| /* |
| * Copyright (c) 2017, NXP |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <init.h> |
| #include <soc.h> |
| #include "wdog_imx.h" |
| |
| /* Initialize clock. */ |
| void SOC_ClockInit(void) |
| { |
| /* OSC/PLL is already initialized by Cortex-A7 (u-boot) */ |
| |
| /* |
| * Disable WDOG3 |
| * Note : The WDOG clock Root is shared by all the 4 WDOGs, |
| * so Zephyr code should avoid closing it |
| */ |
| CCM_UpdateRoot(CCM, ccmRootWdog, ccmRootmuxWdogOsc24m, 0, 0); |
| CCM_EnableRoot(CCM, ccmRootWdog); |
| CCM_ControlGate(CCM, ccmCcgrGateWdog3, ccmClockNeededRun); |
| |
| RDC_SetPdapAccess(RDC, rdcPdapWdog3, |
| RDC_DOMAIN_PERM(CONFIG_DOMAIN_ID, RDC_DOMAIN_PERM_RW), |
| false, false); |
| |
| WDOG_DisablePowerdown(WDOG3); |
| |
| CCM_ControlGate(CCM, ccmCcgrGateWdog3, ccmClockNotNeeded); |
| |
| /* We need system PLL Div2 to run M4 core */ |
| CCM_ControlGate(CCM, ccmPllGateSys, ccmClockNeededRun); |
| CCM_ControlGate(CCM, ccmPllGateSysDiv2, ccmClockNeededRun); |
| |
| /* Enable clock gate for IP bridge and IO mux */ |
| CCM_ControlGate(CCM, ccmCcgrGateIpmux1, ccmClockNeededRun); |
| CCM_ControlGate(CCM, ccmCcgrGateIpmux2, ccmClockNeededRun); |
| CCM_ControlGate(CCM, ccmCcgrGateIpmux3, ccmClockNeededRun); |
| CCM_ControlGate(CCM, ccmCcgrGateIomux, ccmClockNeededRun); |
| CCM_ControlGate(CCM, ccmCcgrGateIomuxLpsr, ccmClockNeededRun); |
| |
| /* Enable clock gate for RDC */ |
| CCM_ControlGate(CCM, ccmCcgrGateRdc, ccmClockNeededRun); |
| } |
| |
| void SOC_RdcInit(void) |
| { |
| /* Move M4 core to specific RDC domain */ |
| RDC_SetDomainID(RDC, rdcMdaM4, CONFIG_DOMAIN_ID, false); |
| } |
| |
| #ifdef CONFIG_UART_IMX |
| static void nxp_mcimx7_uart_config(void) |
| { |
| |
| #ifdef CONFIG_UART_IMX_UART_2 |
| /* We need to grasp board uart exclusively */ |
| RDC_SetPdapAccess(RDC, rdcPdapUart2, |
| RDC_DOMAIN_PERM(CONFIG_DOMAIN_ID, RDC_DOMAIN_PERM_RW), |
| false, false); |
| /* Select clock derived from OSC clock(24M) */ |
| CCM_UpdateRoot(CCM, ccmRootUart2, ccmRootmuxUartOsc24m, 0, 0); |
| /* Enable uart clock */ |
| CCM_EnableRoot(CCM, ccmRootUart2); |
| /* |
| * IC Limitation |
| * M4 stop will cause A7 UART lose functionality |
| * So we need UART clock all the time |
| */ |
| CCM_ControlGate(CCM, ccmCcgrGateUart2, ccmClockNeededAll); |
| #endif /* #ifdef CONFIG_UART_IMX_UART_2 */ |
| |
| } |
| #endif /* CONFIG_UART_IMX */ |
| |
| static int nxp_mcimx7_init(struct device *arg) |
| { |
| ARG_UNUSED(arg); |
| |
| /* SoC specific RDC settings */ |
| SOC_RdcInit(); |
| |
| /* BoC specific clock settings */ |
| SOC_ClockInit(); |
| |
| #ifdef CONFIG_UART_IMX |
| nxp_mcimx7_uart_config(); |
| #endif /* CONFIG_UART_IMX */ |
| |
| return 0; |
| } |
| |
| SYS_INIT(nxp_mcimx7_init, PRE_KERNEL_1, 0); |