264 lines
7.4 KiB
C
264 lines
7.4 KiB
C
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/*
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* Copyright 2017-2019 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "fsl_sema4.h"
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/******************************************************************************
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* Definitions
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*****************************************************************************/
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/* Component ID definition, used by tools. */
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#ifndef FSL_COMPONENT_ID
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#define FSL_COMPONENT_ID "platform.drivers.sema4"
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#endif
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/* The first number write to RSTGDP when reset SEMA4 gate. */
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#define SEMA4_GATE_RESET_PATTERN_1 (0xE2U)
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/* The second number write to RSTGDP when reset SEMA4 gate. */
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#define SEMA4_GATE_RESET_PATTERN_2 (0x1DU)
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/* The first number write to RSTGDP when reset SEMA4 gate IRQ notification. */
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#define SEMA4_GATE_IRQ_RESET_PATTERN_1 (0x47U)
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/* The second number write to RSTGDP when reset SEMA4 gate IRQ notification. */
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#define SEMA4_GATE_IRQ_RESET_PATTERN_2 (0xB8U)
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#define SEMA4_RSTGT_RSTNSM_MASK (0x30U)
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#define SEMA4_RSTNTF_RSTNSM_MASK (0x30U)
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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#if defined(SEMA4_CLOCKS)
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/*!
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* @brief Get instance number for SEMA4 module.
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*
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* @param base SEMA4 peripheral base address.
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*/
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uint32_t SEMA4_GetInstance(SEMA4_Type *base);
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#endif
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/*******************************************************************************
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* Variables
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******************************************************************************/
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#if defined(SEMA4_CLOCKS)
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/*! @brief Pointers to sema4 bases for each instance. */
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static SEMA4_Type *const s_sema4Bases[] = SEMA4_BASE_PTRS;
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#endif
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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#if defined(SEMA4_CLOCKS)
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/*! @brief Pointers to sema4 clocks for each instance. */
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static const clock_ip_name_t s_sema4Clocks[] = SEMA4_CLOCKS;
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#endif
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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/******************************************************************************
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* CODE
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*****************************************************************************/
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#if defined(SEMA4_CLOCKS)
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uint32_t SEMA4_GetInstance(SEMA4_Type *base)
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{
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uint32_t instance;
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/* Find the instance index from base address mappings. */
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for (instance = 0; instance < ARRAY_SIZE(s_sema4Bases); instance++)
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{
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if (s_sema4Bases[instance] == base)
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{
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break;
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}
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}
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assert(instance < ARRAY_SIZE(s_sema4Bases));
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return instance;
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}
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#endif
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/*!
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* brief Initializes the SEMA4 module.
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*
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* This function initializes the SEMA4 module. It only enables the clock but does
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* not reset the gates because the module might be used by other processors
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* at the same time. To reset the gates, call either SEMA4_ResetGate or
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* SEMA4_ResetAllGates function.
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*
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* param base SEMA4 peripheral base address.
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*/
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void SEMA4_Init(SEMA4_Type *base)
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{
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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#if defined(SEMA4_CLOCKS)
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CLOCK_EnableClock(s_sema4Clocks[SEMA4_GetInstance(base)]);
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#endif
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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}
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/*!
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* brief De-initializes the SEMA4 module.
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*
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* This function de-initializes the SEMA4 module. It only disables the clock.
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*
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* param base SEMA4 peripheral base address.
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*/
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void SEMA4_Deinit(SEMA4_Type *base)
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{
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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#if defined(SEMA4_CLOCKS)
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CLOCK_DisableClock(s_sema4Clocks[SEMA4_GetInstance(base)]);
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#endif
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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}
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/*!
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* brief Tries to lock the SEMA4 gate.
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*
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* This function tries to lock the specific SEMA4 gate. If the gate has been
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* locked by another processor, this function returns an error code.
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*
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* param base SEMA4 peripheral base address.
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* param gateNum Gate number to lock.
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* param procNum Current processor number.
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*
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* retval kStatus_Success Lock the sema4 gate successfully.
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* retval kStatus_Fail Sema4 gate has been locked by another processor.
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*/
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status_t SEMA4_TryLock(SEMA4_Type *base, uint8_t gateNum, uint8_t procNum)
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{
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status_t status;
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assert(gateNum < (uint8_t)FSL_FEATURE_SEMA4_GATE_COUNT);
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++procNum;
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/* Try to lock. */
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SEMA4_GATEn(base, gateNum) = procNum;
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/* Check locked or not. */
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if (procNum != SEMA4_GATEn(base, gateNum))
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{
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status = kStatus_Fail;
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}
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else
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{
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status = kStatus_Success;
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}
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return status;
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}
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/*!
