Add implementation of ticker_free() function to CI boards.

This PR provides implementation of ticker_free() function for the following boards:
ARCH_PRO
EV_COG_AD3029LZ
EV_COG_AD4050LZ
K22F
K64F
K82F
KW24D
KW41Z
LPC546XX
NRF51_DK
NRF52_DK
NUCLEO_F207ZG
NUCLEO_F401RE
NUCLEO_F429ZI
NUCLEO_F746ZG
REALTEK_RTL8195AM

targets/TARGET_Analog_Devices/TARGET_ADUCM302X/TARGET_ADUCM3029/api/us_ticker.c

@@ -357,7 +357,7 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
-
+    adi_tmr_Enable(ADI_TMR_DEVICE_GP2, false);
 }
 
 /*

targets/TARGET_Analog_Devices/TARGET_ADUCM4X50/TARGET_ADUCM4050/api/us_ticker.c

@@ -355,7 +355,7 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
-
+    adi_tmr_Enable(ADI_TMR_DEVICE_GP2, false);
 }
 
 /*

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/us_ticker.c

@@ -139,5 +139,13 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
+    PIT_StopTimer(PIT, kPIT_Chnl_3);
+    PIT_StopTimer(PIT, kPIT_Chnl_2);
+    PIT_StopTimer(PIT, kPIT_Chnl_1);
+    PIT_StopTimer(PIT, kPIT_Chnl_0);
 
+    PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable);
+    NVIC_DisableIRQ(PIT3_IRQn);
+
+    us_ticker_inited = false;
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KW24D/us_ticker.c

@@ -139,5 +139,13 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
+    PIT_StopTimer(PIT, kPIT_Chnl_3);
+    PIT_StopTimer(PIT, kPIT_Chnl_2);
+    PIT_StopTimer(PIT, kPIT_Chnl_1);
+    PIT_StopTimer(PIT, kPIT_Chnl_0);
 
+    PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable);
+    NVIC_DisableIRQ(PIT3_IRQn);
+
+    us_ticker_inited = false;
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_KW41Z/us_ticker.c

@@ -155,5 +155,11 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
+    PIT_StopTimer(PIT, kPIT_Chnl_1);
+    PIT_StopTimer(PIT, kPIT_Chnl_0);
 
+    TPM_DisableInterrupts(TPM2, kTPM_TimeOverflowInterruptEnable);
+    NVIC_DisableIRQ(TPM2_IRQn);
+
+    us_ticker_inited = false;
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K22F/us_ticker.c

@@ -139,5 +139,13 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
+    PIT_StopTimer(PIT, kPIT_Chnl_3);
+    PIT_StopTimer(PIT, kPIT_Chnl_2);
+    PIT_StopTimer(PIT, kPIT_Chnl_1);
+    PIT_StopTimer(PIT, kPIT_Chnl_0);
 
+    PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable);
+    NVIC_DisableIRQ(PIT3_IRQn);
+
+    us_ticker_inited = false;
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/us_ticker.c

@@ -70,6 +70,7 @@ void us_ticker_init(void)
     PIT_StopTimer(PIT, kPIT_Chnl_2);
     PIT_SetTimerPeriod(PIT, kPIT_Chnl_2, busClock / 1000000 - 1);
     PIT_SetTimerChainMode(PIT, kPIT_Chnl_3, true);
+    PIT_ClearStatusFlags(PIT, kPIT_Chnl_3, PIT_TFLG_TIF_MASK);
     NVIC_SetVector(PIT3_IRQn, (uint32_t) pit_isr);
     NVIC_EnableIRQ(PIT3_IRQn);
     PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable);
@@ -139,5 +140,13 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
+    PIT_StartTimer(PIT, kPIT_Chnl_3);
+    PIT_StartTimer(PIT, kPIT_Chnl_2);
+    PIT_StartTimer(PIT, kPIT_Chnl_1);
+    PIT_StartTimer(PIT, kPIT_Chnl_0);
 
+    PIT_DisableInterrupts(PIT, kPIT_Chnl_3, kPIT_TimerInterruptEnable);
+    NVIC_DisableIRQ(PIT3_IRQn);
+
+    us_ticker_inited = false;
 }

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/lp_ticker.c

@@ -69,6 +69,7 @@ void lp_ticker_init(void)
         lp_ticker_inited = true;
     } else {
         LPTMR_DisableInterrupts(LPTMR0, kLPTMR_TimerInterruptEnable);
+        NVIC_EnableIRQ(LPTMR0_IRQn);
     }
 }
 
