LXR uboot/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 * twl4030_power_reset_init is derived from code on omapzoom,
  21 * git://git.omapzoom.com/repo/u-boot.git
  22 *
  23 * Copyright (C) 2007-2009 Texas Instruments, Inc.
  24 *
  25 * twl4030_power_init is from cpu/omap3/common.c, power_init_r
  26 *
  27 * (C) Copyright 2004-2008
  28 * Texas Instruments, <www.ti.com>
  29 *
  30 * Author :
  31 *      Sunil Kumar <sunilsaini05 at gmail.com>
  32 *      Shashi Ranjan <shashiranjanmca05 at gmail.com>
  33 *
  34 * Derived from Beagle Board and 3430 SDP code by
  35 *      Richard Woodruff <r-woodruff2 at ti.com>
  36 *      Syed Mohammed Khasim <khasim at ti.com>
  37 *
  38 */
  39
  40#include <twl4030.h>
  41
  42/*
  43 * Power Reset
  44 */
  45void twl4030_power_reset_init(void)
  46{
  47        u8 val = 0;
  48        if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, &val,
  49                                TWL4030_PM_MASTER_P1_SW_EVENTS)) {
  50                printf("Error:TWL4030: failed to read the power register\n");
  51                printf("Could not initialize hardware reset\n");
  52        } else {
  53                val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
  54                if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, val,
  55                                         TWL4030_PM_MASTER_P1_SW_EVENTS)) {
  56                        printf("Error:TWL4030: failed to write the power register\n");
  57                        printf("Could not initialize hardware reset\n");
  58                }
  59        }
  60}
  61
  62/*
  63 * Set Device Group and Voltage
  64 */
  65void twl4030_pmrecv_vsel_cfg(u8 vsel_reg, u8 vsel_val,
  66                                u8 dev_grp, u8 dev_grp_sel)
  67{
  68        /* Select the Device Group */
  69        twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, dev_grp_sel,
  70                                dev_grp);
  71
  72        /* Select the Voltage */
  73        twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, vsel_val,
  74                                vsel_reg);
  75}
  76
  77void twl4030_power_init(void)
  78{
  79        /* set VAUX3 to 2.8V */
  80        twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX3_DEDICATED,
  81                                TWL4030_PM_RECEIVER_VAUX3_VSEL_28,
  82                                TWL4030_PM_RECEIVER_VAUX3_DEV_GRP,
  83                                TWL4030_PM_RECEIVER_DEV_GRP_P1);
  84
  85        /* set VPLL2 to 1.8V */
  86        twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VPLL2_DEDICATED,
  87                                TWL4030_PM_RECEIVER_VPLL2_VSEL_18,
  88                                TWL4030_PM_RECEIVER_VPLL2_DEV_GRP,
  89                                TWL4030_PM_RECEIVER_DEV_GRP_ALL);
  90
  91        /* set VDAC to 1.8V */
  92        twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VDAC_DEDICATED,
  93                                TWL4030_PM_RECEIVER_VDAC_VSEL_18,
  94                                TWL4030_PM_RECEIVER_VDAC_DEV_GRP,
  95                                TWL4030_PM_RECEIVER_DEV_GRP_P1);
  96}
  97
  98void twl4030_power_mmc_init(void)
  99{
 100        /* Set VMMC1 to 3 Volts */
 101        twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VMMC1_DEDICATED,
 102                                TWL4030_PM_RECEIVER_VMMC1_VSEL_30,
 103                                TWL4030_PM_RECEIVER_VMMC1_DEV_GRP,
 104                                TWL4030_PM_RECEIVER_DEV_GRP_P1);
 105}
 106