DM385: Deep sleep mode support

Refer to the below e2e thread:

e2e.ti.com/.../521535

Regards,
Pavel

Hi Pavel,

Thanks for your reply,

I have gone through the link but still i suspect below file arch/arm/mach-omap2/sleep814x.S

is it ok?

Regards,

RAJ M

sleep814x.S

RAJ.M said:

For enable follow the bellow steps

mount -t debugfs debugfs /sys/kernel/debug

echo 1 > /sys/kernel/debug/pm_debug/enable_deep_sleep

But its not going to deep sleep mode still it consumes 550mA.

The steps are:
1.Mount debugfs
2. set to 1 enable_deep_sleep flag
3. pass "mem" to /sys/power/state

More info you can find in the e2e thread already provided to you.

Regards,

Pavel

Hi Pavel,

If i read back the DEEPSLEEP_CTRL and DEEPSLEEP_STATUS register deepsleep not set in the register?

If i pass "mem" to /sys/power/state

after that i have no control in minicom its hangs

Regards,
RAJ M

RAJ.M said:

I have gone through the link but still i suspect below file arch/arm/mach-omap2/sleep814x.S

is it ok?

I checked your sleep814x.S file and I do not see any difference with the default one! Could you please specify what changes you have made so far in this file? If no changes are made why you send me this file for review? What should I review there?

The polling (that should be fixed) is in the below file:

linux-kernel/arch/arm/mach-omap2/sleep814x.S

ds_completion_loop:
ldr r8, [r3, #DEEPSLEEP_STATUS]
and r8, r8, #0x1 @poll for DSCOMPLETE
cmp r8, #0x1 @ == 1 if DSCOUNT equals timer
bne ds_completion_loop

For more info see:

Regards,
Pavel

RAJ.M said:

We are using DM385 based IPNC 3.5 custom board.

To be able to test DeepSleep support, OSC_WAKE pin should be attached to SW button

See also DM385 TRM, sections 2.4 Oscillator and 3.2.13 AUXOSC Register

Regards,
Pavel

Hi,

I hope the above inputs were helpful in solving your issue. If the issue is solved then please close it by verifying answer.

Regards,
Anuj
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