On an AMD based Lenovo T14, I find that the module doesn't work at
all, and instead has a traceback with messages like:

```
sysfs: cannot create duplicate filename '/devices/virtual/firmware-attributes/thinklmi/attributes/Reserved'
```

Duplicate and reserved values showing up appear to be a firmware bug,
but they shouldn't make the driver explode.  So catch them and skip
them.

Fixes: a40cd7ef

 ("platform/x86: think-lmi: Add WMI interface support on Lenovo platforms")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20210622200755.12379-2-mario.limonciello@amd.com


[hdegoede@redhat.com: Add missing kfree(tlmi_priv.setting[i])]
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Commit 0ddcf3a6 ("platform/x86: think-lmi: Avoid potential read before
start of the buffer") moved the length == 0 up to before stripping the '\n'
which typically gets added when users echo a value to a sysfs-attribute
from the shell.

This avoids a potential buffer-underrun, but it also causes a behavioral
change, prior to this change "echo > kbdlang", iow writing just a single
'\n' would result in an EINVAL error, but after the change this gets
accepted setting kbdlang to an empty string.

Fix this by replacing the manual '\n' check with using strchrnul() to get
the length till '\n' or terminating 0 in one go; and then do the
length != 0 check after this.

Fixes: 0ddcf3a6

 ("platform/x86: think-lmi: Avoid potential read before start of the buffer")
Reported-by: Juha Leppänen <juha_efku@dnainternet.net>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210621193648.44138-1-hdegoede@redhat.com

Since we have started collecting Intel x86 specific drivers in their own
folder, move intel_cht_int33fe to its own subfolder there.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210618125516.53510-8-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Start collecting Intel x86 related drivers in its own subfolder.
Move intel_skl_int3472 first.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210618125516.53510-7-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

For the sake of APIs to be properly layered provide
skl_int3472_unregister_clock().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Daniel Scally <djrscally@gmail.com>
Tested-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210618125516.53510-6-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

For the sake of APIs to be properly layered provide
skl_int3472_unregister_regulator().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Daniel Scally <djrscally@gmail.com>
Tested-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210618125516.53510-5-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

When we call acpi_gpio_get_io_resource(), the output will be
the pointer to the ACPI GPIO resource. Use it directly instead of
dereferencing the generic resource.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Daniel Scally <djrscally@gmail.com>
Tested-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210618125516.53510-4-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Besides the fact that COMMON_CLK selects CLKDEV_LOOKUP, the latter
is going to be removed from clock framework.

Reviewed-by: Daniel Scally <djrscally@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210618125516.53510-3-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

We may free ACPI device resources immediately after use.
Refactor skl_int3472_parse_crs() accordingly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Daniel Scally <djrscally@gmail.com>
Tested-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210618125516.53510-2-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Linus already once did that for PDx86, don't repeat our mistakes.
TL;DR: 'n' *is* the default 'default'.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210618125516.53510-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Signed tag for the immutable devm-helpers branch for merging
into the extcon and pdx86 trees.

There is a problem in mapping CPU to a PCI device instance when the
bus numbers are reused in different packages. This was observed on
some Sapphire Rapids systems.

The current implementation reads bus number assigned to a CPU package
via MSR 0x128. This allows to establish relationship between a CPU
and a PCI device. This allows to update power related parameters to a
MMIO offset in a PCI device space which is unique to a CPU. But if
two packages uses same bus number then this mapping will not be unique.

When bus number is reused, PCI device will use different domain number
or segment number. So we need to be aware of this domain information
while matching CPU to PCI bus number. This domain information is not
available via any MSR. So need to use ACPI numa node information.

There is an interface already available in the Linux to read numa
node for a CPU and a PCI device. This change uses this interface
to check the numa node of a match PCI device with bus number.
If the bus number and numa node matches with the CPU's assigned
bus number and numa node, the matched PCI device instance will be
returned to the caller.

It is possible that before Sapphire Rapids, the numa node is not
defined for the Speed Select PCI device in some OEM systems. In this
case to restore old behavior, return the last matched PCI device
for domain 0 unlsess there are more than one matches.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20210616221329.1909276-2-srinivas.pandruvada@linux.intel.com


Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

It was observed that some of the high performance benchmarks are spending
more time in kernel depending on which CPU package they are executing.
The difference is significant and benchmark scores varies more than 10%.
These benchmarks adjust class of service to improve thread performance
which run in parallel. This class of service change causes access to
MMIO region of Intel Speed Select PCI devices depending on the CPU
package they are executing.

