drivers/power/palmas.c

   1 /*
   2  * (C) Copyright 2012-2013
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23 #include <config.h>
  24 #include <palmas.h>
  25
  26 /* Functions to read and write from TWL6030 */
  27 int twl6035_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
  28 {
  29         return i2c_write(chip_no, reg, 1, &val, 1);
  30 }
  31
  32 int twl6035_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
  33 {
  34         return i2c_read(chip_no, reg, 1, val, 1);
  35 }
  36
  37 /* To align with i2c mw/mr address, reg, val command syntax */
  38 static inline int palmas_write_u8(u8 chip_no, u8 reg, u8 val)
  39 {
  40         return i2c_write(chip_no, reg, 1, &val, 1);
  41 }
  42
  43 static inline int palmas_read_u8(u8 chip_no, u8 reg, u8 *val)
  44 {
  45         return i2c_read(chip_no, reg, 1, val, 1);
  46 }
  47
  48 void palmas_init_settings(void)
  49 {
  50         return;
  51 }
  52
  53 int twl6035_mmc1_poweron_ldo(void)
  54 {
  55         u8 val = 0;
  56
  57         /* set LDO9 TWL6035 to 3V */
  58         val = 0x2b; /* (3 -.9)*28 +1 */
  59
  60         if (palmas_write_u8(0x48, LDO9_VOLTAGE, val)) {
  61                 printf("twl6035: could not set LDO9 voltage.\n");
  62                 return 1;
  63         }
  64
  65         /* TURN ON LDO9 */
  66         val = LDO_ON | LDO_MODE_SLEEP | LDO_MODE_ACTIVE;
  67
  68         if (palmas_write_u8(0x48, LDO9_CTRL, val)) {
  69                 printf("twl6035: could not turn on LDO9.\n");
  70                 return 1;
  71         }
  72
  73         return 0;
  74 }