virt: tegra: Add tegra_hv_pm_ctl driver

Added Nvidia Tegra hypervisor PM control to handle power state transition
commands over IVC channel.
Supported system shutdown/reboot initiation via sysfs.
Updated hyp_guest_reset hvc call interface.

STR-293
STR-294
STR-364
Jira VFND-4029
Jira HYP-77

Change-Id: I60274121de27495e5ae11ba34b02b65350496a9b
Signed-off-by: Jinyoung Park <jinyoungp@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1528042
GVS: Gerrit_Virtual_Submit
Reviewed-by: Abhijit . <abhijit@nvidia.com>
Tested-by: Sang-Hun Lee <sanlee@nvidia.com>
Reviewed-by: Sumeet Gupta <sumeetg@nvidia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/tegra_hv/tegra_hv_pm_ctl.txt b/Documentation/devicetree/bindings/tegra_hv/tegra_hv_pm_ctl.txt
new file mode 100644
index 000000000..1b59ffe8c
--- /dev/null
+++ b/Documentation/devicetree/bindings/tegra_hv/tegra_hv_pm_ctl.txt
@@ -0,0 +1,12 @@
+* Tegra Hypervisor PM control (tegra_hv_pm_ctl)
+
+Required properties:
+- compatible: Should be "nvidia,tegra-hv-pm-ctl".
+- ivc : IVC channel ID between Guest VM and Sysmgr.
+
+Example:
+        tegra_hv_pm_ctl {
+                compatible = "nvidia,tegra-hv-pm-ctl";
+                status = "okay";
+                ivc = <&tegra_hv 102>;
+        };