/* | |
* Copyright (c) 2016, Freescale Semiconductor, Inc. | |
* Copyright (c) 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 = 1u << 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 = 1u << 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 */ |