Wi-Fi on ASUS X75VD laptop does not work unless asus_nb_wmi module
is loaded with wapf=4 option. Add quirk for this.
Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Due to a recent fix in the firmware, the Punit verbosity control bits
now adhere to the correct pattern. Hence remove the workaround and
do a read-modify-write of the register.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
On the XPS 13 9350, the dell-rbtn mechanism has a new device id, and
the DSDT turns it off if a new enough _OSI is supported. Add a
comment about why we don't bother supporting it.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
The XPS 13 9350 sends WMI keypress events that aren't enumerated in
the DMI table. Add a table listing them. To avoid breaking things
that worked before, these un-enumerated hotkeys won't be used if the
DMI table maps them to something else.
FWIW, it appears that the DMI table may be a legacy thing and we
might want to rethink how we handle events in general. As an
example, a whole lot of things map to KEY_PROG3 via the DMI table.
This doesn't send keypress events for any of the new events. They
appear to all be handled by other means (keyboard illumination is
handled automatically and rfkill is handled by intel-hid).
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Checking the table for a minimum size of 7 bytes makes no sense: any valid
hotkey table has a size that's a multiple of 4.
Clean this up: replace the hardcoded header length with a sizeof and
change the check to ignore an empty hotkey table. The only behavior
change is that a 7-byte table (which is nonsensical) will now be
treated as absent instead of as valid but empty.
Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
dell-wmi and dell-laptop will compile but won't work right if DMI
isn't selected.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
[arnd: Use depends instead of selects to avoid recursive dependencies]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
The dmi_walk function maps the DMI table, walks it, and unmaps it.
This means that the dell_bios_hotkey_table that find_hk_type stores
points to unmapped memory by the time it gets read.
I've been able to trigger crashes caused by the stale pointer a
couple of times, but never on a stock kernel.
Fix it by generating the keymap in the dmi_walk callback instead of
storing a pointer.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As dell-laptop has been changed to use dell_smbios_find_token() instead
of directly accessing members of the da_tokens table, the latter can be
marked static.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As dell-laptop has been changed to use dell_smbios_find_token() instead
of find_token_id() and find_token_location(), these functions can be
safely removed.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Replace all uses of find_token_location() with dell_smbios_find_token()
to avoid directly accessing the da_tokens table.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Replace all uses of find_token_id() with dell_smbios_find_token() to
avoid directly accessing the da_tokens table.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Ultimately, the da_tokens table should not be exported from dell-smbios.
Currently, in some cases, dell-laptop accesses that table's members
directly, so implement a new function, dell_smbios_find_token(), which
returns a pointer to an entry inside the da_tokens table with the given
token ID (or NULL if it is not found).
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As dell-laptop has been changed to always retrieve a pointer to the
SMBIOS buffer using dell_smbios_get_buffer(), the SMBIOS buffer can be
marked static.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Ultimately, the SMBIOS buffer should not be exported from dell-smbios.
Currently, dell-laptop accesses it directly using a global variable, so
make dell_smbios_get_buffer() return a pointer to the SMBIOS buffer and
replace all uses of the global variable with local variables.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
An SMBIOS buffer pointer does not need to be returned by
dell_smbios_send_request(), because SMBIOS call results are stored in
the buffer exported by the module.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Passing an SMBIOS buffer pointer to dell_smbios_send_request() is
redundant as it should always operate on the SMBIOS buffer exported from
the module.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As dell_send_request() is exported from the module, its prefix should be
consistent with other exported symbols, so change function name to
dell_smbios_send_request().
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As release_buffer() is exported from the module, it has to be renamed to
something less generic, so add a "dell_smbios_" prefix to the function
name.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As clear_buffer() is exported from the module, it has to be renamed to
something less generic, so add a "dell_smbios_" prefix to the function
name.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
As get_buffer() is exported from the module, it has to be renamed to
something less generic, so add a "dell_smbios_" prefix to the function
name.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Extract SMBIOS-related code from dell-laptop to a new kernel module,
dell-smbios. The static specifier is removed from exported symbols,
otherwise code is just moved around.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
[dvhart: Include linux/io.h in dell-smbios.c as caught by lkp]
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Some laptop models have working hotkeys without the need of the driver
to activate them.
This patch adds a module parameter to tell the driver not to register
the hotkeys.
The new parameter is useful in DE less installations or where the DE
does not handle the hotkeys (see bug 99501).
Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This patch adds support to query and set the "Cooling Method" feature,
which basically changes how the system fan behaves, depending on the
supported cooling methods.
