git.sur5r.net Git - u-boot/blob - arch/arm/mach-tegra/tegra114/funcmux.c

   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
  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 }