u-boot/drivers/power/palmas.c

/*
 * (C) Copyright 2012-2013
 * Texas Instruments, <www.ti.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <config.h>
#include <palmas.h>

/* Functions to read and write from TWL6030 */
int twl6035_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
{
	return i2c_write(chip_no, reg, 1, &val, 1);
}

int twl6035_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
{
	return i2c_read(chip_no, reg, 1, val, 1);
}

/* To align with i2c mw/mr address, reg, val command syntax */
static inline int palmas_write_u8(u8 chip_no, u8 reg, u8 val)
{
	return i2c_write(chip_no, reg, 1, &val, 1);
}

static inline int palmas_read_u8(u8 chip_no, u8 reg, u8 *val)
{
	return i2c_read(chip_no, reg, 1, val, 1);
}

void twl6035_init_settings(void)
{
	return;
}

int twl6035_mmc1_poweron_ldo(void)
{
	u8 val = 0;

	/* set LDO9 TWL6035 to 3V */
	val = 0x2b; /* (3 -.9)*28 +1 */

	if (palmas_write_u8(0x48, LDO9_VOLTAGE, val)) {
		printf("twl6035: could not set LDO9 voltage.\n");
		return 1;
	}

	/* TURN ON LDO9 */
	val = LDO_ON | LDO_MODE_SLEEP | LDO_MODE_ACTIVE;

	if (palmas_write_u8(0x48, LDO9_CTRL, val)) {
		printf("twl6035: could not turn on LDO9.\n");
		return 1;
	}

	return 0;
}