DART-6UL suspend
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Suspend to RAM
Suspend to RAM
This state offers significant power savings as everything in the system is put into a low-power state, except for memory, which is placed into the self-refresh mode to retain its contents.
NOTE:
The test in this section was performed with LCD display disconnected.
The test in this section was performed with LCD display disconnected.
To suspend to RAM:
# pm-suspend
Wake up
There are many possible ways to wake up from suspend.
A few examples:
- Pushing the ON/OFF button (when present on the board)
- Pushing a button on the board which has the boolean property "gpio-key,wakeup" set in its device tree node (under gpio_keys), e.g.:
gpio-keys { compatible = "gpio-keys"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_gpio_keys>; back { label = "Back"; gpios = <&gpio5 20 GPIO_ACTIVE_LOW>; linux,code = <KEY_BACK>; gpio-key,wakeup; }; };
Current consumption when suspended
To measure the current remove resistor R4 on the 6ULCustomBoard and connect an ammeter instead.
The expected measured current consumption should be around 4.5mA at 3.3V