tree 39f95ee57dbe42e78945365e2b166161a24cc804
parent f08dbf8a61462aa122b9b5077849a3f4bd84702a
author Paul Burton <paul.burton@imgtec.com> 1397489129 +0100
committer Paul Burton <paul.burton@imgtec.com> 1401290436 +0100

cpuidle: cpuidle-cps: add MIPS CPS cpuidle driver

This patch adds a cpuidle driver for systems based around the MIPS
Coherent Processing System (CPS) architecture. It supports four idle
states:

  - The standard MIPS wait instruction.

  - The non-coherent wait, clock gated & power gated states exposed by
    the recently added pm-cps layer.

The pm-cps layer is used to enter all the deep idle states. Since cores
in the clock or power gated states cannot service interrupts, the
gic_send_ipi_single function is modified to send a power up command for
the appropriate core to the CPC in cases where the target CPU has marked
itself potentially incoherent.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>