Tegra: PM: soc-specific system off handler
This patch introduces a power down handler which can be overriden
by SoCs to customise the power down process. The current SoCs do
not have a way of powering down the entire system as external PMIC
chips are involved in the process.
But future SoCs will have a way to power off the entire system
without talking to an external PMIC.
Change-Id: Ie7750714141a29cb0a1a616fafc531c4f11d0985
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
diff --git a/plat/nvidia/tegra/common/tegra_pm.c b/plat/nvidia/tegra/common/tegra_pm.c
index 8b7a059..42ab5f2 100644
--- a/plat/nvidia/tegra/common/tegra_pm.c
+++ b/plat/nvidia/tegra/common/tegra_pm.c
@@ -55,6 +55,7 @@
#pragma weak tegra_soc_pwr_domain_off
#pragma weak tegra_soc_pwr_domain_on_finish
#pragma weak tegra_soc_prepare_system_reset
+#pragma weak tegra_soc_prepare_system_off
int tegra_soc_pwr_domain_suspend(const psci_power_state_t *target_state)
{
@@ -81,6 +82,12 @@
return PSCI_E_SUCCESS;
}
+__dead2 void tegra_soc_prepare_system_off(void)
+{
+ ERROR("Tegra System Off: operation not handled.\n");
+ panic();
+}
+
/*******************************************************************************
* This handler is called by the PSCI implementation during the `SYSTEM_SUSPEND`
* call to get the `power_state` parameter. This allows the platform to encode
@@ -199,8 +206,9 @@
******************************************************************************/
__dead2 void tegra_system_off(void)
{
- ERROR("Tegra System Off: operation not handled.\n");
- panic();
+ INFO("Powering down system...\n");
+
+ tegra_soc_prepare_system_off();
}
/*******************************************************************************
@@ -208,6 +216,8 @@
******************************************************************************/
__dead2 void tegra_system_reset(void)
{
+ INFO("Restarting system...\n");
+
/* per-SoC system reset handler */
tegra_soc_prepare_system_reset();
