ACPI: Add acpi_bus_attach_private_data() to facilitate to attach data to ACPI handle

There is already acpi_bus_get_private_data() to get ACPI handle data
which is associated with acpi_bus_private_data_handler(). This patch
is to add acpi_bus_attach_private_data() to make a pair and facilitate
to attach and get data to/from ACPI handle.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPI/Thermal: Use acpi_bus_attach_private_data() to attach private data

Use acpi_bus_attach_private_data() to attach private data
instead of acpi_attach_data().

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I2C: Add smbus quick read/write helper function

Add i2c_smbus_quick_write/read() helper function. These will be used
in the implementation of i2c ACPI address space handler.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I2C: Add smbus word/block process call helper function

Add i2c_smbus_word/block_proc_call() helper function. These will be used
in the implementation of i2c ACPI address space handler.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I2C / ACPI: Add i2c ACPI operation region support

ACPI 5.0 spec(5.5.2.4.5) defines GenericSerialBus(i2c, spi, uart) operation region.
It allows ACPI aml code able to access such kind of devices to implement
some ACPI standard method.

ACPI Spec defines some access attribute to associate with i2c protocol.
AttribQuick 	       	       		Read/Write Quick Protocol
AttribSendReceive			Send/Receive Byte Protocol
AttribByte 			 	Read/Write Byte Protocol
AttribWord				Read/Write Word Protocol
AttribBlock				Read/Write Block Protocol
AttribBytes				Read/Write N-Bytes Protocol
AttribProcessCall			Process Call Protocol
AttribBlockProcessCall			Write Block-Read Block Process Call Protocol
AttribRawBytes 				Raw Read/Write N-BytesProtocol
AttribRawProcessBytes			Raw Process Call Protocol

On the Asus T100TA, Bios use GenericSerialBus operation region to access
i2c device to get battery info.

Sample code From Asus T100TA

    Scope (_SB.I2C1)
    {
        Name (UMPC, ResourceTemplate ()
        {
            I2cSerialBus (0x0066, ControllerInitiated, 0x00061A80,
                AddressingMode7Bit, "\\_SB.I2C1",
                0x00, ResourceConsumer, ,
                )
        })

	...

        OperationRegion (DVUM, GenericSerialBus, Zero, 0x0100)
        Field (DVUM, BufferAcc, NoLock, Preserve)
        {
            Connection (UMPC),
            Offset (0x81),
            AccessAs (BufferAcc, AttribBytes (0x3E)),
            FGC0,   8
        }
	...
     }

     Device (BATC)
     {
         Name (_HID, EisaId ("PNP0C0A"))  // _HID: Hardware ID
         Name (_UID, One)  // _UID: Unique ID
	 ...

            Method (_BST, 0, NotSerialized)  // _BST: Battery Status
            {
                If (LEqual (AVBL, One))
                {
                    Store (FGC0, BFFG)
                    If (LNotEqual (STAT, One))
                    {
                        ShiftRight (CHST, 0x04, Local0)
                        And (Local0, 0x03, Local0)
                        If (LOr (LEqual (Local0, One), LEqual (Local0, 0x02)))
                        {
                            Store (0x02, Local1)
                        }
	...

    }

The i2c operation region is defined under I2C1 scope. _BST method under
battery device BATC read battery status from the field "FCG0". The request
would be sent to i2c operation region handler.

This patch is to add i2c ACPI operation region support. Due to there are
only "Byte" and "Bytes" protocol access on the Asus T100TA, other protocols
have not been tested.

About RawBytes and RawProcessBytes protocol, they needs specific drivers to interpret
reference data from AML code according ACPI 5.0 SPEC(5.5.2.4.5.3.9 and 5.5.2.4.5.3.10).
So far, not found such case and will add when find real case.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I2C / ACPI: Move ACPI related code to i2c-acpi.c

Clean up ACPI related code in the i2c core.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
I2C / ACPI: Add CONFIG_I2C_ACPI config

This patch is to add CONFIG_I2C_ACPI. Current there is a race between
removing I2C ACPI operation region and ACPI AML code accessing.
So make i2c core built-in if CONFIG_I2C_ACPI is set.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses.

We need to find a smarter way to switch to 64-bit FADT addresses according
to the bug report.  This patch reverts Linux to the original behavior.

Fixes: 0249ed2444d6 (ACPICA: Add option to favor 32-bit FADT addresses.)
References: https://bugzilla.kernel.org/show_bug.cgi?id=74021
Reported-and-tested-by: Oswald Buddenhagen <ossi@kde.org>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Merge back earlier ACPICA material.

