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/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <power/pmic.h>
#include <power/max8997_pmic.h>
#include <i2c.h>
#include <errno.h>
unsigned char max8997_reg_ldo(int uV)
{
unsigned char ret;
if (uV <= 800000)
return 0;
if (uV >= 3950000)
return MAX8997_LDO_MAX_VAL;
ret = (uV - 800000) / 50000;
if (ret > MAX8997_LDO_MAX_VAL) {
printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret);
ret = MAX8997_LDO_MAX_VAL;
}
return ret;
}
static int pmic_charger_state(struct pmic *p, int state, int current)
{
unsigned char fc;
u32 val = 0;
if (pmic_probe(p))
return -1;
if (state == PMIC_CHARGER_DISABLE) {
puts("Disable the charger.\n");
pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
val &= ~(MBCHOSTEN | VCHGR_FC);
pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
return -1;
}
if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
printf("%s: Wrong charge current: %d [mA]\n",
__func__, current);
return -1;
}
fc = (current - CHARGER_MIN_CURRENT) / CHARGER_CURRENT_RESOLUTION;
fc = fc & 0xf; /* up to 950 mA */
printf("Enable the charger @ %d [mA]\n", fc * CHARGER_CURRENT_RESOLUTION
+ CHARGER_MIN_CURRENT);
val = fc | MBCICHFCSET;
pmic_reg_write(p, MAX8997_REG_MBCCTRL4, val);
pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
val = MBCHOSTEN | VCHGR_FC; /* enable charger & fast charge */
pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
return 0;
}
static int pmic_charger_bat_present(struct pmic *p)
{
u32 val;
if (pmic_probe(p))
return -1;
pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
return !(val & DETBAT);
}
static struct power_chrg power_chrg_pmic_ops = {
.chrg_bat_present = pmic_charger_bat_present,
.chrg_state = pmic_charger_state,
};
int pmic_init(unsigned char bus)
{
static const char name[] = "MAX8997_PMIC";
struct pmic *p = pmic_alloc();
if (!p) {
printf("%s: POWER allocation error!\n", __func__);
return -ENOMEM;
}
debug("Board PMIC init\n");
p->name = name;
p->interface = PMIC_I2C;
p->number_of_regs = PMIC_NUM_OF_REGS;
p->hw.i2c.addr = MAX8997_I2C_ADDR;
p->hw.i2c.tx_num = 1;
p->bus = bus;
p->chrg = &power_chrg_pmic_ops;
return 0;
}
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