AM3352: "xxx_sleep" block in "am33xx_pinmux" block in device tree file.

Naoto Uegaki

Part Number: AM3352

There are several xxx_sleep blocks in am33xx_pinmux block in "$kernel/arch/arm/boot/dts/am335x-evmsk.dts".
For example, there are lcd_pins_default and lcd_pins_sleep.
Could you teach me what purpose of lcd_pins_sleep is ?
And, could you teach me when to implement xxx_sleep block ?

over 3 years ago

+1 Bin Liu over 3 years ago

TI__Guru**** 169481 points

Hi,

> Could you teach me what purpose of lcd_pins_sleep is ?

The sleep pinmux DT node is for setting the pinmux state when the system in sleep state.

> And, could you teach me when to implement xxx_sleep block ?

One way to figure this out is to check the device driver. If the corresponding device driver PM suspend function calls pinctrl_pm_select_sleep_state(), then the xxx_sleep pinmux state should be defined in DT.

0 Naoto Uegaki over 3 years ago in reply to Bin Liu

Intellectual 775 points

Thank you for reply.
I understand that.

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AM3352: "xxx_sleep" block in "am33xx_pinmux" block in device tree file.