board/omap3/common/power.c

   1 /*
   2  * (C) Copyright 2004-2008
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Author :
   6  *      Sunil Kumar <sunilsaini05@gmail.com>
   7  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
   8  *
   9  * Derived from Beagle Board and 3430 SDP code by
  10  *      Richard Woodruff <r-woodruff2@ti.com>
  11  *      Syed Mohammed Khasim <khasim@ti.com>
  12  *
  13  *
  14  * See file CREDITS for list of people who contributed to this
  15  * project.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  */
  32 #include <common.h>
  33 #include <asm/arch/sys_proto.h>
  34 #include <i2c.h>
  35
  36 /******************************************************************************
  37  * Routine: power_init_r
  38  * Description: Configure power supply
  39  *****************************************************************************/
  40 void power_init_r(void)
  41 {
  42         unsigned char byte;
  43
  44 #ifdef CONFIG_DRIVER_OMAP34XX_I2C
  45         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
  46 #endif
  47
  48         /*
  49          * Configure OMAP3 supply voltages in power management
  50          * companion chip.
  51          */
  52
  53         /* set VAUX3 to 2.8V */
  54         byte = DEV_GRP_P1;
  55         i2c_write(PWRMGT_ADDR_ID4, VAUX3_DEV_GRP, 1, &byte, 1);
  56         byte = VAUX3_VSEL_28;
  57         i2c_write(PWRMGT_ADDR_ID4, VAUX3_DEDICATED, 1, &byte, 1);
  58
  59         /* set VPLL2 to 1.8V */
  60         byte = DEV_GRP_ALL;
  61         i2c_write(PWRMGT_ADDR_ID4, VPLL2_DEV_GRP, 1, &byte, 1);
  62         byte = VPLL2_VSEL_18;
  63         i2c_write(PWRMGT_ADDR_ID4, VPLL2_DEDICATED, 1, &byte, 1);
  64
  65         /* set VDAC to 1.8V */
  66         byte = DEV_GRP_P1;
  67         i2c_write(PWRMGT_ADDR_ID4, VDAC_DEV_GRP, 1, &byte, 1);
  68         byte = VDAC_VSEL_18;
  69         i2c_write(PWRMGT_ADDR_ID4, VDAC_DEDICATED, 1, &byte, 1);
  70
  71         /* enable LED */
  72         byte = LEDBPWM | LEDAPWM | LEDBON | LEDAON;
  73         i2c_write(PWRMGT_ADDR_ID3, LEDEN, 1, &byte, 1);
  74 }