This mapping from CPU to PCI device instance uses a standard Linux PCI
interface "pci_get_domain_bus_and_slot()". This function does a linear
search to get to a PCI device. Since these platforms have 100+ PCI
devices, this search can be expensive in fast path for benchmarks.

Since the device and function of PCI device is fixed for Intel
Speed Select PCI devices, the CPU to PCI device information can be cached
at the same time when bus number for the CPU is read. In this way during
runtime the cached information can be used. This improves performance
of these benchmarks significantly.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20210616221329.1909276-1-srinivas.pandruvada@linux.intel.com


Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

This release adds following change:
- Fix reporting of memory frequency

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The uncore memory frequency value from the mailbox command
CONFIG_TDP_GET_MEM_FREQ needs to be scaled based on the platform for
display. There is no single constant multiplier.

This change introduces CPU model specific memory frequency multiplier.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Simplify driver by switching to use the resource managed IRQ
requesting and resource managed work-queue initialization.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/61190cc280a63baeb05ec570282bb3677bee8e7b.1623146580.git.matti.vaittinen@fi.rohmeurope.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

If reading MAX8997_MUIC_REG_STATUS1 fails at probe the driver exits
without freeing the requested IRQs.

Free the IRQs prior returning if reading the status fails.

Fixes: 3e34c819

 ("extcon: max8997: Avoid forcing UART path on drive probe")
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/27ee4a48ee775c3f8c9d90459c18b6f2b15edc76.1623146580.git.matti.vaittinen@fi.rohmeurope.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The extcon IRQ schedules a work item. IRQ is requested using devm while
WQ is cancelld at remove(). This mixing of devm and manual unwinding has
potential case where the WQ has been emptied (.remove() was ran) but
devm unwinding of IRQ was not yet done. It may be possible the IRQ is
triggered at this point scheduling new work item to the already flushed
queue.

According to the input documentation the input device allocated by
devm_input_allocate_device() does not need to be explicitly unregistered.
Use the new devm_work_autocancel() and remove the remove() to simplify the
code.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/cbe8205eed8276f6e6db5003cfe51b8b0d4ac966.1623146580.git.matti.vaittinen@fi.rohmeurope.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The extcon IRQ schedules a work item. IRQ is requested using devm while
WQ is cancelld at remove(). This mixing of devm and manual unwinding has
potential case where the WQ has been emptied (.remove() was ran) but
devm unwinding of IRQ was not yet done. It is possible the IRQ is triggered
at this point scheduling new work item to the already flushed queue.

Use new devm_work_autocancel() to remove the remove() and to kill the bug.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/ee8545f59ae3a93f0a70f640ecbd7e31cfadbcb9.1623146580.git.matti.vaittinen@fi.rohmeurope.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

A few drivers which need a work-queue must cancel work at driver detach.
Some of those implement remove() solely for this purpose. Help drivers to
avoid unnecessary remove and error-branch implementation by adding managed
verision of work initialization. This will also help drivers to avoid
mixing manual and devm based unwinding when other resources are handled by
devm.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/94ff4175e7f2ff134ed2fa7d6e7641005cc9784b.1623146580.git.matti.vaittinen@fi.rohmeurope.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

This driver only covered one scenario in which ACPI devices with _HID
INT3472 are found, and its functionality has been taken over by the
intel-skl-int3472 module, so remove it.

Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210603224007.120560-7-djrscally@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

ACPI devices with _HID INT3472 are currently matched to the tps68470
driver, however this does not cover all situations in which that _HID
occurs. We've encountered three possibilities:

1. On Chrome OS devices, an ACPI device with _HID INT3472 (representing
a physical TPS68470 device) that requires a GPIO and OpRegion driver
2. On devices designed for Windows, an ACPI device with _HID INT3472
(again representing a physical TPS68470 device) which requires GPIO,
Clock and Regulator drivers.
3. On other devices designed for Windows, an ACPI device with _HID
INT3472 which does **not** represent a physical TPS68470, and is instead
used as a dummy device to group some system GPIO lines which are meant
to be consumed by the sensor that is dependent on this entry.

This commit adds a new module, registering a platform driver to deal
with the 3rd scenario plus an i2c driver to deal with #1 and #2, by
querying the CLDB buffer found against INT3472 entries to determine
which is most appropriate.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20210603224007.120560-6-djrscally@gmail.com


[hdegoede@redhat.com Make skl_int3472_tps68470_calc_type() static]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

intel-gpio for v5.14-1

* Export two functions from GPIO ACPI for wider use
* Clean up Whiskey Cove and Crystal Cove GPIO drivers

The following is an automated git shortlog grouped by driver:

crystalcove:
 -  remove platform_set_drvdata() + cleanup probe

gpiolib:
 -  acpi: Add acpi_gpio_get_io_resource()
 -  acpi: Introduce acpi_get_and_request_gpiod() helper

wcove:
 -  Split error handling for CTRL and IRQ registers
 -  Unify style of to_reg() with to_ireg()
 -  Use IRQ hardware number getter instead of direct access

Signed tag for the immutable platform-drivers-x86-goodix branch for merging into the input subsystem.

