Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 4 deletions

diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index bc65ebfcdf..90c3d2eab9 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -428,7 +428,7 @@ bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
 }
 EXPORT_SYMBOL_GPL(acpi_quirk_skip_i2c_client_enumeration);
 
-int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
+static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
 {
 	struct acpi_device *adev = ACPI_COMPANION(controller_parent);
 	const struct dmi_system_id *dmi_id;
@@ -436,8 +436,6 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s
 	u64 uid;
 	int ret;
 
-	*skip = false;
-
 	ret = acpi_dev_uid_to_integer(adev, &uid);
 	if (ret)
 		return 0;
@@ -463,7 +461,6 @@ int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *s
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);
 
 bool acpi_quirk_skip_gpio_event_handlers(void)
 {
@@ -478,8 +475,41 @@ bool acpi_quirk_skip_gpio_event_handlers(void)
 	return (quirks & ACPI_QUIRK_SKIP_GPIO_EVENT_HANDLERS);
 }
 EXPORT_SYMBOL_GPL(acpi_quirk_skip_gpio_event_handlers);
+#else
+static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
+{
+	return 0;
+}
 #endif
 
+int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
+{
+	struct acpi_device *adev = ACPI_COMPANION(controller_parent);
+
+	*skip = false;
+
+	/*
+	 * The DELL0501 ACPI HID represents an UART (CID is set to PNP0501) with
+	 * a backlight-controller attached. There is no separate ACPI device with
+	 * an UartSerialBusV2() resource to model the backlight-controller.
+	 * Set skip to true so that the tty core creates a serdev ctrl device.
+	 * The backlight driver will manually create the serdev client device.
+	 */
+	if (acpi_dev_hid_match(adev, "DELL0501")) {
+		*skip = true;
+		/*
+		 * Create a platform dev for dell-uart-backlight to bind to.
+		 * This is a static device, so no need to store the result.
+		 */
+		platform_device_register_simple("dell-uart-backlight", PLATFORM_DEVID_NONE,
+						NULL, 0);
+		return 0;
+	}
+
+	return acpi_dmi_skip_serdev_enumeration(controller_parent, skip);
+}
+EXPORT_SYMBOL_GPL(acpi_quirk_skip_serdev_enumeration);
+
 /* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
 static const struct {
 	const char *hid;