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feat(ti): add PSCI handlers for system suspend 

Add necessary K3 PSCI handlers to enable system suspend to be reported
in the PSCI capabilities when asked during OS boot.

Additionally, have the handlers provide information that all domains
should be off and also have the power domain suspend handler invoke the
TISCI_MSG_ENTER_SLEEP message to enter system suspend.

Change-Id: I351a16167770e9909e8ca525ee0d74fa93331194
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
This commit is contained in:
Dave Gerlach 2021-11-30 15:45:34 -06:00
parent b40a467783
commit 2393c27680
1 changed files with 39 additions and 0 deletions
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39
plat/ti/k3/common/k3_psci.c
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@ -234,11 +234,50 @@ static int k3_validate_ns_entrypoint(uintptr_t entrypoint)
return PSCI_E_SUCCESS;
}
#if K3_PM_SYSTEM_SUSPEND
static void k3_pwr_domain_suspend(const psci_power_state_t *target_state)
{
unsigned int core, proc_id;
core = plat_my_core_pos();
proc_id = PLAT_PROC_START_ID + core;
/* Prevent interrupts from spuriously waking up this cpu */
k3_gic_cpuif_disable();
k3_gic_save_context();
k3_pwr_domain_off(target_state);
ti_sci_enter_sleep(proc_id, 0, k3_sec_entrypoint);
}
static void k3_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
{
k3_gic_restore_context();
k3_gic_cpuif_enable();
}
static void k3_get_sys_suspend_power_state(psci_power_state_t *req_state)
{
unsigned int i;
/* CPU & cluster off, system in retention */
for (i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++) {
req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
}
}
#endif
static const plat_psci_ops_t k3_plat_psci_ops = {
.cpu_standby = k3_cpu_standby,
.pwr_domain_on = k3_pwr_domain_on,
.pwr_domain_off = k3_pwr_domain_off,
.pwr_domain_on_finish = k3_pwr_domain_on_finish,
#if K3_PM_SYSTEM_SUSPEND
.pwr_domain_suspend = k3_pwr_domain_suspend,
.pwr_domain_suspend_finish = k3_pwr_domain_suspend_finish,
.get_sys_suspend_power_state = k3_get_sys_suspend_power_state,
#endif
.system_off = k3_system_off,
.system_reset = k3_system_reset,
.validate_power_state = k3_validate_power_state,