GPIO output pin HIGH in suspend mode (imx8qm)

[oscarabril]

Hi, 

I have an enable pin connected to a peripheral that I want to maintain HIGH during normal mode and suspend mode ($systemctl suspend). 

In the DTS:

IMX8QM_LVDS0_GPIO01_LSIO_GPIO1_IO05 0x00000061

Do you know how can I configure this pin to maintain its value when is in suspended mode?

Best regards.

[riteshmpatel]

Hi @oscarabril,

I hope you are doing well.

Since the value of the register remains the same in the normal mode and suspend mode, no configurations are needed to be done.

Thanks & Regards,
Ritesh M Patel

[oscarabril]

Thanks, and if the register is different in suspend mode? How can I handle this?

Best regards.

[jackie2]

Found one example in linux-imx\arch\arm64\boot\dts\freescale\imx8qm-mek.dts

And it matches the description in RM and scfw documents. 

And LATCH should work, you can try it. 

i.MX8QM has several settings in low power mode.

[riteshmpatel]

Hi @oscarabril,

The register value remains the same in normal and suspend modes.

Thanks & Regards,
Ritesh M Patel