platform/x86: wireless-hotkey: use ACPI HID as phys

Removed the hardcoded "hpq6001" as phys but uses ACPI HID instead.
Signed-off-by: Alex Hung <alexhung@gmail.com>
Link: https://lore.kernel.org/r/20221127004617.722553-1-alex.hung@amd.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/wireless-hotkey.c

@@ -20,7 +20,10 @@ MODULE_ALIAS("acpi*:HPQ6001:*");
 MODULE_ALIAS("acpi*:WSTADEF:*");
 MODULE_ALIAS("acpi*:AMDI0051:*");
 
-static struct input_dev *wl_input_dev;
+struct wl_button {
+	struct input_dev *input_dev;
+	char phys[32];
+};
 
 static const struct acpi_device_id wl_ids[] = {
 	{"HPQ6001", 0},
@@ -29,63 +32,80 @@ static const struct acpi_device_id wl_ids[] = {
 	{"", 0},
 };
 
-static int wireless_input_setup(void)
+static int wireless_input_setup(struct acpi_device *device)
 {
+	struct wl_button *button = acpi_driver_data(device);
 	int err;
 
-	wl_input_dev = input_allocate_device();
-	if (!wl_input_dev)
+	button->input_dev = input_allocate_device();
+	if (!button->input_dev)
 		return -ENOMEM;
 
-	wl_input_dev->name = "Wireless hotkeys";
-	wl_input_dev->phys = "hpq6001/input0";
-	wl_input_dev->id.bustype = BUS_HOST;
-	wl_input_dev->evbit[0] = BIT(EV_KEY);
-	set_bit(KEY_RFKILL, wl_input_dev->keybit);
+	snprintf(button->phys, sizeof(button->phys), "%s/input0", acpi_device_hid(device));
+
+	button->input_dev->name = "Wireless hotkeys";
+	button->input_dev->phys = button->phys;
+	button->input_dev->id.bustype = BUS_HOST;
+	button->input_dev->evbit[0] = BIT(EV_KEY);
+	set_bit(KEY_RFKILL, button->input_dev->keybit);
 
-	err = input_register_device(wl_input_dev);
+	err = input_register_device(button->input_dev);
 	if (err)
 		goto err_free_dev;
 
 	return 0;
 
 err_free_dev:
-	input_free_device(wl_input_dev);
+	input_free_device(button->input_dev);
 	return err;
 }
 
-static void wireless_input_destroy(void)
+static void wireless_input_destroy(struct acpi_device *device)
 {
-	input_unregister_device(wl_input_dev);
+	struct wl_button *button = acpi_driver_data(device);
+
+	input_unregister_device(button->input_dev);
+	kfree(button);
 }
 
 static void wl_notify(struct acpi_device *acpi_dev, u32 event)
 {
+	struct wl_button *button = acpi_driver_data(acpi_dev);
+
 	if (event != 0x80) {
 		pr_info("Received unknown event (0x%x)\n", event);
 		return;
 	}
 
-	input_report_key(wl_input_dev, KEY_RFKILL, 1);
-	input_sync(wl_input_dev);
-	input_report_key(wl_input_dev, KEY_RFKILL, 0);
-	input_sync(wl_input_dev);
+	input_report_key(button->input_dev, KEY_RFKILL, 1);
+	input_sync(button->input_dev);
+	input_report_key(button->input_dev, KEY_RFKILL, 0);
+	input_sync(button->input_dev);
 }
 
 static int wl_add(struct acpi_device *device)
 {
+	struct wl_button *button;
 	int err;
 
-	err = wireless_input_setup();
-	if (err)
+	button = kzalloc(sizeof(struct wl_button), GFP_KERNEL);
+	if (!button)
+		return -ENOMEM;
+
+	device->driver_data = button;
+
+	err = wireless_input_setup(device);
+	if (err) {
 		pr_err("Failed to setup wireless hotkeys\n");
+		kfree(button);
+	}
 
 	return err;
 }
 
 static int wl_remove(struct acpi_device *device)
 {
-	wireless_input_destroy();
+	wireless_input_destroy(device);
 	return 0;
 }