Struct KoboPowerManager 

pub struct KoboPowerManager {
    model: Model,
    initial_cpu_states: Mutex<Vec<PathBuf>>,
}

Kobo-specific power manager.

Manages the low-level hardware sleep/wake cycle on Kobo e-reader devices. It interacts directly with the Linux sysfs interface to manage screen power and RAM suspension.

Example

use cadmus_core::device::Model;
use cadmus_core::device::power::PowerManager;

// Access via the global device singleton
if let Ok(power) = CURRENT_DEVICE.power_manager() {
    power.suspend().ok();
}

Fields

model: Model

initial_cpu_states: Mutex<Vec<PathBuf>>

Implementations

impl KoboPowerManager

pub fn new(model: Model) -> Self

Creates a new KoboPowerManager for the specified device model.

Trait Implementations

impl PowerManager for KoboPowerManager

fn suspend(&self) -> Result<(), PowerError>

Suspends the Kobo device.

This method performs a sequenced hardware shutdown:

1. Deactivates the touch screen to prevent phantom touches on wake up.
2. Sleeps for 2 seconds to allow pending sysfs writes to finalize safely.
3. Synchronizes filesystem buffers (sync()).
4. Writes "mem" to /sys/power/state to trigger low-power RAM suspension.

Errors

Returns PowerError::Io if writing to any of the sysfs control nodes fails.

fn resume(&self) -> Result<(), PowerError>

Resumes the Kobo device.

This method performs the following wakeup tasks:

1. Reactivates the touch screen by writing "0" to the state-extended node.
2. If the model is a GloHD or AuraH2O, writes "a" to the neocmd node to re-initialize the touch controller.

Errors

Returns PowerError::Io if writing to any of the sysfs wake up nodes fails.

fn init_cores(&self) -> Result<(), PowerError>

Initializes and enables all available CPU cores on startup.

fn restore_cores(&self) -> Result<(), PowerError>

Restores CPU cores to their initial state on shutdown.