lib: psci: early suspend handler for platforms
This patch adds an early suspend handler, that executes with
SMP and data cache enabled. This handler allows platforms to
perform any early actions during the CPU suspend entry sequence.
This handler is optional and platforms can choose to implement it
depending on their needs. The `pwr_domain_suspend` handler still
exists and platforms can keep on using it without any side effects.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/docs/platform-migration-guide.rst b/docs/platform-migration-guide.rst
index 5e8eeba..638033e 100644
--- a/docs/platform-migration-guide.rst
+++ b/docs/platform-migration-guide.rst
@@ -146,6 +146,7 @@
void (*cpu_standby)(plat_local_state_t cpu_state);
int (*pwr_domain_on)(u_register_t mpidr);
void (*pwr_domain_off)(const psci_power_state_t *target_state);
+ void (*pwr_domain_suspend_early)(const psci_power_state_t *target_state);
void (*pwr_domain_suspend)(const psci_power_state_t *target_state);
void (*pwr_domain_on_finish)(const psci_power_state_t *target_state);
void (*pwr_domain_suspend_finish)(
@@ -170,12 +171,12 @@
passed in a PSCI ``CPU_SUSPEND`` to the ``psci_power_state`` format. This handler
is now mandatory for PSCI ``CPU_SUSPEND`` support.
-The ``plat_psci_ops`` handlers, ``pwr_domain_off`` and ``pwr_domain_suspend``, are
-passed the target local state for each affected power domain. The platform
-must execute operations specific to these target states. Similarly,
-``pwr_domain_on_finish`` and ``pwr_domain_suspend_finish`` are passed the local
-states of the affected power domains before wakeup. The platform
-must execute actions to restore these power domains from these specific
+The ``plat_psci_ops`` handlers, ``pwr_domain_off``, ``pwr_domain_suspend_early``
+and ``pwr_domain_suspend``, are passed the target local state for each affected
+power domain. The platform must execute operations specific to these target
+states. Similarly, ``pwr_domain_on_finish`` and ``pwr_domain_suspend_finish``
+are passed the local states of the affected power domains before wakeup. The
+platform must execute actions to restore these power domains from these specific
local states.
- Difference in invocation