diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/x86/utils.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c index 8829a907eee0..90c3d2eab9e9 100644 --- a/drivers/acpi/x86/utils.c +++ b/drivers/acpi/x86/utils.c @@ -484,8 +484,28 @@ static int acpi_dmi_skip_serdev_enumeration(struct device *controller_parent, bo 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); |