/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * o Redistributions of source code must retain the above copyright notice, this list * of conditions and the following disclaimer. * * o Redistributions in binary form must reproduce the above copyright notice, this * list of conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. * * o Neither the name of Freescale Semiconductor, Inc. nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "fsl_common.h" #include "fsl_smc.h" #include "fsl_clock_config.h" /******************************************************************************* * Definitions ******************************************************************************/ /*! @brief Clock configuration structure. */ typedef struct _clock_config { mcglite_config_t mcgliteConfig; /*!< MCG configuration. */ sim_clock_config_t simConfig; /*!< SIM configuration. */ osc_config_t oscConfig; /*!< OSC configuration. */ uint32_t coreClock; /*!< core clock frequency. */ } clock_config_t; /******************************************************************************* * Variables ******************************************************************************/ /* System clock frequency. */ extern uint32_t SystemCoreClock; /* Configuration for enter VLPR mode. Core clock = 2MHz. */ const clock_config_t g_defaultClockConfigVlpr = { .mcgliteConfig = { .outSrc = kMCGLITE_ClkSrcLirc, .irclkEnableMode = kMCGLITE_IrclkEnable, .ircs = kMCGLITE_Lirc2M, .fcrdiv = kMCGLITE_LircDivBy1, .lircDiv2 = kMCGLITE_LircDivBy1, .hircEnableInNotHircMode = false, }, .simConfig = { .clkdiv1 = 0x00010000U, /* SIM_CLKDIV1. */ }, .oscConfig = {.freq = BOARD_XTAL0_CLK_HZ, .capLoad = 0U, .workMode = kOSC_ModeOscLowPower, .oscerConfig = { .enableMode = kOSC_ErClkEnable, #if (defined(FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) && FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) .erclkDiv = 0U, #endif }}, .coreClock = 2000000U, /* Core clock frequency */ }; /* Configuration for enter RUN mode. Core clock = 48000000Hz. */ const clock_config_t g_defaultClockConfigRun = { .mcgliteConfig = { .outSrc = kMCGLITE_ClkSrcHirc, .irclkEnableMode = kMCGLITE_IrclkEnable, .ircs = kMCGLITE_Lirc8M, .fcrdiv = kMCGLITE_LircDivBy1, .lircDiv2 = kMCGLITE_LircDivBy1, .hircEnableInNotHircMode = true, }, .simConfig = { .clkdiv1 = 0x00010000U, /* SIM_CLKDIV1. */ }, .oscConfig = {.freq = BOARD_XTAL0_CLK_HZ, .capLoad = 0U, .workMode = kOSC_ModeOscLowPower, .oscerConfig = { .enableMode = kOSC_ErClkEnable, #if (defined(FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) && FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) .erclkDiv = 0U, #endif }}, .coreClock = 48000000U, /* Core clock frequency */ }; /******************************************************************************* * Code ******************************************************************************/ /* * How to setup clock using clock driver functions: * * 1. CLOCK_SetSimSafeDivs, to make sure core clock, bus clock, flexbus clock * and flash clock are in allowed range during clock mode switch. * * 2. Call CLOCK_SetMcgliteConfig to set MCG_Lite configuration. * * 3. Call CLOCK_SetSimConfig to set the clock configuration in SIM. */ void BOARD_BootClockVLPR(void) { CLOCK_SetSimSafeDivs(); CLOCK_SetMcgliteConfig(&g_defaultClockConfigVlpr.mcgliteConfig); CLOCK_SetSimConfig(&g_defaultClockConfigVlpr.simConfig); SystemCoreClock = g_defaultClockConfigVlpr.coreClock; SMC_SetPowerModeProtection(SMC, kSMC_AllowPowerModeAll); SMC_SetPowerModeVlpr(SMC); while (SMC_GetPowerModeState(SMC) != kSMC_PowerStateVlpr) { } } void BOARD_BootClockRUN(void) { CLOCK_SetSimSafeDivs(); CLOCK_SetMcgliteConfig(&g_defaultClockConfigRun.mcgliteConfig); CLOCK_SetSimConfig(&g_defaultClockConfigRun.simConfig); SystemCoreClock = g_defaultClockConfigRun.coreClock; }