1 // Copyright 2024 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include "clock_config.h"
16
17 #include "board.h"
18 #include "fsl_clock.h"
19 #include "fsl_power.h"
20
21 const clock_sys_pll_config_t g_sysPllConfig_BOARD_BootClockRUN = {
22 .sys_pll_src = kCLOCK_SysPllXtalIn,
23 .numerator = 0,
24 .denominator = 1,
25 .sys_pll_mult = kCLOCK_SysPllMult22};
26
BOARD_InitBootClocks(void)27 void BOARD_InitBootClocks(void) {
28 POWER_DisablePD(kPDRUNCFG_PD_LPOSC);
29 CLOCK_EnableLpOscClk();
30
31 POWER_DisablePD(kPDRUNCFG_PD_FFRO);
32 CLOCK_EnableFroClk(kCLOCK_FroAllOutEn);
33
34 BOARD_SetFlexspiClock(FLEXSPI0, 3U, 2U);
35
36 CLOCK_SetClkDiv(kCLOCK_DivSysCpuAhbClk, 2);
37 CLOCK_AttachClk(kFRO_DIV1_to_MAIN_CLK);
38
39 POWER_DisablePD(kPDRUNCFG_PD_SYSXTAL);
40 POWER_UpdateOscSettlingTime(BOARD_SYSOSC_SETTLING_US);
41 CLOCK_EnableSysOscClk(true, true, BOARD_SYSOSC_SETTLING_US);
42 CLOCK_SetXtalFreq(BOARD_XTAL_SYS_CLK_HZ);
43
44 CLOCK_InitSysPll(&g_sysPllConfig_BOARD_BootClockRUN);
45 CLOCK_InitSysPfd(kCLOCK_Pfd0, 24);
46 CLOCK_InitSysPfd(kCLOCK_Pfd2, 24);
47
48 CLOCK_SetClkDiv(kCLOCK_DivSysCpuAhbClk, 2U);
49
50 CLOCK_AttachClk(kMAIN_PLL_to_MAIN_CLK);
51 CLOCK_AttachClk(kMAIN_CLK_DIV_to_SYSTICK_CLK);
52 CLOCK_AttachClk(kFRO_DIV2_to_CLKOUT);
53
54 CLOCK_SetClkDiv(kCLOCK_DivPLLFRGClk, 11U);
55 CLOCK_SetClkDiv(kCLOCK_DivSystickClk, 2U);
56 CLOCK_SetClkDiv(kCLOCK_DivPfc0Clk, 2U);
57 CLOCK_SetClkDiv(kCLOCK_DivPfc1Clk, 4U);
58 CLOCK_SetClkDiv(kCLOCK_DivClockOut, 100U);
59
60 SystemCoreClock = BOARD_BOOTCLOCKRUN_CORE_CLOCK;
61
62 POWER_SetDeepSleepClock(kDeepSleepClk_Fro);
63 }
64