The INT33FE ACPI device has a CRS table with I2cSerialBusV2 resources for
3 devices: Maxim MAX17047 Fuel Gauge Controller, FUSB302 USB Type-C
Controller and PI3USB30532 USB switch.

This commit adds a driver for this ACPI device which instantiates
i2c-clients for these, so that the standard i2c drivers for these chips
can bind to the them.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Merge branch 'i2c/for-INT33FE' of
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
to prepare for an incoming INT33FE driver.
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

By default the i2c-core will try to get an irq with index 0 on ACPI / of
instantiated devices. This is troublesome on some ACPI systems where the
irq info at index 0 in the CRS table may contain nonsense and/or point
to an irqchip for which there is no Linux driver.

If this happens then before this commit the driver's probe method would
never get called because i2c_device_probe will try to get an irq by
calling acpi_dev_gpio_irq_get which will always return -EPROBE in this
case, as it waits for a matching irqchip driver to load. Thus causing
the driver to not get a chance to bind.

This commit adds a new disable_i2c_core_irq_mapping flag to struct
i2c_driver which a driver can set to tell the core to skip irq mapping.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

By default the i2c subsys creates an i2c-client for the first I2cSerialBus
resource of an acpi_device, but some acpi_devices have multiple
I2cSerialBus resources and we may want to instantiate i2c-clients for
the others.

This commit adds a new i2c_acpi_new_device function which can be used to
create an i2c-client for any I2cSerialBus resource of an acpi_device.

Note that the other resources may even be on a different i2c bus, so just
retrieving the client address is not enough.

Here is an example DSDT excerpt from such a device:

Device (WIDR)
{
    Name (_HID, "INT33FE" /* XPOWER Battery Device */)
    Name (_CID, "INT33FE" /* XPOWER Battery Device */)
    Name (_DDN, "WC PMIC Battery Device")
<snip>
    Name (RBUF, ResourceTemplate ()
    {
        I2cSerialBusV2 (0x005E, ControllerInitiated, 0x000186A0,
            AddressingMode7Bit, "\\_SB.PCI0.I2C7",
            0x00, ResourceConsumer, , Exclusive,
            )
        I2cSerialBusV2 (0x0036, ControllerInitiated, 0x000186A0,
            AddressingMode7Bit, "\\_SB.PCI0.I2C1",
            0x00, ResourceConsumer, , Exclusive,
            )
        I2cSerialBusV2 (0x0022, ControllerInitiated, 0x00061A80,
            AddressingMode7Bit, "\\_SB.PCI0.I2C1",
            0x00, ResourceConsumer, , Exclusive,
            )
        I2cSerialBusV2 (0x0054, ControllerInitiated, 0x00061A80,
            AddressingMode7Bit, "\\_SB.PCI0.I2C1",
            0x00, ResourceConsumer, , Exclusive,
            )
        GpioInt (Level, ActiveLow, Exclusive, PullNone, 0x0000,
            "\\_SB.PCI0.I2C7.PMI5", 0x00, ResourceConsumer, ,
            )
            {   // Pin list
        0x0012
            }
        GpioInt (Edge, ActiveLow, ExclusiveAndWake, PullNone, 0x0000,
            "\\_SB.GPO1", 0x00, ResourceConsumer, ,
            )
            {   // Pin list
        0x0005
            }
        GpioInt (Level, ActiveLow, Exclusive, PullNone, 0x0000,
            "\\_SB.PCI0.I2C7.PMI5", 0x00, ResourceConsumer, ,
            )
            {   // Pin list
        0x0013
            }
    })
    Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    {
        Return (RBUF) /* \_SB_.PCI0.I2C7.WIDR.RBUF */
    }
<snip>
}
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Modify struct i2c_acpi_lookup and i2c_acpi_fill_info() to allow
using them to get the info from a certain index in the ACPI-resource
list rather then taking the first I2cSerialBus resource.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

The current driver code is not checking for the error values returned by
'hp_wmi_dock_state()' and 'hp_wmi_tablet_state()' before passing the
returned values down to 'input_report_switch()'. This error code is
being translated to '1' in the input subsystem, reporting the wrong
status.

The biggest problem caused by this issue is that several laptops are
wrongly reported by the driver as docked, preventing them to be put to
sleep using the LID (and in most cases they are not even dockable).

