AM62P: sbl boot with low power mode

KONG XIANGXU

Expert 1976 points

Part Number: AM62P

Tool/software:

hi:

Excuse me.Does the SBL startup mode support sleep wake-up。We tested that spl could sleep and wake up using the 10.0 and 10.1 SDKS, but found that the SBL mode startup of emmc could not sleep and wake up。

Please help test and confirm。

thank！

3 months ago

0 Anshu Madwesh 3 months ago

TI__Genius 17850 points

Hello,

TI Linux SDK Low Power modes are tested using SPL boot and confirm that it works.

In SPL boot, the kernel uses Linux remoteproc drivers to load different cores. Since Linux is responsible for loading the cores, Linux is aware that these various remote cores exist and able to properly suspend/resume each core for the low power mode.

SBL boot doesn't work with Low Power Modes.

In SBL boot, Linux is not responsible for loading the different cores rather its handled by the SBL. This causes Linux to be unaware of these remote cores so it won't be able to suspned/resume each core.

Best Regards,

Anshu

0 KONG XIANGXU 3 months ago in reply to Anshu Madwesh

Expert 1976 points

hello：

Can this function help support the development? We need to implement sleep wake-up on sbl。

0 KONG XIANGXU 3 months ago in reply to Anshu Madwesh

Expert 1976 points

hello:

May I ask if this function uses a development plan and, if so, how long is the development time.We need this function at the current project stage

thank!

0 Mukul Bhatnagar 3 months ago in reply to KONG XIANGXU

TI__Guru* 83705 points

Hello Kong

This is not in our development plan. This is not currently in our roadmap for 2025. If we see more requests from other customers, we will reasses for 2026 plans later this year.

Regards

Mukul

0 KONG XIANGXU 3 months ago in reply to Anshu Madwesh

Expert 1976 points

hello：

ok，If the spl mode mcu_only mode is used, how should the logic for the mcu to wake up the hardware be designed? Should one pin of the mcu field be used as the output and input to the wake-up pin of the soc

0 Kendall Willis 3 months ago in reply to KONG XIANGXU

TI__Prodigy 330 points

Hi Kong,

Wakeup sources and how they need to be configured to wakeup the system are detailed here: https://software-dl.ti.com/processor-sdk-linux/esd/AM62PX/latest/exports/docs/linux/Foundational_Components/Power_Management/pm_wakeup_sources.html

Best,

Kendall

0 KONG XIANGXU 3 months ago in reply to Kendall Willis

Expert 1976 points

hello：

The software has verified the sleep wake-up by simulating the edge trigger of io by itself. What I want to ask is that the mcu_only mode wakes up the soc through the IO of the mcu to give the wake-up signal. Is the hardware design to connect the io of the mcu domain to the wake-up source pin of the soc domain to achieve the wake-up effect? Is there a more convenient hardware solution

0 KONG XIANGXU 3 months ago in reply to KONG XIANGXU

Expert 1976 points

I found in the MCU source/drivers/soc/am62px/soc.c SOC_triggerMcuLpmWakeup function can achieve wake effect, so I don't have the hardware revision to use IO awakened?

0 Kendall Willis 3 months ago in reply to KONG XIANGXU

TI__Prodigy 330 points

Hi Kong,

All of the wakeup sources that can be used for DeepSleep, can also be used for MCU Only mode with no extra configuration needed to work for MCU Only mode. How you can enable these sources are detailed here: https://software-dl.ti.com/processor-sdk-linux/esd/AM62PX/latest/exports/docs/linux/Foundational_Components/Power_Management/pm_wakeup_sources.html

Best,

Kendall

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AM62P: sbl boot with low power mode