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/*
* Copyright (c) 2016, Freescale Semiconductor, Inc.
* Copyright 2016, NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_common.h"
#include "fsl_reset.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.reset"
#endif
/*******************************************************************************
* Variables
******************************************************************************/
/*******************************************************************************
* Prototypes
******************************************************************************/
/*******************************************************************************
* Code
******************************************************************************/
#if (defined(FSL_FEATURE_SOC_SYSCON_COUNT) && (FSL_FEATURE_SOC_SYSCON_COUNT > 0))
/*!
* brief Assert reset to peripheral.
*
* Asserts reset signal to specified peripheral module.
*
* param peripheral Assert reset to this peripheral. The enum argument contains encoding of reset register
* and reset bit position in the reset register.
*/
void RESET_SetPeripheralReset(reset_ip_name_t peripheral)
{
const uint32_t regIndex = ((uint32_t)peripheral & 0xFFFF0000u) >> 16;
const uint32_t bitPos = ((uint32_t)peripheral & 0x0000FFFFu);
const uint32_t bitMask = 1UL << bitPos;
assert(bitPos < 32u);
/* reset register is in SYSCON */
/* set bit */
SYSCON->PRESETCTRLSET[regIndex] = bitMask;
/* wait until it reads 0b1 */
while (0u == (SYSCON->PRESETCTRLX[regIndex] & bitMask))
{
}
}
/*!
* brief Clear reset to peripheral.
*
* Clears reset signal to specified peripheral module, allows it to operate.
*
* param peripheral Clear reset to this peripheral. The enum argument contains encoding of reset register
* and reset bit position in the reset register.
*/
void RESET_ClearPeripheralReset(reset_ip_name_t peripheral)
{
const uint32_t regIndex = ((uint32_t)peripheral & 0xFFFF0000u) >> 16;
const uint32_t bitPos = ((uint32_t)peripheral & 0x0000FFFFu);
const uint32_t bitMask = 1UL << bitPos;
assert(bitPos < 32u);
/* reset register is in SYSCON */
/* clear bit */
SYSCON->PRESETCTRLCLR[regIndex] = bitMask;
/* wait until it reads 0b0 */
while (bitMask == (SYSCON->PRESETCTRLX[regIndex] & bitMask))
{
}
}
/*!
* brief Reset peripheral module.
*
* Reset peripheral module.
*
* param peripheral Peripheral to reset. The enum argument contains encoding of reset register
* and reset bit position in the reset register.
*/
void RESET_PeripheralReset(reset_ip_name_t peripheral)
{
RESET_SetPeripheralReset(peripheral);
RESET_ClearPeripheralReset(peripheral);
}
#endif /* FSL_FEATURE_SOC_SYSCON_COUNT || FSL_FEATURE_SOC_ASYNC_SYSCON_COUNT */
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