Depending on the laptop model, these are the (so far...) available
cooling methods:
- Maximum Performance
- Performance
- Battery Optimized
Signed-off-by: Azael Avalos <coproscefalo@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
"Unsupported brightness interface" message gets logged on
machines that are well supported.
Signed-off-by: Eric Curtin <ericcurtin17@gmail.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
gmux has 3 switch registers:
* GMUX_PORT_SWITCH_DISPLAY switches the panel
* GMUX_PORT_SWITCH_DDC switches the panel's DDC lines
(only on pre-retinas; on retinas this is a no-op)
* GMUX_PORT_SWITCH_EXTERNAL switches the external DP port(s)
(only on models without Thunderbolt, i.e. introduced before 2011;
those with Thunderbolt switch only HPD/AUX, not the main link)
Currently we switch all 3 registers in unison.
gmux does not preserve the switch state during suspend, so we currently
read GMUX_PORT_SWITCH_DISPLAY before suspend and restore all 3 registers
to this value on resume.
With the upcoming ->switch_ddc callback, GMUX_PORT_SWITCH_DDC may
temporarily contain a different value than the other 2 registers.
If we happen to suspend at this moment, we'll write an incorrect
value to GMUX_PORT_SWITCH_DDC on resume.
Also, on models with Thunderbolt the integrated GPU is unable to drive
the external DP port(s), so we want to keep GMUX_PORT_SWITCH_EXTERNAL
permanently switched to the discrete GPU on those machines.
Consequently we can no longer assume that GMUX_PORT_SWITCH_DISPLAY
represents the correct value for all 3 registers on suspend.
Track the state of all 3 registers: Add gmux_read_switch_state() and
gmux_write_switch_state(). Instead of reading the switch state on
every suspend, read it once on driver initialization so that we know
the current switch state all the time. (This allows us to use some
optimizations and shortcuts, e.g. we can skip switching DDC if we
know that it's already switched to the requested GPU.) Change the
->switchto callback to use gmux_write_switch_state().
Tested-by: Lukas Wunner <lukas@wunner.de>
[MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/5679f414cb0ddf1654dcc359571f3764b275edf0.1452525860.git.lukas@wunner.de
Allow handlers to declare their capabilities and allow clients to
obtain that information. So far we have these use cases:
* If the handler is able to switch DDC separately, clients need to
probe EDID with drm_get_edid_switcheroo(). We should allow them
to detect a capable handler to ensure this function only gets
called when needed.
* Likewise if the handler is unable to switch AUX separately, the active
client needs to communicate link training parameters to the inactive
client, which may then skip the AUX handshake and set up its output
with these pre-calibrated values (DisplayPort specification v1.1a,
section 2.5.3.3). Clients need a way to recognize such a situation.
The flags for the radeon_atpx_handler and amdgpu_atpx_handler are
initially set to 0, this can later on be amended with
handler_flags |= VGA_SWITCHEROO_CAN_SWITCH_DDC;
when a ->switch_ddc callback is added.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115
Tested-by: Lukas Wunner <lukas@wunner.de>
[MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/2b0d93ed6e511ca09e95e45e0b35627f330fabce.1452525860.git.lukas@wunner.de
These were some items that were pointed out in previous patches that
weren't caught be previous reviewers, but should be applied to other
parts of the driver as well.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
[dvhart: reverted a couple incorrect line wrapping changes]
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Both of these systems support:
* 2 lighting control zones
* HDMI mux control
* deep sleep control (to enable wakup from controller)
The ASM201 also supports the external graphics amplifier.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Allow for user configuration of BIOS settings that allow the system to be
turned on via HID devices.
The feature requires hardware architectural modifications and can not be
supported on existing systems.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
[dvhart: comment formatting and line length fixes]
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
The alienware graphics amplifier is a device that provides external access
to a full PCIe slot, USB hub, and additional control zone.
This patch enables support for reading status whether the cable is plugged
in as well as for setting the colors in the new zone on the amplifier.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
[dvhart: minor comment formatting fixes]
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
The X51-R3 is in the X51 family. It includes 3 internal
lighting zones as well as is the first AW desktop that
includes support for a graphics amplifier.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This brings them more in line with the usage of whitespace
in other platforms.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
"count" is controlled by the user and it can be negative. Let's prevent
that by making it unsigned. You have to have CAP_SYS_RAWIO to call this
function so the bug is not as serious as it could be.
