Public bug reported:

=== SRU Justification ===
[Impact] 
Touchpad on Precision M5530 uses PS/2 instead of I2C as its transport.

[Test Case]
The touchpad binds to psmouse instead of i2c_hid.
With the patch, the touchpad uses i2c_hid instead.

[Fix]
LKML Link: https://lkml.org/lkml/2018/1/30/963
The de facto standard, Windows, parse its DSDT as a term list. The DSDT
table on Precision M5530 also designed that way, hence we should just
respect that.
Add a new quirk for this specific machine.
I'll backport the patch for stable releases once it's upstreamed.

[Regression Potential]
Low. This fix is limited to XPS 15 9570/Precision M5530. Also it's the
"correct" way to do for this machine.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: originate-from-1742898 somerville

** Tags added: originate-from-1742898 somerville

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https://bugs.launchpad.net/bugs/1746661

Title:
  [linux-oem] Use I2C transport for touchpad on Precision M5530

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  === SRU Justification ===
  [Impact] 
  Touchpad on Precision M5530 uses PS/2 instead of I2C as its transport.

  [Test Case]
  The touchpad binds to psmouse instead of i2c_hid.
  With the patch, the touchpad uses i2c_hid instead.

  [Fix]
  LKML Link: https://lkml.org/lkml/2018/1/30/963
  The de facto standard, Windows, parse its DSDT as a term list. The DSDT
  table on Precision M5530 also designed that way, hence we should just
  respect that.
  Add a new quirk for this specific machine.
  I'll backport the patch for stable releases once it's upstreamed.

  [Regression Potential]
  Low. This fix is limited to XPS 15 9570/Precision M5530. Also it's the
  "correct" way to do for this machine.

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