1 /* 2 * Copyright (C) 2012 Samsung Electronics 3 * Rajeshwari Shinde <rajeshwari.s@samsung.com> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 #include <fdtdec.h> 26 #include <i2c.h> 27 #include <power/pmic.h> 28 #include <power/max77686_pmic.h> 29 #include <errno.h> 30 31 DECLARE_GLOBAL_DATA_PTR; 32 33 int pmic_init(unsigned char bus) 34 { 35 static const char name[] = "MAX77686_PMIC"; 36 struct pmic *p = pmic_alloc(); 37 38 if (!p) { 39 printf("%s: POWER allocation error!\n", __func__); 40 return -ENOMEM; 41 } 42 43 #ifdef CONFIG_OF_CONTROL 44 const void *blob = gd->fdt_blob; 45 int node, parent; 46 47 node = fdtdec_next_compatible(blob, 0, COMPAT_MAXIM_MAX77686_PMIC); 48 if (node < 0) { 49 debug("PMIC: No node for PMIC Chip in device tree\n"); 50 debug("node = %d\n", node); 51 return -1; 52 } 53 54 parent = fdt_parent_offset(blob, node); 55 if (parent < 0) { 56 debug("%s: Cannot find node parent\n", __func__); 57 return -1; 58 } 59 60 p->bus = i2c_get_bus_num_fdt(parent); 61 if (p->bus < 0) { 62 debug("%s: Cannot find I2C bus\n", __func__); 63 return -1; 64 } 65 p->hw.i2c.addr = fdtdec_get_int(blob, node, "reg", 9); 66 #else 67 p->bus = bus; 68 p->hw.i2c.addr = MAX77686_I2C_ADDR; 69 #endif 70 71 p->name = name; 72 p->interface = PMIC_I2C; 73 p->number_of_regs = PMIC_NUM_OF_REGS; 74 p->hw.i2c.tx_num = 1; 75 76 puts("Board PMIC init\n"); 77 78 return 0; 79 } 80