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SubjectRe: OpRegion conflicts for Skylake LPSS
On Tue, Apr 26, 2016 at 02:44:13AM +0200, Ben Gamari wrote:
>
> While trying to troubleshoot some touchpad issues on a Dell Latitude
> E7470 (namely the touchpad being exposed only as a PS/2 device) I
> noticed that the intel-lpss driver (using a 4.6-rc4 kernel) fails to
> load with,
>
> ACPI Warning: SystemMemory range 0x00000000FE028000-0x00000000FE0281FF conflicts with OpRegion 0x00000000FE028000-0x00000000FE028207 (\_SB.PCI0.GEXP.BAR0) (20160108/utaddress-255)
> ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
> intel-lpss: probe of INT3446:00 failed with error -16
>
> The DSDT OpRegion in question looks like this,
>
> Scope (_SB.PCI0)
> {
> Device (GEXP)
> {
> Name (_ADR, One) // _ADR: Address
> Name (_STA, 0x0B) // _STA: Status
> OperationRegion (BAR0, SystemMemory, SB04, 0x0208)
> Field (BAR0, DWordAcc, NoLock, Preserve)
> {
> ICON, 32,
> TAR, 32,
> Offset (0x10),
> DATA, 32,
> HCNT, 32,
> LCNT, 32,
> Offset (0x2C),
> , 5,
> ABRT, 1,
> Offset (0x40),
> RBCK, 32,
> Offset (0x54),
> CLR, 32,
> Offset (0x6C),
> ENB, 1,
> Offset (0x70),
> ACTV, 1,
> TFNF, 1,
> , 1,
> RFNE, 1,
> Offset (0x7C),
> HOLD, 32,
> Offset (0x9C),
> ENSB, 1,
> Offset (0x204),
> RST, 32
> }
>
> It looks very much like these are describing the same device. Perhaps
> the lpss driver should be binding to this ACPI node? Or perhaps this is
> a firmware issue? Any guidance would be greatly appreciated.

Can you send me full acpidump of that machine?

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