Fix indentation. Update doxygen comments

include/sta/stm32/clocks.hpp

@@ -5,30 +5,33 @@
 #ifndef STA_CORE_STM32_CLOCKS_HPP
 #define STA_CORE_STM32_CLOCKS_HPP
 
-/**
- * @defgroup stm32 STM32
- * @brief Modules implemented for STM32 MCUs.
- */
+
+// Only enable module on STM32 platform
+#include <sta/config.hpp>
+
+
+#if defined(STA_PLATFORM_STM32) || defined(DOXYGEN)
+
+#include <sta/stm32/hal.hpp>
+
 
 /**
- * @defgroup stm32BuildConfig Build config
- * @ingroup stm32
- * @brief Build configuration options.
- */
-
-/**
- * @defgroup stm32Clocks Clocks
- * @ingroup stm32
+ * @defgroup sta_core_stm32_clocks Clocks
+ * @ingroup sta_core_stm32
  * @brief STM32 Clock queries.
  * @{
  */
 
 
-// Only enable module on STM32 platform
-#include <sta/config.hpp>
-#if defined(STA_PLATFORM_STM32) || defined(DOXYGEN)
-
-#include <sta/stm32/hal.hpp>
+namespace sta
+{
+    /**
+     * @brief Get peripheral clock frequency.
+     *
+     * @return Clock frequency
+     */
+    using PCLKFreqFn = uint32_t (*)();
+} // namespace sta
 
 
 /**