2 * Copyright (C) 2012 Samsung Electronics
3 * Lukasz Majewski <l.majewski@samsung.com>
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 #include <power/pmic.h>
26 #include <power/max8997_pmic.h>
30 unsigned char max8997_reg_ldo(int uV)
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;
46 static int pmic_charger_state(struct pmic *p, int state, int current)
54 if (state == CHARGER_DISABLE) {
55 puts("Disable the charger.\n");
56 pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
57 val &= ~(MBCHOSTEN | VCHGR_FC);
58 pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
63 if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
64 printf("%s: Wrong charge current: %d [mA]\n",
69 fc = (current - CHARGER_MIN_CURRENT) / CHARGER_CURRENT_RESOLUTION;
70 fc = fc & 0xf; /* up to 950 mA */
72 printf("Enable the charger @ %d [mA]\n", fc * CHARGER_CURRENT_RESOLUTION
73 + CHARGER_MIN_CURRENT);
75 val = fc | MBCICHFCSET;
76 pmic_reg_write(p, MAX8997_REG_MBCCTRL4, val);
78 pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
79 val = MBCHOSTEN | VCHGR_FC; /* enable charger & fast charge */
80 pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
85 static int pmic_charger_bat_present(struct pmic *p)
92 pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
94 return !(val & DETBAT);
97 static struct power_chrg power_chrg_pmic_ops = {
98 .chrg_bat_present = pmic_charger_bat_present,
99 .chrg_state = pmic_charger_state,
102 int pmic_init(unsigned char bus)
104 static const char name[] = "MAX8997_PMIC";
105 struct pmic *p = pmic_alloc();
108 printf("%s: POWER allocation error!\n", __func__);
112 debug("Board PMIC init\n");
115 p->interface = PMIC_I2C;
116 p->number_of_regs = PMIC_NUM_OF_REGS;
117 p->hw.i2c.addr = MAX8997_I2C_ADDR;
118 p->hw.i2c.tx_num = 1;
121 p->chrg = &power_chrg_pmic_ops;