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clocks: split clock and reset operations

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Some peripherals need to control clock without touching the reset.

Signed-off-by: Felipe Balbi <febalbi@microsoft.com>
This commit is contained in:
Felipe Balbi 2025-05-07 10:39:25 -07:00
parent 70e2c05205
commit 64ce271af5
1 changed files with 22 additions and 8 deletions
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30
embassy-imxrt/src/clocks.rs
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@ -1561,7 +1561,8 @@ pub(crate) unsafe fn init(config: ClockConfig) -> Result<(), ClockError> {
///Trait to expose perph clocks
trait SealedSysconPeripheral {
fn enable_and_reset_perph_clock();
fn enable_perph_clock();
fn reset_perph();
fn disable_perph_clock();
}
@ -1574,7 +1575,18 @@ pub trait SysconPeripheral: SealedSysconPeripheral + 'static {}
///
/// Peripheral must not be in use.
pub fn enable_and_reset<T: SysconPeripheral>() {
T::enable_and_reset_perph_clock();
T::enable_perph_clock();
T::reset_perph();
}
/// Enables peripheral `T`.
pub fn enable<T: SysconPeripheral>() {
T::enable_perph_clock();
}
/// Reset peripheral `T`.
pub fn reset<T: SysconPeripheral>() {
T::reset_perph();
}
/// Disables peripheral `T`.
@ -1588,15 +1600,21 @@ pub fn disable<T: SysconPeripheral>() {
macro_rules! impl_perph_clk {
($peripheral:ident, $clkctl:ident, $clkreg:ident, $rstctl:ident, $rstreg:ident, $bit:expr) => {
impl SealedSysconPeripheral for crate::peripherals::$peripheral {
fn enable_and_reset_perph_clock() {
fn enable_perph_clock() {
// SAFETY: unsafe needed to take pointers to Rstctl1 and Clkctl1
let cc1 = unsafe { pac::$clkctl::steal() };
let rc1 = unsafe { pac::$rstctl::steal() };
paste! {
// SAFETY: unsafe due to the use of bits()
cc1.[<$clkreg _set>]().write(|w| unsafe { w.bits(1 << $bit) });
}
}
fn reset_perph() {
// SAFETY: unsafe needed to take pointers to Rstctl1 and Clkctl1
let rc1 = unsafe { pac::$rstctl::steal() };
paste! {
// SAFETY: unsafe due to the use of bits()
rc1.[<$rstreg _clr>]().write(|w| unsafe { w.bits(1 << $bit) });
}
@ -1605,12 +1623,8 @@ macro_rules! impl_perph_clk {
fn disable_perph_clock() {
// SAFETY: unsafe needed to take pointers to Rstctl1 and Clkctl1
let cc1 = unsafe { pac::$clkctl::steal() };
let rc1 = unsafe { pac::$rstctl::steal() };
paste! {
// SAFETY: unsafe due to the use of bits()
rc1.[<$rstreg _set>]().write(|w| unsafe { w.bits(1 << $bit) });
// SAFETY: unsafe due to the use of bits()
cc1.[<$clkreg _clr>]().write(|w| unsafe { w.bits(1 << $bit) });
}