With this patch we create the report switches only if we are able to
read the dock and tablet mode status correctly from ACPI.
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

hp_wmi_tablet_state() fails to return the correct error code when
hp_wmi_perform_query() returns the HP WMI query specific error code
that is a positive value.
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

The airplane mode button on Xiaomi's new laptops are the same as HP
laptops.

This is tested on Xiaomi Notebook Air 13.
Signed-off-by: Alex Hung <alex.hung@canonical.com>
[dvhart: Dropped module init/exit info messages]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Add touchscreen info for the Trekstor Surftab Wintron 7.0 ST70416-6
tablet.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

The dev field of struct fujitsu_bl is assigned in acpi_fujitsu_bl_add(),
but never used afterwards.  brightness_changed is set in get_lcd_level()
and then its value is only printed in a debug message, so it does not
influence execution flow.  Remove both fields as they are redundant.
Update the aforementioned debug message.  Adjust whitespace to make
checkpatch happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

The comment for the get_brightness backlight device callback in
include/linux/backlight.h states that it should "return the current
backlight brightness (accounting for power, fb_blank etc.)".
fujitsu-laptop violates that premise by simply returning the value to
which ACPI function GBLL evaluates to.  Make sure 0 is returned when
backlight power is turned off.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Any set_lcd_level() call can fail for one of two reasons: either
requested brightness is outside the allowed range or the ACPI method
used for setting brightness level is not available.  For
bl_update_status(), the first case is handled by backlight core, which
means bl_update_status() will not even be called if requested brightness
is outside the allowed range.  The second case will be logged anyway by
set_lcd_level() itself, so there is no point in generating another
message in bl_update_status().  Remove the superfluous debug message
along with a local variable that is now redundant.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Not all Fujitsu laptops support controlling backlight power through the
FUJ02E3 ACPI device.  Remove the debug message informing about a failed
attempt to set backlight power as it may be confusing and the return
value of call_fext_func() is logged anyway.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Due to the way the disable_brightness_adjust module parameter is
currently handled in acpi_fujitsu_bl_add(), it can only be set to either
0 or 1, which effectively makes it a boolean.  Emphasize that by
changing module parameter type to bool.  Do not announce parameter value
in a debug message as it can be dynamically changed via sysfs and its
current value can also be read from there.  Clean up module parameter
description.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

The value of each module parameter can be changed on the fly via sysfs.
However, the current way of handling use_alt_lcd_levels prevents the
user from dynamically switching from a value of 0 or 1 back to
autodetection as the latter is only performed upon ACPI device
instantiation.  Fix this by moving autodetection (in a simplified form)
to set_lcd_level() and changing module parameter type to int.  Do not
announce autodetection results in a debug message as current value of
use_alt_lcd_levels can simply be read from sysfs.  Clarify module
parameter description.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

When using brightness keys and backlight device's sysfs interface
alternately, an incorrect input event might be generated for a
brightness key press.  Consider the following sequence of events:

 1. Set backlight brightness to 6 using brightness keys.
 2. Write 4 to /sys/class/backlight/fujitsu-laptop/brightness.
 3. Press the "brightness up" key.

The input event generated in this scenario would be KEY_BRIGHTNESSDOWN,
because before step 3 brightness_level would still be at 6.  As the new
brightness level is established using GBLL, it would evaluate to 5
(SBLL/SBL2 sets it to 4 in step 2 and pressing the "brightness up" key
increases it by 1).  This in turn would cause acpi_fujitsu_bl_notify()
to observe a 6 -> 5 change, i.e. a decrease in brightness, while screen
brightness would in fact be increased.

Fix this by updating brightness_level in set_lcd_level.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

acpi_execute_simple_method() takes a method parameter which tells it to
look for the given method underneath the given handle, so calling
acpi_get_handle() beforehand is redundant.  Replace the call to
acpi_get_handle() with a call to acpi_execute_simple_method(), thus
eliminating the need for a local variable storing the handle.  Update
debug message to reflect this change.  Also do not assign a default
value to status as it has no influence on execution flow.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Depending on the value of the use_alt_lcd_levels module parameter, one
of two functions is used for setting LCD brightness level.  These
functions are almost identical and only differ in the name of the ACPI
method they call.  Instead of checking the value of use_alt_lcd_levels
at each call site, move that check to set_lcd_level() and get rid of
set_lcd_level_alt().
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Use a managed backlight device to get rid of acpi_fujitsu_bl_remove().
Change the parent of the backlight device from NULL to the FUJ02B1 ACPI
device as the latter is required for the backlight device to work.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