Fixes: 5369c02d95 ('intel_scu_ipc: Utility driver for intel scu ipc')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
intel_hid_keymap contains a duplicate entry for KEY_HOME and an
incorrect HID index for KEY_PAGEDOWN
Reported-by: Pavel Bludov <pbludov@gmail.com>
Signed-off-by: Alex Hung <alex.hung@canonical.com>
This patch fixes compile time warnings when CONFIG_PM_SLEEP
is undefined. In this case sleep related counters are unused.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Pull more power management and ACPI updates from Rafael Wysocki:
"This includes fixes on top of the previous batch of PM+ACPI updates
and some new material as well.
From the new material perspective the most significant are the driver
core changes that should allow USB devices to stay suspended over
system suspend/resume cycles if they have been runtime-suspended
already beforehand. Apart from that, ACPICA is updated to upstream
revision 20160108 (cosmetic mostly, but including one fixup on top of
the previous ACPICA update) and there are some devfreq updates the
didn't make it before (due to timing).
A few recent regressions are fixed, most importantly in the cpuidle
menu governor and in the ACPI backlight driver and some x86 platform
drivers depending on it.
Some more bugs are fixed and cleanups are made on top of that.
Specifics:
- Modify the driver core and the USB subsystem to allow USB devices
to stay suspended over system suspend/resume cycles if they have
been runtime-suspended already beforehand and fix some bugs on top
of these changes (Tomeu Vizoso, Rafael Wysocki).
- Update ACPICA to upstream revision 20160108, including updates of
the ACPICA's copyright notices, a code fixup resulting from a
regression fix that was necessary in the upstream code only (the
regression fixed by it has never been present in Linux) and a
compiler warning fix (Bob Moore, Lv Zheng).
- Fix a recent regression in the cpuidle menu governor that broke it
on practically all architectures other than x86 and make a couple
of optimizations on top of that fix (Rafael Wysocki).
- Clean up the selection of cpuidle governors depending on whether or
not the kernel is configured for tickless systems (Jean Delvare).
- Revert a recent commit that introduced a regression in the ACPI
backlight driver, address the problem it attempted to fix in a
different way and revert one more cosmetic change depending on the
problematic commit (Hans de Goede).
- Add two more ACPI backlight quirks (Hans de Goede).
- Fix a few minor problems in the core devfreq code, clean it up a
bit and update the MAINTAINERS information related to it (Chanwoo
Choi, MyungJoo Ham).
- Improve an error message in the ACPI fan driver (Andy Lutomirski).
- Fix a recent build regression in the cpupower tool (Shreyas
Prabhu)"
* tag 'pm+acpi-4.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
cpuidle: menu: Avoid pointless checks in menu_select()
sched / idle: Drop default_idle_call() fallback from call_cpuidle()
cpupower: Fix build error in cpufreq-info
cpuidle: Don't enable all governors by default
cpuidle: Default to ladder governor on ticking systems
time: nohz: Expose tick_nohz_enabled
ACPICA: Update version to 20160108
ACPICA: Silence a -Wbad-function-cast warning when acpi_uintptr_t is 'uintptr_t'
ACPICA: Additional 2016 copyright changes
ACPICA: Reduce regression fix divergence from upstream ACPICA
ACPI / video: Add disable_backlight_sysfs_if quirk for the Toshiba Satellite R830
ACPI / video: Revert "thinkpad_acpi: Use acpi_video_handles_brightness_key_presses()"
ACPI / video: Document acpi_video_handles_brightness_key_presses() a bit
ACPI / video: Fix using an uninitialized mutex / list_head in acpi_video_handles_brightness_key_presses()
ACPI / video: Revert "ACPI / video: driver must be registered before checking for keypresses"
ACPI / fan: Improve acpi_device_update_power error message
ACPI / video: Add disable_backlight_sysfs_if quirk for the Toshiba Portege R700
cpuidle: menu: Fix menu_select() for CPUIDLE_DRIVER_STATE_START == 0
MAINTAINERS: Add devfreq-event entry
MAINTAINERS: Add missing git repository and directory for devfreq
...
Pull x86 platform driver updates from Darren Hart:
"Add intel punit and telemetry driver for APL SoCs.
Add intel-hid driver for various laptop hotkey support.
Add asus-wireless radio control driver.
Keyboard backlight support/improvements for ThinkPads, Vaio, and Toshiba.
Several hotkey related fixes and improvements for dell and toshiba.
