platform/x86: asus-wmi: Simplify tablet-mode-switch probing

The 3 different tablet-mode-switch initialization paths repeat a lot
of the same code. Add a helper function for this.

This also makes the error-handling for the kbd_dock_devid case consistent
with the other 2 cases.

Cc: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220824151145.1448010-1-hdegoede@redhat.com

drivers/platform/x86/asus-wmi.c

@@ -484,13 +484,28 @@ static bool asus_wmi_dev_is_present(struct asus_wmi *asus, u32 dev_id)
 }
 
 /* Input **********************************************************************/
+static void asus_wmi_tablet_sw_init(struct asus_wmi *asus, u32 dev_id, int event_code)
+{
+	struct device *dev = &asus->platform_device->dev;
+	int result;
+
+	result = asus_wmi_get_devstate_simple(asus, dev_id);
+	if (result < 0)
+		asus->driver->quirks->tablet_switch_mode = asus_wmi_no_tablet_switch;
+	if (result >= 0) {
+		input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
+		input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
+	} else if (result == -ENODEV) {
+		dev_err(dev, "This device has tablet-mode-switch quirk but got ENODEV checking it. This is a bug.");
+	} else {
+		dev_err(dev, "Error checking for tablet-mode-switch: %d\n", result);
+	}
+}
 
 static int asus_wmi_input_init(struct asus_wmi *asus)
 {
-	struct device *dev;
-	int err, result;
-
-	dev = &asus->platform_device->dev;
+	struct device *dev = &asus->platform_device->dev;
+	int err;
 
 	asus->inputdev = input_allocate_device();
 	if (!asus->inputdev)
@@ -510,39 +525,13 @@ static int asus_wmi_input_init(struct asus_wmi *asus)
 	case asus_wmi_no_tablet_switch:
 		break;
 	case asus_wmi_kbd_dock_devid:
-		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_KBD_DOCK);
-		if (result >= 0) {
-			input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
-			input_report_switch(asus->inputdev, SW_TABLET_MODE, !result);
-		} else if (result != -ENODEV) {
-			dev_err(dev, "Error checking for keyboard-dock: %d\n", result);
-		}
+		asus_wmi_tablet_sw_init(asus, ASUS_WMI_DEVID_KBD_DOCK, NOTIFY_KBD_DOCK_CHANGE);
 		break;
 	case asus_wmi_lid_flip_devid:
-		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
-		if (result < 0)
-			asus->driver->quirks->tablet_switch_mode = asus_wmi_no_tablet_switch;
-		if (result >= 0) {
-			input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
-			input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
-		} else if (result == -ENODEV) {
-			dev_err(dev, "This device has lid_flip quirk but got ENODEV checking it. This is a bug.");
-		} else {
-			dev_err(dev, "Error checking for lid-flip: %d\n", result);
-		}
+		asus_wmi_tablet_sw_init(asus, ASUS_WMI_DEVID_LID_FLIP, NOTIFY_LID_FLIP);
 		break;
 	case asus_wmi_lid_flip_rog_devid:
-		result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP_ROG);
-		if (result < 0)
-			asus->driver->quirks->tablet_switch_mode = asus_wmi_no_tablet_switch;
-		if (result >= 0) {
-			input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
-			input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
-		} else if (result == -ENODEV) {
-			dev_err(dev, "This device has lid-flip-rog quirk but got ENODEV checking it. This is a bug.");
-		} else {
-			dev_err(dev, "Error checking for lid-flip: %d\n", result);
-		}
+		asus_wmi_tablet_sw_init(asus, ASUS_WMI_DEVID_LID_FLIP_ROG, NOTIFY_LID_FLIP_ROG);
 		break;
 	}