Pull i2c updates from Wolfram Sang:

 - core supports now bus regulators controlling power for SCL/SDA

 - quite some DT binding conversions to YAML

 - added a seperate DT binding for the optional SMBus Alert feature

 - documentation with examples how to deal with I2C sysfs files

 - some bigger rework for the i801 driver

 - and a few usual driver updates

* 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (42 commits)
  i2c: ali1535: mention that the device should not be disabled
  i2c: mpc: Restore reread of I2C status register
  i2c: core-smbus: Expose PEC calculate function for generic use
  Documentation: i2c: Add doc for I2C sysfs
  i2c: core: Disable client irq on reboot/shutdown
  dt-bindings: i2c: update bindings for MT8195 SoC
  i2c: imx: Fix some checkpatch warnings
  i2c: davinci: Simplify with dev_err_probe()
  i2c: cadence: Simplify with dev_err_probe()
  i2c: xiic: Simplify with dev_err_probe()
  i2c: cadence: Clear HOLD bit before xfer_size register rolls over
  dt-bindings: i2c: ce4100: Replace "ti,pcf8575" by "nxp,pcf8575"
  i2c: i801: Improve i801_setup_hstcfg
  i2c: i801: Use driver name constant instead of function dev_driver_string
  i2c: i801: Simplify initialization of i2c_board_info in i801_probe_optional_slaves
  i2c: i801: Improve status polling
  i2c: cht-wc: Replace of_node by NULL
  i2c: riic: Add RZ/G2L support
  dt-bindings: i2c: renesas,riic: Document RZ/G2L I2C controller
  dt-bindings: i2c: renesas,iic: Convert to json-schema
  ...

The comment from the i801 driver is valid here, too, so copy it.

Reported-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Prior to commit 1538d82f4647 ("i2c: mpc: Interrupt driven transfer") the
old interrupt handler would reread MPC_I2C_SR after checking the CSR_MIF
bit. When the driver was re-written this was removed as it seemed
unnecessary. However as it turns out this is necessary for i2c devices
which do clock stretching otherwise we end up thinking the bus is still
busy when processing the interrupt.

Fixes: 1538d82f4647 ("i2c: mpc: Interrupt driven transfer")
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Pull ACPI updates from Rafael Wysocki:
 "These update the ACPICA code in the kernel to the 20210604 upstream
  revision, add preliminary support for the Platform Runtime Mechanism
  (PRM), address issues related to the handling of device dependencies
  in the ACPI device eunmeration code, improve the tracking of ACPI
  power resource states, improve the ACPI support for suspend-to-idle on
  AMD systems, continue the unification of message printing in the ACPI
  code, address assorted issues and clean up the code in a number of
  places.

  Specifics:

   - Update ACPICA code in the kernel to upstrea revision 20210604
     including the following changes:

      - Add defines for the CXL Host Bridge Structureand and add the
        CFMWS structure definition to CEDT (Alison Schofield).
      - iASL: Finish support for the IVRS ACPI table (Bob Moore).
      - iASL: Add support for the SVKL table (Bob Moore).
      - iASL: Add full support for RGRT ACPI table (Bob Moore).
      - iASL: Add support for the BDAT ACPI table (Bob Moore).
      - iASL: add disassembler support for PRMT (Erik Kaneda).
      - Fix memory leak caused by _CID repair function (Erik Kaneda).
      - Add support for PlatformRtMechanism OpRegion (Erik Kaneda).
      - Add PRMT module header to facilitate parsing (Erik Kaneda).
      - Add _PLD panel positions (Fabian Wüthrich).
      - MADT: add Multiprocessor Wakeup Mailbox Structure and the SVKL
        table headers (Kuppuswamy Sathyanarayanan).
      - Use ACPI_FALLTHROUGH (Wei Ming Chen).

   - Add preliminary support for the Platform Runtime Mechanism (PRM) to
     allow the AML interpreter to call PRM functions (Erik Kaneda).

   - Address some issues related to the handling of device dependencies
     reported by _DEP in the ACPI device enumeration code and clean up
     some related pieces of it (Rafael Wysocki).

   - Improve the tracking of states of ACPI power resources (Rafael
     Wysocki).