Fix oops on dual GPU Macs in apple-gmux.
A few new device IDs and quirks.
Various minor config related build issues and cleanups.
surface pro 4:
- fix compare_const_fl.cocci warnings
- Add support for Surface Pro 4 Buttons
platform/x86:
- Add Intel Telemetry Debugfs interfaces
- Add Intel telemetry platform device
- Add Intel telemetry platform driver
- Add Intel Telemetry Core Driver
- add NULL check for input parameters
- add Intel P-Unit mailbox IPC driver
- update acpi resource structure for Punit
thinkpad_acpi:
- Add support for keyboard backlight
dell-wmi:
- Process only one event on devices with interface version 0
- Check if Dell WMI descriptor structure is valid
- Improve unknown hotkey handling
- Use a C99-style array for bios_to_linux_keycode
tc1100-wmi:
- fix build warning when CONFIG_PM not enabled
asus-wireless:
- Add ACPI HID ATK4001
- Add Asus Wireless Radio Control driver
asus-wmi:
- drop to_platform_driver macro
intel-hid:
- new hid event driver for hotkeys
sony-laptop:
- Keyboard backlight control for some Vaio Fit models
ideapad-laptop:
- Add Lenovo ideapad Y700-17ISK to no_hw_rfkill dmi list
apple-gmux:
- Assign apple_gmux_data before registering
toshiba_acpi:
- Add rfkill dependency to ACPI_TOSHIBA entry
- Fix keyboard backlight sysfs entries not being updated
- Add WWAN RFKill support
- Add support for WWAN devices
- Fix blank screen at boot if transflective backlight is supported
- Propagate the hotkey value via genetlink
toshiba_bluetooth:
- Add missing newline in toshiba_bluetooth_present function"
* tag 'platform-drivers-x86-v4.5-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (29 commits)
surface pro 4: fix compare_const_fl.cocci warnings
surface pro 4: Add support for Surface Pro 4 Buttons
platform:x86: Add Intel Telemetry Debugfs interfaces
platform:x86: Add Intel telemetry platform device
platform:x86: Add Intel telemetry platform driver
platform/x86: Add Intel Telemetry Core Driver
intel_punit_ipc: add NULL check for input parameters
thinkpad_acpi: Add support for keyboard backlight
dell-wmi: Process only one event on devices with interface version 0
dell-wmi: Check if Dell WMI descriptor structure is valid
tc1100-wmi: fix build warning when CONFIG_PM not enabled
asus-wireless: Add ACPI HID ATK4001
platform/x86: Add Asus Wireless Radio Control driver
asus-wmi: drop to_platform_driver macro
intel-hid: new hid event driver for hotkeys
Keyboard backlight control for some Vaio Fit models
platform/x86: Add rfkill dependency to ACPI_TOSHIBA entry
platform:x86: add Intel P-Unit mailbox IPC driver
intel_pmc_ipc: update acpi resource structure for Punit
ideapad-laptop: Add Lenovo ideapad Y700-17ISK to no_hw_rfkill dmi list
...
This implements debugfs interfaces for reading the telemetry
samples from SSRAM and configuring firmware trace verbosity.
Interface created under /sys/kernel/debug/telemetry
soc_states: SoC Device and Low Power States
pss_info: Info from the Primary SubSystem
ioss_info: Info from IO SubSusytem
pss_trace_verbosity: Read/Modify PSS F/W trace verbosity
ioss_trace_verbosity: Read/Modify IOSS F/W trace verbosity.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Telemetry Device is created by the pmc_ipc driver. Resources
are populated according SSRAM region as indicated by the BIOS tables.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Telemetry platform driver implements the telemetry interfaces.
Currently it supports ApolloLake. It uses the PUNIT and PMC IPC
interfaces to configure the telemetry samples to read.
The samples are read from a Secure SRAM region.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Intel PM Telemetry is a software mechanism via which various SoC
PM and performance related parameters like PM counters, firmware
trace verbosity, the status of different devices inside the SoC, etc.
can be monitored and analyzed. The different samples that may be
monitored can be configured at runtime via exported APIs.
This patch adds the telemetry core driver that implements basic
exported APIs.
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
intel_punit_ipc_command() maybe called when in or out
data pointers are NULL.
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This patch adds support for controlling keyboard backlight via standard
linux led class interface (::kbd_backlight). It uses ACPI HKEY device with
MLCG and MLCS methods.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Tested-by: Fabio D'Urso <fabiodurso@hotmail.it>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
