diff --git a/kernel/src/device/clock/jh7110_aoncrg.rs b/kernel/src/device/clock/jh7110_aoncrg.rs
index 49941204..8c47f014 100644
--- a/kernel/src/device/clock/jh7110_aoncrg.rs
+++ b/kernel/src/device/clock/jh7110_aoncrg.rs
@@ -13,7 +13,7 @@ use device_tree::{
     DeviceTreePropertyRead, TProp,
 };
 use libk_mm::{address::PhysicalAddress, device::DeviceMemoryIo};
-use libk_util::{sync::IrqSafeSpinlock, OneTimeInit};
+use libk_util::sync::IrqSafeSpinlock;
 use tock_registers::{
     interfaces::{Readable, Writeable},
     register_structs,
@@ -58,28 +58,21 @@ enum ClockParent {
 pub struct Aoncrg {
     base: PhysicalAddress,
     clock_parents: [ClockHandle; 7],
-    mapping: OneTimeInit<IrqSafeSpinlock<DeviceMemoryIo<'static, Regs>>>,
+    mapping: IrqSafeSpinlock<DeviceMemoryIo<'static, Regs>>,
 }
 
 impl Aoncrg {
-    fn ensure_init(&self) -> Result<&IrqSafeSpinlock<DeviceMemoryIo<'static, Regs>>, Error> {
-        self.mapping.or_try_init_with(|| {
-            unsafe { DeviceMemoryIo::map(self.base, Default::default()) }.map(IrqSafeSpinlock::new)
-        })
-    }
-
     fn clk_enable_int(&self, index: u32) -> Result<(), Error> {
         let (name, reg) = Self::map_clock_index(index)
             .ok_or(Error::InvalidArgument)
             .inspect_err(|_| log::warn!("jh7110-syscrg: undefined clock {:?}", index))?;
-        let regs = self.ensure_init()?;
 
         match reg {
             ClockRegister::Fixed => Ok(()),
             ClockRegister::Gate(bit, parent) => {
                 self.clk_enable_parent(parent)?;
                 log::info!("jh7110-aoncrg: enable {name:?} @ {index}");
-                let lock = regs.lock();
+                let lock = self.mapping.lock();
                 lock.CLOCKS[index as usize].set(lock.CLOCKS[index as usize].get() | (1 << bit));
                 Ok(())
             }
@@ -145,8 +138,7 @@ impl ClockController for Aoncrg {
 impl ResetController for Aoncrg {
     fn assert_reset(&self, reset: Option<u32>) -> Result<(), Error> {
         let reset = reset.ok_or(Error::InvalidArgument)?;
-        let mapping = self.ensure_init()?;
-        let regs = mapping.lock();
+        let regs = self.mapping.lock();
         let val = regs.RESETS.get();
         regs.RESETS.set(val | (1 << reset));
         Ok(())
@@ -154,8 +146,7 @@ impl ResetController for Aoncrg {
 
     fn deassert_reset(&self, reset: Option<u32>) -> Result<(), Error> {
         let reset = reset.ok_or(Error::InvalidArgument)?;
-        let mapping = self.ensure_init()?;
-        let regs = mapping.lock();
+        let regs = self.mapping.lock();
         let val = regs.RESETS.get();
         regs.RESETS.set(val & !(1 << reset));
         Ok(())
@@ -204,11 +195,14 @@ device_tree_driver! {
                 node.named_clock("rtc_osc")?,
             ];
 
