LXR uboot/arch/arm/mach-tegra/tegra114/funcmux.c

   1/*
   2 * Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0
   5 */
   6
   7/* Tegra114 high-level function multiplexing */
   8
   9#include <common.h>
  10#include <asm/arch/clock.h>
  11#include <asm/arch/funcmux.h>
  12#include <asm/arch/pinmux.h>
  13
  14int funcmux_select(enum periph_id id, int config)
  15{
  16        int bad_config = config != FUNCMUX_DEFAULT;
  17
  18        switch (id) {
  19        case PERIPH_ID_UART4:
  20                switch (config) {
  21                case FUNCMUX_UART4_GMI:
  22                        pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
  23                                        PMUX_FUNC_UARTD);
  24                        pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
  25                                        PMUX_FUNC_UARTD);
  26                        pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
  27                                        PMUX_FUNC_UARTD);
  28                        pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
  29                                        PMUX_FUNC_UARTD);
  30
  31                        pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
  32                        pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
  33                        pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
  34                        pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
  35
  36                        pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
  37                        pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
  38                        pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
  39                        pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
  40                        break;
  41                }
  42                break;
  43
  44        /* Add other periph IDs here as needed */
  45
  46        default:
  47                debug("%s: invalid periph_id %d", __func__, id);
  48                return -1;
  49        }
  50
  51        if (bad_config) {
  52                debug("%s: invalid config %d for periph_id %d", __func__,
  53                      config, id);
  54                return -1;
  55        }
  56        return 0;
  57}
  58