[BugFix] Skylake intel-lpss fix

[XiongZhang]

Canonical found several I2C touchpad couldn't work on OEM SKL machines once they enable intel-lpss driver. This entry is used to track such fix made by Intel. So that these fix could enter into 16.04 release.

The following bugs are reported by Canonical for i2c touchpad failure.
[LP1496306] Monet][Redwood][dino2] touchpad doesn't work after Canonical back port LPSS patch set from 4.3 kernel into 15.04 kernel.
[LP 1505913] Re: [monet] touchpad doesn't work with Ubuntu kernel 3.19.0-29.31
[LP 1505914] [pandora] [vangogh] touchpad doesn't work with Ubuntu kernel 3.19.0-29.31
[LP 1505910] Re: [dino2] touchpad doesn't work with Ubuntu kernel 3.19.0-29.31
[LP 1505917] Re: [maple] touchpad doesn't work with Ubuntu kernel 3.19.0-29.31
[LP 1505919] Re: [iris] touchpad doesn't work with Ubuntu kernel 3.19.0-29.31

upstream schedule: 4.5

[XiongZhang (xiong-y-zhang)]

On some machines the touchpad itself failed when Linux i2c-hid driver fetched initial feature reports out of it. Looks like the corresponding Windows driver only fetches reports it needs and Intel suspect this is the only software used to validate the hardware.
When Intel follow what Windows driver does touchpads works fine. Intel push such fix into v4.4 kernel:
6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095 HID: multitouch: Fetch feature reports on demand for Win8 devices

However, it turns out that there are other issues as well. These are related to I2C host controller and are not limited to Dell laptops but instead there seem to be at least one Lenovo (Yoga 900) laptop where the same problem occurs. Intel sent the fix patches to community and the patches will be merged into v4.5 kernel.
https://lkml.org/lkml/2015/11/30/441

[XiongZhang (xiong-y-zhang)]

The fix patch is merged into v4.5 kernel
e3f9e29 device property: always check for fwnode type
61f5e29 device property: rename helper functions
318a197 device property: refactor built-in properties support
66586ba device property: keep single value inplace
a85f420 device property: helper macros for property entry creation
1d656fb device property: improve readability of macros
3c60f11 device property: return -EINVAL when property isn't found in ACPI
362c0b3 device property: Fallback to secondary fwnode if primary misses the prop
13141e1 device property: Take a copy of the property set
00bbc1d driver core: platform: Add support for built-in device properties
55f89a8 driver core: Do not overwrite secondary fwnode with NULL if it is set
4d215ca mfd: core: propagate device properties to sub devices drivers
e15ad21 mfd: intel-lpss: Add support for passing device properties
028af59 mfd: intel-lpss: Pass SDA hold time to I2C host controller driver
ec14c53 mfd: intel-lpss: Pass HSUART configuration via properties
4c5301a i2c: designware: Convert to use unified device property API

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-2.16

---------------
linux (4.4.0-2.16) xenial; urgency=low

  [ Andy Whitcroft ]

  * Release Tracking Bug
    - LP: #1539090
  * SAUCE: hv: hv_set_ifconfig -- convert to python3
    - LP: #1506521
  * SAUCE: dm: introduce a target_ioctl op to allow target specific ioctls
    - LP: #1538618

  [ Colin Ian King ]

  * SAUCE: ACPI / tables: Add acpi_force_32bit_fadt_addr option to force 32
    bit FADT addresses (LP: #1529381)
    - LP: #1529381

  [ John Johansen ]

  * SAUCE: (no-up): apparmor: fix for failed mediation of socket that is
    being shutdown
    - LP: #1446906

  [ Mahesh Salgaonkar ]

  * SAUCE: Powernv: Remove the usage of PACAR1 from opal wrappers
    - LP: #1537881
  * SAUCE: powerpc/book3s: Fix TB corruption in guest exit path on HMI
    interrupt.
    - LP: #1537881
  * SAUCE: KVM: PPC: Book3S HV: Fix soft lockups in KVM on HMI for time
    base errors
    - LP: #1537881

  [ Paolo Pisati ]

  * SAUCE: arm64: errata: Add -mpc-relative-literal-loads to erratum
    #843419 build flags
    - LP: #1533009
  * [Config] MFD_TPS65217=y && REGULATOR_TPS65217=y
  * [Config] disable ARCH_ZX (ZTE ZX Soc)

  [ Tim Gardner ]

  * Revert "SAUCE: (noup) cxlflash: a couple off by one bugs"
  * SAUCE: (no-up) Update bnx2x firmware to 7.12.30.0
    - LP: #1536719
  * SAUCE: drop obsolete bnx2x firmware
  * SAUCE: i40e: Silence 'may be used uninitialized' warnings
    - LP: #1536474
  * [Config] CONFIG_ZONE_DMA=y for amd64 lowlatency
    - LP: #1534647
  * [Config] Add pvpanic to virtual flavour
    - LP: #1537923
  * [Config] CONFIG_INTEL_PUNIT_IPC=m, CONFIG_INTEL_TELEMETRY=m
    - LP: #1520457

  [ Upstream Kernel Changes ]

  * i40evf: fix compiler warning of unused variable
    - LP: #1536474
  * intel: i40e: fix confused code
    - LP: #1536474
  * i40e/i40evf: remove unused tunnel parameter
    - LP: #1536474
  * i40e: Change BUG_ON to WARN_ON in service event complete
    - LP: #1536474
  * i40e: remove BUG_ON from feature string building
    - LP: #1536474
  * i40e: remove BUG_ON from FCoE setup
    - LP: #1536474
  * i40e: Workaround fix for mss < 256 issue
    - LP: #1536474
  * i40e/i40evf: Add a stat to track how many times we have to do a force
    WB
    - LP: #1536474
  * i40e: Move the saving of old link info from handle_link_event to
    link_event
    - LP: #1536474
  * i40e/i40evf: Add comment to #endif
    - LP: #1536474
  * i40e/i40evf: clean up error messages
    - LP: #1536474
  * i40evf: handle many MAC filters correctly
    - LP: #1536474
  * i40e: return the number of enabled queues for ETHTOOL_GRXRINGS
    - LP: #1536474
  * i40e: rework the functions to configure RSS with similar parameters
    - LP: #1536474
  * i40e: create a generic configure rss function
    - LP: #1536474
  * i40e: Bump version to 1.4.2
    - LP: #1536474
  * i40e: add new fields to store user configuration
    - LP: #1536474
  * i40e: rename rss_size to alloc_rss_size in i40e_pf
    - LP: #1536474
  * i40e/i40evf: Fix RS bit update in Tx path and disable force WB
    workaround
    - LP: #1536474
  * i40e/i40evf: prefetch skb data on transmit
    - LP: #1536474
  * i40evf: rename VF adapter s...