include: zephyr: sys: time_units: Make z_clock_hw_cycles_per_sec unsigned

Convert z_clock_hw_cycles_per_sec to unsigned int to increase
supported frequency range.

Signed-off-by: Anisetti Avinash Krishna <anisetti.avinash.krishna@intel.com>

drivers/clock_control/clock_control_smartbond.c

@@ -39,7 +39,7 @@ struct lpc_clock_state {
 #define CALIBRATION_INTERVAL CONFIG_SMARTBOND_LP_OSC_CALIBRATION_INTERVAL
 
 #ifdef CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
-extern int z_clock_hw_cycles_per_sec;
+extern unsigned int z_clock_hw_cycles_per_sec;
 #endif
 
 static void calibration_work_cb(struct k_work *work);

drivers/timer/gecko_burtc_timer.c

@@ -54,7 +54,7 @@ const int32_t z_sys_timer_irq_for_test = TIMER_IRQ;
 /* With CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME, that's where we
  * should write hw_cycles timer clock frequency upon init
  */
-extern int z_clock_hw_cycles_per_sec;
+extern unsigned int z_clock_hw_cycles_per_sec;
 
 /* Number of hw_cycles clocks per 1 kernel tick */
 static uint32_t g_cyc_per_tick;

drivers/timer/hpet.c

@@ -415,7 +415,7 @@ void sys_clock_idle_exit(void)
 __boot_func
 static int sys_clock_driver_init(void)
 {
-	extern int z_clock_hw_cycles_per_sec;
+	extern unsigned int z_clock_hw_cycles_per_sec;
 	uint32_t hz, reg;
 
 	ARG_UNUSED(hz);

drivers/timer/silabs_sleeptimer_timer.c

@@ -30,7 +30,7 @@ LOG_MODULE_REGISTER(silabs_sleeptimer_timer);
 /* With CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME, this global variable holds the clock frequency,
  * and must be written by the driver at init.
  */
-extern int z_clock_hw_cycles_per_sec;
+extern unsigned int z_clock_hw_cycles_per_sec;
 
 /* Global timer state */
 struct sleeptimer_timer_data {

include/zephyr/arch/arm64/timer.h

@@ -26,11 +26,11 @@ extern "C" {
 static ALWAYS_INLINE void arm_arch_timer_init(void)
 {
 #ifdef CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
-	extern int z_clock_hw_cycles_per_sec;
+	extern unsigned int z_clock_hw_cycles_per_sec;
 	uint64_t cntfrq_el0 = read_cntfrq_el0();
 
-	__ASSERT(cntfrq_el0 < INT_MAX, "cntfrq_el0 cannot fit in system 'int'");
-	z_clock_hw_cycles_per_sec = (int) cntfrq_el0;
+	__ASSERT(cntfrq_el0 < UINT_MAX, "cntfrq_el0 cannot fit in system 'unsigned int'");
+	z_clock_hw_cycles_per_sec = (unsigned int) cntfrq_el0;
 #endif
 }
 

include/zephyr/sys/time_units.h

@@ -52,11 +52,11 @@ extern "C" {
 /* Exhaustively enumerated, highly optimized time unit conversion API */
 
 #if defined(CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME)
-__syscall int sys_clock_hw_cycles_per_sec_runtime_get(void);
+__syscall unsigned int sys_clock_hw_cycles_per_sec_runtime_get(void);
 
-static inline int z_impl_sys_clock_hw_cycles_per_sec_runtime_get(void)
+static inline unsigned int z_impl_sys_clock_hw_cycles_per_sec_runtime_get(void)
 {
-	extern int z_clock_hw_cycles_per_sec;
+	extern unsigned int z_clock_hw_cycles_per_sec;
 
 	return z_clock_hw_cycles_per_sec;
 }

kernel/timeout.c

@@ -29,10 +29,10 @@ static struct k_spinlock timeout_lock;
 static int announce_remaining;
 
 #if defined(CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME)
-int z_clock_hw_cycles_per_sec = CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC;
+unsigned int z_clock_hw_cycles_per_sec = CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC;
 
 #ifdef CONFIG_USERSPACE
-static inline int z_vrfy_sys_clock_hw_cycles_per_sec_runtime_get(void)
+static inline unsigned int z_vrfy_sys_clock_hw_cycles_per_sec_runtime_get(void)
 {
 	return z_impl_sys_clock_hw_cycles_per_sec_runtime_get();
 }

soc/neorv32/soc.c

@@ -8,7 +8,7 @@
 #include <soc.h>
 
 #ifdef CONFIG_SOC_NEORV32_READ_FREQUENCY_AT_RUNTIME
-extern int z_clock_hw_cycles_per_sec;
+extern unsigned int z_clock_hw_cycles_per_sec;
 
 void soc_early_init_hook(void)
 {