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
  14 int 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 }