1 /*
2 * Copyright (c) 2020, NXP
3 * SPDX-License-Identifier: Apache-2.0
4 */
5
6 #include <zephyr/init.h>
7 #include <zephyr/devicetree.h>
8 #include <fsl_device_registers.h>
9
mimxrt685_evk_init(void)10 static int mimxrt685_evk_init(void)
11 {
12
13 /* flexcomm1 and flexcomm3 are configured to loopback the TX signal to RX */
14 #if (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm1), nxp_lpc_i2s, okay)) && \
15 (DT_NODE_HAS_COMPAT_STATUS(DT_NODELABEL(flexcomm3), nxp_lpc_i2s, okay)) && \
16 CONFIG_I2S
17
18 /* Set shared signal set 0 SCK, WS from Transmit I2S - Flexcomm3 */
19 SYSCTL1->SHAREDCTRLSET[0] = SYSCTL1_SHAREDCTRLSET_SHAREDSCKSEL(3) |
20 SYSCTL1_SHAREDCTRLSET_SHAREDWSSEL(3);
21
22 #ifdef CONFIG_I2S_TEST_SEPARATE_DEVICES
23 /* Select Data in from Transmit I2S - Flexcomm 3 */
24 SYSCTL1->SHAREDCTRLSET[0] |= SYSCTL1_SHAREDCTRLSET_SHAREDDATASEL(3);
25 /* Enable Transmit I2S - Flexcomm 3 for Shared Data Out */
26 SYSCTL1->SHAREDCTRLSET[0] |= SYSCTL1_SHAREDCTRLSET_FC3DATAOUTEN(1);
27 #endif
28
29 /* Set Receive I2S - Flexcomm 1 SCK, WS from shared signal set 0 */
30 SYSCTL1->FCCTRLSEL[1] = SYSCTL1_FCCTRLSEL_SCKINSEL(1) |
31 SYSCTL1_FCCTRLSEL_WSINSEL(1);
32
33 /* Set Transmit I2S - Flexcomm 3 SCK, WS from shared signal set 0 */
34 SYSCTL1->FCCTRLSEL[3] = SYSCTL1_FCCTRLSEL_SCKINSEL(1) |
35 SYSCTL1_FCCTRLSEL_WSINSEL(1);
36
37 #ifdef CONFIG_I2S_TEST_SEPARATE_DEVICES
38 /* Select Receive I2S - Flexcomm 1 Data in from shared signal set 0 */
39 SYSCTL1->FCCTRLSEL[1] |= SYSCTL1_FCCTRLSEL_DATAINSEL(1);
40 /* Select Transmit I2S - Flexcomm 3 Data out to shared signal set 0 */
41 SYSCTL1->FCCTRLSEL[3] |= SYSCTL1_FCCTRLSEL_DATAOUTSEL(1);
42 #endif
43
44 #endif
45
46 #ifdef CONFIG_REBOOT
47 /*
48 * The sys_reboot API calls NVIC_SystemReset. On the RT685, the warm
49 * reset will not complete correctly unless the ROM toggles the
50 * flash reset pin. We can control this behavior using the OTP shadow
51 * register for OPT word BOOT_CFG1
52 *
53 * Set FLEXSPI_RESET_PIN_ENABLE=1, FLEXSPI_RESET_PIN= PIO2_12
54 */
55 OCOTP->OTP_SHADOW[97] = 0x314000;
56 #endif /* CONFIG_REBOOT */
57
58 return 0;
59 }
60
61 SYS_INIT(mimxrt685_evk_init, PRE_KERNEL_1, CONFIG_BOARD_INIT_PRIORITY);
62
