UBUNTU: SAUCE: mfd: intel-lpss: add quirk for Dell XPS 13 7390 2-in-1
BugLink: https://bugs.launchpad.net/bugs/1845584
The memory region intel-lpss-pci uses has been declared as
write-combining
[ 0.001728] 5 base
4000000000 mask
6000000000 write-combining
This leads to the system hangs up during booting up.
Tuowen Zhao(ztuowen@gmail.com) provides a diff patch for intel-lpss
driver to claim to use un-cacheable memory while calling
__devm_ioremap(), and it works well. But it haven't been accepted by
maintainer yet.
To avoid the potential impact on other machines, I add a quirk to list
the machines which has the write-combining area in MTRR which overlaps
with the address that intel-lpss uses, only the machines in the list
pass the DEVM_IOREMAP_UC to __devm_ioremap().
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203485
Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Acked-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Paolo Pisati <paolo.pisati@canonical.com>
Acked-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>