drivers/power/twl6030.c

   1 /*
   2  * (C) Copyright 2010
   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 #ifdef CONFIG_TWL6030_POWER
  25
  26 #include <twl6030.h>
  27
  28 /* Functions to read and write from TWL6030 */
  29 static inline int twl6030_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
  30 {
  31         return i2c_write(chip_no, reg, 1, &val, 1);
  32 }
  33
  34 static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
  35 {
  36         return i2c_read(chip_no, reg, 1, val, 1);
  37 }
  38
  39 void twl6030_start_usb_charging(void)
  40 {
  41         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VICHRG_1500,
  42                                                         CHARGERUSB_VICHRG);
  43         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CIN_LIMIT_NONE,
  44                                                         CHARGERUSB_CINLIMIT);
  45         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MBAT_TEMP,
  46                                                         CONTROLLER_INT_MASK);
  47         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MASK_MCHARGERUSB_THMREG,
  48                                                         CHARGERUSB_INT_MASK);
  49         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VOREG_4P0,
  50                                                         CHARGERUSB_VOREG);
  51         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_100,
  52                                                         CHARGERUSB_CTRL2);
  53         /* Enable USB charging */
  54         twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1_EN_CHARGER,
  55                                                         CONTROLLER_CTRL1);
  56         return;
  57 }
  58
  59 void twl6030_init_battery_charging(void)
  60 {
  61         twl6030_start_usb_charging();
  62         return;
  63 }
  64
  65 void twl6030_usb_device_settings()
  66 {
  67         u8 data = 0;
  68
  69         /* Select APP Group and set state to ON */
  70         twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VUSB_CFG_STATE);
  71
  72         twl6030_i2c_read_u8(TWL6030_CHIP_PM, &data, MISC2);
  73         data |= 0x10;
  74
  75         /* Select the input supply for VBUS regulator */
  76         twl6030_i2c_write_u8(TWL6030_CHIP_PM, data, MISC2);
  77 }
  78 #endif