Struct RockchipPM 

pub struct RockchipPM { /* private fields */ }

Rockchip Power Management Unit driver

This structure provides control over power domains for Rockchip SoCs, allowing dynamic power gating of various IP blocks like GPU, NPU, VCODEC, etc.

Implementations

impl RockchipPM

pub fn new(base: NonNull<u8>, board: RkBoard) -> Self

Create a new RockchipPM driver instance

Arguments

• base - Base address of the PMU registers
• board - The specific board type (RK3588 or RK3568)

Example

use rockchip_pm::{RockchipPM, RkBoard};
use core::ptr::NonNull;

let base = unsafe { NonNull::new_unchecked(0xfd5d8000 as *mut u8) };
let pm = RockchipPM::new(base, RkBoard::Rk3588);

pub fn new_with_compatible(base: NonNull<u8>, compatible: &str) -> Self

Create a new RockchipPM driver instance using device tree compatible string

Arguments

• base - Base address of the PMU registers
• compatible - Device tree compatible string (e.g., “rockchip,rk3588-power-controller”)

Panics

Panics if the compatible string is not supported

Example

use rockchip_pm::RockchipPM;
use core::ptr::NonNull;

let base = unsafe { NonNull::new_unchecked(0xfd5d8000 as *mut u8) };
let pm = RockchipPM::new_with_compatible(base, "rockchip,rk3588-power-controller");

pub fn get_power_dowain_by_name(&self, name: &str) -> Option<PowerDomain>

Find a power domain by its name

Arguments

• name - Name of the power domain (e.g., “npu”, “gpu”, “vcodec”)

Returns

Some(PowerDomain) if found, None otherwise

Example

let domain = pm.get_power_dowain_by_name("npu");
assert_eq!(domain, Some(PowerDomain::NPU));

pub fn power_domain_on(&mut self, domain: PowerDomain) -> PmResult<()>

Turn on the specified power domain

This function enables power to the specified domain, initializing the associated hardware blocks.

Arguments

• domain - The power domain to turn on

Errors

Returns PmError::DomainNotFound if the domain does not exist Returns PmError::Timeout if the power domain fails to turn on within the timeout period

Example

pm.power_domain_on(PowerDomain::NPU).unwrap();

pub fn power_domain_off(&mut self, domain: PowerDomain) -> PmResult<()>

Turn off the specified power domain

This function cuts power to the specified domain, putting the associated hardware blocks into a low-power state.

Arguments

• domain - The power domain to turn off

Errors

Returns PmError::DomainNotFound if the domain does not exist Returns PmError::Timeout if the power domain fails to turn off within the timeout period

Example

pm.power_domain_off(PowerDomain::NPU).unwrap();

Trait Implementations

impl DriverGeneric for RockchipPM

fn open(&mut self) -> Result<(), KError>

fn close(&mut self) -> Result<(), KError>

fn raw_any(&self) -> Option<&(dyn Any + 'static)>

Subtype casting support, returns subtype as &dyn Any

fn raw_any_mut(&mut self) -> Option<&mut (dyn Any + 'static)>

Subtype casting support, returns subtype as &mut dyn Any