feat: support nrf54 GRTC as time-driver

* Refactor GRTC peripheral splitting it into multiple channels
* Reserve channel 1 for time-driver if enabled
* Implement time-driver using GRTC (RTC peripheral is now removed).
* Add timer example to nrf54l15

1 files changed, 30 insertions, 0 deletions

diff --git a/examples/nrf54l15/src/bin/timer.rs b/examples/nrf54l15/src/bin/timer.rs
new file mode 100644
index 000000000..68acc91c1
--- /dev/null
+++ b/examples/nrf54l15/src/bin/timer.rs
@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+
+use defmt::{info, unwrap};
+use embassy_executor::Spawner;
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::task]
+async fn run1() {
+    loop {
+        info!("BIG INFREQUENT TICK");
+        Timer::after_secs(10).await;
+    }
+}
+
+#[embassy_executor::task]
+async fn run2() {
+    loop {
+        info!("tick");
+        Timer::after_secs(1).await;
+    }
+}
+
+#[embassy_executor::main]
+async fn main(spawner: Spawner) {
+    let _p = embassy_nrf::init(Default::default());
+    spawner.spawn(unwrap!(run1()));
+    spawner.spawn(unwrap!(run2()));
+}