   - Improve ACPI support for suspend-to-idle on AMD systems (Alex
     Deucher, Mario Limonciello, Pratik Vishwakarma).

   - Continue the unification and cleanup of message printing in the
     ACPI code (Hanjun Guo, Heiner Kallweit).

   - Fix possible buffer overrun issue with the description_show() sysfs
     attribute method (Krzysztof Wilczyński).

   - Improve the acpi_mask_gpe kernel command line parameter handling
     and clean up the core ACPI code related to sysfs (Andy Shevchenko,
     Baokun Li, Clayton Casciato).

   - Postpone bringing devices in the general ACPI PM domain to D0
     during resume from system-wide suspend until they are really needed
     (Dmitry Torokhov).

   - Make the ACPI processor driver fix up C-state latency if not
     ordered (Mario Limonciello).

   - Add support for identifying devices depening on the given one that
     are not its direct descendants with the help of _DEP (Daniel
     Scally).

   - Extend the checks related to ACPI IRQ overrides on x86 in order to
     avoid false-positives (Hui Wang).

   - Add battery DPTF participant for Intel SoCs (Sumeet Pawnikar).

   - Rearrange the ACPI fan driver and device power management code to
     use a common list of device IDs (Rafael Wysocki).

   - Fix clang CFI violation in the ACPI BGRT table parsing code and
     clean it up (Nathan Chancellor).

   - Add GPE-related quirks for some laptops to the EC driver (Chris
     Chiu, Zhang Rui).

   - Make the ACPI PPTT table parsing code populate the cache-id value
     if present in the firmware (James Morse).

   - Remove redundant clearing of context->ret.pointer from
     acpi_run_osc() (Hans de Goede).

   - Add missing acpi_put_table() in acpi_init_fpdt() (Jing Xiangfeng).

   - Make ACPI APEI handle ARM Processor Error CPER records like Memory
     Error ones to avoid user space task lockups (Xiaofei Tan).

   - Stop warning about disabled ACPI in APEI (Jon Hunter).

   - Fix fall-through warning for Clang in the SBSHC driver (Gustavo A.
     R. Silva).

   - Add custom DSDT file as Makefile prerequisite (Richard Fitzgerald).

   - Initialize local variable to avoid garbage being returned (Colin
     Ian King).

   - Simplify assorted pieces of code, address assorted coding style and
     documentation issues and comment typos (Baokun Li, Christophe
     JAILLET, Clayton Casciato, Liu Shixin, Shaokun Zhang, Wei Yongjun,
     Yang Li, Zhen Lei)"

* tag 'acpi-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (97 commits)
  ACPI: PM: postpone bringing devices to D0 unless we need them
  ACPI: tables: Add custom DSDT file as makefile prerequisite
  ACPI: bgrt: Use sysfs_emit
  ACPI: bgrt: Fix CFI violation
  ACPI: EC: trust DSDT GPE for certain HP laptop
  ACPI: scan: Simplify acpi_table_events_fn()
  ACPI: PM: Adjust behavior for field problems on AMD systems
  ACPI: PM: s2idle: Add support for new Microsoft UUID
  ACPI: PM: s2idle: Add support for multiple func mask
  ACPI: PM: s2idle: Refactor common code
  ACPI: PM: s2idle: Use correct revision id
  ACPI: sysfs: Remove tailing return statement in void function
  ACPI: sysfs: Use __ATTR_RO() and __ATTR_RW() macros
  ACPI: sysfs: Sort headers alphabetically
  ACPI: sysfs: Refactor param_get_trace_state() to drop dead code
  ACPI: sysfs: Unify pattern of memory allocations
  ACPI: sysfs: Allow bitmap list to be supplied to acpi_mask_gpe
  ACPI: sysfs: Make sparse happy about address space in use
  ACPI: scan: Fix race related to dropping dependencies
  ACPI: scan: Reorganize acpi_device_add()
  ...

