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Tegra: default platform handler for the CPU_STANDBY state 

This patch adds a default implementation for the platform specific
CPU standby power handler. Tegra SoCs can override this handler
with their own implementations.

Change-Id: I91e513842f194b1e2b1defa2d833bb4d9df5f06b
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
This commit is contained in:
Varun Wadekar 2017-12-27 18:10:12 -08:00
parent 28f45bb83c
commit 0887026ec1
2 changed files with 12 additions and 0 deletions
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11
plat/nvidia/tegra/common/tegra_pm.c
View File

@ -41,6 +41,7 @@ uint8_t tegra_fake_system_suspend;
* provide typical implementations that will be overridden by a SoC.
*/
#pragma weak tegra_soc_pwr_domain_suspend_pwrdown_early
#pragma weak tegra_soc_cpu_standby
#pragma weak tegra_soc_pwr_domain_suspend
#pragma weak tegra_soc_pwr_domain_on
#pragma weak tegra_soc_pwr_domain_off
@ -55,6 +56,12 @@ int32_t tegra_soc_pwr_domain_suspend_pwrdown_early(const psci_power_state_t *tar
return PSCI_E_NOT_SUPPORTED;
}
int32_t tegra_soc_cpu_standby(plat_local_state_t cpu_state)
{
(void)cpu_state;
return PSCI_E_SUCCESS;
}
int32_t tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state)
{
(void)target_state;
@ -141,6 +148,10 @@ void tegra_cpu_standby(plat_local_state_t cpu_state)
{
(void)cpu_state;
/* Tegra SoC specific handler */
if (tegra_soc_cpu_standby(cpu_state) != PSCI_E_SUCCESS)
ERROR("%s failed\n", __func__);
/*
* Enter standby state
* dsb is good practice before using wfi to enter low power states

1
plat/nvidia/tegra/include/tegra_private.h
View File

@ -97,6 +97,7 @@ extern uint8_t tegra_fake_system_suspend;
void tegra_pm_system_suspend_entry(void);
void tegra_pm_system_suspend_exit(void);
int32_t tegra_system_suspended(void);
int32_t tegra_soc_cpu_standby(plat_local_state_t cpu_state);
int32_t tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state);
int32_t tegra_soc_pwr_domain_on(u_register_t mpidr);
int32_t tegra_soc_pwr_domain_off(const psci_power_state_t *target_state);