Conflicts:
	drivers/acpi/acpica/acglobal.h
Merge branches 'acpi-tpm', 'acpi-proc' and 'acpica' into linux-next

* acpi-tpm:
  ACPI / TPM: Fix resume regression on Chromebooks

* acpi-proc:
  ACPI / proc: Do not say when /proc interfaces will be deleted in Kconfig

* acpica:
  ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses.
Merge branch 'pm-cpufreq' into linux-next

* pm-cpufreq:
  intel_pstate: remove setting P state to MAX on init
  intel_pstate: Set turbo VID for BayTrail
Merge branches 'acpi-video-next' and 'acpi-pm' into linux-next

* acpi-video-next:
  ACPI / video: change acpi-video brightness_switch_enabled default to 0

* acpi-pm:
  ACPI / PM: Export acpi_target_system_state() to modules
Merge branches 'acpi-tools' and 'pm-tools' into linux-next

* acpi-tools:
  ACPI / tools: Introduce ec_access.c - tool to access the EC

* pm-tools:
  PM / tools: cpupower: add option to display values without round offs
  tools / power: turbostat: Drop temperature checks
Merge branch 'pm-cpuidle' into linux-next

* pm-cpuidle:
  PM / suspend: Always use deepest C-state in the "freeze" sleep state
  cpuidle / menu: move repeated correction factor check to init
  cpuidle / menu: Return (-1) if there are no suitable states
  cpuidle: Combine cpuidle_enabled() with cpuidle_select()
Merge branch 'pm-cpufreq-next' into linux-next

* pm-cpufreq-next:
  intel_pstate: Add CPU IDs for Broadwell processors
  cpufreq: Fix build error on some platforms that use cpufreq_for_each_*
  PM / OPP: Move cpufreq specific OPP functions out of generic OPP library
  PM / OPP: Remove cpufreq wrapper dependency on internal data organization
  cpufreq: Catch double invocations of cpufreq_freq_transition_begin/end
  intel_pstate: Remove sample parameter in intel_pstate_calc_busy
  cpufreq: Kconfig: Fix spelling errors
  cpufreq: Make linux-pm@vger.kernel.org official mailing list
  cpufreq: exynos: Use dev_err/info function instead of pr_err/info
  sh: clk: Use cpufreq_for_each_valid_entry macro for iteration
  irda: sh_sir: Use cpufreq_for_each_valid_entry macro for iteration
  thermal: cpu_cooling: Use cpufreq_for_each_valid_entry macro for iteration
  mips: lemote 2f: Use cpufreq_for_each_entry macro for iteration
  mfd: db8500-prcmu: Use cpufreq_for_each_entry macro for iteration
  ARM: davinci: da850: Use cpufreq_for_each_entry macro for iteration
  cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
  cpufreq: Introduce macros for cpufreq_frequency_table iteration
Merge branches 'pm-sleep', 'powercap' and 'pnp' into linux-next

* pm-sleep:
  PM / hibernate: convert simple_strtoul to kstrtoul
  PM / hibernate: Documentation: Fix script for unswapping
  PM / hibernate: no kernel_power_off when pm_power_off NULL
  PM / hibernate: use unsigned local variables in swsusp_show_speed()

* powercap:
  powercap / RAPL: add new CPU IDs
  powercap / RAPL: further relax energy counter checks

* pnp:
  PNP / resources: remove positive test on unsigned values
Merge branch 'acpica-tmp' into bleeding-edge

* acpica-tmp: (54 commits)
  ACPICA: Update version to 20140424.
  ACPICA: Comment/format update, no functional change.
  ACPICA: Events: Update GPE handling and initialization code.
  ACPICA: Remove extraneous error message for large number of GPEs.
  ACPICA: Tables: Remove old mechanism to validate if XSDT contains NULL entries.
  ACPICA: Tables: Add new mechanism to skip NULL entries in RSDT and XSDT.
  ACPICA: acpidump: Add support to force using RSDT.
  ACPICA: Back port of improvements on exception code.
  ACPICA: Back port of _PRP update.
  ACPICA: acpidump: Fix truncated RSDP signature validation.
  ACPICA: Linux header: Add support for stubbed externals.
  ACPICA: OSL: Add configurability for generic external functions.
  ACPICA: OSL: Add section to collect the divergence in acpixf.h.
  ACPICA: OSL: Add configurability for debug output functions.
  ACPICA: OSL: Add configurability for error message functions.
  ACPICA: OSL: Add configurability for memory allocation macros.
  ACPICA: OSL: Move external globals from utglobal.c to acpixf.h using ACPI_INIT_GLOBAL/ACPI_GLOBAL.
  ACPICA: Comment updates - no functional change.
  ACPICA: Update handling of PCI ID lists.
  ACPICA: Add support for _LPD and _PRP methods.
  ...
Merge branch 'i2c-acpi' into bleeding-edge

* i2c-acpi:
  I2C / ACPI: Add CONFIG_I2C_ACPI config
  I2C / ACPI: Move ACPI related code to i2c-acpi.c
  I2C / ACPI: Add i2c ACPI operation region support
  I2C: Add smbus word/block process call helper function
  I2C: Add smbus quick read/write helper function
  ACPI/Thermal: Use acpi_bus_attach_private_data() to attach private data
  ACPI: Add acpi_bus_attach_private_data() to facilitate to attach data to ACPI handle