linux-phytec-fsl

MLK15034: ARM: cpuidle imx7d: Extend imx_pen lock to cover entire flow

This makes the code much easier to reason about. In particular it o
makes sure the imx7d cpuidle driver respects the requirements for
cpu_cluster_pm_enter/exit:

* cpu_cluster_pm_enter must be called after cpu_pm_enter has been called
on all cpus in the power domain, and before cpu_pm_exit has been called
on any cpu in the power domain.
* cpu_cluster_pm_exit must be called after cpu_pm_enter has been called
on all cpus in the power domain, and before cpu_pm_exit has been called
on any cpu in the power domain.

This fixes interrupts sometimes getting "stuck" because of improper
save/restore of GIC DIST registers.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Anson Huang <Anson.Huang@nxp.com>