1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2010-2013, NVIDIA CORPORATION. All rights reserved.
4 */
5
6 /* Tegra114 high-level function multiplexing */
7
8 #include <common.h>
9 #include <asm/arch/clock.h>
10 #include <asm/arch/funcmux.h>
11 #include <asm/arch/pinmux.h>
12
funcmux_select(enum periph_id id,int config)13 int funcmux_select(enum periph_id id, int config)
14 {
15 int bad_config = config != FUNCMUX_DEFAULT;
16
17 switch (id) {
18 case PERIPH_ID_UART4:
19 switch (config) {
20 case FUNCMUX_UART4_GMI:
21 pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
22 PMUX_FUNC_UARTD);
23 pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
24 PMUX_FUNC_UARTD);
25 pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
26 PMUX_FUNC_UARTD);
27 pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
28 PMUX_FUNC_UARTD);
29
30 pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
31 pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
32 pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
33 pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
34
35 pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
36 pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
37 pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
38 pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
39 break;
40 }
41 break;
42
43 /* Add other periph IDs here as needed */
44
45 default:
46 debug("%s: invalid periph_id %d", __func__, id);
47 return -1;
48 }
49
50 if (bad_config) {
51 debug("%s: invalid config %d for periph_id %d", __func__,
52 config, id);
53 return -1;
54 }
55 return 0;
56 }
57