[Bug 197367] [psm][acpi] There no support Touchpad DELL Inspiron 17.3" 5000 series (DELL 5748)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197367

            Bug ID: 197367
           Summary: [psm][acpi] There no support Touchpad DELL Inspiron
                    17.3" 5000 series (DELL 5748)
           Product: Base System
           Version: 10.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: medda.mauro at gmail.com

FreeBSD 10.1 no detecs psm mouse on Dell Inspiron.
I seen that the problem was related to wrong I/O port allocation in ACPI DSDT.
PS2M has not port allocated in its CSR and mouse I/O port 0x66 is allocated by
PS2K resources.

I patched BIOS DSDT and fix problem loading custom AML code using the loader
tunables below:

acpi_dsdt_load="YES"
acpi_dsdt_name="/boot/dell_5748_deftunix.aml"

Booting FreeBSD in verbose mode in "/var/run/dmesg.boot" was entry:

psm0: unable to allocate IRQ

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