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platform: generic: Add system suspend test

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When the system-suspend-test property is present in the domain config
node as shown below, implement system suspend with a simple 5 second
delay followed by a WFI. This allows testing system suspend when the
low-level firmware doesn't support it.

  / {
    chosen {
      opensbi-domains {
          compatible = "opensbi,domain,config";
          system-suspend-test;
      };

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Andrew Jones
2023-02-27 11:31:06 +01:00
committed by Anup Patel
parent 37558dccbe
commit 5ccebf0a7e
4 changed files with 55 additions and 1 deletions
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4
docs/domain_support.md
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@ -126,6 +126,9 @@ The DT properties of a domain configuration DT node are as follows:
* **compatible** (Mandatory) - The compatible string of the domain
configuration. This DT property should have value *"opensbi,domain,config"*
* **system-suspend-test** (Optional) - When present, enable a system
suspend test implementation which simply waits five seconds and issues a WFI.
### Domain Memory Region Node
The domain memory region DT node describes details of a memory region and
@ -234,6 +237,7 @@ be done:
chosen {
opensbi-domains {
compatible = "opensbi,domain,config";
system-suspend-test;
tmem: tmem {
compatible = "opensbi,domain,memregion";