diff options
Diffstat (limited to 'examples/imx7d_sdb_m4/board.c')
| -rw-r--r-- | examples/imx7d_sdb_m4/board.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/examples/imx7d_sdb_m4/board.c b/examples/imx7d_sdb_m4/board.c index 5ce8c78..152817c 100644 --- a/examples/imx7d_sdb_m4/board.c +++ b/examples/imx7d_sdb_m4/board.c @@ -42,13 +42,19 @@ void BOARD_ClockInit(void) { /* OSC/PLL is already initialized by Cortex-A7 (u-boot) */ - /* Disable WDOG3 */ + /* + * Disable WDOG3 + * Note : The WDOG clock Root is shared by all the 4 WDOGs, so FreeROTS + * code should avoid closing it + */ CCM_UpdateRoot(CCM, ccmRootWdog, ccmRootmuxWdogOsc24m, 0, 0); CCM_EnableRoot(CCM, ccmRootWdog); CCM_ControlGate(CCM, ccmCcgrGateWdog3, ccmClockNeededRun); + + RDC_SetPdapAccess(RDC, BOARD_WDOG_RDC_PDAP, 3 << (BOARD_DOMAIN_ID * 2), false, false); WDOG_DisablePowerdown(BOARD_WDOG_BASEADDR); + CCM_ControlGate(CCM, ccmCcgrGateWdog3, ccmClockNotNeeded); - CCM_DisableRoot(CCM, ccmRootWdog); /* We need system PLL Div2 to run M4 core */ CCM_ControlGate(CCM, ccmPllGateSys, ccmClockNeededRun); @@ -75,7 +81,12 @@ void dbg_uart_init(void) CCM_UpdateRoot(CCM, BOARD_DEBUG_UART_CCM_ROOT, ccmRootmuxUartOsc24m, 0, 0); /* Enable debug uart clock */ CCM_EnableRoot(CCM, BOARD_DEBUG_UART_CCM_ROOT); - CCM_ControlGate(CCM, BOARD_DEBUG_UART_CCM_CCGR, ccmClockNeededRunWait); + /* + * IC Limitation + * M4 stop will cause A7 UART lose functionality + * So we need UART clock all the time + */ + CCM_ControlGate(CCM, BOARD_DEBUG_UART_CCM_CCGR, ccmClockNeededAll); /* Config debug uart pins */ configure_uart_pins(BOARD_DEBUG_UART_BASEADDR); |