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Dell All In One (AIO) models released after 2017 use a backlight controller
board connected to an UART.
In DSDT this uart port will be defined as:
Name (_HID, "DELL0501")
Name (_CID, EisaId ("PNP0501")
Instead of having a separate ACPI device with an UartSerialBusV2() resource
to model the backlight-controller, which would be the standard way to do
this.
The acpi_quirk_skip_serdev_enumeration() has special handling for this
and it will make the serial port code create a serdev controller device
for the UART instead of a /dev/ttyS0 char-dev. It will also create
a dell-uart-backlight driver platform device for this driver to bind too.
This new kernel module contains 2 drivers for this:
1. A simple platform driver which creates the actual serdev device
(with the serdev controller device as parent)
2. A serdev driver for the created serdev device which exports
the backlight functionality uses a standard backlight class device.
Reported-by: Roman Bogoyev <roman@computercheck.com.au>
Tested-by: Roman Bogoyev <roman@computercheck.com.au>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Co-developed-by: AceLan Kao <acelan.kao@canonical.com>
Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240513144603.93874-2-hdegoede@redhat.com
26 lines
1020 B
Makefile
26 lines
1020 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for linux/drivers/platform/x86/dell
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# Dell x86 Platform-Specific Drivers
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#
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obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
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obj-$(CONFIG_DCDBAS) += dcdbas.o
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obj-$(CONFIG_DELL_LAPTOP) += dell-laptop.o
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obj-$(CONFIG_DELL_RBTN) += dell-rbtn.o
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obj-$(CONFIG_DELL_RBU) += dell_rbu.o
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obj-$(CONFIG_DELL_SMBIOS) += dell-smbios.o
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dell-smbios-objs := dell-smbios-base.o
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dell-smbios-$(CONFIG_DELL_SMBIOS_WMI) += dell-smbios-wmi.o
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dell-smbios-$(CONFIG_DELL_SMBIOS_SMM) += dell-smbios-smm.o
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obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o
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obj-$(CONFIG_DELL_UART_BACKLIGHT) += dell-uart-backlight.o
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obj-$(CONFIG_DELL_WMI) += dell-wmi.o
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dell-wmi-objs := dell-wmi-base.o
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dell-wmi-$(CONFIG_DELL_WMI_PRIVACY) += dell-wmi-privacy.o
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obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o
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obj-$(CONFIG_DELL_WMI_DESCRIPTOR) += dell-wmi-descriptor.o
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obj-$(CONFIG_DELL_WMI_DDV) += dell-wmi-ddv.o
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obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o
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obj-$(CONFIG_DELL_WMI_SYSMAN) += dell-wmi-sysman/
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