2 * Copyright (C) 2012 Samsung Electronics
3 * Lukasz Majewski <l.majewski@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <power/pmic.h>
10 #include <power/max8997_pmic.h>
14 unsigned char max8997_reg_ldo(int uV)
20 return MAX8997_LDO_MAX_VAL;
21 ret = (uV - 800000) / 50000;
22 if (ret > MAX8997_LDO_MAX_VAL) {
23 printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret);
24 ret = MAX8997_LDO_MAX_VAL;
30 static int pmic_charger_state(struct pmic *p, int state, int current)
38 if (state == CHARGER_DISABLE) {
39 puts("Disable the charger.\n");
40 pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
41 val &= ~(MBCHOSTEN | VCHGR_FC);
42 pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
47 if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
48 printf("%s: Wrong charge current: %d [mA]\n",
53 fc = (current - CHARGER_MIN_CURRENT) / CHARGER_CURRENT_RESOLUTION;
54 fc = fc & 0xf; /* up to 950 mA */
56 printf("Enable the charger @ %d [mA]\n", fc * CHARGER_CURRENT_RESOLUTION
57 + CHARGER_MIN_CURRENT);
59 val = fc | MBCICHFCSET;
60 pmic_reg_write(p, MAX8997_REG_MBCCTRL4, val);
62 pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
63 val = MBCHOSTEN | VCHGR_FC; /* enable charger & fast charge */
64 pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
69 static int pmic_charger_bat_present(struct pmic *p)
76 pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
78 return !(val & DETBAT);
81 static struct power_chrg power_chrg_pmic_ops = {
82 .chrg_bat_present = pmic_charger_bat_present,
83 .chrg_state = pmic_charger_state,
86 int pmic_init(unsigned char bus)
88 static const char name[] = "MAX8997_PMIC";
89 struct pmic *p = pmic_alloc();
92 printf("%s: POWER allocation error!\n", __func__);
96 debug("Board PMIC init\n");
99 p->interface = PMIC_I2C;
100 p->number_of_regs = PMIC_NUM_OF_REGS;
101 p->hw.i2c.addr = MAX8997_I2C_ADDR;
102 p->hw.i2c.tx_num = 1;
105 p->chrg = &power_chrg_pmic_ops;