u-boot/drivers/power/pmic/pmic_max77686.c

/*
 *  Copyright (C) 2012 Samsung Electronics
 *  Rajeshwari Shinde <rajeshwari.s@samsung.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 <common.h>
#include <fdtdec.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/max77686_pmic.h>
#include <errno.h>

DECLARE_GLOBAL_DATA_PTR;

int pmic_init(unsigned char bus)
{
	static const char name[] = "MAX77686_PMIC";
	struct pmic *p = pmic_alloc();

	if (!p) {
		printf("%s: POWER allocation error!\n", __func__);
		return -ENOMEM;
	}

#ifdef CONFIG_OF_CONTROL
	const void *blob = gd->fdt_blob;
	int node, parent;

	node = fdtdec_next_compatible(blob, 0, COMPAT_MAXIM_MAX77686_PMIC);
	if (node < 0) {
		debug("PMIC: No node for PMIC Chip in device tree\n");
		debug("node = %d\n", node);
		return -1;
	}

	parent = fdt_parent_offset(blob, node);
	if (parent < 0) {
		debug("%s: Cannot find node parent\n", __func__);
		return -1;
	}

	p->bus = i2c_get_bus_num_fdt(parent);
	if (p->bus < 0) {
		debug("%s: Cannot find I2C bus\n", __func__);
		return -1;
	}
	p->hw.i2c.addr = fdtdec_get_int(blob, node, "reg", 9);
#else
	p->bus = bus;
	p->hw.i2c.addr = MAX77686_I2C_ADDR;
#endif

	p->name = name;
	p->interface = PMIC_I2C;
	p->number_of_regs = PMIC_NUM_OF_REGS;
	p->hw.i2c.tx_num = 1;

	puts("Board PMIC init\n");

	return 0;
}