arch/arm/mach-tegra/tegra30/funcmux.c

   1 /*
   2  * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 /* Tegra30 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_UART1:
  20                 switch (config) {
  21                 case FUNCMUX_UART1_ULPI:
  22                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA0_PO1,
  23                                         PMUX_FUNC_UARTA);
  24                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA1_PO2,
  25                                         PMUX_FUNC_UARTA);
  26                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA2_PO3,
  27                                         PMUX_FUNC_UARTA);
  28                         pinmux_set_func(PMUX_PINGRP_ULPI_DATA3_PO4,
  29                                         PMUX_FUNC_UARTA);
  30                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA0_PO1);
  31                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA1_PO2);
  32                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA2_PO3);
  33                         pinmux_tristate_disable(PMUX_PINGRP_ULPI_DATA3_PO4);
  34                         break;
  35                 }
  36                 break;
  37
  38         /* Add other periph IDs here as needed */
  39
  40         default:
  41                 debug("%s: invalid periph_id %d", __func__, id);
  42                 return -1;
  43         }
  44
  45         if (bad_config) {
  46                 debug("%s: invalid config %d for periph_id %d", __func__,
  47                       config, id);
  48                 return -1;
  49         }
  50         return 0;
  51 }