* acpi-bus:
  ACPI: Remove redundant clearing of context->ret.pointer from acpi_run_osc()

* acpi-scan:
  ACPI: scan: Simplify acpi_table_events_fn()
  ACPI: scan: Fix race related to dropping dependencies
  ACPI: scan: Reorganize acpi_device_add()
  ACPI: scan: Fix device object rescan in acpi_scan_clear_dep()
  ACPI: scan: Make acpi_walk_dep_device_list()
  ACPI: scan: Rearrange acpi_dev_get_first_consumer_dev_cb()
  ACPI: scan: Define acpi_bus_put_acpi_device() as static inline
  ACPI: scan: initialize local variable to avoid garbage being returned
  ACPI: scan: Add function to fetch dependent of ACPI device
  ACPI: scan: Extend acpi_walk_dep_device_list()
  ACPI: scan: Rearrange dep_unmet initialization

* acpi-tables:
  ACPI: tables: Add custom DSDT file as makefile prerequisite
  ACPI: bgrt: Use sysfs_emit
  ACPI: bgrt: Fix CFI violation
  ACPI: tables: FPDT: Add missing acpi_put_table() in acpi_init_fpdt()
  ACPI: tables: PPTT: Populate cache-id if provided by firmware

Expose the PEC calculation i2c_smbus_pec() for generic use.

Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
Acked-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

The direction of the pipe argument must match the request-type direction
bit or control requests may fail depending on the host-controller-driver
implementation.

Control transfers without a data stage are treated as OUT requests by
the USB stack and should be using usb_sndctrlpipe(). Failing to do so
will now trigger a warning.

Fix the OSIFI2C_SET_BIT_RATE and OSIFI2C_STOP requests which erroneously
used the osif_usb_read() helper and set the IN direction bit.

Reported-by: syzbot+9d7dadd15b8819d73f41@syzkaller.appspotmail.com
Fixes: 83e53a8f120f ("i2c: Add bus driver for for OSIF USB i2c device.")
Cc: stable@vger.kernel.org      # 3.14
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

If an i2c client receives an interrupt during reboot or shutdown it may
be too late to service it by making an i2c transaction on the bus
because the i2c controller has already been shutdown. This can lead to
system hangs if the i2c controller tries to make a transfer that is
doomed to fail because the access to the i2c pins is already shut down,
or an iommu translation has been torn down so i2c controller register
access doesn't work.

Let's simply disable the irq if there isn't a shutdown callback for an
i2c client when there is an irq associated with the device. This will
make sure that irqs don't come in later than the time that we can handle
it. We don't do this if the i2c client device already has a shutdown
callback because presumably they're doing the right thing and quieting
the device so irqs don't come in after the shutdown callback returns.

Reported-by: kernel test robot <lkp@intel.com>
[swboyd@chromium.org: Dropped newline, added commit text, added
interrupt.h for robot build error]
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Fix the following warnings reported by checkpatch::
drivers/i2c/busses/i2c-imx.c:173: WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
drivers/i2c/busses/i2c-imx.c:175: WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
drivers/i2c/busses/i2c-imx.c:176: WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
drivers/i2c/busses/i2c-imx.c:177: WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
drivers/i2c/busses/i2c-imx.c:455: WARNING: Unnecessary ftrace-like logging - prefer using ftrace
drivers/i2c/busses/i2c-imx.c:602: WARNING: Unnecessary ftrace-like logging - prefer using ftrace
drivers/i2c/busses/i2c-imx.c:638: WARNING: Unnecessary ftrace-like logging - prefer using ftrace
drivers/i2c/busses/i2c-imx.c:1170: WARNING: Unnecessary ftrace-like logging - prefer using ftrace
drivers/i2c/busses/i2c-imx.c:1374: WARNING: Unnecessary ftrace-like logging - prefer using ftrace
drivers/i2c/busses/i2c-imx.c:1398: WARNING: Prefer strscpy over strlcpy - see: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/

Signed-off-by: Kwon Tae-young <tykwon@m2i.co.kr>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

Fix Sparse warnings:
drivers/i2c/i2c-dev.c:546:19: warning: incorrect type in assignment (different address spaces)
drivers/i2c/i2c-dev.c:549:53: warning: incorrect type in argument 2 (different address spaces)

compat_ptr() returns a pointer tagged __user which gets assigned to a
pointer missing the __user annotation. The same pointer is passed to
copy_from_user() as an argument where it is expected to have the __user
annotation. Fix both by adding the __user annotation to the pointer.

Fixes: 7d5cb45655f2 ("i2c compat ioctls: move to ->compat_ioctl()")
Signed-off-by: Andreas Hecht <andreas.e.hecht@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>