PROCESSOR-SDK-OMAPL138: Secure OMAPL138 cannot go to deepsleep

Part Number:PROCESSOR-SDK-OMAPL138

Hi,

I am developing deepsleep function for secure OMAPL138 ZCE.

I had done successfully this function on normal (non-secure) OMAP L138. But when I run the same source on the secure version, I could not  gate the clocks to the DDR2/mDDR memory controller.

The GOSTAT0 bit never clear to 0 after I set disable PSC for DDR2/mDDR module.

Here is my code:

// Wait for any previously initiated transitions

// First Loop
do
{
pscstatus = HWREG(SOC_PSC_1_REGS + PSC_PTSTAT) & PSC_PTSTAT_GOSTAT0;
}
while (pscstatus);

// Disable CLK

HWREG(SOC_PSC_1_REGS + PSC_MDCTL(HW_PSC_DDR2_MDDR)) = (PSC_MDCTL_NEXT_DISABLE & PSC_MDCTL_NEXT);

HWREG(SOC_PSC_1_REGS + PSC_PTCMD) = PSC_PTCMD_GO0;

// Second Loop

do
{
pscstatus = HWREG(SOC_PSC_1_REGS + PSC_PTSTAT) & PSC_PTSTAT_GOSTAT0;
}
while (pscstatus);

So, the program never exit out of the second loop.

Could your help me to resolve this issue?

Which differences between two version of OMAP L138 (secure and non-secure) in deepsleep function?

Thanks so much.