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

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