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* brief Locks the SEMA4 gate.
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*
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* This function locks the specific SEMA4 gate. If the gate has been
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* locked by other processors, this function waits until it is unlocked and then
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* lock it.
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*
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* param base SEMA4 peripheral base address.
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* param gateNum Gate number to lock.
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* param procNum Current processor number.
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*/
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void SEMA4_Lock(SEMA4_Type *base, uint8_t gateNum, uint8_t procNum)
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{
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assert(gateNum < (uint8_t)FSL_FEATURE_SEMA4_GATE_COUNT);
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++procNum;
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while (procNum != SEMA4_GATEn(base, gateNum))
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{
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/* Wait for unlocked status. */
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while (0U != SEMA4_GATEn(base, gateNum))
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{
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}
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/* Lock the gate. */
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SEMA4_GATEn(base, gateNum) = procNum;
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}
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}
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/*!
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* brief Resets the SEMA4 gate to an unlocked status.
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*
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* This function resets a SEMA4 gate to an unlocked status.
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*
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* param base SEMA4 peripheral base address.
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* param gateNum Gate number.
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*
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* retval kStatus_Success SEMA4 gate is reset successfully.
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* retval kStatus_Fail Some other reset process is ongoing.
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*/
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status_t SEMA4_ResetGate(SEMA4_Type *base, uint8_t gateNum)
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{
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status_t status;
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/*
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* Reset all gates if gateNum >= SEMA4_GATE_NUM_RESET_ALL
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* Reset specific gate if gateNum < FSL_FEATURE_SEMA4_GATE_COUNT
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*/
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assert(!((gateNum < SEMA4_GATE_NUM_RESET_ALL) && (gateNum >= (uint8_t)FSL_FEATURE_SEMA4_GATE_COUNT)));
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/* Check whether some reset is ongoing. */
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if (0U != (base->RSTGT & SEMA4_RSTGT_RSTNSM_MASK))
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{
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status = kStatus_Fail;
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}
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else
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{
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/* First step. */
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base->RSTGT = SEMA4_RSTGT_RSTGSM_RSTGMS_RSTGDP(SEMA4_GATE_RESET_PATTERN_1);
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/* Second step. */
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base->RSTGT = SEMA4_RSTGT_RSTGSM_RSTGMS_RSTGDP(SEMA4_GATE_RESET_PATTERN_2) | SEMA4_RSTGT_RSTGTN(gateNum);
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status = kStatus_Success;
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}
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return status;
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}
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/*!
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* brief Resets the SEMA4 gate IRQ notification.
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*
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* This function resets a SEMA4 gate IRQ notification.
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*
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* param base SEMA4 peripheral base address.
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* param gateNum Gate number.
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*
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* retval kStatus_Success Reset successfully.
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* retval kStatus_Fail Some other reset process is ongoing.
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*/
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status_t SEMA4_ResetGateNotify(SEMA4_Type *base, uint8_t gateNum)
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{
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status_t status;
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/*
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* Reset all gates if gateNum >= SEMA4_GATE_NUM_RESET_ALL
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* Reset specific gate if gateNum < FSL_FEATURE_SEMA4_GATE_COUNT
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*/
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assert(!((gateNum < (uint8_t)SEMA4_GATE_NUM_RESET_ALL) && (gateNum >= (uint8_t)FSL_FEATURE_SEMA4_GATE_COUNT)));
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/* Check whether some reset is ongoing. */
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if (0U != (base->RSTNTF & SEMA4_RSTNTF_RSTNSM_MASK))
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{
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status = kStatus_Fail;
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}
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else
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{
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/* First step. */
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base->RSTNTF = SEMA4_RSTNTF_RSTNSM_RSTNMS_RSTNDP(SEMA4_GATE_IRQ_RESET_PATTERN_1);
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/* Second step. */
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base->RSTNTF = SEMA4_RSTNTF_RSTNSM_RSTNMS_RSTNDP(SEMA4_GATE_IRQ_RESET_PATTERN_2) | SEMA4_RSTNTF_RSTNTN(gateNum);
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status = kStatus_Success;
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}
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return status;
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}
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