_dev *dev, u32 state)
 	return 0;
 }
 
+/* Hotkey Event type */
+static int toshiba_hotkey_event_type_get(struct toshiba_acpi_dev *dev,
+					 u32 *type)
+{
+	u32 val1 = 0x03;
+	u32 val2 = 0;
+	u32 result;
+
+	result = hci_read2(dev, HCI_SYSTEM_INFO, &val1, &val2);
+	if (result == TOS_FAILURE) {
+		pr_err("ACPI call to get System type failed\n");
+		return -EIO;
+	} else if (result == TOS_NOT_SUPPORTED) {
+		pr_info("System type not supported\n");
+		return -ENODEV;
+	}
+
+	*type = val2;
+
+	return 0;
+}
+
 /* Bluetooth rfkill handlers */
 
 static u32 hci_get_bt_present(struct toshiba_acpi_dev *dev, bool *present)