@@ -119,7 +120,8 @@ void lp_ticker_clear_interrupt(void)
 
 void lp_ticker_free(void)
 {
-
+    LPTMR_DisableInterrupts(LPTMR0, kLPTMR_TimerInterruptEnable);
+    NVIC_DisableIRQ(LPTMR0_IRQn);
 }
 
 #endif /* DEVICE_LPTICKER */

targets/TARGET_NORDIC/TARGET_NRF5x/common_rtc.c

@@ -180,6 +180,15 @@ void common_rtc_init(void)
     m_common_rtc_enabled = true;
 }
 
+void common_rtc_free()
+{
+    nrf_rtc_task_trigger(COMMON_RTC_INSTANCE, NRF_RTC_TASK_STOP);
+    nrf_rtc_int_disable(COMMON_RTC_INSTANCE, LP_TICKER_INT_MASK);
+    NVIC_DisableIRQ(nrf_drv_get_IRQn(COMMON_RTC_INSTANCE));
+
+    m_common_rtc_enabled = false;
+}
+
 void common_rtc_set_interrupt(uint32_t ticks_count, uint32_t cc_channel,
                               uint32_t int_mask)
 {

targets/TARGET_NORDIC/TARGET_NRF5x/lp_ticker.c

@@ -36,8 +36,7 @@ void lp_ticker_init(void)
 
 void lp_ticker_free(void)
 {
-    // A common counter is used for RTC, lp_ticker and us_ticker, so it can't be
-    // disabled here, but this does not cause any extra cost.
+    common_rtc_free();
 }
 
 uint32_t lp_ticker_read()

targets/TARGET_NORDIC/TARGET_NRF5x/us_ticker.c

@@ -140,8 +140,7 @@ void us_ticker_clear_interrupt(void)
 void us_ticker_free(void)
 {
     nrf_timer_task_trigger(NRF_TIMER1, NRF_TIMER_TASK_STOP);
-
     nrf_timer_int_disable(NRF_TIMER1, nrf_timer_compare_int_get(NRF_TIMER_CC_CHANNEL0));
-
+    NVIC_DisableIRQ(TIMER1_IRQn);
     us_ticker_initialized = false;
 }

targets/TARGET_NXP/TARGET_LPC176X/us_ticker.c

@@ -80,5 +80,8 @@ void us_ticker_clear_interrupt(void) {
 
 void us_ticker_free(void)
 {
+    US_TICKER_TIMER->TCR = 0;
 
+    US_TICKER_TIMER->MCR &= ~1;
+    NVIC_DisableIRQ(US_TICKER_TIMER_IRQn);
 }

targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/us_ticker.c

@@ -100,5 +100,8 @@ void us_ticker_fire_interrupt(void)
 
 void us_ticker_free(void)
 {
-
+    CTIMER_StopTimer(CTIMER1);
+    CTIMER1->MCR &= ~1;
+    NVIC_DisableIRQ(CTIMER1_IRQn);
+    us_ticker_inited = false;
 }

targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/us_ticker.c

@@ -122,5 +122,5 @@ void us_ticker_clear_interrupt(void)
 
 void us_ticker_free(void)
 {
-
+    HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
 }

targets/TARGET_STM/lp_ticker.c

@@ -231,7 +231,7 @@ void lp_ticker_clear_interrupt(void)
 
 void lp_ticker_free(void)
 {
-
+    lp_ticker_disable_interrupt();
 }
 
 /*****************************************************************/
@@ -278,12 +278,12 @@ void lp_ticker_disable_interrupt(void)
 
 void lp_ticker_clear_interrupt(void)
 {
-    NVIC_DisableIRQ(RTC_WKUP_IRQn);
+    lp_ticker_disable_interrupt();
 }
 
 void lp_ticker_free(void)
 {
-
+    lp_ticker_disable_interrupt();
 }
 
 #endif /* MBED_CONF_TARGET_LPTICKER_LPTIM */

targets/TARGET_STM/us_ticker.c

@@ -206,6 +206,7 @@ void us_ticker_init(void)
 {
     // Timer is already initialized in HAL_InitTick()
     __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
+    HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
 }
 
 uint32_t us_ticker_read()
@@ -259,6 +260,7 @@ void restore_timer_ctx(void)
 
 void us_ticker_free(void)
 {
-
+    HAL_TIM_OC_Stop(&TimMasterHandle, TIM_CHANNEL_1);
+    us_ticker_disable_interrupt();
 }