Fix delay on esp32h2. (#1535)

* Fix delay on `esp32h2`

* Add changelog entry

* Enable `esp32h2` chip in `get_time` HIL test

esp-hal/CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Removed ESP32 specific code for resolutions > 16 bit in ledc embedded_hal::pwm max_duty_cycle function. (#1441)
 - Fixed division by zero in ledc embedded_hal::pwm set_duty_cycle function and converted to set_duty_hw instead of set_duty to eliminate loss of granularity. (#1441)
 - Embassy examples now build on stable (#1485)
+- Fix delay on esp32h2 (#1535)
 
 ### Changed
 

esp-hal/src/delay.rs

@@ -84,7 +84,11 @@ mod implementation {
             // The average clock frequency is fXTAL_CLK/2.5, which is 16 MHz.
             // The timer counting is incremented by 1/16 μs on each `CNT_CLK` cycle.
             Self {
+                #[cfg(not(esp32h2))]
                 freq: HertzU64::MHz(clocks.xtal_clock.to_MHz() as u64 * 10 / 25),
+                #[cfg(esp32h2)]
+                // esp32h2 TRM, section 11.2 Clock Source Selection
+                freq: HertzU64::MHz(clocks.xtal_clock.to_MHz() as u64 * 10 / 20),
             }
         }
 

hil-test/tests/get_time.rs

@@ -1,6 +1,6 @@
 //! current_time Test
 
-//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32s2 esp32s3
+//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3
 
 #![no_std]
 #![no_main]