arch/arm/mach-tegra/board-harmony-pcie.c

   1 /*
   2  * arch/arm/mach-tegra/board-harmony-pcie.c
   3  *
   4  * Copyright (C) 2010 CompuLab, Ltd.
   5  * Mike Rapoport <mike@compulab.co.il>
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/gpio.h>
  20 #include <linux/err.h>
  21 #include <linux/regulator/consumer.h>
  22
  23 #include <asm/mach-types.h>
  24
  25 #include <mach/pinmux.h>
  26 #include "board.h"
  27
  28 #ifdef CONFIG_TEGRA_PCI
  29
  30 static int __init harmony_pcie_init(void)
  31 {
  32         int err;
  33
  34         if (!machine_is_harmony())
  35                 return 0;
  36
  37         tegra_pinmux_set_tristate(TEGRA_PINGROUP_GPV, TEGRA_TRI_NORMAL);
  38         tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXA, TEGRA_TRI_NORMAL);
  39         tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXK, TEGRA_TRI_NORMAL);
  40
  41         err = tegra_pcie_init(true, true);
  42         if (err)
  43                 goto err_pcie;
  44
  45         return 0;
  46
  47 err_pcie:
  48         tegra_pinmux_set_tristate(TEGRA_PINGROUP_GPV, TEGRA_TRI_TRISTATE);
  49         tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXA, TEGRA_TRI_TRISTATE);
  50         tegra_pinmux_set_tristate(TEGRA_PINGROUP_SLXK, TEGRA_TRI_TRISTATE);
  51
  52         return err;
  53 }
  54
  55 subsys_initcall(harmony_pcie_init);
  56
  57 #endif