imx8qxp: add support for cpuidle

This patch adds support for cpuidle with CPU powerdown,
there will be 3 idle states in Linux kernel:

1: wfi;
2: cpu power down;
3: cluster power down.

As Linux kernel needs a broadcast timer for waking up
CPU when whole CLUSTER is powerdown, GPT is adopted as
broadcast timer, and to make the clock & power management
easy for Linux kernel to avoid many workaround/hake in
Linux kernel, TF-A will handle GPT's power & clock management
as well as registers save/restore when suspend/resume.

Also, psci power states are used to determine CORE/CLUSTER/SYSTEM
power state to distinguish CPU idle and SYSTEM suspend which share
same domain_suspend callback.

The SoC IPs register mmap regions are merged into 1 large
section to cover all the SoC IPs register ranges TF-A needs,
this is to save mmap regions and make it simple.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

0 files changed, 0 insertions, 0 deletions