116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
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/*
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* Copyright (c) 2009 Wind River Systems, Inc.
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* Tom Rix <Tom.Rix at windriver.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* twl4030_power_reset_init is derived from code on omapzoom,
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* git://git.omapzoom.com/repo/u-boot.git
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*
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* Copyright (C) 2007-2009 Texas Instruments, Inc.
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*
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* twl4030_power_init is from cpu/omap3/common.c, power_init_r
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*
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* (C) Copyright 2004-2008
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Sunil Kumar <sunilsaini05 at gmail.com>
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* Shashi Ranjan <shashiranjanmca05 at gmail.com>
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*
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* Derived from Beagle Board and 3430 SDP code by
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* Richard Woodruff <r-woodruff2 at ti.com>
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* Syed Mohammed Khasim <khasim at ti.com>
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*
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*/
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#include <twl4030.h>
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/*
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* Power Reset
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*/
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void twl4030_power_reset_init(void)
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{
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u8 val = 0;
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if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, &val,
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TWL4030_PM_MASTER_P1_SW_EVENTS)) {
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printf("Error:TWL4030: failed to read the power register\n");
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printf("Could not initialize hardware reset\n");
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} else {
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val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
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if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, val,
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TWL4030_PM_MASTER_P1_SW_EVENTS)) {
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printf("Error:TWL4030: failed to write the power register\n");
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printf("Could not initialize hardware reset\n");
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}
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}
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}
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/*
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* Power Init
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*/
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#define DEV_GRP_P1 0x20
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#define VAUX3_VSEL_28 0x03
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#define DEV_GRP_ALL 0xE0
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#define VPLL2_VSEL_18 0x05
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#define VDAC_VSEL_18 0x03
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void twl4030_power_init(void)
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{
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unsigned char byte;
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/* set VAUX3 to 2.8V */
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byte = DEV_GRP_P1;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VAUX3_DEV_GRP);
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byte = VAUX3_VSEL_28;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VAUX3_DEDICATED);
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/* set VPLL2 to 1.8V */
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byte = DEV_GRP_ALL;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VPLL2_DEV_GRP);
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byte = VPLL2_VSEL_18;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VPLL2_DEDICATED);
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/* set VDAC to 1.8V */
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byte = DEV_GRP_P1;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VDAC_DEV_GRP);
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byte = VDAC_VSEL_18;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VDAC_DEDICATED);
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}
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#define VMMC1_VSEL_30 0x02
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void twl4030_power_mmc_init(void)
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{
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unsigned char byte;
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byte = DEV_GRP_P1;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VMMC1_DEV_GRP);
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/* 3 Volts */
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byte = VMMC1_VSEL_30;
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twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
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TWL4030_PM_RECEIVER_VMMC1_DEDICATED);
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}
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