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 */ 45 void 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 */ 65 void 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 77 void 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 98 void twl4030_power_mmc_init(void) 99 { 100 /* Set VMMC1 to 3.15 Volts */ 101 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VMMC1_DEDICATED, 102 TWL4030_PM_RECEIVER_VMMC1_VSEL_32, 103 TWL4030_PM_RECEIVER_VMMC1_DEV_GRP, 104 TWL4030_PM_RECEIVER_DEV_GRP_P1); 105 } 106