From 1a8f83515c1646e134163f0ab310362fae49fcca Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Tue, 11 Feb 2014 00:35:53 +0100
Subject: [PATCH] ACPI / LPSS: Support for device latency tolerance PM QoS

Add a new routine, acpi_lpss_set_ltr(), for setting latency tolerance
values for LPSS devices having LTR (Latency Tolerance Reporting)
registers.  Add .bind()/.unbind() callbacks to lpss_handler to set
the LPSS devices' power.set_latency_tolerance callback pointers to
acpi_lpss_set_ltr() during device addition and to clear them on
device removal, respectively.

That will cause the device latency tolerance PM QoS to work for
the devices in question as documented.

This changeset includes a fix from Mika Westerberg.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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