Hi,
I am using imxqm with only A53 cores enabled.
Presently trying to self suspend A53 cores(0,1,2,3) using below mentioned scu API but i see cores are not suspending and DDR also not in refresh mode.
/*************************************sleep sequence****************************************************/
sc_irq_enable(ipc_handle, 297U, SC_IRQ_GROUP_WAKE, SC_IRQ_PAD, SC_TRUE);
/* Enable GPIO pad wakeup */
sc_pad_set_wakeup(ipc_handle, 40U, 6U);//SC_PAD_WAKEUP_RISE_EDGE 6U
/* make sure system sources power ON in low power mode by default */
sc_pm_req_low_power_mode(ipc_handle, SC_R_A53_0, SC_PM_PW_MODE_ON);
/* Config system interface HPM, LPM */
sc_pm_req_sys_if_power_mode(ipc_handle, SC_R_A53, SC_PM_SYS_IF_DDR, SC_PM_PW_MODE_ON, SC_PM_PW_MODE_OFF);
sc_pm_req_sys_if_power_mode(ipc_handle, SC_R_A53, SC_PM_SYS_IF_OCMEM, SC_PM_PW_MODE_ON, SC_PM_PW_MODE_OFF);
sc_pm_req_sys_if_power_mode(ipc_handle, SC_R_A53, SC_PM_SYS_IF_MU, SC_PM_PW_MODE_OFF, SC_PM_PW_MODE_OFF);
sc_pm_req_sys_if_power_mode(ipc_handle, SC_R_A53, SC_PM_SYS_IF_INTERCONNECT, SC_PM_PW_MODE_ON,
SC_PM_PW_MODE_OFF);
sc_pm_set_cpu_resume(ipc_handle, SC_R_A53_0,true, 0x80000000);//
sc_pm_req_cpu_low_power_mode(ipc_handle, 1U,SC_PM_PW_MODE_OFF, SC_PM_WAKE_SRC_SCU);
__asm__("dsb sy");
__asm__("wfi");
while(1);
/************************************************************************************************/
/***************************wake-up sequence******************************************/
/* Query SCU wakeup event status */
#if 1
uInt32 status;
sc_irq_status(ipc_handle, 297U, SC_IRQ_GROUP_WAKE, &status);
/* Check for pad wakeup */
if (status & SC_IRQ_PAD)
{
/* Check for GPIO pad wakeup */
/* Note: SCFW updates pending pad wakeup config to SC_PAD_WAKEUP_OFF */
uInt8 gpio_wakeup;
//sc_pad_get_wakeup(ipc_handle, 40U, &gpio_wakeup);
if (gpio_wakeup == SC_PAD_WAKEUP_OFF)
{
/* GPIO pad generated wake event */
print(DEBUG_PRINT_ALWAYS, "GPIO wakeup\r\n");
} }
Is the suspend sequnce all good, because if i add any print statemnt inside while(1), is it still executing that mean A53 are still alive.
Is there any other steps do we need to follow before suspending, or is there any method to check if cores are suspend mode.
