1 /* 2 * Copyright (C) 2012 Samsung Electronics 3 * Lukasz Majewski <l.majewski@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 <power/pmic.h> 26 #include <power/max8997_pmic.h> 27 #include <i2c.h> 28 #include <errno.h> 29 30 unsigned char max8997_reg_ldo(int uV) 31 { 32 unsigned char ret; 33 if (uV <= 800000) 34 return 0; 35 if (uV >= 3950000) 36 return MAX8997_LDO_MAX_VAL; 37 ret = (uV - 800000) / 50000; 38 if (ret > MAX8997_LDO_MAX_VAL) { 39 printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret); 40 ret = MAX8997_LDO_MAX_VAL; 41 } 42 43 return ret; 44 } 45 46 int pmic_init(unsigned char bus) 47 { 48 static const char name[] = "MAX8997_PMIC"; 49 struct pmic *p = pmic_alloc(); 50 51 if (!p) { 52 printf("%s: POWER allocation error!\n", __func__); 53 return -ENOMEM; 54 } 55 56 puts("Board PMIC init\n"); 57 58 p->name = name; 59 p->interface = PMIC_I2C; 60 p->number_of_regs = PMIC_NUM_OF_REGS; 61 p->hw.i2c.addr = MAX8997_I2C_ADDR; 62 p->hw.i2c.tx_num = 1; 63 p->bus = bus; 64 65 return 0; 66 } 67