The backlight part of fujitsu-laptop is only used by laptops which are
incapable of using the standard ACPI video interface for handling
brightness changes.  Conversely, on laptops which are capable of using
the latter, no vendor-specific ACPI calls should be made unless
explicitly requested by the user.  Bail out immediately from
acpi_fujitsu_bl_add() unless using the vendor-specific interface was
either explicitly requested by the user or automatically selected by the
kernel.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Update debug message logged when the acpi_evaluate_integer() call inside
call_fext_func() fails so that it covers a broader set of possible
errors.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

A new call to SCU intel_scu_ipc_raw_command() writes SPTR and DPTR
registers before sending a command.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

For better maintainability and readability introduce a macro
for device ID table.

No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

The driver is bound to the devices based on their PCI IDs.

There is no need to do an additional check.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Device pointer is used as a flag that everything is prepared.
Nevertheless the assignment happened quite before and there is a window
when a caller can get weird results or even crashes since not all fields
are initialized yet.

Rearrange initialization sequence in ->probe() to prepare everything
before use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Fail ->probe() if there is no platform data supplied.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

There is no point in registering I2C bus notifier if DMI data does not
match.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[andy: updated due to previous patch changed]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

I2C bus has both i2c clients and adapter devices, so we must be careful in
notifier code and verify that we are actually dealing with an i2c client
before using it as such.

Fixes: cef9dd85 ("platform/x86: add support for devices with Silead...")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[andy: simplified silead_ts_dmi_add_props() change]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Asus laptop X302UA starts up with Wi-Fi disabled,
without a way to enable it. Set wapf=4 to fix the problem.
Signed-off-by: Santeri Toivonen <santeri.toivonen@vatsul.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Rename call_fext_func() arguments so that each argument's name signifies
its role:

  - cmd -> func: sub-function to call (flags, buttons etc.),
  - arg0 -> op: operation to perform (get, set, get capabilities etc.),
  - arg1 -> feature: feature to act on (e.g. which LED), if relevant,
  - arg2 -> state: state to set (e.g. LED on or off), if relevant.

Adjust whitespace to make checkpatch happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

acpi_evaluate_integer() takes a pathname parameter which contains the
name of the entity to evaluate underneath the given handle, so calling
acpi_get_handle() beforehand is redundant.  Replace the call to
acpi_get_handle() with a call to acpi_evaluate_integer(), thus
eliminating the need for a local variable storing the handle.  Adjust
whitespace to make checkpatch happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Set values of FUNC call parameters in a designated initializer.  Do not
initialize status and handle variables as the values these are
initialized to have no influence on execution flow.  Use an array
variable instead of the address of the first element of that array.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Remove the keycode[1-5] fields from struct fujitsu_bl as they are not
needed any more as a result of the sparse keymap migration.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Some laptop models need to have different keycodes assigned to hotkey
scancodes.  Change the sparse keymap upon a DMI match, before the hotkey
input device is setup.

Instead of using three different callbacks in the DMI match table,
simplify code by using the driver_data field of struct dmi_system_id to
supply the requested keymap to a common callback.  Also merge keymaps
for S6410 and S6420 as they are identical.

Rename fujitsu_dmi_table to fujitsu_laptop_dmi_table to emphasize it is
no longer used by the backlight part of fujitsu-laptop.  Adjust
whitespace to make checkpatch happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Simplify hotkey event generation by using a sparse keymap.  As sparse
keymap operates on scancodes instead of keycodes, adjust variable names
and debug messages accordingly.

This patch only handles the default keymap for clarity.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
[dvhart: correct flag passed to call_fext_func in acpi_fujitsu_laptop_notify]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Use a managed input device for hotkey events in order to simplify two
error paths and one cleanup function while also reducing the number of
local variables required.  Remove double assignment to make checkpatch
happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Simplify error handling in acpi_fujitsu_laptop_add() by moving code
responsible for setting up the input device to a separate function.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Simplify brightness key event generation by using a sparse keymap.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Use a managed input device for brightness events in order to simplify
two error paths and one cleanup function while also reducing the number
of local variables required.  Remove double assignment to make
checkpatch happy.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

Simplify error handling in acpi_fujitsu_bl_add() by moving code
responsible for setting up the input device to a separate function.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Reviewed-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>