text: /*
   *  (C) Copyright 2010-2013
   *  NVIDIA Corporation <www.nvidia.com>
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  #include <common.h>
  #include <asm/arch/pinmux.h>
  #include <asm/arch/gp_padctrl.h>
  #include "pinmux-config-cardhu.h"
  #include <i2c.h>
  
  #define PMU_I2C_ADDRESS		0x2D
  #define MAX_I2C_RETRY		3
  
  /*
   * Routine: pinmux_init
   * Description: Do individual peripheral pinmux configs
   */
  void pinmux_init(void)
  {
  	pinmux_config_table(tegra3_pinmux_common,
  		ARRAY_SIZE(tegra3_pinmux_common));
  
  	pinmux_config_table(unused_pins_lowpower,
  		ARRAY_SIZE(unused_pins_lowpower));
  
  	/* Initialize any non-default pad configs (APB_MISC_GP regs) */
  	padgrp_config_table(cardhu_padctrl, ARRAY_SIZE(cardhu_padctrl));
  }
  
  #if defined(CONFIG_TEGRA_MMC)
  /*
   * Do I2C/PMU writes to bring up SD card bus power
   *
   */
  void board_sdmmc_voltage_init(void)
  {
  	uchar reg, data_buffer[1];
  	int i;
  
  	i2c_set_bus_num(0);	/* PMU is on bus 0 */
  
  	/* TPS659110: LDO5_REG = 3.3v, ACTIVE to SDMMC1 */
  	data_buffer[0] = 0x65;
  	reg = 0x32;
  
  	for (i = 0; i < MAX_I2C_RETRY; ++i) {
  		if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
  			udelay(100);
  	}
  
  	/* TPS659110: GPIO7_REG = PDEN, output a 1 to EN_3V3_SYS */
  	data_buffer[0] = 0x09;
  	reg = 0x67;
  
  	for (i = 0; i < MAX_I2C_RETRY; ++i) {
  		if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
  			udelay(100);
  	}
  }
  
  /*
   * Routine: pin_mux_mmc
   * Description: setup the MMC muxes, power rails, etc.
   */
  void pin_mux_mmc(void)
  {
  	/*
  	 * NOTE: We don't do mmc-specific pin muxes here.
  	 * They were done globally in pinmux_init().
  	 */
  
  	/* Bring up the SDIO1 power rail */
  	board_sdmmc_voltage_init();
  }
  #endif	/* MMC */
  