drivers/power/twl4030.c

   1 /*
   2  * Copyright (c) 2009 Wind River Systems, Inc.
   3  * Tom Rix <Tom.Rix at windriver.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18  * MA 02111-1307 USA
  19  *
  20  * Derived from code on omapzoom, git://git.omapzoom.com/repo/u-boot.git
  21  *
  22  * Copyright (C) 2007-2009 Texas Instruments, Inc.
  23  */
  24
  25 #include <twl4030.h>
  26
  27 /*
  28  * Power Reset
  29  */
  30 void twl4030_power_reset_init(void)
  31 {
  32         u8 val = 0;
  33         if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, &val,
  34                                 TWL4030_PM_MASTER_P1_SW_EVENTS)) {
  35                 printf("Error:TWL4030: failed to read the power register\n");
  36                 printf("Could not initialize hardware reset\n");
  37         } else {
  38                 val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
  39                 if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, val,
  40                                          TWL4030_PM_MASTER_P1_SW_EVENTS)) {
  41                         printf("Error:TWL4030: failed to write the power register\n");
  42                         printf("Could not initialize hardware reset\n");
  43                 }
  44         }
  45 }
  46
  47