We have moved to libera.chat. Update the link accordingly.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210614194635.1681519-1-luzmaximilian@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Link: https://lore.kernel.org/r/1623811809-65099-1-git-send-email-zou_wei@huawei.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

If length equals 0 then reading buf[length-1] will read before the start
of the buffer.

Avoid this by moving the length == 0 check up.

Cc: Mark Pearson <markpearson@lenovo.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210609151752.156902-2-hdegoede@redhat.com

tlmi_priv.pwd_admin->password is an array (not a pointer), so the correct
way to check for the password being set is to check for
tlmi_priv.pwd_admin->password[0] != 0.

For the second check, replace the check with checking that auth_str is
set instead.

Cc: Mark Pearson <markpearson@lenovo.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1505158 ("NO_EFFECT")
Fixes: a7314b3b1d8a ("platform/x86: think-lmi: Add WMI interface support on Lenovo platforms")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210609151752.156902-1-hdegoede@redhat.com

The dell-wmi-sysman and think-lmi kernel modules both have a global
struct class *fw_attr_class variable, leading to the following compile
errors when both are builtin:

ld: drivers/platform/x86/think-lmi.o:(.bss+0x0): multiple definition of `fw_attr_class'; drivers/platform/x86/dell/dell-wmi-sysman/sysman.o:(.bss+0x0): first defined here

In both cases the variable is only used in the file where it is declared.
Make both declarations static to avoid the linker error.

Cc: Mark Pearson <markpearson@lenovo.com>
Cc: Dell.Client.Kernel@dell.com
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210609145952.113393-1-hdegoede@redhat.com

drivers/platform/x86/intel_ips.c:832:6: warning: variable ‘ret’ set but
not used [-Wunused-but-set-variable]
  832 |  u16 ret;
      |      ^~~

Fix it by mark ret as '__maybe_unused'.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Link: https://lore.kernel.org/r/20210607014702.2981097-1-yangerkun@huawei.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The only use of base_attr_group and hubless_base_attr_group is to pass
their addresses to sysfs_create_group() and sysfs_remove_group(), both
which takes pointers to const attribute_group structs. Make them const
to allow the compiler to put them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Justin Ernst <justin.ernst@hpe.com>
Link: https://lore.kernel.org/r/20210605203807.60547-5-rikard.falkeborn@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The only use of tc1100_attribute_group is to pass its address to
sysfs_create_group() and sysfs_remove_group(), both which takes pointer
to const attribute_group structs. Make it const to allow the compiler to
put it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20210605203807.60547-4-rikard.falkeborn@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The only use of pmt_crashlog_group is to assign its address to the
attr_grp field in the intel_pmt_namespace struct, which is a pointer to
const attribute_group. Make it const to allow the compiler to put it in
read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20210605203807.60547-3-rikard.falkeborn@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The only use of hdaps_attribute_group is to pass its address to
sysfs_create_group() and sysfs_remove_group(), both which takes pointers
to const attribute_group structs. Make it const to allow the compiler to
put it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: Frank Seidel <frank@f-seidel.de>
Link: https://lore.kernel.org/r/20210605203807.60547-2-rikard.falkeborn@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/surface: aggregator: Use list_move_tail instead of list_del/list_add_tail in ssh_packet_layer.c

Using list_move_tail() instead of list_del() + list_add_tail() in ssh_packet_layer.c.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210609072448.1357524-1-libaokun1@huawei.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/surface: aggregator: Use list_move_tail instead of list_del/list_add_tail in ssh_request_layer.c

Using list_move_tail() instead of list_del() + list_add_tail() in ssh_request_layer.c.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210609072638.1358174-1-libaokun1@huawei.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The status variable in ssam_controller_event_disable() is always set, no
need to initialize it.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210604210907.25738-3-luzmaximilian@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

The status variable in ssam_nf_refcount_disable_free() is only set when
the reference count equals zero. Otherwise, it is returned
uninitialized. Fix this by always initializing status to zero.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 640ee17199e4 ("platform/surface: aggregator: Allow enabling of events without notifiers")
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20210604210907.25738-2-luzmaximilian@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Update the controller-device user-space interface (cdev) documentation
for the newly introduced IOCTLs and event interface.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210604134755.535590-8-luzmaximilian@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>