1 /* 2 * Copyright (c) 2019, NXP 3 * SPDX-License-Identifier: Apache-2.0 4 */ 5 6 #include <zephyr/init.h> 7 #include <zephyr/devicetree.h> 8 #include <fsl_common.h> 9 #include <soc.h> 10 board_early_init_hook(void)11void board_early_init_hook(void) 12 { 13 14 #if (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm6), nxp_lpc_i2s, okay)) && \ 15 (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm7), nxp_lpc_i2s, okay)) && \ 16 CONFIG_I2S 17 /* 18 * Flexcomm 6 and 7 are connected to codec on board, and shared signal 19 * sets are used to enable one I2S device to handle RX and one to handle 20 * TX 21 */ 22 CLOCK_EnableClock(kCLOCK_Sysctl); 23 /* Set shared signal set 0 SCK, WS from Transmit I2S - Flexcomm 7 */ 24 SYSCTL->SHAREDCTRLSET[0] = SYSCTL_SHAREDCTRLSET_SHAREDSCKSEL(7) | 25 SYSCTL_SHAREDCTRLSET_SHAREDWSSEL(7); 26 27 #ifdef CONFIG_I2S_TEST_SEPARATE_DEVICES 28 /* Select Data in from Transmit I2S - Flexcomm 7 */ 29 SYSCTL->SHAREDCTRLSET[0] |= SYSCTL_SHAREDCTRLSET_SHAREDDATASEL(7); 30 /* Enable Transmit I2S - Flexcomm 7 for Shared Data Out */ 31 SYSCTL->SHAREDCTRLSET[0] |= SYSCTL_SHAREDCTRLSET_FC7DATAOUTEN(1); 32 #endif 33 34 /* Set Receive I2S - Flexcomm 6 SCK, WS from shared signal set 0 */ 35 SYSCTL->FCCTRLSEL[6] = SYSCTL_FCCTRLSEL_SCKINSEL(1) | 36 SYSCTL_FCCTRLSEL_WSINSEL(1); 37 38 /* Set Transmit I2S - Flexcomm 7 SCK, WS from shared signal set 0 */ 39 SYSCTL->FCCTRLSEL[7] = SYSCTL_FCCTRLSEL_SCKINSEL(1) | 40 SYSCTL_FCCTRLSEL_WSINSEL(1); 41 42 #ifdef CONFIG_I2S_TEST_SEPARATE_DEVICES 43 /* Select Receive I2S - Flexcomm 6 Data in from shared signal set 0 */ 44 SYSCTL->FCCTRLSEL[6] |= SYSCTL_FCCTRLSEL_DATAINSEL(1); 45 /* Select Transmit I2S - Flexcomm 7 Data out to shared signal set 0 */ 46 SYSCTL->FCCTRLSEL[7] |= SYSCTL_FCCTRLSEL_DATAOUTSEL(1); 47 #endif 48 49 #endif 50 } 51