+            let mapping = unsafe { DeviceMemoryIo::map(base, Default::default()) }.ok()?;
+
             let aoncrg = Arc::new(Aoncrg {
                 base,
                 clock_parents,
-                mapping: OneTimeInit::new()
+                mapping: IrqSafeSpinlock::new(mapping)
             });
+
             node.make_reset_controller(aoncrg.clone());
             node.make_clock_controller(aoncrg.clone());
             Some(aoncrg)
diff --git a/kernel/src/device/clock/jh7110_syscrg.rs b/kernel/src/device/clock/jh7110_syscrg.rs
index 3359d195..88c5dc7b 100644
--- a/kernel/src/device/clock/jh7110_syscrg.rs
+++ b/kernel/src/device/clock/jh7110_syscrg.rs
@@ -14,14 +14,14 @@ use device_tree::{
     DeviceTreePropertyRead, TProp,
 };
 use libk_mm::{address::PhysicalAddress, device::DeviceMemoryIoMut};
-use libk_util::{sync::IrqSafeSpinlock, OneTimeInit};
+use libk_util::sync::IrqSafeSpinlock;
 
 const PARENT_CLK_OSC: usize = 0;
 
 struct Syscrg {
     base: PhysicalAddress,
     parents: [ClockHandle; 1],
-    mapping: OneTimeInit<IrqSafeSpinlock<DeviceMemoryIoMut<'static, [u32]>>>,
+    mapping: IrqSafeSpinlock<DeviceMemoryIoMut<'static, [u32]>>,
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -43,31 +43,23 @@ enum ClockRegister {
 }
 
 impl Syscrg {
-    fn ensure_init(&self) -> Result<&IrqSafeSpinlock<DeviceMemoryIoMut<'static, [u32]>>, Error> {
-        self.mapping.or_try_init_with(move || {
-            unsafe { DeviceMemoryIoMut::map_slice(self.base, 256, Default::default()) }
-                .map(IrqSafeSpinlock::new)
-        })
-    }
-
     fn clk_enable_int(&self, index: u32, depth: u32) -> Result<(), Error> {
         let (name, reg) = Self::map_clock_index(index)
             .ok_or(Error::InvalidArgument)
             .inspect_err(|_| log::warn!("jh7110-syscrg: undefined clock {:?}", index))?;
-        let regs = self.ensure_init()?;
 
         match reg {
             ClockRegister::Gate(bit, parent) => {
                 log::info!("jh7110-syscrg: enable {name:?} @ {index} /{depth}");
                 self.clk_enable_parent(parent, depth)?;
-                let mut lock = regs.lock();
+                let mut lock = self.mapping.lock();
                 lock[index as usize] |= 1 << bit;
                 Ok(())
             }
             ClockRegister::Inv(bit, parent) => {
                 log::info!("jh7110-syscrg: enable clk inv {name:?} @ {index}");
                 self.clk_enable_parent(parent, depth)?;
-                let mut lock = regs.lock();
+                let mut lock = self.mapping.lock();
                 lock[index as usize] |= 1 << bit;
                 Ok(())
             }
@@ -182,8 +174,7 @@ impl Syscrg {
     fn rst_trigger(&self, reset: u32, assert: bool) -> Result<(), Error> {
         let reg = (190 + reset / 32) as usize;
         let bit = reset % 32;
-        let regs = self.ensure_init()?;
-        let mut regs = regs.lock();
+        let mut regs = self.mapping.lock();
 
         let expect = if assert {
             regs[reg] |= 1 << bit;
@@ -246,17 +237,23 @@ impl DeviceTreeResetController for Syscrg {
     }
 }
 
+unsafe impl Sync for Syscrg {}
+unsafe impl Send for Syscrg {}
+
 device_tree_driver! {
     compatible: ["starfive,jh7110-syscrg"],
     driver: {
         fn probe(&self, node: &Arc<Node>, context: &mut ProbeContext) -> Option<Arc<dyn Device>> {
             let base = node.map_base(context, 0)?;
             let osc = node.named_clock("osc")?;
+            let mapping = unsafe { DeviceMemoryIoMut::map_slice(base, 256, Default::default()) }
+                .inspect_err(|error| log::error!("jh7110-syscrg: {error:?}"))
+                .ok()?;
 
             let syscrg = Arc::new(Syscrg {
                 base,
                 parents: [osc],
-                mapping: OneTimeInit::new(),
+                mapping: IrqSafeSpinlock::new(mapping),
             });
             node.make_reset_controller(syscrg.clone());
             node.make_clock_controller(syscrg.clone());